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WO2019081258A1 - Procédé pour conférer une résistance à la graisse, à l'huile et à l'eau à des substrats - Google Patents

Procédé pour conférer une résistance à la graisse, à l'huile et à l'eau à des substrats

Info

Publication number
WO2019081258A1
WO2019081258A1 PCT/EP2018/078131 EP2018078131W WO2019081258A1 WO 2019081258 A1 WO2019081258 A1 WO 2019081258A1 EP 2018078131 W EP2018078131 W EP 2018078131W WO 2019081258 A1 WO2019081258 A1 WO 2019081258A1
Authority
WO
WIPO (PCT)
Prior art keywords
polymer
composition
units
paper
vdc
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/EP2018/078131
Other languages
English (en)
Inventor
MinhDung LAM
Rebecca Nandi CLYMER
Robert James SICILIANO
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.)
Solvay SA
Original Assignee
Solvay SA
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
Application filed by Solvay SA filed Critical Solvay SA
Publication of WO2019081258A1 publication Critical patent/WO2019081258A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C09D127/08—Homopolymers or copolymers of vinylidene chloride

Definitions

  • This invention pertains to an improved method for conferring grease, oil and water repellence to substrates, involving the use of certain
  • substrates e.g. cellulosic substrates
  • different chemicals to impart grease, oil, wax and solvent repellence has been known for some time.
  • EP 1489124 A SOLVAY SOLEXIS SPA (IT) 22/12/2004 are known.
  • thermoplast resins are also known in the art. Among those approaches for modifying surface properties of cellulosic surfaces, mention can be notably made of US 3162543 (OWENS ILLINOIS GLASS COMPANY) 22/12/1964 which discloses a cellulosic material having an anti-stick and bleed-proof coating thereon, which coating comprises a mixture of a silicone
  • a two- coatings solution including a first coating of acetylated starch and a thermoplastic resin, over-coated with a second coating including same ingredients and further including silicone resin is provided.
  • VDC vinylidene chloride polymer
  • VDC polymer
  • the expressions "vinylidene chloride polymer” and "polymer (VDC)” are used hereby as synonyms to designate a polymer of which at least 50% by weight (wt%) of recurring units are derived from vinylidene chloride, with respect to the total weight of polymer (VDC).
  • the amount of recurring units derived from vinylidene chloride in the vinylidene chloride polymer varies from 50 to 99.5 wt%, preferably from 60 to 98 wt%, more preferably from 82 to 95 wt%, and most preferably from 85 to 93 wt% of the polymer (VDC).
  • vinylidene chloride homopolymer is hardly processible and generally copolymers are deemed as more commercially important, emulsion and suspension polymerisation being the preferred industrial manufacturing processes.
  • Vinylidene chloride polymer hence generally comprises recurring units derived from at least one additional ethylenically
  • Non-limiting examples of at least one ethylenically unsaturated monomer copolymerisable with vinylidene chloride that can be used include, for instance, vinyl chloride; vinyl esters, such as vinyl acetate; vinyl ethers; acrylic acids, their esters and amides; methacrylic acids, their esters and amides; acrylonitrile; methacrylonitrile; styrene; styrene derivatives, such as styrene sulfonic acid and its salts; vinyl phosphonic acid and its salts; butadiene; olefins, such as ethylene and propylene; itaconic acid, and maleic anhydride.
  • vinyl chloride vinyl esters, such as vinyl acetate; vinyl ethers; acrylic acids, their esters and amides; methacrylic acids, their esters and amides; acrylonitrile; methacrylonitrile; styrene; styrene derivatives,
  • Ri is chosen from hydrogen and -CH3 and R2 is chosen from -CN and -COR3, wherein R3 is chosen from -OH and -OR 4 , wherein R 4 is a Ci- C18 linear or branched alkyl group optionally bearing one or more -OH groups, a C2-C10 epoxy alkyl group and a C2-Cio alkoxy alkyl group, and wherein R3 is also chosen from the -NR5R6 radicals, in which R5 and R6, same or different, are chosen from hydrogen and C1-C10 alkyl groups, optionally bearing one or more -OH groups.
