摘要:
This invention relates to stable one-part latex compositions prepared by aqueous emulsion polymerization wherein a core-shell polymer is formed, the core formed by emulsion polymerization of an ethylenically unsaturated monomer in the presence of an epoxy resin and the shell polymer formed by emulsion polymerization of a hydroxy carboxyl containing monomer composition in the presence of the core, providing that the monomers in both the core and the shell do not contain amino functional groups, and post-adding to the formed core-shell polymer an organic compound having at least one amino functional group which is available for later reaction with the epoxy resin upon drying to produce a crosslinked polymer product.
摘要:
A two-part aqueous-based adhesive suitable for dry-bonding a polyether urethane foam to a rigid or semi-rigid substrate consists essentially of (a) an aqueous latex of an anionic emulsion polymer having a Tg of 0.degree. C. or below, preferably -5.degree. to -30.degree. C., an effective amount of a diepoxide or polyepoxide curing agent, and optionally, but preferably, an effective amount of a fugitive plasticizer. The polymer consists essentially of about 10-30% ethylene, 40 to 80% of vinyl acetate, 5-35% of a C.sub.4 -C.sub.8 -dialkyl maleate, and 4-10% of an ethylenically unsaturated acid monomer (e.g., acrylic acid). Suitable substrates include styrene board and fiberglass board.
摘要:
An improved process for the production of paper coating binders wherein ethylene, vinyl ester and optional comonomers are polymerized using batch emulsion polymerization techniques and wherein the improvement comprises subjecting the emulsion to microfluidization to produce a particle size of less than about 0.5 microns prior to the emulsion polymerization step.
摘要:
Latex adhesives having a Tg of -60.degree. to 0.degree. C. characterized by superior rheological properties, are prepared without the use of additional thickeners from a colloid stabilized latex comprising: 65-90% by weight of the latex polymer solids of an acrylate or methacrylate ester monomer polymerized in 10-35% by weight of the latex solids of a polymeric colloid, the polymeric colloid having a Tg of -40.degree. to 0.degree. C., a number average molecular weight of 2,000 to 10,000 and comprising(a) 50 to 85% by weight of a monomer of the formula: ##STR1## where R' is hydrogen or methyl and R" is a C.sub.1 -C.sub.12 straight or branched chain alkyl group;(b) 10 to 50% by weight of an ethylenically unsaturated mono- or dicarboxylic acid;(c) 5 to 30% by weight of an acrylic or methacrylic ester of a polyalkylene oxide, and(d) 0 to 30% by weight of another ethylenically unsaturated copolymerizable monomer.
摘要:
Latex adhesives having a Tg of -60.degree. to 0.degree.C. characterized by superior rheological properties, are prepared without the use of additional thickeners from a colloid stabilized latex comprising: 65-90% by weight of the latex polymer solids of an acrylate or methacrylate ester monomer polymerized in 10-35% by weight of the latex solids of a polymeric colloid, the polymeric colloid having a Tg of -40.degree. to 0.degree.C., a number average molecular weight of 2,000 to 10,000 and comprising(a) 50 to 85% by weight of a monomer of the formula: ##STR1## where R' is hydrogen or methyl and R" is a C.sub.1 -C.sub.12 straight or branched chain alkyl group;(b) 10 to 50% by weight of an ethylenically unsaturated mono- or dicarboxylic acid;(c) 5 to 30% by weight of an acrylic or methacrylic ester of a polyalkylene oxide, and(d) 0 to 30% by weight of another ethylenically unsaturated copolymerizable monomer.
摘要:
The present invention relates to colored latex products, and especially to colored synthetic polymer emulsions, the finely divided colored polymers obtainable therefrom, and methods for making the colored polymer emulsions as well as the polymers as colored, finely divided solids.
