Abstract: This invention provides a process for preparing a stable aqueous emulsion composition which has excellent properties for application as a wet abrasion-resistant paper coating binder. The dispersed copolymer of the aqueous emulsion composition comprises a major proportion of vinyl acetate and a minor proportion of an amino-containing vinyl monomer. An important aspect of the emulsion preparation method is the addition of an aqueous solution of the amino-containing vinyl monomer as a separate feedstream, wherein the amine group in the said vinyl monomer is in the form of an amine-acid salt.

Abstract: Described is a process for augmenting or enhancing the aroma of a perfumed article selected from the group consisting of fabric softener compositions, fabric softener articles and optical brightener compositions comprising the step of intimately admixing with a fabric softener article coating, or a fabric softener composition, or an optical brightener composition, an aroma augmenting or enhancing quantity of a compound having the structure: ##STR1##

Abstract: Vinyl chloride monomer is suspension polymerized in an aqueous suspension polymerization medium in the presence of an effective amount of an organotin mercaptide and an expoxidized vegetable oil to lessen the amount of polymer scale formation from the reaction.

Abstract: Olefin/maleic acid copolymer is refined to pharmaceutical quality by extraction of contaminants with hexane or heptane.

Abstract: The invention relates to the production of vinyl dispersion or paste resins by means of the emulsion polymerization process and the recovery of the resins from the polymer latices produced thereby. In the process, the polymer latex is first carefully coagulated to yield a fast filtering sludge, the sludge is passed to a pressure filter to separate a high solids, friable polymer wetcake from the serum, the wetcake is rinsed with proper agents to neutralize the same and remove undesirable residues, pressure in the filter is applied to the rinsed wetcake to increase the solids content thereof, the wetcake is then broken into particles and friable agglomerates, and thereafter said particles and agglomerates are dried and ground to proper size in one step in a fluid energy mill. Thus the spray drying and the subsequent harsh grinding steps are eliminated producing a superior product for plastisols.

Abstract: Vulcanizable rubber compositions are described which are inhibited from premature vulcanization by N-(sulfenyl) methacrylamides.

Abstract: A curable composition consisting essentially of (A) at least one rubber selected from the group consisting of a styrene-butadiene rubber, an acrylonitrile-butadiene rubber, a polybutadiene rubber, an acrylonitrile-isoprene rubber, an alfin rubber, a butadiene-methyl methacrylate rubber, a polyisoprene rubber, an acrylonitrile-butadiene-isoprene rubber, a carboxylated acrylonitrile-butadiene rubber, a propylene oxide rubber, a propylene-butadiene rubber, and natural rubber, (B) at least one curing agent selected from the group consisting of sulfur and sulfur donors, and (C) at least one compound, as a vulcanization accelerator not requiring an activator, selected from the group consisting of arginine, lysine, hydroxy-lysine, ornithine, proline, hydroxyproline, leucine, isoleucine, histidine, tryptophan, threonine, serine, homoserine, alanine, phenylalanine, valine, methionine, citrulline, tyrosine, asparagine, aspartic acid, glutamine, glutamic acid, and salts of these amino acids.

Abstract: Disclosed herein are monomeric compounds having the formula: ##STR1## wherein: R and R.sup.1 are independently hydrogen, halide or alkyl;R.sup.2 and R.sup.3 are independently hydrogen, alkyl, cycloalkyl, aryl or aralkyl;q is 0 or 1; andAr is arylene wherein no more than one of R.sup.2 and R.sup.3 is hydrogen, and a method of preparing same. These monomers can be homopolymerized or copolymerized with one or more other monomers to yield polymers having desirable solubility characteristics. In particular, copolymerizable ethylenically unsaturated monomers can comprise aldehyde-containing vinylaryl ethers to yield crosslinkable polymers useful in relief image materials or as binders in photographic layers.

Abstract: This invention relates to blends of plasticizing oils and compatible tackifiers with olefin copolymers containing propylene, either 1-butene or 1-pentene and 3 to 14 mole percent of at least one C.sub.6 to C.sub.10 linear .alpha.-olefin which are useful as hot-melt, pressure-sensitive adhesives. The unmodified copolymer base resins have melt viscosities in the range of 10,000 cp up to about 1,000,000 cp at 190.degree. C. The addition of the plasticizing oils and compatible tackifiers to the copolymer base resin causes a dramatic and unexpected increase in the shear adhesion failure time in addition to improved coatability as well as substantial increases in probe tack and peel adhesion values of the copolymers.

Abstract: It has been found that saturated, halogen-containing polymers can be cross-linked to yield stable vulcanizates using 2,5-dimercapto-1,3,4-thiadiazole in the presence of certain basic materials in normal vulcanization procedures.

