Abstract: The present invention provides hardenable fluoridated copolymers that are prepared by (a) copolymerizing tetrafluoroethylene, vinylidene fluoride, and an allylic monomer of the formula ##STR1## wherein R is an unsaturated linear, branched, or cyclic alkyl chain having 2 to 12 carbon atoms, each of R1, R2, R3, and R4 is independently selected from the group consisting of H, CH.sub.3, CH.sub.2 CH.sub.3, OH, and CH.sub.2 OH, n is 0 or 1, and p is a value from 0 to 3, in the presence of a copolymerization initiator and in a solvent medium, and subsequently (b) extracting the copolymer from the reaction medium by precipitation in a liquid that is not a solvent of the copolymer but is miscible with the solvent of the reaction medium. The fluoridated copolymers so prepared are useful in powder form for electrostatic spray coating applications.

Abstract: Tetrafluoroethylene-perfluorovinylether copolymer having a specific melt viscosity of 30.times.10.sup.4 to 200.times.10.sup.4 poises at 372.degree. C., which comprises 99% to 90% by weight of tetrafluoroethylene and 1% to 10% by weight of perfluoro(ethyl vinyl ether) can produce a film or sheet having good resistance to flex fatigue by molding.

Abstract: Copolymerizable oxime ethers of the general formula ##STR1## where A is a divalent link, R.sup.1 may be hydrogen or C.sub.1 -C.sub.4 -alkyl and R.sup.2 and R.sup.3 independently of one another are each hydrogen or C.sub.1 -C.sub.10 -alkyl, C.sub.1 -C.sub.10 -alkoxy, C.sub.5 -C.sub.10 -cycloalkyl or C.sub.5 -C.sub.10 -aryl, each of which may furthermore contain 1-3 nonadjacent nitrogen, oxygen or sulfur atoms as hetero atoms in the carbon chain or in the carbon ring and may be substituted by C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy groups, R.sup.2 or R.sup.3 may each be hydrogen or R.sup.2 and R.sup.3 together form a bridge of 3 to 14 carbon atoms, where some of the carbon atoms may also be part of an aromatic ring.

Abstract: The present invention provides an efficient aqueous polymerization process of 6 hours or less for preparing water soluble polymer products formed from 50 to 100 weight percent of one or more monoethylenically unsaturated dicarboxylic acid monomers and 0 to 50 weight percent of one or more optional other water soluble monoethylenically unsaturated monomers. In this process, 1) an aqueous reaction mixture of dicarboxylic acid monomer is formed, 2) from about 0.9 to about 2.1 equivalent moles of base are added to the reaction mixture per mole dicarboxylic acid monomer, 3) at least one metal promoter is added to the reaction mixture, 4) one or more initiators and optional other water soluble monoethylenically unsaturated monomer are fed to the reaction mixture, 5) the weight percent reaction solids during the polymerization is between about 40 and about 65 weight percent, and 6) the reaction temperature is maintained at about 80.degree. C. to about 140.degree. C.

Abstract: Organophosphonic polymers of general formula (I) where Y is a methyl or ethyl group or hydrogen and Z is hydrogen, the ammonium group, an alcaline metal or an alcaline earth metal. A method for producing these polymers comprises three stages: production of a monomer by reacting a ketene with diethylphosphite in the presence of an acid catalyst; polymerization of the monomer in solution in a solvent by means of a free radical initiator; hydrolysis of the polymer obtained by means of a concentrated solution of inorganic or inorganic based acid. Aqueous solution of hydrogen peroxyde stabilized by means of said polymers.

Abstract: Copolymers of aryl phosphonic acids can be made in a bulk polymerization process with unsaturated monomeric hydrocarbons. Preferred are alpha-phenyl vinyl phosphonic acid and styrene. Bulk polymerization process avoids suspending agents, emulsifying agents or water. Absence of halogen avoids environmental problems. A free radical initiator is required.

