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WO1980001891A1 - Colle pour lignocellulosique solide - Google Patents

Colle pour lignocellulosique solide Download PDF

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Publication number
WO1980001891A1
WO1980001891A1 PCT/US1979/000173 US7900173W WO8001891A1 WO 1980001891 A1 WO1980001891 A1 WO 1980001891A1 US 7900173 W US7900173 W US 7900173W WO 8001891 A1 WO8001891 A1 WO 8001891A1
Authority
WO
WIPO (PCT)
Prior art keywords
bonding
starch
adhesive
sugar
catalyst
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1979/000173
Other languages
English (en)
Inventor
J Stofko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/839,462 external-priority patent/US4183997A/en
Application filed by Individual filed Critical Individual
Priority to JP54501665A priority Critical patent/JPS5831112B2/ja
Priority to BR7908868A priority patent/BR7908868A/pt
Priority to PCT/US1979/000173 priority patent/WO1980001891A1/fr
Priority to CA324,842A priority patent/CA1124631A/fr
Priority to AU50465/79A priority patent/AU5046579A/en
Publication of WO1980001891A1 publication Critical patent/WO1980001891A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08L3/02—Starch; Degradation products thereof, e.g. dextrin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C08L5/14—Hemicellulose; Derivatives thereof

Definitions

  • This invention relates to the bonding together of solid lignocellulosic materials, particularly of wood.
  • adhesives such as ureaor phenol formaldehyde are employed, which are spread or otherwise applied to the surface of the material, and penetrate the wood structure whereby bonding is effected by the adhesive.
  • Procedures have been proposed to effect such bonding by chemical reactions between reagents and the wood itself, but have not met commercial acceptance.
  • U. S. patents in the names of Willey et al 2,495,043 and Wilson 2 , 639 , 994 suggest the treatment of wood with acid, followed by pressing. Neither process achieves satisfactory results, i.e.
  • Hydrolysis of wood carbohydrates to sugars results in significant loss of strength because, besidespartial transformation of carbohydrates to sugars, unhydrolyzed carbohydrates are depolymerized to a high degree which means splitting to shorter molecular chain fragments. It is not possible to confine this hydrolytic degradation to a thin surface layer with the intention of producing a "bonding layer" without affecting adjacent layers. Those adjacent layers are always at least partially degraded with significantly decreased wood strength.
  • Salisbury U. S. Patent 2,204,384 does not produce bonding which is resistant to cold or. hot water.
  • bonding adhesive is applied in cold conditions . Starch and sucrose are s tabilized by nonvolatile acids, mixed atmoderate temperatures, then cooled to produce a water-soluble adhesive in powder form which is thereafter diluted in water before use.
  • a method of bonding solid lignocellulosic materials which comprises providing a layer consisting essentially of one or more sugars or starches or mixtures thereof and a catalyst capable of effecting the transformation of such sugars and starches, to a surface of the material and pressing surfaces of the material together at an elevated temperature and pH such that hydrolytic degradation of the wood is avoided, to provide a waterproof bond.
  • the method of the invention may be used for manufacture of laminates, plywood and composite products from particulate wood without the use of traditional adhesives.
  • any lignocellulosic material can be bonded, regardless of size and shape.
  • bonding is created by chemical transformation of the sugars and starches which are applied the wood surface and possibly by coupling of their transformation products to wood lignin.
  • a basic feature of the present invention by which it is distinguished from processes based on the hydrolysis of wood carbohydrates, is that sugars and starches can be transformed to a solid, insoluble in water, or a condensate with wood phenolics without using strong acids which cause wood hydrolysis with detrimental effect on wood strength.
  • Simple sugars do not need any hydrolysis; disaccharide-sucrose is easily hydrolyzed to simple sugars at low concentration of hydrogen ion, ammonia ion and other compounds such as dimethyl formamide; and starch is hydrolyzed in hot water. Further chemical transformation of simple sugars to a solid insoluble in water takes place at much higher pH which can be created without using acids and which do not have an hydrolytic effect on wood.
  • a carrier e.g. liquid, containing sugars and/or starches and a catalyst
  • various forms of wood particles - coated with the bonding composition - can be so pressed in order to produce various boards.
  • the liquid composition containing sugars and/or starches and a catalyst may be heated at temperatures of 100-300oC for 30-120 minutes before application to the material to be bonded to transform sugars and starches into furane type intermediate products.
  • the hot composition can be applied to a wood surface in the same way as an unheated one, followed by pressing under heat and pressure for a time sufficient to produce bonding. Using the hot composition may be advantageous in cases where shorter pressing times are required
  • the bonding composition may include a liquid carrier which is non-reactive with the lignocellulosic material, such as water, ethyl alcohol and other solvents.
  • the quantity of carrier in the bonding composition is merely that sufficient to provide a composition which can be easily handled and applied in the desired manner and at the desired rate to the wood.
