Thioester polymerization modifiers

Details Thioester polymerization modifiers Thioester polymerization modifiers

1992-12-29

1994-02-15

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ethylenically unsaturated reactant admixed with either...

525 43, 525437, 525438, 525445, 525451, 524303, C08G 6391

Patent

active

052867889

ABSTRACT:
A composition and method for the polymerization of polymerizable resins which undergo exothermic polymerization, including unsaturated polyester resins, vinyl ester resins and mixtures thereof, and the polymerized product thereof, wherein an ester of a thiocarboxylic acid is present in a effective amount to substantially reduce the exothermic heat generated during polymerization of the resin, but insufficient to substantially affect the degree or rate of polymerization of the resin. The preferred thioester has the formula ##STR1## in which Z is an alkyl having 1-18 carbon atoms or ##STR2## a is 1 or 2, b is a whole number from 1 to about 5, n is a whole number from zero to b, and R is an alkyl or hydroxyalkyl having 1-18 carbon atoms and zero to 2 hydroxyl groups, alkyloxyethyl, alkyloxyethoxyethyl, and alkyloxypolyethoxyethyl having 1 to about 30 carbon atoms in the alkyl group; or when n is zero and z is alkyl, R is ##STR3## in which Y is an alkylene group having 2 to about 20 carbon atoms or an alkylene group interrupted at intervals of 2 or more carbon atoms by oxygen atoms and having 4 to about 40 carbon atoms and one to 19 oxygen atoms. Preferred specific thioesters include ditridecyl thiodipropionate, dimethyl thiodipropionate, and dimethyl dithiodipropionate.

REFERENCES:
patent: 2519755 (1950-08-01), Gribbins
patent: 3567076 (1971-02-01), Kauder
patent: 3773723 (1973-11-01), Cole
patent: 4321191 (1982-03-01), Minagawa et al.
Chemical Abstracts 66:38447b.
Chemical Abstracts 71:125186n.
Chemical Abstracts 71:102582z.
Chemical Abstracts 77:36011h.
Chemical Abstracts 77:90159a.
Chemical Abstracts 77:115456k.
Chemical Abstracts 83:79735p.
Chemical Abstracts 84:32028r.
Chemical Abstracts 88:171181f.
Chemical Abstracts 90:123261b.
Chemical Abstracts 93:27368h.
Chemical Abstracts 96:218805v.
Chemical Abstracts 108:23447p.
Chemical Abstracts 109:150673e.

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