Abstract: High molecular weight, linear aromatic polyesters having a very high degree of alternating microstructure are produced by reacting a hydroxyl-containing component with an excess of acid halide, recovering the bis adduct thus formed and thereafter polymerizing the bis adduct with additional hydroxy-containing components.

Abstract: Polymerizable molding compositions having excellent pigmentability and dimensional stability comprise:A. polymerizable polyester component andB. an additive component comprising discrete particles of less than about 50 microns diameter of a cross-linked acrylate polymer having a glass transition temperature of below about 75.degree. Celsius and which is chemically inert with respect to the polyester component and is swellable but insoluble therein. The additive component comprises the lightly cross-linked reaction product of at least one monofunctional acrylate monomer and at least one polyfunctional acrylate monomer.

Abstract: 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.

Abstract: Dimensionally stable, pigmentable polyester molding compositions comprise:A. polymerizable polyester component; andB. an additive component comprising discrete particles of less than about 50 microns diameter of a lightly cross-linked vinyl chloride polymer having a glass transition temperature of below about 100.degree. C and which is chemically inert with respect to the polyester component and is swellable but insoluble therein.The additive component is a vinyl chloride polymer or copolymer lightly cross-linked with a suitable polyfunctional monomer, such as a diacrylate.

Abstract: Impact resistant, corrosion resistant polymers are prepared from a polymerizble composition comprising (1) a vinyl monomer and (2) a prepolymer blend obtained by reacting a molar excess of organic diisocyanate with an hydroxyl terminated polydiene and subsequently reacting the product thereof with an hydroxyalkyl acrylate.

Abstract: Polymerizable polyester molding compositions having good shrinkage control comprise (1) a polymerizable polyester, and (2) a low profile additive comprising the reaction product of a styrene-maleic anhydride copolymer and a polydiene having terminal hydroxyl groups.

Abstract: Polymerizable polyester compositions are provided containing a styrene-maleic anhydride copolymer reacted with a hydroxyl terminated saturated polyester. Such compositions have good thickening response and are free from tackiness in the uncured state, and upon curing have good shrinkage control and improved surface smoothness. The compositions are useful as bulk molding compounds or sheet molding compounds.

Abstract: A polymeric composition containing more than 5% halogen can be improved in heat and light stability by the incorporation therein of small amounts of a novel stabilizer which is the metallic salt of the reaction product of an alpha-olefin with maleic anhydride.The stabilizers of the invention can be used either alone or in combination with conventional stabilizers for halogen containing polymeric materials.

Abstract: 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.

Abstract: An improved bulk polymerization of vinyl halide is disclosed wherein reactor scale formation is substantially reduced by polymerizing in a single or two stage bulk process a vinyl halide monomer containing up to 50% of a comonomer in contact with a combination of a polyolefin, water, and an inert fine particle size additive which is a solid at the reaction temperature, or water and said additive, optionally in the presence of a surface active agent. Compositions produced by the process of the invention are useful in making films, coated fabrics and molded objects.

Abstract: A sealant system comprising as a first component a mercaptan-terminated polythioether of the formulaHS[ (RS).sub.n R.sup.1 S].sub.m (RS).sub.n Hwhere R is propylene or trimethylene or mixtures thereof, R.sup.1 may be propylene or mixture of propylene and a substituted cyclohexane radical of the formula ##STR1## wherein the substituted cyclohexane radical is present at about 0.1 to about 3 mole percent of the total moles of R, n is 1 to about 10 and m is 1 to about 200; a filler such as calcium carbonate; a plasticizer selected from the group consisting of chlorinated methylstearate or a phthalate ester or mixtures thereof; an adhesion additive selected from gamma-mercaptopropyltrimethoxysilane and gamma-glycidoxypropyltrimethoxysilane; and a cure accelerator, selected from the group, tetraethylthiuram disulfide, tetramethylthiuram disulfide, para-quinone dioxime, and tri(dimethylamino)phenol and mixtures thereof, and as a second component, manganese dioxide or lead dioxide.

Abstract: Highly fire retardant unsaturated polyester resins which exhibit low burning rates, low smoke generation and beneficial char formation in the presence of a flame are provided by incorporating up to about 5 weight percent of iron or an iron compound in a halogen containing unsaturated polyester of a polycarboxylic compound and a polyhydric alcohol having greater than about 4 weight percent halogen based on the weight of unsaturated polyester resin and a copolymerizable unsaturated monomer. The unsaturated polyester resins are copolymerized with an unsaturated monomer for use in castings, laminated products and other reinforced articles.