Abstract: Polymers are disclosed which comprise:(A) about 1-99.9 weight percent of one or more alpha, beta-monoethylenically unsaturated carboxylic acids, typically methacrylic acids;(B) about 0-98.9 weight percent of one or more monoethylenically unsaturated monomers, typically ethyl acrylate;(C) about 0.1-99 weight percent of one or more monoethylenically unsaturated macromonomers, and(D) about 0-20 weight percent or greater of one or more polyethylenically unsaturated monomers. These polymers can be solubilized in water with the aid of an alkali, like ammonium hydroxide. When the polymers are added to latex paints and neutralized, the viscosity of the paint is increased, brush drag is increased, and the paint rheology is otherwise improved.

Abstract: Disclosed herein is a partially fluorinated polymer containing cyclic units. The polymer is particularly useful in for coatings and encapsulants. Also disclosed herein is the novel monomer from which the polymer is made, and a novel intermediate for that monomer.

Abstract: Electrophoresis support media which include one or more polymers made from hydroxy alkyl esters of acrylic or methylacrylic acid or poly (alkylene glycol) esters of acrylic or methacrylic acid. These acrylic or methacrylic monomers are polymerized or copolymerized to form electrophoresis support media which can be used in place of polyacrylamide gels, agar gels and agarose gels. The acrylic or methacrylic ester monomers may be cross-linked with various cross-linking agents to provide electrophoresis support media with a wide range of pore sizes and physical strength. The electrophoresis support media is well-suited for use with organic solvents.

Abstract: The present invention provides a method for fabricating an asymmetric fluoropolymer membrane comprised of a fluoropolymer material, the membrane having a first surface comprised of a dense layer of the fluoropolymer material, and an opposite second surface comprised of a porous layer of the fluoropolymer material, comprising the steps of:(a) dissolving a fluoropolymer material in a solvent to form a solution;(b) depositing the solution on a casting surface; and(c) removing the solvent from the solution, thereby precipitating the membrane therefrom.The present invention also provides asymmetric fluoropolymer membranes comprised of a fluoropolymer material, wherein the membrane has a first surface comprised of a dense layer of the fluoropolymer material, and an opposite second surface comprised of a porous layer of the fluoropolymer material, and provides compositions for making the same.

Abstract: Fluoroalkyl sulfinates were synthesized and used as a source of fluoroalkyl radicals in aqueous emulsion polymerization. The resulting polymers contained a high level of perfluoroalkyl end groups. When fluoroalkyl disulfinates were utilized, the fluoroalkyl moiety and was incorporated in the polymer backbone. These disulfinates act as monomers, yielding fluoropolymers with specific micro structural fragments, derived from the parent perfluoro disulfinate. Novel fluoropolymers can thus be prepared.

Abstract: The present invention relates to a process for preparing acrylic polymers by means of aqueous suspension polymerization in the presence of 0.05-1% by weight, calculated on the suspension, of a stabilizer consisting of a polymer prepared by polymerization of: 60-100% by weight of a salt of a sulphoacrylamide of general formula: ##STR1## 0-40% by weight of at least an acrylic monomer.

Abstract: Polymers are disclosed which comprise:(A) about 1-99.9 weight percent of one or more alpha, beta-monoethylenically unsaturated carboxylic acids, typically methacrylic acids;(B) about 0-98.9 weight percent of one or more monoethylenically unsaturated monomers, typically ethyl acrylate;(C) about 0.1-99 weight percent of one or more monoethylenically unsaturated macromonomers, and(D) about 0-20 weight percent or greater of one or more polyethylenically unsaturated monomers. These polymers can be solubilized in water with the aid of an alkali, like ammonium hydroxide. When the polymers are added to latex paints and neutralized, the viscosity of the paint is increased, brush drag is increased, and the paint rheology is otherwise improved.