  • copolymerisable with vinylidene chloride is selected from the group consisting of vinyl chloride, maleic anhydride, itaconic acid, the acrylic or methacrylic monomers selected from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, glycidyl methacrylate, glycidyl acrylate, acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid, acrylamide, N-methylolacrylamide, and N,N- di(alkyl)acrylamide.
  • copolymerisable with vinylidene chloride is selected from the group consisting of maleic anhydride, itaconic acid, the acrylic or methacrylic monomers selected from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, 2- hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, glycidyl methacrylate, glycidyl acrylate, acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid, acrylamide, N-methylolacrylamide, and N,N-di(alkyl)acrylamide.
  • copolymerisable with vinylidene chloride is selected from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, glycidyl methacrylate, glycidyl acrylate, acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid, acrylamide,
  • N-methylolacrylamide and N,N-di(alkyl)acrylamide.
  • the amount of recurring units derived from the said ethylenically unsaturated monomer copolymerisable with vinylidene chloride in the vinylidene chloride polymer varies from 0.5 to 50 wt%, preferably from 2 to 40 wt%, more preferably from 5 to 18 wt%, and most preferably from 7 to 15 wt%, with respect to the total weight of polymer (VDC).
  • Polymer (VDC) is generally present in the composition (C) under the form of discrete particles; the said particles may be dispersed in a liquid carrier, or may be solubilized in the same.
  • particles of polymer (VDC) are dispersed in a liquid medium under the form of a latex, i.e. in an emulsified form, with stably dispersed particles having a particle size of at most 500 nm, preferably at most 450 nm, more preferably at most 400 nm and/or of at least 50 nm, preferably at least 75 nm, more preferably at least 100 nm.
  • polysaccharide compound or "polymer (S)” is hereby used according to its usual meaning, i.e. to encompass polysaccharides, that is to say polymers having recurring units derived from carbohydrate or carbohydrate derivatives, and polysaccharide derivatives obtained by modification/derivatization of the said polysaccharides.
  • a carbohydrate is an organic molecule possessing an aldehyde group or a ketone group, and further comprising a hydroxyl group on every carbon atom other than the aldehyde or ketone carbon atom.
  • Aldoses are carbohydrates having aldehyde carbonyl group
  • ketoses are carbohydrates having ketone carbonyl group.
  • the formula for basic carbohydrates is C n (H2O) n : these compounds contain hydrogen and oxygen in the ratio in which they are found in water, which is the origin of their name, carbohydrate being to be understood as hydrate of carbon.
  • aldoses mention can be made of D-erythrose, D-ribose, D- arabinose, D-allose, D-altrose, D-gluocose, D-mannose, D-threose, D- xylose, D-lyxose, D-gulose, D-idose, D-galactose, D-talose, as well as corresponding L-configuration compounds (which are generally quite rarely occurring in natural polysaccharides, except for L-arabinose), and all corresponding furanose and pyranose compounds, where cyclization is possible.
  • ketoses mention can be made of D-erythrulose; D-ribulose; D- xylulose; D-psicose; D-fructose; D-sorbose; D-tagatose, D-manno- octulose, as well as corresponding L-configuration compounds.
  • cyclic form e.g. a 6-membered ring, referred to as “pyranose” or a 5- membered ring, referred to as “furanose", through reaction of a hydroxyl group with the ketone or aldehyde group and formation of corresponding hemiacetal bond.
  • Carbohydrate derivatives are compounds which derive from carbohydrates through introduction of functional groups other that the hydroxyl group, aldehyde group and ketone group, or corresponding hemiacetal groups.
  • carbohydrate derivatives mention can be made of:
  • anhydro-derivatives possessing an intra-molecule ethereal bridge through condensation between two distal hydroxyl group, such as e.g. 3,6- anhydro-L-galactopyranose, which is the pyranose cycle of an L-galactose with an anhydro bridge between the carbon atoms in 3 and 6 position;
  • aldonic acids which are aldoses whereas the aldehyde group has been oxidized to a carboxylic acid group, such as e.g. D-gluconic acid;
  • - uronic acids which are aldoses or ketoses whereas the distal carbon atoms bearing the hydroxyl group has been oxidized to a carboxylic acid group, such as e.g. D-glucuronic acid, derived from D-glucose, D-guluronic acid, derived from D-gulose, D-mannuronic acid, derived from D-mannose; D-galacturonic acid from D-galactose, and corresponding cyclic forms including e.g. D-galactopyranosyluronic acid;
  • - ulosonic acids which are 2-ketoses whereas the first carbon bearing a hydroxyl group has been oxidized to a carboxylic acid group, so providing for an alpha-keto-acid, such as e.g. 3-deoxy-D-manno-oct-2-ulosonic acid, deriving from D-manno-octulose.