  • the vapors from the carrier may readily escape from the unsealed press during the pressing operation.
  • Mixtures of various sugars and starches as well as mixtures of various catalysts in a carrier may be employed.
  • the composition may also contain other chemical reagents capable of affecting the bonding reaction, i.e. agents accelerating or reducing the extent of the reaction in which the sugars and starches participate, plasticizers or cross- linking agents, depending upon the reaction conditions which may vary 'widely.
  • Such reagents may be incorporated in the desired amount in the carrier liquid together with the sugars and/ or starches and the catalysts.
  • reagents capable of accelerating the rate of reaction there may be briefly mentioned ethylene glycol, furfuryl alcohol, amines in general, e.g. ethyl amine, n-propyl amine, cetyl amine, diethyl amine, methyl ethyl amine, diphenyl amine, triethyl amine, aniline, etc., and amine salts, e.g. methylammonium chloride, dimethylammonium bromide, trimethylammonium nitrate, monoethanolamine, n-phenyl diamine, polyvinyl chloride and others.
  • the quantity of accelerators useful in the bonding composition is subject to very wide range and is dependent on a variety of factors including the activity of the particular accelerator and its cost, this latter factor being a highly important consideration from the point of view of providing economically feasible product. In general, however, the quantity of accelerator will be anywhere from as little as about 2% of the quantity of sugars and starches to as much as 30% of the quantity of sugars and starches, but usually will be on the order of about 4-10% of the quantity of sugars and starches.
  • sugars are washed out from the fiber because they have been found to be harmful to conventional bonding using common bonding resins.
  • Low molecular weight sugars present in fiber can be used for bonding in accordance with the present invention so that no sugars need to be added, but only the catalyst and, if needed, the buffering alkaline material.
  • sugar can baggase is used for making particle board, and this baggase has about 8% of residual sugars which can be used for bonding woods with the present invention.
  • the optimum amount of sugars and starches used will vary depending upon the character of the wood, reactivity or other properties of the sugars and starches used, surface roughness of the wood and the pressing conditions desires, bearing in mind that the quantity of bondin com osition a lied should be sufficient to fill the open cell cavities which are present on the surface of wood thus increasing the contact area between adjacent wood surfaces and substantially improving the bonding strength.
  • bonding veneers only a film of the composition need be applied which can be conveniently done by brushing, spraying or roller spreading.
  • an amount of the bonding composition may be employed which will provide from
  • sugars and starches may be employed, including monosaccharides and disaccharides, e.g.: mannose, glucose, maltose, lactose, sucrose; starches such as amylose and amylopectin, dextrin, wheat or corn flour; molasses of various origins and mixtrues of sugars and starches. Inexpensive molasses represents an attractive possibility.
  • the catalysts which may be used include dimethyl formamide with iodine, dimethyl sulfoxide, propylene oxide with ethylene glycol and zinc chloride, both organic and inorganic salts; such as aluminum chloride, ammonium chloride, ammonium nitrate, sodium nitrate, potassium nitrate, ammonium sulfate, potassium tartrate, sodium phosphate, calcium phosphate, sodium sulfate, zinc chloride, diammonium phosphate, superphosphate and others. It is preferred to use the ammonium or sodium salts. Nitrates and phosphates are most effective and economical. Phosphates in addition to catalyzing sugar and starch transformation, also provide to some degree fire retardant treatment to the wood.
  • the amount of catalyst present is generally from 1 to 50% by weight based on the sugars and starches and particularly in cases when a higher degree of fire retardancy is desired up to about 100% or even more; the preferred ratio depends on the identity of sugars and starches and the kind of catalyst. It is preferred to keep the amount of catalyst used to the minimum level necessary to catalyze the sugar and st arch transformation into the furane type compounds and their polymerization. A large excess of catalyst without buffering may be harmful to wood strength over a long period of time.
  • the transformation of polymeric starches, such as potato starch, into furane type compounds requires a somewhat higher proportion of catalyst than simpler sugars, such as glucose or sucrose, for a given reaction rate.
  • buffers may be used.
  • a 20% water solution of ammonium nitrate has a pH of about 6.5.
  • ammonium nitrate dissociates and the pH goes down to about 2.
  • alkali e.g. sodium or ammonium hydroxide
  • the pH at higher temperatures drops to the level of the wood pH so that pH of the product is between 3.5 - 5.5 depending upon the pH of wood. Maintaining the pH of the liquid carrier and the final product at the proper level eliminates any hydrolytic effect with its resulting strength decrease of wood, and this is of crucial importance for bond quality.