摘要:
The present invention is directed to sizing compositions for use on glass fibers which are used to reinforce lamination resins used in the formation of glass laminates. The sizing compositions contain a low molecular weight, polymer latex prepared by polymerizing at least one monomer(s) selected from the group consisting of acrylic acid, methacrylic acid, C.sub.1 -C.sub.18 alkyl esters of acrylic acid, C.sub.1 -C.sub.18 alkyl esters of methacrylic acid, glycidyl acrylate, glycidyl methacrylate, C.sub.1 -C.sub.4 hydroxyalkyl esters of acrylic acid, C.sub.1 -C.sub.4 hydroxyalkyl esters of methacrylic acid, vinyl esters of saturated aliphatic monocarboxylic acids containing up to 10 carbon atoms, (meth)acrylamide and their N-substituted derivatives, vinyl ethers, N-vinyl lactams, halogenated vinyl compounds, alkyl vinyl ketones, (meth)allyl ester of saturated aliphatic monocarboxylic acids, vinyl compounds such as vinyl pyrrole, olefins, diesters of itaconic, maleic and/or fumaric acid, and styrene. The polymers have a molecular weight effective to provide both improved wettability of the glass fibers by the lamination resins and improved clarity of reinforced glass laminates prepared from the sized glass fibers and the lamination resins, when compared to sizing compositions known heretofore. The invention is also directed to glass fibers treated with such compositions, and fiber-reinforced plastics prepared from such treated glass fibers.
摘要:
Shelf-stable, one-package aqueous latices, which are curable with or without the application of heat, consist essentially of an alkaline-curable, self-crosslinking emulsion polymer, selected organic metal salts, and water. The alkali, alkaline earth, or heavy metal salts of C.sub.1 -C.sub.6 organic acids (e.g., sodium acetate) are post-added to th polymer emulsion or present during the polymerization. The polymer typically comprises about 90-99.9% by weight of one or more vinyl polymerizable monomers (e.g., acrylates, vinyl esters, and ethylene) and 0.1-10% by weight of a polymerizable non-ionic or cationic self-crosslinking monomer containing halohydrin groups (e.g., 3-chloro-2-hydroxypropyl (meth)acrylate or the reaction product of epichlorohydrin and N,N-dimethylaminopropyl methacrylamide or methacrylate).
摘要:
High solids, low viscosity, alkaline-curable, thermosetting cationic vinyl ester based polymer latices, characterized by the high molecular weight of the polymer therein, are prepared by polymerizing at least 5% of selected vinyl esters (up to C.sub.6), 0.5-10% of a self-crosslinking cationic quaternary ammonium monomer, and optionally a vinyl polymerizable monomer such as butyl acrylate, ethylene, acrylamide, diallyl maleate, and/or 2-hydroxyethyl acrylate. The polymerization is carried out in the presence of water, a watersoluble cationic azo initiator, a water-soluble amino thiol salt chain transfer agent, and a cationic and/or nonionic surfactant. The latices are useful as formaldehyde-free binders for polyester nonwovens.
摘要:
The present invention is directed to sizing compositions for use on glass fibers which are used to reinforce lamination resins used in the formation of glass laminates. The sizing compositions contain a low molecular weight, polymer latex prepared by polymerizing at least one monomer(s) selected from the group consisting of acrylic acid, methacrylic acid, C.sub.1 -C.sub.18 alkyl esters of acrylic acid, C.sub.1 -C.sub.18 alkyl esters of methacrylic acid, glycidyl acrylate, glycidyl methacrylate, C.sub.1 -C.sub.4 hydroxyalkyl esters of acrylic acid, C.sub.1 -C.sub.4 hydroxyalkyl esters of methacrylic acid, vinyl esters of saturated aliphatic monocarboxylic acids containing up to 10 carbon atoms, (meth)acrylamide and their N-substituted derivatives, vinyl ethers, N-vinyl lactams, halogenated vinyl compounds, alkyl vinyl ketones, (meth)allyl ester of saturated aliphatic monocarboxylic acids, vinyl compounds such as vinyl pyrrole, olefins, diesters of itaconic, maleic and/or fumaric acid, and styrene. The polymers have a molecular weight effective to provide both improved wettability of the glass fibers by the lamination resins and improved clarity of reinforced glass laminates prepared from the sized glass fibers and the lamination resins, when compared to sizing compositions known heretofore. The invention is also directed to glass fibers treated with such compositions, and fiber-reinforced plastics prepared from such treated glass fibers.