  • Polysaccharide derivatives can obtained by modification/derivatization of the said polysaccharides chosen from the group consisting of:
  • the mentioned modification/derivatization may introduce in the
  • polysaccharide ionisable groups such as e.g. tertiary amino or quaternary ammonium groups.
  • - celluloses i.e. polymers comprising repeat units derived from D-glucose, in its beta-pyranose structure (i.e. beta-D-gluocopyranosyl units), which are joined by (1 ⁇ 4) glycosidic linkage, or, in other words, which comprise sequences of (1 ⁇ 4) linked beta-D-gluocopyranosyl units;
  • starches i.e. mixtures of amylose, linear polysaccharide of (1 ⁇ 4) linked alpha-D-gluocopyranosyl units, and amylopectine, branched
  • polysaccharide comprising sequences of (1 ⁇ 4) linked alpha-D- gluocopyranosyl units, with branches joining the said sequences through (1 ⁇ 6) linked alpha-D-glucopyranosyl units;
  • - algins i.e. polysaccharides of D-mannuronic acid and L-guluronic acid, generally in their salified form
  • - carrageenans i.e. polysaccharides including sequences of beta-D- galactopyranosyl units, and including units of anhydro-derivative thereof, such as e.g. units of 3,6-anhydro-alpha-D-galactopyranose or units of 3,6- anhydro-alpha-L-galactopyranose; - guar gums, i.e. polysaccharides including sequences of (1 ⁇ 4) linked beta-D-mannopyranosyl units, possibly substituted with (1 ⁇ 6) linked beta- D-mannopyranosyl units;
  • pectins i.e. polysaccharides comprising sequences of (1 ⁇ 4) linked alpha-D-galactopyranosyluronic, whereas some of the carboxyl groups of the uronic acid may be under the form of alkyl esters, e.g. methyl ester form;
  • - xanthan gums i.e. polysaccharides comprising main chains made of sequences of (1 ⁇ 4) linked beta-D-glucopyranosyl units, whereas about every other beta-D-glucopyranosyl unit in the main chain is substituted on O-3 with an trisaccharide unit consisting of a beta-D-mannopyranosyl unit linked (1 ⁇ 4) to a beta-D-glucopyranosyluronic acid unit, linked (1 ⁇ 2) to a 6-O-acetyl-alpha-D-mannopyranosyl unit.
  • carboxymethylcelluloses cellulose acetates, cellulose acetate butyrate, cellulose nitrate, ethylcelluloses, hydroxyalkylcelluloses,
  • hydroxyalkylalkylcelluloses methylcelluloses, starch acetates, starch adipates, starch 1-octenylsuccinates, starch phosphates, starch
  • carboxymethylguar gums carboxymethyl(hydroxypropyl)guar gums, hydroxyethyl guar gums, hydroxypropyl guar gum, 2-hydroxy-3- (trimethylammonio)propyl guar gum and other cationic guar gums, sodium alginates, calcium alginates, methoxy pectins, sodium pectates, calcium pectate.
  • At least one vinyl alcohol polymer or “polymer (OH)” is intended to designate a polymer comprising a majority of recurring units of formula -CH 2 CH(OH)-.
  • Polymer (OH) can be derived from the hydrolysis of a variety of polyvinyl esters) such as polyvinyl acetate), polyvinyl formate), and polyvinyl benzoate) and from the hydrolysis of polyvinyl ethers). However, it is generally understood that polymer (OH) is preferably manufactured by the hydrolysis of polyvinyl acetate). Generally, polymer (OH) is hence substantially comprised of recurring units of formula -CH2CH(OH)-, i.e. is a homopolymer.