  • a mixture of sugars and starches such as sucrose and wheat flour, is used. It is advantageous to use sugars and starches of approximately the same decomposition rate. Simple sugars and starche are preferred to polymeric ones because of their higher decomposition rate. Price and availability, however, are probably the most important factors in deciding which raw material to use. Pressing conditions in the press will vary widely depending upon variables, such as kind of sugars and starches, kind of wood, kind and amount of catalyst and requirements on the product. As usual for any given system, the lower the temperature, the longer the pressing time and vice versa. The pressing temperature should not exceed the temperature at which charring of the lignocellulosic material will occur nor should the pressure exceed that at which the desired specific gravity of the product is exceeded.
  • the preferred temperature range is 140 to 300oC and the preferred pressure range 5 to
  • the pressing time required under these conditions is a time needed to raise the core temperature at which chemical transformation of sugars and starches to a solid insoluble in water takes place, which is 160 to 212oC depending upon the kind and amount of catalyst.
  • the invention may be applied to any kind of wood bonding such as in plywood or composite board production.
  • composite products such as particle or fiberboards
  • the same procedure is followed as for plywood manufacture except that the particles are covered by the carrier containing sugars and starches and catalyst which can be achieved by spraying and mixing followed by board formation and pressing in the press.
  • Yellow pine veneers 30 cm square, 3.5 mm thick, with moisture content of about 4%, were brushed on both surfaces with water solution containing 35% of wheat flour, 15% of sucrose, 2.5% ammonium chloride, and 2.5% ammonium sulfate, in the amount of 18 grams of the solution per 900 cm 2 .
  • the veneers were exposed to temperature of 150oC for four minutes, whereupon the surfaces of the veneers became completely dried and turned black. Two veneers not covered with the bonding solution were wetted on one surface with water in the amount of about 5 grams per area of 900 cm 2 .
  • Veneers with wetted surfaces were laid up adj acent veneers having dried bonding solution on both surfaces in such a way that wetted surfaces were in contact with dried bonding solution on veneer located between them with fiber direction perpendicular to the fiber direction of the surface veneers .
  • Lai d up veneers were pressed in cold press at 14 kgs/cm 2 for 5 minutes. After removal from the press veneers were stuck togeth so that they could be handled without danger of separating.
  • Samples of Douglas fir plywood were made under conditions of Example I except that the veneers were brushed with water solution containing 25% of wheat flour, 20% of black strap molasses, 2.5% of ammonium chloride, and 2.5% of ammonium sulfate.
  • Strength tests showed shear strength of about 16 kg/ which was comparable to similar products using phenol formaldehyde adhesive. Shear strength in wet conditions after four hours boiling water followed by twenty hours drying at 53oC and again four hours boiling was about 8kg/cm 2 .
  • Samples of pine plywood were made under conditions of Example I except that instead of dry veneers, wet veneers having moisture content of more than 35% were brushed with water solution containing 35% of wheat flour, 15% of sucrose,
  • Douglas fir shavings having a moisture content of about 4% were sprayed with the water solution containing 35% of sucrose and 10% of ammonium nitrate. The amount used was 25% of the solution to wood weight. Sprayed particles were then dried at a temperature of 155 oC for five minutes. After drying the particles turned brown and had about 4% moisture content. A particle mat was formed from dried particles which was transferred into a hot press platten at temperature of 170oC and particle board of 12 mm thickness was pressed for ten minutes. After cooling to room temperature internal bond tests in dry condition, and after 2 hours boiling in water were performed. The tests showed internal bond value of 8kgs/cm 2 in dry condition, and 2 kgs/cm 2 after boiling.
  • Particle board of pinewood particles was made at the same conditions as in Example IV, except that particles were sprayed with a solution containing 30% of wheat flour, 15% of sucrose, and 15% of ammonium nitrate. Strength properties were about the same as those in Example IV.
  • Example VI Particle board of pinewood particles was made at the same conditions as in Example IV, except that particles were sprayed with a solution containing 30% of wheat flour, 15% of sucrose, and 15% of ammonium nitrate. Strength properties were about the same as those in Example IV.
  • Particle board of okume-wood particles was made under the same conditions as in Example IV, except that particles were sprayed with a solution containing 60% of black strap molasses and 8% of ammonium nitrate. Strength properties obtained were about equal to those obtained in Example IV.
  • Example VII
  • Pinewood particles having moisture content of about 6% were sprayed with a water solution containing 40% of sucrose 25% of superphosphate and 7% of zinc chloride. The amount use was 15% of the solution to wood weight. Sprayed particle were dried in oven at 250°F temperature for 30 minutes to about 4% moisture content. A particle mat was formed from dried particles which was transferred into the hot press with press platten at temperature of 410oF and particle board of 12.7 mm thickness was pressed for 10 minutes. After cooling to room temperature, internal bond, thickness swelling after 24 hours soaking in cold water and after 2 hours boiling in water were tested. Tests showed internal bond value of 7.5 kg/cm 2 , 6% swelling in cold water and 8% swelling in boiling water. Example VIII
