Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/34—Silicon-containing compounds
  • C08K3/36—Silica
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/08—Metals
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/005—Stabilisers against oxidation, heat, light, ozone
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/13—Phenols; Phenolates
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/20—Carboxylic acid amides
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
  • C08K5/3472—Five-membered rings
  • C08K5/3475—Five-membered rings condensed with carbocyclic rings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
  • C08K5/3477—Six-membered rings
  • C08K5/3492—Triazines
  • C08K5/34926—Triazines also containing heterocyclic groups other than triazine groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K9/00—Use of pretreated ingredients
  • C08K9/04—Ingredients treated with organic substances
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/08—Metals
  • C08K2003/0806—Silver
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K2201/00—Specific properties of additives
  • C08K2201/011—Nanostructured additives

Definitions

• the subject of the invention is a new kind of composition containing polyamide and 5 stabilizing additives.
• the stabilizers are: an antioxidant, UV absorber, UV stabilizer, synthetic precipitated silica having a nanometer particle sizes and silver nanoparticles.
• composition is characterized by increased mechanical strength, reduced susceptibility to contamination, hydrophobic surface and antibacterial properties.
• the composition may be used in particular for household appliances production, furniture and other products exposed 10 to weather conditions.
• compositions based on polyamides which improve their mechanical properties, resistance to heat 15 and resistance to UV radiation.
• the Polish patent PL203810 describes composition containing polyamide and an antioxidant.
• the composition according to the invention contains polyamide and 0.01 -5 wt% of antioxidant relative to the total mass of polyamide.
• the antioxidant is a sterically hindered phenol.
• such resistance provides polyamide which contains derivative of a hindered piperidine.
• Polyamide with hindered piperidine derivatives was obtained in the polymerization process in the presence of aliphatic dicarboxylic acid as a chain length regulator.
• the invention is to produce the injection molded and extruded products from a polyamide composition.
• This polyamide composition includes a polyalcohol co-stabilizer form a group of secondary aryl amines, not specified enhancers and supplement with functional groups: compatibilizer.
• the composition of the invention is resistant to an elevated temperature and light.
• composition based on polyamides with increased protection against degradation due to UV radiation was described in the patent EP 0430650. This effect is achieved by the use of an antioxidant additives and UV stabilizers. As antioxidants are used:
• the methods for obtaining the polyamide composition comprising glass fiber are known from industrial practice. This type of reinforcement provides higher strength compared with the material without the addition of glass fiber.
• the relevant preparations of the fiber surface (siloxanes, titanates and other) and suitable compatibilizers with an affinity to the polymer as well as glass fiber were used for such composition in order to obtain good dispersibility glass fiber in polymer matrix and adhesion of the fibers with the polymer.
• the subject of the invention is to obtain a new polyamide-based composition intended for processing by standard methods of production (injection and extrusion) and characterized by increased strength parameters, relatively low degree of filling strengthening additives (glass fiber in the amount of 10% wt), increased resistance to UV radiation, biostatic properties and hydrophobic surface.
• the subject of the invention is the polyamide-based composition containing additives such as antioxidant, UV absorber and UV stabilizer, synthetic precipitated silica having a nanometer particle sizes and silver nanoparticles, characterized in that it containing:
• antioxidant is derivative of hindered phenol
• UV absorber is derivative of benzotriazole of formula 2:
• UV stabilizer is HALS-3 compound (Polymer of N, N'-Bis(2, 2,6,6- tetramethyl-4-piperidinyl)1 ,6-hexanediamine 8t 2,4,6-trichloro-1 ,3,5-triazine & 2,4,4-trimethyl-1 ,2-pentanamine) of formula 3:
• composition containing from 0.4 to 0.8 mass fraction (m/m) of stabilizing additives.
• ratio of an antioxidant, UV absorber and UV stabilizer is from 1 :1 :1 to 1 :1 :2.5.
• R means C8 to C22 alkane or C8 to C22 alkene and the modification occurs by reaction of isolated silanol groups with fatty amines, as a replacement of hydrogen in silanol group by amine group with substituent R.
• R means C12 to C18 alkane or C12 to C18 alkene and concentration of fatty amines is from 0.2 to 5%.
• composition contains 3 to 6 mass fraction of synthetic precipitated silica nanoparticles or organic precipitated silicates nanoparticles.
• composition contains from 0.005 to 0.03 mass fraction of silver nanoparticles
• especially preferred composition contains from 0.01 to 0.02 mass fraction of silver nanoparticles.
• a most important aspect of the present invention is to enrich the standard polyamide
• Such polyamide-based composition has even 5 to 6 times longer time of use compared to composition without such additives (as a suitability time for use assumed the change of 50% of the selected parameter which is characteristic of the product).
• Amorphous silica is composed of silicon -oxygen tetrahedra (Si0 ) 4" , which build very small particles agglomerating into larger clusters or chains of inorganic polymer structure.
• the structure of silica is responsible for its ability to exchange ions.
• Inorganic polymer is based on a nonpolar siloxane groups (Si-O-Si) and silanol groups.
• the latter group is distinguished by the free silanol groups, the even silanol groups and the associated silanol groups.
• Isolated silanol groups Si-OH are the most surface reactive groups, and provide a location for the physical adsorption of molecules and easily react with many substituents. Moreover the ability to detach the proton (Si-O ' and H + ) in silanol groups causes the acidic properties of the product surface.