Abstract: A diorgano sulfur oxide is included in a curable vinylidene fluoride elastomer formulation to provide desirable curing characteristics.

Abstract: A halogenated polyethylene, or a mixture of it with a sulfur-curable rubber and/or a vinyl chloride resin can be cured with a combination of sulfur and/or a sulfur donor, and at least one amino acid selected from the group consisting of lysine, ornithine, arginine and proline.

Abstract: A leather cleaning and preserving composition comprising 30-50 parts by weight of a non drying animal oil, 20-30 parts by weight of a non drying vegetable oil, 10-20 parts by weight of an animal fat, 5-10 parts by weight of a natural wax, and 5-10 parts by weight of a mineral or petroleum wax.

Abstract: A process for the cross-linking of high density polyethylene in the solid state according to which the polyethylene is admixed with the agents normally used for the vulcanization of unsaturated rubber compounds, then processed into the desired article and thereafter cross-linked at a temperature lower than the melting point of the polyethylene, the process being carried out in polyethylene containing a certain number of unsaturated bonds along the polymer chain.

Abstract: Halogen-containing bis-acrylates and bis-methacrylates corresponding to the formula ##STR1## in which R represents hydrogen or a methyl group and X represents chlorine and/or bromine, are provided as well as a process for producing such compounds. The compounds are useful for the formation of polymers and copolymers and as cross-linking agents. Also included in the invention are the polymers and copolymers based on the above-described halogen-containing bis-acrylates and bis-methacrylates, methods for the production of said polymers and the use of said polymers as flame proofing agents, etc.

Abstract: In a method for inhibiting the corrosion-causing tendency and coloration of an olefin polymer or copolymer containing a halogen component by incorporating about 0.01 to about 5 parts by weight of a hydrotalcite; the improvement which comprises mixing an olefin polymer or copolymer containing a halogen component attributed to a polymerization catalyst and/or to post-halogenation, with a hydrotalcite of the formulaMg.sub.1-x Al.sub.x (OH).sub.2 A.sub.x/n.sup.n-.mH.sub.2 Owherein0<x.ltoreq.0.5, m is a positive number, andA.sup.n- represents an anion having a valence of n, or a product resulting from the surface-coating of said hydrotalcite with an anionic surface-active agent, said hydrotalcite having (i) a BET specific surface area of not more than 30 m.sup.2 /g, preferably not more than 20 m.sup.2 /g, (ii) an average secondary particle size of not more than 5 microns, preferably not more than 1.

Abstract: A method of continuously treating an aqueous latex of a synthetic polymer which contains unreacted residual monomer from the polymerization reaction used for the production of the polymer, which method comprises feeding the aqueous latex as a spray into a vessel defining a chamber so that all or a substantial quantity of the droplets of spray avoid contact with the side wall of the chamber, and contacting the falling spray with steam flowing counter-current thereto whereby residual monomer is removed with the flow of steam leaving the chamber. Apparatus for carrying out the method is also claimed. The method is advantageously employed for the removal of residual vinyl chloride monomer from a latex of a vinyl chloride polymer.

Abstract: A continuous process is provided for producing substantially homogeneous, non-tacky solid terpolymers of acrylamide, an alkali metal salt of acrylic acid and a hydroxyalkyl acrylate, and copolymers, optionally cross-linked, of a (meth)acrylamidoalkylsulfonic acid or alkali metal salt thereof and (meth)acrylamide or N-alkyl(meth)acrylamide, by rapidly heating a single phase high solids aqueous solution of the monomers to polymerization initiation temperature immediately prior to depositing a uniform layer of the solution and, at the same time, a solution of a polymerization initiator, onto a moving surface, the surface and the reaction mixture only being heated if necessary to keep the temperature of the polymerizing mixing from dropping substantially below the polymerization initiation temperature.

Abstract: Addition of alkylated diarylamines to improve polychloroprene produced without using the salts of the condensation product of naphthalene sulfonic acids and formaldehyde.

Abstract: In an improved process for preparing discrete particles from solution polymers in which water and neutralizing agent are added to the polymer to form a suspension, the organic solvent is removed therefrom, and the particles are collected by filtration, washing and drying, the suspension is formed by co-feeding the flowable polymer and the aqueous phase containing neutralizing agent into a reactor vessel under specified conditions; stirring the reactants; and discharging the resultant suspension from the reactor vessel, with all steps being carried out in a continuous manner. In one embodiment of the process, additional neutralizing agent, which is preferably sodium hydroxide, is added to the suspension during removal of the solvent therefrom.