  • Polymer (OH) may be also selected from copolymers, in particular
  • Substrates used in the process of the invention are typically those used in packaging applications, comprising, notably cellulose substrates, which are indeed those preferred.
  • composition used in the process of the invention typically comprises the aforementioned polymer (S), polymer (OH) and polymer (VDC) in a liquid carrier.
  • the liquid carrier is an aqueous medium, i.e. a medium
  • compositions of the invention comprising water as major component (> 50 % wt).
  • Compositions of the invention comprising an aqueous medium are generally preferred when environmental impact is considered.
  • the polymer (S), polymer (OH) and polymer (VDC) may be solubilized or emulsified in the aqueous medium of this embodiment.
  • the aqueous medium may optionally comprise a polar organic solvent, e.g. at least one of alcohols, glycols, ethers.
  • a polar organic solvent e.g. at least one of alcohols, glycols, ethers.
  • alcohols isopropanol, ethanol, methanol, t- butanol can be used; as ethers, mention can be made of dipropylenglycol monomethylether; as glycols, ethylene or propylene glycols can be mentioned.
  • composition may comprise additional components or
  • composition may comprise at least one emulsifier
  • emulsifier (E) The choice of emulsifiers (E) is not specifically limited.
  • natural compounds possessing emulsifying ability may be used, such as notably lecithin, natural mono- and diglycerides, sorbitan fatty acid esters, poly(oxyethylene sorbitan esters, and
  • emulsifiers (E) are used when the composition (C) is an aqueous composition.
  • they are comprised in composition (C) in an amount of generally at least 0.01 % wt, preferably at least 0.05 % wt, more preferably at least 0.1 % wt and/or generally at most 5 % wt, preferably at most 4 % wt, more preferably at most 3 % wt, with respect to the total weight of the composition (C).
  • An emulsifier which has provided particularly good results is lecithin, in particular soy lecithin.
  • the composition may optionally comprise a pigment or a dye.
  • Suitable pigments include kaolin clay, delaminated clays, structured clays, calcined clays, alumina, silica, aluminosilicates, talc, calcium sulfate, ground calcium carbonates, and precipitated calcium carbonates.
  • Suitable dyes are typically organic dyes, comprising e.g. chormophores, like, for instance, derivates of acridine, anthraquinone, diphenyl or
  • composition may comprise other additives including clays,
  • dispersants dispersants, lubricants, defoamers, film-formers, antifoamers and crosslinkers.
  • composition (C) generally comprises polymer (S), polymer (OH) and polymer (VDC) in an aqueous medium.
  • composition (C) comprises:
  • VDC polymer
  • composition (C) furthermore, preferred embodiments whereas the composition (C) further
  • composition (C) comprises polymer (S), polymer (OH), polymer (VDC) and emulsifier (E) in an aqueous medium in the following amounts:
  • VDC polymer
  • %wt are referred to the total weight of the composition, comprehensive of the aqueous medium.
  • composition (C) possesses a liquid viscosity of at least 10, at least 15, preferably at least 20 mPa.sec, when measured at 25°C, using a
  • Brookfield viscometer operating at 100 rpm.
  • composition (C) of possessing a liquid viscosity of at most 150, at least 125, preferably at most 100 mPa.sec, when measured at 25°C, using a Brookfield viscometer operating at 100 rpm.
  • composition (C) as above detailed is applied on at least a portion of the surface of said cellulose substrate.
  • Cellulose substrates include notably all types and kinds of cellulose- containing materials, including notably paper (e.g. kraft paper), paper boards (e.g. solid bleached sulphite paper board) and other cellulosic fibers assemblies.
  • paper e.g. kraft paper
  • paper boards e.g. solid bleached sulphite paper board
  • other cellulosic fibers assemblies e.g. cellulosic fibers assemblies.
  • Composition (C) is generally applied on at least a portion of the surface of the said cellulose substrate in size-press treatment, coating treatment, calender water box treatment or in wet-end treatment in the paper machines.
  • a paper machine is actually a large de-watering device consisting
  • composition (C) is introduced in the initial fibres suspension dispersion and caused to deposit onto the fibres during web formation.
  • the composition (C) When used in the size-press treatment, the composition (C) is caused to impregnate the fibres web of paper by passing this latter into a sizing liquid pond located above a roll nip. As a result, the paper web absorbs the sizing liquor including the composition (C).
