Abstract: A polyvinyl chloride resin containing blended therein a hindered amine light stabilizer having the following structural formula (I): ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a lower alkyl group and R.sub.5 represents an alkylene or terminal acetyl group, in an amount of 0.01-5 parts by weight based on 100 parts by weight of a polyvinyl chloride resin.

Abstract: A polyvinyl chloride resin composition for powder molding, containing a dry blend of a polyvinyl chloride resin and a plasticizer, wherein the plasticizer is a mixed trimellitate of a mixture of compounds of the formula ##STR1## where R is an alkyl group, each of the compounds contains the same or different alkyl group in the same or different molecules, and the alkyl groups in the mixture have a straight chain ratio of at least 85 mol % and consist of 5 to 55 mol % of alkyl groups having at most seven carbon atoms, 45 to 95 mol % of alkyl groups having eight carbon atoms, and at most 10 mol % of alkyl groups having at least nine carbon atoms.

Abstract: A vinyl chloride plastisol composition comprises 100 parts by weight of a vinyl chloride paste resin and 35 to 180 parts by weight of a plasticizer the vinyl chloride paste resin having an average particle size of 0.5 to 10 microns, and being composed of 5 to 80% by weight of tetrahydrofuran-insoluble micro-gel fraction and 20 to 95% by weight of tetrahydrofuran-soluble fraction.

Abstract: An electroplating bath for depositing tin or a tin alloy with satisfactory brightness, which comprises a mother bath of a pH-value ranging from 4 to 8 and containing citric acid or its salt, an ammonium salt and a water-soluble polymer as a brightener. The bath may further comprise an aldehyde compound as a co-brightener.

Abstract: A method for stabilizing tin or tin alloy electroplating baths containing citric acid or its salt and an ammonium salt, by adding at least one saturated hydroxycarboxylic acid or its salt other than citric acid or citrate and/or at least one saturated dibasic carboxylic acid.

Abstract: A brightener additive for zinc electroplating baths, which comprises: a water-soluble polymer prepared by the reaction of an epihalohydrin with a nitrogen heterocyclic compound such as the compounds of imidazole, pyrrole, cyclic amine of the formula: ##EQU1## and piperazine in the presence of a nitrogen compound such as the compounds of aliphatic amines, hexamethylenetetramine and ammonia.

Abstract: A method for depositing bright zinc from zinc electrodeposition baths in which an aqueous solution of a low molecular weight polymer prepared by the reaction of at least one epihalohydrin with at least one nitrogen heterocyclic compound is added to the zinc electroplating bath.