Hooker Chemicals & Plastics Corporation

Anthony L Lemper

Victor A Pattison

Jerold C Rosenfeld

Joseph A Pawlak

Gilbert Witschard

George C Hopkins

Henry Kahn

Jack L Nickels

David W Eastman

An improved polyvinyl halide or a polyvinyl halide copolymer containing up to 50 percent of a comonomer can be obtained by post polymerizing in a single stage or two-stage bulk process in contact with a base polymer, the same or different monomer as the monomer used to form the base polymer. Compositions produced by the process of the invention are useful in making films, coated fabrics and molded objects. The liquid phase post polymerization process of the invention is applicable to base polymers in powder form prepared by emulsion, suspension and bulk polymerization processes. The base polymer can be present in a polymerization mixture in which only a partial amount of monomer has been converted to base polymer such as in a two-stage polymerization process or the base polymer can be used in dry, solid form. Polymers of the invention have improved bulk density and reduced plasticizer uptake and can be used to prepare fabric coatings. Copolymers prepared by the novel post-polymerization process of the invention which show increased impact strength in addition to improved bulk density and reduced plasticizer uptake are useful in the preparation of molding compounds. In the bulk polymerization process of the invention, the addition of the same monomer or monomers or a different monomer or monomers subsequent to the partial conversion by a two-stage bulk process of polymerization of the vinyl halide monomer or monomers or vinyl halide monomer and comonomer, results in higher yield than can be obtained in the same reaction vessel as compred with a usual two-stage bulk polymerization process. In the two-stage bulk polymerization process of the invention, the use of small amounts of a hydrocarbon rubber dissolved or dispersed in the monomer effectively prevents reactor fouling during polymerization. Where desired, a small particle size product can be obtained by incorporating in the first stage of a two-stage bulk polymerization process either an inert finely divided additive, a surfactant, a mixture thereof, or a polyolefin.

Post bulk polymerization process for polyvinyl halide and composition

Linear aromatic polyesters are produced by the melt polymerization process by mixing a bisphenol, a diaryl ester of a dicarboxylic acid and an oligomeric polyester comprised of an aliphatic glycol and a dicarboxylic acid and reacting the mixture in the presence of a transesterification catalyst.

Melt polymerization process and linear aromatic polyesters prepared

An improved polyvinyl halide or a vinyl halide copolymer containing up to 50 percent of a comonomer can be obtained by post polymerizing in a single stage or two-stage bulk process in contact with a base polymer, the same or different monomer as the monomer used to form the base polymer. Compositions produced by the process of the invention are useful in making films, coated fabrics and molded objects. The liquid phase post polymerization process of the invention is applicable to base polymers in powder form prepared by emulsion, suspension and bulk polymerization processes. The base polymer can be present in a polymerization mixture in which only a partial amount of monomer has been converted to base polymer such as in a two-stage polymerization process or the base polymer can be used in dry, solid form. Polymers of the invention have improved bulk density and reduced plasticizer uptake and can be used to prepare fabric coatings. Copolymers prepared by the novel post-polymerization process of the invention which show increased impact strength in addition to improved bulk density and reduced plasticizer uptake are useful in the preparation of molding compounds. In the bulk polymerization process of the invention, the addition of the same monomer or monomers or a different monomer or monomers subsequent to the partial conversion by a two-stage bulk process of polymerization of the vinyl halide monomer or monomers or vinyl halide monomer and comonomer, results in higher yield than can be obtained in the same reaction vessel as compared with a usual two-stage bulk polymerization process. In the two-stage bulk polymerization process of the invention, optional addition of small amounts of a hydrocarbon rubber dissolved or dispersed in the monomer to the second reaction stage effectively prevents reactor fouling during polymerization. Optional second stage addition of a small amount of a surfactant beneficially diminishes the porosity of the polymer product. A small particle size product can be obtained by incorporating in the first stage of a two-stage bulk polymerization process either an inert finely divided additive, a surfactant, a mixture thereof, or a polyolefin.

An aromatic polyester of an aromatic dicarboxylic acid and halogenated bisphenol having a glass transition point above about 175.degree. C is employed as a non-blooming fire retardant additive for polymer compositions.

Non-blooming halogen-containing additives for plastics

High molecular weight, linear aromatic polyesters having an ordered microstructure are produced in an improved solution polycondensation process in which the hydroxyl component is added to the acid halide.

Microstructured high molecular weight-low viscosity polyester polymers

High molecular weight, linear aromatic polyesters are produced in an improved solution polycondensation process in which the hydroxyl component is added to the acid halide.

Solution polycondensation method

In a process of bulk vinyl chloride polymerization involving a two stage stationary reaction zone polymerization wherein high speed agitation is used during the first stage and slow speed agitation is used in the second stage, the polymerization in the first stage is conducted in contact with an organic or inorganic, inert, fine particle size material, solid at least at reaction temperatures and insoluble in the monomer or monomers used, or an anionic, cationic, or nonionic surfactant, or mixtures thereof. By the present polymerization method using economical conventional agitation equipment, small particle size polyvinyl chloride homopolymers or copolymers are produced which are useful as extender resins in plastisols.

Method of obtaining small particle size polymers and copolymers of vinyl

Polyvinyl chloride and polyvinyl chloride containing up to 20 percent of a comonomer can be obtained in the form of small particle size spherical glassy surface particles by a process of bulk polymerization of monomer or monomers comprising two stage polymerization wherein high shear agitation is used during the first stage and low shear agitation is used in the second stage. To obtain a reduction in particle size, the polymerization in the first stage is conducted in contact with at least one of (A) an additive comprising an organic or inorganic, inert, fine particle size material solid at least at reaction temperatures, and insoluble in said monomer or monomers used, and (B) a cationic, anionic, or non-ionic surface active agent. A portion of the polymerization in a second stage reaction is conducted at temperature and pressure sufficient to render the surface of the individual particles or agglomerates glassy and fused. The resulting polymers and copolymers produced have superior plastisol viscosity stability and fusion characteristics and excellent powder flow properties as compared to those of the prior art.

Growing community of inventors

Tonawanda, NY, United States of America

Anthony L Lemper