  • composition (C) When used in a coating treatment, the composition (C) is caused to
  • composition (C) When used in a calendar water box, the composition (C) is caused to
  • composition (C) impregnate the fibres web of paper by passing this latter through a calender stack equipped with a water box.
  • the water box applies a dilute solution of composition (C) to the calender roll which is then transferred to the paper web.
  • composition (C) is applied to at least a part of the paper surface through a printing process.
  • the printing process also advantageously comprises a drying step; in this step the composition (C) applied onto the substrate is dried, that is to say all volatile components (e.g. the liquid carrier,%) are eliminated.
  • Said drying step might be performed by different means; among others, mention can be made of heated rolls, hot air ovens, IR driers of UV driers.
  • crosslinking may be obtained, in case the composition comprises derivatives comprising UV-crosslinkable moieties.
  • intaglio printing processes are preferred as they are particularly suitable for transferring into cellulose substrates compositions having low viscosity, such as those used in the invention, and are compatible with aqueous media.
  • Gravure printing typically uses a depressed or sunken surface for the pattern to be reproduced on the cellulose substrate.
  • the pattern areas consist generally of honey comb shaped cells or wells that are etched or engraved into a cylinder, typically a metal cylinder (copper being
  • the unetched areas of the cylinder represent the non-image or unprinted areas.
  • the cylinder usually rotates in a bath of liquid
  • composition typically called the 'ink pan'.
  • the excess composition is generally wiped off the cylinder by a flexible doctor blade.
  • the composition remaining in the recessed cells advantageously forms the pattern by direct transfer to the substrate (paper or other material) as it passes between the engraved cylinder and an impression cylinder, typically rubber coated.
  • Flexography which is the major process used to print packaging materials, e.g. corrugated containers, folding cartons, multiwall sacks, paper sacks, plastic bags, milk and beverage cartons, disposable cups and containers, labels, adhesive tapes, envelopes, newspapers, and wrappers (candy and food), is another example of intaglio printing process.
  • a positive mirrored master of the required pattern is generally reproduced as a 3D relief on a rubber or polymer material roll or plate (printing cylinder).
  • the target amount of composition (C) is deposited upon the surface of the printing plate (or printing cylinder) generally using an engraved anilox roll, typically coated by an industrial ceramic whose surface contains millions of very fine dimples or cells, whose texture holds a specific amount of composition by dipping in a suitable bath of the same, excess being scraped by means of a doctor blade.
  • the so-loaded printing cylinder finally transfers the composition onto the substrate.
  • Cellulose substrates were submitted to the so-called 'kit-test' or 'Grease Resistance Test for Paper and Paperboard' according to TAPPI Test Method T 559 cm-02 standard, the higher the rating, and the better being the oil repellence of the substrate.
  • Resistance of cellulose substrates against fatty acids was determined as follows. Fatty Acid solutions numbered from 1 to 1 1 (from less to most aggressive) were prepared blending different amounts of Castor oil, Oleic acid (C18: 1 ) and Octanoic acid (C8:0) and conditioned at 60°C.
  • Specimens of substrates were introduced in an oven maintained at 60°C and 5 drops of each test solution were dipped onto each sample. After 5 minutes at 60°C, oil drops were removed with absorbent tissue and substrates were inspected for darkening of surface.
  • Rating of a substrate corresponded to the highest number of the fatty acid solution that causes no alteration to the surface.
  • PVOH was cooked to 8% of solids and Topcat L95 additive was diluted to 5% of solids prior to use.
  • the formulations of each mixture are
  • Dl deionized water
  • %wt of formulations are referred to overall weight of the formulation itself.
  • PVDC polyvinylidene chloride
  • PVH Polyvinyl alcohol
  • polysaccharide compound in water By using the rod coating method, high barrier films were created which that provided both hydrophobic & oleophobic properties on the surface of treated samples.
  • the films had coating weight about 16- 18 g/m 2 with viscosity measured range from 35 to 40 mPa.s. The coating weight is directly proportional to the viscosity of the mixture. As the viscosity of the mixture increased the coat weight also increased. Maximum level of KIT test (>13) were observed when the coating weight reached >20 g/m 2 and about KIT 3-5 achieved when the coating weight was about 10g/m 2 .