  • Example X Following the procedure of Example VIII, a particle board was made using 10% of the solution made of sucrose, dimethyIsulfoxide and zinc chloride in the ratio 6:6:1 by weight.
  • Example X Example X
  • Example XI a particle board was made using 10% of the solution to wood weight made of sucrose, ethylene glycol, propylene oxide and zinc chloride in the ratio 6:3:1.7:1. Propylene oxide was added to cooked mixture of sucrose, ehtylene glycol and zinc chloride after cooling to room temperature. Particle boards made using procedure of Examples VIII to X had good properties and were boiling waterproof.
  • Example XI
  • Pressing time and pressure in particle board production according to the present invention can be further reduced by using powdery or melted sucrose in place of a solution thereof, anhydrous aluminum chloride as the catalyst either alone or with others, and without a liquid carrier.
  • Aluminum chloride, AlCl 3 or AI 2 CI 6 is marketed as a powder.
  • a composition of 87-97% sucrose, 2-8% aluminum chloride and 1-5% of ethylene glycol is thoroughly mixed.
  • a small amount of ethylene glycol, OHCH 2 CH 2 OH is used to obtain a more homogenous distribution of aluminum chloride in the sucrose and to accelerate the transformation reactions.
  • the percentage of aluminum chloride for a particular kind of wood will vary due to differences in chemical composition of wood.
  • Sucrose-aluminum chloride mixture is admixed with wood particles so that a uniform distribution of sucrose on particle surfaces is obtained.
  • Moisture content of wood should be under 5%, since the lower the moisture content the higher the reaction speed obtained. Hot particles coming from the particle drier can be advantageously mixed with the sucrose-aluminum chloride powder.
  • sucrose-aluminum chloride powder can be pressed into boards without predrying. Since powder is slightly wet, good attachment to wood particles is obtained so that no accumulation of powder on the lower caul plate is observed. At pressing temperature, sucrose is transformed to liquid which plasticizes the wood so that lower pressures are needed to obtain the final compression of the particle mat.
  • a composition of 95-99% of sucrose and 1-5% of anhydrous aluminum chloride is thoroughly mixed.
  • sucrose-aluminum chloride mix is heated under constant mixing until the sucrose is transformed into black viscous liquid.
  • One hundred gms. of a composition containing 98.5% of sucrose and 1.5% of aluminum chloride is transformed to a black liquid in a beaker heated on a heating plate in about three minutes.
  • the hot black melted sucrose is applied to wood particles by spraying or rubbing (Lodige system) as an adhesive.
  • Ethylene glycol can be used to adjust viscosity if necessary.
  • Application facility has to be kept at higher temperature because melted sucrose is liquid only while hot. It has been found that the addition of ammonium nitrate to hot melted sucrose before application to wood speeds up the bonding reaction.
  • Anhydrous aluminum chloride was found to be an effective catalyst with powdery or melted sucrose.
  • the necessity of predrying the wood particles before pressing was eliminated and pressing times and pressures substantially reduced. Pressing time depends upon the amount of the catalyst and water present in particles. The lower the amount of catalyst, the faster the bonding reaction proceeds.
  • sucrose in powder or a a melt the amount of water in the reaction system is substantially reduced.
  • Incorporation of ethylene glycol into the system instead of water for the purpose of obtaining a better chloride distribution in powdery sucrose or for viscosity adjustment in melted sucrose was found beneficial. Ethylene glycol probably improves heat transfer into the panel center.
  • the amount of aluminum chloride should be kept at the lowest possible level for the particular wood species and desired pressing time.
  • the amount of sucrose which has to be used to obtain good bonding of particles depends on the particle geometry.
  • the amount of 10% to wood weight was used because the redwood sawdust used was very fine with great surface area. Amounts between 4 and 10% will be appropriate for commercial particles.
  • the amount of aluminum chloride to be used will vary with wood species. Percentages from about 0.2 to 1.0% to wood weight appear realistic. For any particular wood species the percentage of aluminum chloride has to be found through routine experimentation.
  • the amount of ammonium nitrate between about 0.5 to 4% appears realistic, although this may vary somewhat depending on the particular wood species. Strap molasses will react similarly as melted sucrose does with aluminum chloride provided that water content of the molasses is reduced prior to incorporating the aluminum chloride.
  • Hardboard had the following properties: specific gravity 1.05; modulus of ruptures 4200 psi; modulus of elasticity 530,000 PSI; internal bond 170 PSI; thickness swelling after 24 hours soaking in water 12% and after 2 hours of boiling in water 24.5%.
  • composite board was made from wood fibers using a solution: (a) In a first sample, the 10% of ammonium nitrate was buffered to pH of 10.5 by adding sodium hydroxide.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Forests & Forestry (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Laminated Bodies (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

