Abstract: Drier systems for surface-coating compositions that contain oxidizable, organic, film-forming resinous vehicles and that air dry in 24 hours or less at temperatures not higher than 50.degree. F. and at relative humidities above 50% comprise metal salt solutions in an inert solvent that contain an active drier metal, such as cobalt, and an auxiliary drier metal that comprises bismuth.

Abstract: A thickening agent for unsaturated polyester resin compositions comprises(a) 25% to 70% by weight of a Group II-A metal oxide or hydroxide and(b) 30% to 75% by weight of an unsaturated polyester vehicle comprising an unsaturated polyester that is the product of the reaction of a dicarboxylic acid component that contains at least one unsaturated aliphatic dicarboxylic acid and at least one saturated aromatic dicarboxylic acid with an alcohol component that contains at least one glycol and at least one monohydric alcohol.

Abstract: An unsaturated polyester resin composition comprises an unsaturated polyester resin, an unsaturated monomer capable of reacting with the unsaturated polyester to form cross-linkages, and a colorant-thickener dispersion that comprises (a) 20% to 50% by weight of a thickener comprising a Group II-A metal oxide or hydroxide, 5% to 20% by weight of a pigment component, and 30% to 75% by weight of an unsaturated polyester vehicle that comprises 80% to 98% by weight of at least one unsaturated polyester that is the product of the reaction of a dicarboxylic acid component containing 80 to 90 mole % of at least one unsaturated aliphatic dicarboxylic acid having 4 to 8 carbon atoms and 10 to 20 mole % of at least one saturated aromatic dicarboxylic acid with an alcohol component containing 40 to 60 mole % of at least one glycol having 2 to 6 carbon atoms and 40 to 60 mole % of at least one monohydric alcohol having 6 to 12 carbon atoms, in the amount of 0.4 mole to 0.

Abstract: A polyester resin composition comprises(a) an unsaturated polyester resin,(b) an unsaturated monomer capable of reacting with the unsaturated polyester resin to form cross-linkages, and(c) a thickening agent that comprises(1) 25% to 70% by weight of a Group II-A metal oside or hydroxide and(2) 30% to 75% by weight of an unsaturated polyester vehicle comprising an unsaturated polyester that is the product of the reaction of a dicarboxylic acid component that contains at least one unsaturated aliphatic dicarboxylic acid and at least one saturated aromatic dicarboxylic acid with an alcohol component that contains at least one glycol and at least one monohydric alcohol.

Abstract: A colorant-thickener dispersion for unsaturated polyester resin compositions comprises(a) 20% to 50% by weight of a thickener comprising a Group II-A metal oxide or hydroxide,(b) 5% to 20% by weight of a pigment component, and(c) 30% to 75% by weight of an unsaturated polyester vehicle that comprises(1) 50% to 100% by weight of at least one unsaturated polyester that is the product of the reaction of a dicarboxylic acid component containing 80 to 90 mole % of at least one unsaturated aliphatic dicarboxylic acid having 4 to 8 carbon atoms and 10 to 20 mole % of at least one saturated aromatic dicarboxylic acid with an alcohol component containing 40 to 60 mole % of at least one glycol having 2 to 6 carbon atoms and 40 to 60 mole % of at least one monohydric alcohol having 6 to 12 carbon atoms, in the amount of 0.4 mole to 0.

Abstract: A thickening agent for unsaturated polyester resin compositions comprises(a) 25% to 70% by weight of a Group II-A metal oxide or hydroxide and(b) 30% to 75% by weight of an unsaturated polyester vehicle comprising(1) 50% to 100% by weight of an unsaturated polyester that is the product of the reaction of a dicarboxylic acid component that contains at least one unsaturated aliphatic dicarboxylic acid and at least one saturated aromatic dicarboxylic acid with an alcohol component that contains at least one glycol and at least one monohydric alcohol and(2) 0-50% by weight of an unsaturated monomer capable of reacting with the unsaturated polymer to form cross-linkages.

Abstract: A thickening agent for unsaturated polyester resin compositions comprises(a) 25% to 70% by weight of a Group II-A metal oxide or hydroxide and(b) 30% to 75% by weight of an unsaturated polyester vehicle comprising(1) 50% to 100% by weight of an unsaturated polyester that is the product of the reaction of a dicarboxylic acid component that contains at least one unsaturated aliphatic dicarboxylic acid and at least one saturated aromatic dicarboxlyic acid with an alcohol component that contains at least one glycol and at least one monohydric alcohol and(2) 0-50% by weight of an unsaturated monomer capable of reacting with the unsaturated polyer to form cross-linkages.

Abstract: Vinyl chloride is removed from aqueous slurries prepared by the suspension polymerization of a monomer component that comprises vinyl chloride by heating the slurries at a temperature between 70.degree. C. and the boiling point of water at a pressure in the range of 30 mm Hg absolute to 3 atmospheres and removing the evolved vinyl chloride until the aqueous slurry contains less than 50 ppm and preferably less than 0.1 ppm of vinyl chloride, based on the weight of polymer in the slurry. The polymers that are recovered from the purified aqueous slurries contain less than 10 ppm, and in most cases less than 0.1 ppm of vinyl chloride.

Abstract: A colored rigid thermoplastic resin composition is prepared by incorporating in a rigid thermoplastic resin composition a non-plasticizing liquid pigment dispersion that contains(a) 5% to 80% by weight of at least one pigment, and(b) 20% to 95% by weight of an unsaturated polyester vehicle that comprises(1) 50% to 100% by weight of an unsaturated polyester that is the product of the reaction of a dicarboxylic acid component that contains 80-90 mole percent of an unsaturated aliphatic dicarboxylic acid having 4 to 8 carbon atoms and 10-20 mole percent of a saturated aromatic dicarboxylic acid and an alcohol component that contains 40-60 mole percent of a glycol having 2 to 6 carbon atoms and 40-60 mole percent of a monohydric alcohol having 6 to 12 carbon atoms, in the amount of 0.4-0.6 mole of the dicarboxylic acid component per mole of the alcohol component, and(2) 0 to 50% by weight of an unsaturated monomer capable of reacting with the unsaturated polyester to form cross-linkages.

Abstract: The discoloration of polyvinyl chloride that usually occurs when a slurry containing this polymer is heated at a temperature above 70.degree. C. to reduce its monomer content to less than 10 ppm is minimized or prevented by carrying out the heating step in the presence of an oxidizing agent.

Abstract: Vinyl chloride is removed from a slurry or latex that contains from 100 to 15,000 parts per million of vinyl chloride and 5% to 50% by weight of a vinyl chloride polymer by adding to the slurry or latex from about 0.5% to 20% of its weight of a compound selected from the group consisting of vinyl acetate, methylene chloride, di-tert.butyl-p-cresol, and mixtures thereof, maintaining the resulting mixture at a temperature between 25.degree. C. and 125.degree. C. under vacuum, and removing the vinyl chloride vapor that is evolved until the slurry or latex contains not more than 50 ppm of vinyl chloride.