  • the sheets also had other desirable traits: excellent glossy, water proof property (Cobb60 less than 5 g/m 2 ), lower water vapor transmission rate and very little staining showed in the DIN 531 16 test.
  • a combination of tapioca and sodium alginate was used instead of cationic starch as polysaccharide compound; DIOFAN ® PVDC A736 was used as PVDC; and cellulosic substrate was unbleached base papers with BW equal to 46 g/m 2 or kraft with BW equal to 50 g/m 2 . Results are summarized in tables below. Ingredients of the formulations prepared are listed as % wt of solid component, with respect to overall weight of aqueous formulation.
  • the size press solution was prepared by mixing for at least 5 minutes required amounts of DIOFAN ® A736 PVDC latex (60%solids), Celvol 125 Polyvinyl Alcohol Starch (92-95% hydrolysis) cooked & diluted at 5% solids, Sodium Alginate cooked at 2% of solids and Tapioca starch used as a dry powder form, in deionized water until they were homogenously mixture. Then, using laboratory size press equipment the prepared solution was applied on provided base sheets. The sheets were then dried for few seconds on a bench top drier at 105°C. The sheets were sent again through the nip of size press solution and then dried. Details of formulation and properties of coated cellulose substrate are listed in the following tables.
  • the film had coating weight about 2 g/m 2 with viscosity around 87 mPa.s .
  • Press solutions contained adequate weights of PVOH, A736, lecithin, tapioca and distilled water to ultimately achieve a total solution weight of 100 g.
  • the solutions were mixed for approximately 2 minutes at room temperature.
  • Three types of base sheets were treated.
  • the coating was applied using a laboratory sheet fed size press (Mathis HF-350 # 59002) operating at a nip pressure of 4.5 bar and roller speed 10m/min.
  • First, the prepared solution was poured into the nip of the size press.
  • a sheet was passed through the size press and then dried on a bench top drier at 105°C. After drying, the sheet was allowed to cool and then passed through the size press a second time. In all, each sheet was coated twice.
  • the composition of the press solutions used and results obtained are summarized in the following tables.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un procédé pour conférer une résistance à la graisse, à l'huile et à l'eau à un substrat, ledit processus comprenant l'application, sur au moins une partie de la surface dudit substrat, d'une composition comprenant : - au moins un polymère de chlorure de vinylidène ; - au moins un composé polysaccharide ; et - au moins un polymère d'alcool vinylique.
PCT/EP2018/078131 2017-10-25 2018-10-16 Procédé pour conférer une résistance à la graisse, à l'huile et à l'eau à des substrats Ceased WO2019081258A1 (fr)

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US201762577156P 2017-10-25 2017-10-25
US62/577,156 2017-10-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021188658A1 (fr) * 2020-03-17 2021-09-23 World Centric Revêtements résistant à l'humidité, aux graisses et aux huiles pour matériaux cellulosiques

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EP1369442A1 (fr) 2002-06-06 2003-12-10 Solvay Solexis S.p.A. Compositions comprenant une dispersion aqueuse de polyuréthane réticulable ayant des structures (per)fluoropolyether
EP1371676A1 (fr) 2002-01-15 2003-12-17 Solvay Solexis S.p.A. Compositions aqueuses de perfluoropolyetherphosphates et leur utilisation pour conférer des propriétés oléophobes au papier
EP1484445A1 (fr) 2003-06-03 2004-12-08 Solvay Solexis S.p.A. Utilisation de perfluoropolyethers pour l'encollage oléophobe de papier
EP1489124A1 (fr) 2003-06-03 2004-12-22 Solvay Solexis S.p.A. Acides perfluoropolyether carboxiliques et leur utilisation pour le collage du papier oleofuge
WO2011056130A1 (fr) * 2009-11-03 2011-05-12 Stora Enso Oyj Substrat revêtu, procédé de fabrication d'un substrat revêtu, emballage et revêtement de dispersion
CN104293060A (zh) * 2014-11-11 2015-01-21 合肥不老传奇保健科技有限公司 一种外墙防水吸附抗裂水性涂料及其制备方法
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