Abstract: Copolymers of (1) from about 80% to about 98% by weight of acrylic acid and (2) from about 2% to about 20% by weight of itaconic acid and having a weight average molecular weight of between about 50,000 to about 1,000,000, preferably between about 100,000 to about 500,000, and which are at least water dispersible, are used as fluid loss control additives for aqueous drilling fluids and are particularly advantageous when used with muds containing soluble calcium and muds containing chloride ions such as seawater muds. An example is a copolymer of 95% by weight acrylic acid and 5% by weight itaconic acid in its sodium salt form.

Abstract: Novel polymerizable imidazolidinone monomers, useful in the preparation of self-crosslinking polymers, have the general structure ##STR1## wherein R.sup.1 is H or a C.sub.1 -C.sub.6 linear or branched alkyl or hydroxyalkyl group; X is a divalent radical selected from the group consisting of --(CH.sub.2).sub.m --, ##STR2## with R being H or CH.sub.3, m being 0-5, and n being 1-5; R.sup.2 is H or CH.sub.3 ; R.sup.3 is H or ##STR3## with R' as defined above; and R.sup.4 and R.sup.5 are independently H or linear or branched C.sub.1 -C.sub.4 alkyl groups. In a preferred embodiment, aqueous emulsions of the imidazolidinone-containing polymers (e.g. 45-60% vinyl acetate, 34-52% butyl acrylate, and 3-6% imidazolidinone) and an acid-curing catalyst (e.g. ZnCl.sub.2) are used as formaldehyde-free binders for nonwoven textiles.

Abstract: Products formed from chlorosulfonyl isocyanate either by sequentially reaction of a hydroxy functional compound followed by reaction of the sulfonyl chloride group with a primary or secondary amine, or by reaction of chlorosulfonyl isocyanate with an excess of primary or secondary amine, are cure accelerators for acrylic compositions. Depending on the choice of alcohol or amine, the accelerator may be functionalized so that it is bound or bindable to an organic or silicone polymer backbone or contains other desirable functionality such as peroxy, photosensitizer, or acrylic groups.

Abstract: A fluorine-containing copolymer comprising chlorotrifluoroethylene, 2,2,3,3-tetrafluoropropyl vinyl ether and 0 to 25% by mole of a vinyl ether having a functional group selected from the group consisting of hydroxyl group, glycidyl group and amino group. The fluorine-containing copolymer has a good compatibility with methyl methacrylate polymers and gives, in combination use with methyl methacrylate polymers, products such as coating film, self-supporting film and molded article, which have good stain resistance and transparency.The fluorine-containing copolymer is preferably an alternating copolymer comprising chlorotrifluoroethylene and 2,2,3,3-tetrafluoropropyl vinyl ether.

Abstract: In the polymerization of tetrafluoroethylene with comonomers to make melt-processible copolymers, the presence of a selected salt of a perfluoroalkoxy-benzene sulfonic acid or salt of the acid enhances process performance.

Abstract: Pressure-sensitive adhesives are prepared by the simultaneous polymerization of minor amounts of at least one alkenyl azlactone monomer and at least one arylic-functional carboxylic acid monomer, or precursors thereof, with a major amount of at least one acrylic monomer. The pressure-sensitive adhesives, after application to a substrate, will significantly increase in adhesion to the resultant bonded substrate after they are in the bonded configuration.

Abstract: A copolymer for an fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance comprises vinylidene fluoride units and fluorovinyl ether units having the formula CF.sub.2 =CFOX (X represents a C.sub.3 -C.sub.9 perfluoroalkyl group which has ether bond having 1-3 oxygen atom) at a molar ratio of vinylidene fluoride units to fluorovinyl ether units of 95:5 to 50:50 and at a total content of the units of at least 80 mole %.

Abstract: An improved process for terminating the suspension polymerization reaction of vinyl chloride monomer into polyvinyl chloride which comprises adding hindered phenols of the structure presented hereinafter to the polymerization reaction at a point in time when a predetermined amount of monomer conversion has occurred.

Abstract: When vinyl pyridines including vinyl stilbazole materials and vinyl styrylpyridine oligomer materials are admixed with bismaleimides and cured to form copolymers the cure temperatures of the copolymers are substantially below the cure temperatures of the bismaleimides alone.

Abstract: Disclosed is a process for preparing water absorbing, cross-linked acrylate resins by aqueous polymerization of (A) acrylic acid neutarlized 70 to 100 mole percent for example with ammonia, and/or caustic alkali and/or an amine; with (B) acrylamide in a mole ratio of 70 to 100 mole percent (A) to 30:0 mole percent (B); and (C) a water miscible or a water soluble polyvinyl monomer in an amount of 0.001 to 0.3 weight percent based on the total weight of (A) and (B). In accordance with one embodiment of the invention, the concentration of monomers (A) plus (B) should be at least 70 percent by weight of the polymerization mixture of (A) plus (B) plus (C) to achieve a substantially dry polymer (less than 15 weight percent water) when polymerization is completed by utilizing the exothermic heat of polymerization and cross-linking to drive off water without the need for additional heating to obtain a dry solid.