Abstract: An improved polyvinyl chloride or polyvinyl chloride copolymer containing up to 50 percent of a monomer can be obtained by graft polymerizing in contact with an olefin-acrylic ester copolymer in a process of bulk polymerization comprising single stage or two-stage polymerization wherein high speed agitation is used during the first stage and low speed agitation is used in the second stage. By polymerizing in the presence of an olefin-acrylic ester copolymer, reduced particle size, easy processability, lower melt viscosity and improved impact strength can be obtained in the resin product. Two stage bulk polymerization in contact with small amounts of the olefin-acrylic ester copolymer is effective in providing reduced particle size. Larger amounts of olefin-acrylic ester copolymer can be used in either a two-stage or single stage polymerization process where high impact strength, reduced melt viscosity, improved clarity and easy processability properties are desired in the final product.

Abstract: Polymers of excellent impact strength, reduced particle size, and enhanced proportions of fines are obtained in the bulk polymerization of a vinyl halide or mixture thereof with comonomer(s) in the presence of high molecular weight polyolefins by removing from the polymerization mass during the thick paste state thereof sufficient vinyl halide to adjust the effective concentration of polyolefin to above about 5.3% based on vinyl halide. The resultant product which contains an enhanced proportion of fines and is devoid of massive agglomerates, requires less mechanical work in comminution or shorter heating in melting in subsequent conventional processing steps.

Abstract: Rubber cement compositions which consist of rubbers and multi- (three and more) functional phenol-aldehyde modified bifunctional phenol resins, which are made by first obtaining the bifunctional phenolic resin by condensing 1 mole of bifunctional phenol with 0.5 to 3.0 moles of aldehydes in the presence of an alkaline catalyst, and then co-condensing 0.05 to 2.5 moles of multifunctional (three and more) phenols against 1 mol of the bifunctional phenols in the above-mentioned resin in the presence of an acidic catalyst, said co-condensed resin having a number average molecular weight of 700 - 1900, a resin melting point of 80.degree. -160.degree. C, being curable and also being soluble in aromatic hydrocarbon solvents.

Abstract: An easy processing polyvinyl halide polymer can be made by a process of reacting a vinyl ester and maleic anhydride with said vinyl halide polymer to produce a branched chain graft copolymer in which the monomeric vinyl ester and maleic anhydride are graft copolymerized onto the polyvinyl chloride backbone. Such a reaction can take place during processing of the polyvinyl chloride homopolymer on such equipment as Banbury mixers, injection molders, extruders and two-roll mills. The process is readily accomplished generally involving no more than the usual processing time involved to incorporate fillers, plasticizers and stabilizers into the polyvinyl halide homopolymer. The products of the invention are more readily processable without decomposition by thermal means and can be cross-linked into rigid products by the reaction of the grafted anhydride group in the product with such cross-linking agents as polyfunctional alcohols, amines, epoxides, and isocyanates.

Abstract: High impact thermoplastic polymers such as the styrenic based polymers, ABS and high impact polystyrene, are rendered fire retardant by the incorporation in the polymer of a mixture of a diadduct of hexahalocyclopentadiene and decabromodiphenyl oxide. The fire retardance of the compositions can be further enhanced by the incorporation therein of a metallic compound, particularly a compound of aluminum, zinc, arsenic, antimony or bismuth. A preferred metallic compound is antimony oxide.

Abstract: Ultra high purity hexachlorocyclopentadiene is obtained by a two-stage distillation procedure, in the first stage of which crude hexachlorocyclopentadiene is distilled to separate hexachlorobutadiene as a distillate and in the second stage, ultra high purity hexachlorocyclopentadiene is obtained as a distillate fraction and octachlorocyclopentene is obtained as a distillation residue.

Abstract: An improved process is disclosed for production of sulfhydryl-terminated compounds by reaction of an allene and hydrogen sulfide initiated with ultraviolet light of wavelength above about 2600 Angstroms to obtain a colorless product of improved purity. The invention also includes the polymerization of an unsaturated hydrocarbon with the sulfhydryl-terminated product to prepare a sulhydryl-terminated polythioether. These compounds are useful as chemical intermediates and precursors of elastomeric sealants, such as architectural sealants.

Abstract: An improved process for production of sulfhydryl-terminated compounds by reaction of an allene compound and hydrogen sulfide is disclosed wherein the reaction is carried out in the presence of ultraviolet light of wavelength substantially above 2600 Angstroms and of an organic photosensitizing reagent to obtain a substantially colorless product of improved purity at an increased reaction rate. The invention also includes polymerization of the crude sulfhydryl-terminated product with an unsaturated compound to prepare sulfhydryl-terminated polythioethers which are useful as chemical intermediates and precursors of elastomeric sealants, such as architectural sealants.