Abstract: A method for the production of poly(vinyl trifluoroacetate) and copolymers thereof with vinyl esters is described. Poly(vinyl trifiuoroacetate) (PVTFA) is obtained in essentially quantitative yield under mild conditions by using non-chlorofluorocarbon solvents comprising siloxanes or perfluorinated fluids. Hexamethyl disiloxane is a particularly useful example of such solvents. Synthesis of syndiotactic PVTFA on a commercial scale without the use of environmentally-harmful solvents is made possible by the invention, which provides a convenient commercial route to syndiotactic polyvinyl alcohol.

Abstract: Polymers of itaconic acid are formed at high conversion by an aqueous polymerization process of partially neutralized monomer solution, water, polyvalent metal ion and initiator.Polymers produced according to the process of the invention are useful as detergent additives, scale inhibitors and removers, sequestrants, yarn sizers, deflocculating agents, de-inking agents, suspending agents and dispersing agents.

Abstract: An emulsion polymerization process for making a low molecular weight alkali-soluble copolymer of a water insoluble monoethylenically unsaturated aromatic monomer and methacrylic acid, includes heating an aqueous reaction mixture, said reaction mixture having a pH of less than or equal to about 4.5 and including from about 25 parts by weight to about 75 parts by weight of the water insoluble monoethylenically unsaturated aromatic monomer; from about 25 parts by weight to about 75 parts by weight methacrylic acid; a polymerization initiator; a reducing agent; a catalyst effective for promoting decomposition of the polymerization initiator in the presence of the reducing agent; and an amount of a chain transfer agent effective to limit copolymer weight average molecular weight to a range of about 2,000 to about 40,000; to a temperature greater than or equal to about 75.degree. C.; and maintaining the reaction mixture at a temperature greater than or equal to about 75.degree. C.

Abstract: Compounds of formula (I) ##STR1## wherein R.sub.1 is hydrogen, methyl or halogen, n is 2 or 3, and R is C.sub.1 -C.sub.6 alkyl, benzyl, 2-tetrahydrofuranyl, 2-tetrahydropyranyl, C.sub.1 -C.sub.6 alkoxycarbonyl, phenoxycarbonyl or benzyloxycarbonyl, or, if two substituents OR are ortho-positioned to each other, two substituents R together form an ethylene group which may be substituted by up to four C.sub.1 -C.sub.6 alkyl groups, or form a C.sub.2 -C.sub.6 alkylidene group, can be polymerized in the absence or presence of other unsaturated comonomers to polymers having a molecular weight M.sub.w of 10.sup.3 to 10.sup.6 and which are suitable for producing positive photoresists with high resolution and very good contrast.

Abstract: The present invention relates to a polymer resulting from the copolymerization of at least three monomers. From about 40 to 84 weight percent of the polymer is derived from a conjugated diolefin, from about 15 to 50 weight percent of the polymer is derived from a vinyl substituted aromatic compound and from about 1 to 8 weight percent of the polymer is derived from an olefinically unsaturated nitrile. These polymers may be added to a tread rubber stock for improved wet traction and improved abrasion resistance.

Abstract: A transparent thermoplastic molding compound consisting of 40 to 90% by weight of units derived from tetrafluoroethylene, and 60 to 10% by weight of units derived from compounds of formula I or II:CF.sub.2 .dbd.CF--O--(CF.sub.2 --CF(CF.sub.3)--O).sub.m --(CF.sub.2).sub.n --CF.sub.3 (I)CF.sub.2 .dbd.CF--O--(CF.sub.2 --CF(CF.sub.3)--O).sub.p --(CF.sub.2).sub.q --COO--R (II)is particularly suitable for manufacturing the sheath of beam waveguides whose core has a higher transparency than polymethyl methacrylate.

Abstract: The invention relates to novel methylene bisphosphonic acid derivatives carrying a styrene group attached to the methylene carbon. The novel compounds are useful e.g. for functionalizing polymers of styrene type, especially macroporous styrene polymers, by copolymerizing the novel derivative with styrene and optional crosslinking agents. The invention also provides for new crosslinking agents especially suitable for the said purpose.