Abstract: An ethylene copolymer comprising ethylene and a compound of formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group, and R.sup.2 represents a methyl group or an ethyl group, the content of the compound of formula (I) being from 0.005 to less than 10 mole %, and the copolymer being a random copolymer prepared by radical polymerization of ethylene and the compound of formula (I).

Abstract: The polymers of this invention contain recurring units of the structure ##STR1## wherein x is a cardinal number of from 2 to 8, and R.sub.f is perfluoroalkyl of 2-10 carbon atoms.

Abstract: Monoethylenically unsaturated copolymerizable monomers are disclosed which improve the adhesion of copolymers (especially those produced by aqueous emulsion copolymerization to provide latex paint). These monomers are the reaction product of one equivalent of a monoethylenically unsaturated compound which resists homopolymerization and which carries a single isocyanate-reactive hydrogen atom, such as 2-hydroxypropyl monobutyl maleate, one mole of an organic polyisocyanate, such as 2,4-toluene diisocyanate, and sufficient alkyl alkylene urea carrying a single isocyanate-reactive hydrogen atom on the alkyl group, such as 2-hydroxyethyl ethylene urea, to consume the remaining isocyanate functionality on the polyisocyanate. An improved method of producing these monomers from a mixture of all three reactants is also disclosed.

Abstract: A methyl methacrylate syrup composition comprises an intimate mixture of 1-99 parts by weight of a first polymer-in-monomer syrup (A) and 99-1 parts by weight of a second polymer-in-monomer syrup which can be either (B.sub.1) or (B.sub.2), wherein the syrups (A), (B.sub.1) and (B.sub.2) are as follows:(A) a polymer-in-monomer syrup obtained by copolymerizing a mixture of methyl methacrylate monomer, one or more monomers having reactivity with glycidyl groups and containing at least one ethylenically-unsaturated bond, and one or more of (meth)acrylates, styrene and styrene derivatives;(B.sub.1) a polymer-in-monomer syrup obtained by copolymerizing a mixture of one or more monomers containing at least one glycidyl group and at least one ethylenically-unsaturated bond, and one or more monomers selected from the group consisting of methyl methacrylate, (meth)acrylates, styrene and styrene derivatives;(B.sub.

Abstract: This invention relates to an optical material comprising a polymer which has a structural unit represented by the formula ##STR1## wherein X.sup.1 and X.sup.2 are the same or different and are each hydrogen or deuterium, and R.sup.1 is a chain hydrocarbon group having 1 to 5 carbon atoms, a cyclic hydrocarbon group (with or without a substituted lower alkyl group) having 3 to 6 carbon atoms or a deuterium-substituted chain hydrocarbon group having 1 to 5 carbon atoms in an amount of at least 5 mole % of the polymer.

Abstract: Dental resin systems prepared from polyfunctional or monofunctional highly-fluorinated methacrylate prepolymers are described. Preferred systems comprise (a) a major amount of a polyfluorinated aligomeric polyfunctional methacrylate such as (PFMA), preferably in combination with a diluent monomer such as 1,10-decamethylene dimethacrylate (DMDMA), methyl methacrylate (MMA), neopentyl dimethacrylate (NPDMA), 1,6-hexamethylene dimethacrylate (HMDMA), etc., or mixtures thereof; and (b) a minor amount of a polyfluorinated monofunctional methacrylate (PFMMA), such as 1,1-dihydropentadecafluorooctyl methacrylate (PDFOMA) as a minor or secondary diluent monomer in a non-hydroxylated bis-GMA resin system. The products are generally useful as hydrophobic dental materials, esepcially as composited (with fillers), sealants and cements.

Abstract: [2,5,8,11]-tetraalkyl-[2,5,8,11]-tetracyano-cis-6a' carboxy, 12a' oxoacide-3,4:9,10 bisdiazobicyclooctane compounds are disclosed. In one embodiment, the compounds are capable of initiating free radical polymerization and are well suited for the preparation of polymers having block type structures.

Abstract: A novel optically active polymer comprising structural elements of the formula: ##STR1## The polymer is applicable for the optical resolution of a racemic mixture through, for instance, column chromatography.

Abstract: Fully cured, intact, solid castings of bis(allyl carbonate) resin, e.g., diethylene glycol bis(allyl carbonate), are prepared by polymerizing the resin with between about 0.75 and about 1.50 parts, per hundred parts of resin, of a monoperoxycarbonate, e.g., tertiarybutylperoxy isopropyl carbonate. An adhesion reducing amount, e.g., between about 25 and about 75 parts, per million parts of resin, of a mold release agent is incorporated into the liquid resin monomer to avoid cracking of the casting. Use of a mold release agent is not required when the resin is prepolymerized to about 15-50 percent allylic utilization.

Abstract: A methanol-insoluble homopolymer of an .alpha.-trifluoromethylacrylate, which has either an alkyl group or a fluorine-containing alkyl group in the ester radical, is formed at good yields in an organic aprotic solvent by using an alkali metal alkoxide, e.g. lithium t-butoxide, as anionic polymerization catalyst.