Resin properties polyacrylates

U.S. 5154847 (1992) LaPetina et al. (Helene Curtis) Ethylene-maleic anhydride resin or polyacrylic acid resin, and alkanolamide and/or wax ester Improved suspending stability improved foaming properties... 

Chem. Descrip. Polyacrylate adsorbed on silicon dioxide Uses Leveling agent, anticratering agent tor powd. coatings based on epoxy, PE/epoxy, PE, PU, and acrylate resins Properties Sp.gr. 1.26 63% acrylate content UseLevei 0.5-1.5%... 

Chem. Descrip. Aliphatic hydrocarbon resin emulsions Uses Resin emulsion used in combination with other aq. thermoplastic and/or elastomeric systems to produce coatings, paints, and adhesives extender, tackifier for NR, SR waterproof finishes for paper, textiles esp. suitable for use in high-styrene SBR, EVA resin, and polyacrylic-based latex paints, and in adhesives for bonding films, fibers, and granular materials food-pkg. and processing operations Properties Gardner 9 (50% in toluene) liq. dens. 0.97 kg/l vise. 3000 cps soften, pt. (R B) 63 C pH 8.5 anionic 50% aq. disp. 

Acryiic Resin AS. See Acrylic resin Acrylic resin. See Polyacrylic acid Acrylic sheet. See Acrylic resin Acrylic/styrene/acrylonitrile terpolymer Synonyms Acrylonitrile/styrene/acrylate Acrylonitrile-styrene-acrylic ester copolymer ASA ASA terpolymer Definition Thermoplastic blend produced by polymerization of acrylonitrile and styrene in presence of acrylic ester latex Properties Dens. 1.08 kg/l (20 C) tens. str. 50-60 MPa tens. mod. 2500 MPa better heat and It. resist, than ABS... 

Standard-grade PSAs are usually made from styrene-butadiene rubber (SBR), natural rubber, or blends thereof in solution. In addition to rubbers, polyacrylates, polymethylacrylates, polyfvinyl ethers), polychloroprene, and polyisobutenes are often components of the system ([198], pp. 25-39). These are often modified with phenolic resins, or resins based on rosin esters, coumarones, or hydrocarbons. Phenolic resins improve temperature resistance, solvent resistance, and cohesive strength of PSA ([196], pp. 276-278). Antioxidants and tackifiers are also essential components. Sometimes the tackifier will be a lower molecular weight component of the high polymer system. The phenolic resins may be standard resoles, alkyl phenolics, or terpene-phenolic systems ([198], pp. 25-39 and 80-81). Pressure-sensitive dispersions are normally comprised of special acrylic ester copolymers with resin modifiers. The high polymer base used determines adhesive and cohesive properties of the PSA. 

Functionalization of crosslinked polymers by Mannich reaction" includes mainly polystyrenes and polyacrylics such as styrene/divinyl benzene copolymers 537-539114-117 gpjj acrylic ester/divinyl benzene copolymers 540, respectively." These materials are involved in the reaction as substrate (539)" or, more frequently, as amine reagent (sec also Fig. 163, Chap. Ill) when the crosslinked product, containing amino groups, is allowed to react with phosphorous acids (537,538, and 540). Thus, chelating properties are assumed by the resins. 

Bisphenol A is used as a raw material to make polycarbonate and epoxy adhesives and can coatings. It is also used in flame-retardants, in unsaturated polyesters and in polyacrylate resins. Many foodstuff containers are made of these resins, including containers for oven and microwave cooking. Recent studies have shown that bisphenol type compounds have both mutagenic and cytotoxic properties [84]. Nerin et al. developed a fast screening method based on SPME and HPLC with fluorescence detection suitable for the analysis of several bisphenol derivatives and their degradation products in aqueous canned foods such as tuna, olives and corn [85]. The best results were obtained with carbowax and PDMS/DVB fibers. The detection limits were between 0.7 and 2.4ngmL while RSDs were between 14 and 32%. After the extraction parameters were optimized, the method was applied to... 

Weak-acid cation-exchange resins have weak fixed reactive sites such as the carboxylic group (-COOH). They are usually copolymers of DVB and acrylic or methacrylic acid [6]. The polyacrylic acid is shown in Figure 8.3, and properties are listed in the previous Table 8.1. 

In the case of urethane emulsions, many of the commonly employed thickeners for resin emulsions may be used, such as polyacrylic acids, polyacrylamides, etc. This is particularly useful in textile coating or adhesive applications where "hold-out" properties, for example, to permit the coating to stay on the surface rather than to penetrate the substrate, are required. 

Polyacrylic resins were employed to study how immobilization resin particle size influences Candida antarctica Lipase B (CALB) loading, fraction of active sites, and catalytic properties for polyester synthesis. CALB adsorbed more rapidly on smaller beads. Saturation occurred in less than 30 seconds and 48 h for beads with diameters 35 and 560-710 pm, respectively. Infrared microspectroscopy showed that CALB forms protein loading fronts for resins with particle sizes 560-710 and 120 pm while CALB appears evenly distributed throughout 35 pm resins. The fraction of active CALB molecules adsorbed onto resins not influenced by particle size was less than 50 %. At about 5% w/w CALB loading, decrease in the immobilization support diameter from 560-710 to 120,75 and 35 pm increased conversion of s-CL to polyester (20 to 36, 42 and 61%, respectively, at 80 min). Similar trends were observed for condensation polymerizations of 1,8-octanediol and adipic acid. 

Polyacrylates as binders consist of copolymers of acrylate and methacrylate esters. Other unsaturated monomers (e.g., styrene and vinyltoluene) may also be incorporated, but usually to a lesser extent. Copolymers formed exclusively from acrylates and/or methacrylates are termed straight acrylics. The comonomers differ as regards the alcohol residues of the ester group, which also allow incorporation of additional functional groups. Choice of suitable monomers allows wide variation of the physical and chemical properties of the resulting polymer. Hydrophilicity, hydrophobic-ity, acid base properties as well as can be adjusted resins containing hydroxyl, amine, epoxy, or isocyanate groups can also be produced. 

Organic polymer adsorbents such as polystyrene, polyacrylic ester, phenolic and phenolic amine resin without functional groups (contrary to ion exchange resins) are advantageous because properties (pore volume, pore width, specific inner surface, polarity) can be adjusted in wide ranges. By this way the selective separation of polar and nonpolar substances can be achieved. The thermal stability of these polymers is limited to 180°C. 

Synonyms Acrylic acid homopolymer Acrylic acid polymer Acrylic acid, polymers Acrylic acid resin Acrylic polymer Acrylic polymer resins Acrylic resin Atactic poly(acrylic acid) PAA Polyacrylate Poly (acrylic acid) 2-Propenoic acid, homopolymer Propenoic acid polymer Propenoic acid, polymers, homopolymer Definition Polymer of acrylic acid Empiricai (C3H402)x Formuia [CH2CHCOOH]x Properties M.w. 50,000-250,000 dens. 1.02 kg/l anionic... 

As with other polymers and resins, the modification of epoxy resins eliminates a number of disadvantages including brittleness, low thermal stability and high flammability to give the required properties for end applications. Considerable effort has therefore been made to improve the thermal and mechanical properties of vegetable oil-based epoxy resins. These may be grafted or blended with other flexible resins such as polyester, polyacrylate and polyurethane to improve their flexibility and other performance characteristics. 

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