Du materiau solide lignocellulosique est agglomere par chauffage et pressage a un pH naturel du bois, en faisant reagir des sucres, des amidons ou les deux en presence d'un catalyseur pour la transformation des sucres et des amidons en un solide, insoluble dans l'eau, ainsi qu'un agent tampon alcalin si necessaire, par exemple pour fabriquer des contreplaques impermeables a l'eau ou des produits composites a partir de particules de bois sans degradation hydrolytique du bois.
PCT/US1979/000173 1977-10-04 1979-03-16 Colle pour lignocellulosique solide Ceased WO1980001891A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP54501665A JPS5831112B2 (ja) 1977-10-04 1979-03-16 固体リグノセルロ−ス系材料の結合方法
BR7908868A BR7908868A (pt) 1979-03-16 1979-03-16 Ligacao de material lignocelulosico solido
PCT/US1979/000173 WO1980001891A1 (fr) 1977-10-04 1979-03-16 Colle pour lignocellulosique solide
CA324,842A CA1124631A (fr) 1979-03-16 1979-04-03 Assemblage de matieres solides lignocellulosiques
AU50465/79A AU5046579A (en) 1977-10-04 1979-08-31 Bonding of lignocellulosic fiber materials

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US05/839,462 US4183997A (en) 1974-02-22 1977-10-04 Bonding of solid lignocellulosic material
WOUS79/00173 1979-03-16
PCT/US1979/000173 WO1980001891A1 (fr) 1977-10-04 1979-03-16 Colle pour lignocellulosique solide
AU50465/79A AU5046579A (en) 1977-10-04 1979-08-31 Bonding of lignocellulosic fiber materials