• Silanol groups are responsible for the surface modification by the substitution of new groups of atoms.
• silica with the silanol groups could react with a variety of chemical compounds such as: silanes, metals halides, non-metals halides, alcohols. According to electron structure and properties of the Si-0 bonds can be determined that those are processes of nucleophilic and electrophilic substitutions.
• the surface silicon atom connected to the electrically neutral hydroxyl group can be used as a center for nucleophilic reagent. Substituent enters into the group located in the surface layer while the surface of silica is an electron acceptor.
• the surface of silica may have also electron donor properties in the case of interacting with electron acceptor substances. This is the result of inseparable pair of electrons presence in oxygen atom from hydroxyl group.
• the preparation affects the properties of the obtained silica.
• Pyrogenic silica is characterized by more regular shapes of particles, which are similar to the spherical forms as well as reduced the content of silanol group responsible for silica reactivity.
• Reduced silanol groups content causes not only a reduced amount of water but also increased the presence of stable siloxane bonds.
• Precipitated silica has a much more (50%) of silonol groups responsible for silica reactivity.
• the modification of precipitated silica surface by a fatty amine of formula 4 is the most preferred for the preparation of polyamide composition, which also improves the compatibility of the polyamide - silica system.
• Products with these additives may be colored with conventional colorants used for polyamides.
• the subject of the invention is the composition based on polyamide containing various enrichment additives such as: stabilizing additives as antioxidant, UV absorber and UV stabilizer, and/or synthetic precipitated silica or organic silicates having a nanometer particle sizes and nanoparticles of silver.
• stabilizing additives as antioxidant, UV absorber and UV stabilizer, and/or synthetic precipitated silica or organic silicates having a nanometer particle sizes and nanoparticles of silver.
• the new polyamide material is characterized by strongly increased mechanical strength parameters in a long time of usage under weather conditions as well as new traits such as reduced susceptibility to contamination, hydrophobic surface and biostatic properties (antibacterial).
• composition formed in pellet may be used for further processing by any technique used in plastics processing.
• composition according to the invention is shown in detail in the following examples. The examples should not be interpreted as a limitation of its scope.
• Polyamide 6 for injection molding processing was dosed by the main loading hopper into the plastizing system of the twin-screw extrusion machine (compander) with selected configuration of the screw segments.
• the polyamide was pre-dried to moisture content of 0.1%.
• Gravimetric auxiliary feeders dosed the additives:
• the stabilizing additives composition (antioxidant, UV absorber, UV stabilizer) against degrading effects of UV radiation, previously prepared in planetary mixer, with ratio 1 :1 :1 and amount 0,5 m/m
• silica was previously obtained by the reaction of sodium silicate solution with an inorganic acid and next elutriated of sodium sulphate.
• the silica surface was modified by fatty amines in amount of 1% (m/m). Next the silica was dried and ground.
• the specific surface area of final product was about 125 m 2 /g and the particle size was 150 - 350 nm.
• the polymer composition was plastized and homogenized at a temperature of about 220- 245°C. Then the composition was extruded as threads, which were pelletized by granulator in technological line. From such granulated products the injection molding fittings were made for study the mechanical strength properties. Part of these fittings were subjected to accelerated aging in weatherometer with xenon light source and cycle corresponding to the Mediterranean climate conditions. The test was carried out to the point where 50% change in tensile strength was achieved. Such decrease in strength occurred after 3500 hours. The fittings made from pure polyamide 6 (without additives) the 50 % decrease of tensile strength occurred after 600 hours.
• Polyamide 6 with 10% of glass fiber (GF) for injection molding processing was dosed by the main loading hopper into the plastizing system of the twin screw extrusion machine (compander) with selected configuration of the screw segments.
• the polyamide was pre-dried to moisture content of 0.1%.
• silica was previously prepared in planetary mixer, with ratio 1 :1 :1 and amount 0,5 m/m b) newly precipitated silica in amount of 4,5 m/m.
• the silica was previously obtained by the reaction of sodium silicate solution with an inorganic acid and next elutriated of sodium sulphate.
• the silica surface was modified by fatty amines in amount of 1%
• the polymer composition was plastized and homogenized at a temperature of about 220- 245°C. Then the composition was extruded as threads, which were pelletized by granulator in technological line. From such granulated products the injection molding fittings were made for study the mechanical strength properties. Part of these fittings were subjected to accelerated aging in weatherometer with xenon light source and cycle corresponding to the Mediterranean climate conditions. The test was carried out to the point where 50% change in tensile strength was achieved. Such decrease in strength occurred after 3500 hours. The fittings made from pure polyamide 6 (without additives) the 50 % decrease of tensile strength occurred after 600 hours.

Landscapes

• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Compositions Of Macromolecular Compounds (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47116242

Family Applications (1)

Country Status (3)

Cited By (1)

Citations (6)

• 2012
  • 2012-07-23 PL PL400101A patent/PL221727B1/pl unknown
  • 2012-09-11 CZ CZ2015-119A patent/CZ2015119A3/cs unknown
  • 2012-09-11 WO PCT/PL2012/000086 patent/WO2014017933A1/fr not_active Ceased

Patent Citations (7)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events