Abstract: The method of preparing aqueous dispersions of copolymers of styrene dibutyl maleate and acrylic or methacrylic acid or monobutyl maleate consists in adding a monomer mixture comprising styrene in the amount of 40-90% by weight, dibutyl maleate in the amount of 10-60% by weight acrylic or methacrylic acid or monobutyl maleate in the amount of 1.0-10.0% by weight in relation to the sum of styrene monomer and dibutyl maleate into the emulsion water known constituents such as:ionic emulsifier - non-ionic emulsifier, buffer, sodium acrylate, N-methylolmethacrylamide to which, prior to polymerization, an alkylene glycol comprising 2-6 carbon atoms in the alkylene group is added. The alkylene glycol is added in the amount of 1-6% by weight in relation to the sum of styrene monomer and dibutyl maleate while, the ratio of alkylene glycol to the methacrylic acid or monobutyl maleate contained in the monomer mixture is 1:0.2-2. The polymerization process is conducted at a temperature of 70.degree.-90.degree. C.

Abstract: A process for the preparation of copolymer dispersions having a narrow particle size distribution, and exhibiting dilatant flow over a broad range of concentrations, by emulsion copolymerization of from 1 to 10% by weight, based on total monomers, of .alpha.,.beta.

Abstract: Strongly adhering aqueous plastic dispersions based on copolymers of olefinically unsaturated compounds, which are particularly suitable as binding agents for paints and lacquers and as adhesives, and which are distinguished by their good wet adhesion are described. This is achieved by the inclusion by polymerization of from 0.2% to 7% by weight, based on the total weight of the monomers, of vinyl and/or allyl diacetylacetate having the formula:CH.sub.2 .dbd.CH--(CH.sub.2).sub.n --O--CO--CH(CO--CH.sub.3).sub.2wherein n is 0 or 1, in the production of copolymers of the invention in an aqueous emulsion.

Abstract: This invention concerns a nonwoven fabric particularly adapted for use as a diaper coverstock. The fabric consists essentially of fibers and a binder wherein at least 50%, by weight, of the fibers are hydrophobic fibers. The binder comprises a water insoluble, hydrophobic, emulsion copolymer of ethylenically unsaturated monomers comprising (A) 1 to 8% by weight of a monoethylenically unsaturated carboxylic acid, or a mixture thereof, (B) 50 to 75% by weight of a C.sub.4 to C.sub.8 alkyl acrylate or a mixture thereof, and (C) 20 to 49% by weight of methyl methacrylate, styrene, .alpha.-methyl styrene or a mixture thereof. The fabric has sufficient wet tensile strength for use as a diaper coverstock.

Abstract: An aqueous dispersion of a vinylidene chloride copolymer resin which, when coated onto a synthetic resinous film substrate, has the combined properties of: (1) good adhesion to the substrate; (2) good adhesion of a printing ink to the coating; (3) excellent barrier to gases (especially oxygen) and water vapor; and (4) a high resistance to a boiling water treatment. The dispersion must contain methacrylic acid in an amount of from about 1.times.10.sup.-4 to about 3.times.10.sup.-4 moles per gram of polymer solids content. The dispersion must also have a molar ratio of acrylonitrile to methyl methacrylate of from about 0 to 1 to about 1 to 1. A limited portion of the amount of methacrylic acid is contained in the aqueous phase. The remaining amount of methacrylic acid is polymerized with the vinylidene chloride.

Abstract: A method for producing latices of copolymers of butyl acrylate and 1-methyacrylate-1-tert-butyl peroxy ethane resides in the emulsion copolymerization of butyl acrylate and 1-methacrylate-1-tert-butyl peroxy ethane carried out by prepolymerizing of butyl acrylate up to a conversion degree of 90-100% followed by introducing 1-methacrylate-1-tert-butyl peroxy ethane into the reaction mass. For a redox system, use is made of potassium persulfate and sodium metabisulfate.

Abstract: An aqueous latex of a copolymer derived from defined relative proportions of (i) vinylidene chloride, (ii) vinyl chloride, (iii) an alkyl acrylate or methacrylate and (iv) an unsaturated carboxylic acid forms stable protective films on a variety of substrates.

Abstract: Single-package coating or ink composition of pH 7 to 12 comprising a reaction product of a binder resin and a scavenging agent which reacts with anions of the initiator used to prepare the binder resin, the binder resin has a Tg of 20.degree. to 70.degree. C., is prepared in an aqueous medium devoid of emulsifiers, and is a polymer of an ethylenically unsaturated acid of 3 to 10 carbon atoms and an acrylic monomer(s) selected from alkyl acrylates and methacrylates containing 4 to 24 carbon atoms, amount of the acid being 0 to 5 parts per 100 parts of the acrylic monomer(s).

Abstract: A process is described for making sterically stabilized non-aqueous dispersions of composite polymer microparticles, in which (1) monomers including at least one crosslinking monomer are polymerized in an aqueous medium at a temperature at least 10.degree. higher than the glass transition temperature of the polymer to be formed, in the presence of a block or graft copolymer stabilizing agent, under conditions such that there is at no time present a separate monomer phase, (2) further monomers, not including any crosslinking monomer, are polymerized in the dispersion thus obtained, the presence of a separate monomer phase again being avoided, and (3) the microparticles are transferred from the resulting dispersion into a non-aqueous medium which is a solvent for the non-crosslinked polymer generated in (2). The microparticles are of value for incorporation into coating compositions the main film-forming constituent of which is compatible with the non-crosslinked component of the particles.

Abstract: Aqueous dispersions containing from 30% to 70% by weight of cross-linkable copolymers based on esters of (meth)acrylic acid comprising esters of (meth)acrylic acid and/or styrene, and other ethylenically-unsaturated compounds copolymerizable therewith and from 1% to 15% by weight based on the total weight of the copolymer, of allyl esters of .alpha.-hydroxycarboxylic acids. These dispersions can be used as a base of stoving enamels, which can be hardened to obtain coats of great surface hardness and great flexibility on metals.

Abstract: Sterically stabilized aqueous polymer dispersions of at least 20% solids content are made by free radical-initiated polymerization of monomers in an aqueous medium at a temperature at least 10.degree. C. higher than the glass transition temperature of the polymer to be formed, in the presence of a compound which is soluble in the aqueous medium and contains in the molecule a polymeric component of molecular weight at least 1000 which is solvatable by the aqueous medium and an unsaturated grouping which can copolymerize with the monomers, the conditions being such that there is at no time present a separate monomer phase. The dispersions are useful as a basis of improved coating compositions.