Publications (1)

Publication Number Publication Date
WO1980001891A1 true WO1980001891A1 (fr) 1980-09-18

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PCT/US1979/000173 Ceased WO1980001891A1 (fr) 1977-10-04 1979-03-16 Colle pour lignocellulosique solide

Country Status (3)

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JP (1) JPS5831112B2 (fr)
AU (1) AU5046579A (fr)
WO (1) WO1980001891A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161766A1 (fr) * 1984-03-30 1985-11-21 Kuo Cheng Shen Produit composite en matières lignocellulosiques
US11572491B2 (en) 2017-02-24 2023-02-07 Panasonic Intellectual Property Management Co., Ltd. Adhesive for heat press molding, wooden board, and manufacturing methods thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0286718U (fr) * 1988-12-23 1990-07-10
WO2015056367A1 (fr) * 2013-10-15 2015-04-23 パナソニックＩｐマネジメント株式会社 Composition liante et panneau
JP6603509B2 (ja) 2015-08-05 2019-11-06 ヘンケルジャパン株式会社 水系接着用組成物
JP6662587B2 (ja) 2015-08-05 2020-03-11 ヘンケルジャパン株式会社 水系接着用組成物

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204384A (en) * 1937-04-24 1940-06-11 Henry M Salisbury Adhesive composition and method of preparing the same
US2290548A (en) * 1939-06-27 1942-07-21 Laucks I F Inc Gluing method
US2495043A (en) * 1943-10-08 1950-01-17 United States Gypsum Co Laminated product and process of making same
US2557071A (en) * 1945-10-12 1951-06-19 Masonite Corp Process of making a plywood product
US2639994A (en) * 1948-07-26 1953-05-26 Winfred E Wilson Process for manufacturing composite board
US3565651A (en) * 1968-08-19 1971-02-23 Ralston Purina Co Adhesive process
US4007312A (en) * 1973-09-27 1977-02-08 The Regents Of The University Of California Method of bonding solid lignocellulosic material, and resulting product

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204384A (en) * 1937-04-24 1940-06-11 Henry M Salisbury Adhesive composition and method of preparing the same
US2290548A (en) * 1939-06-27 1942-07-21 Laucks I F Inc Gluing method
US2495043A (en) * 1943-10-08 1950-01-17 United States Gypsum Co Laminated product and process of making same
US2557071A (en) * 1945-10-12 1951-06-19 Masonite Corp Process of making a plywood product
US2639994A (en) * 1948-07-26 1953-05-26 Winfred E Wilson Process for manufacturing composite board
US3565651A (en) * 1968-08-19 1971-02-23 Ralston Purina Co Adhesive process
US4007312A (en) * 1973-09-27 1977-02-08 The Regents Of The University Of California Method of bonding solid lignocellulosic material, and resulting product

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161766A1 (fr) * 1984-03-30 1985-11-21 Kuo Cheng Shen Produit composite en matières lignocellulosiques
AU586191B2 (en) * 1984-03-30 1989-07-06 Kuo Cheng Shen Composite products from lignocellulosic materials
US11572491B2 (en) 2017-02-24 2023-02-07 Panasonic Intellectual Property Management Co., Ltd. Adhesive for heat press molding, wooden board, and manufacturing methods thereof

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Publication number Publication date
JPS5831112B2 (ja) 1983-07-04
JPS56500414A (fr) 1981-04-02
AU5046579A (en) 1981-03-05

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