Pigmentable low shrink thermosetting polyesters

Details Pigmentable low shrink thermosetting polyesters Pigmentable low shrink thermosetting polyesters

1975-11-10

1977-09-13

Seccuro, Carman J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 40R, 260861, 260873, C08L 6706

Patent

active

040482570

ABSTRACT:
This invention pertains to a pigmentable, low-shrink molding composition based on thermosetting, unsaturated polyester resin in combination with lightly cross-linked polymer particles. The lightly cross-linked polymer particles have a particle size preferably between about 20 microns to 50 microns and can be selected from lightly cross-linked condensation polymers and lightly cross-linked addition polymers. In a preferred aspect of the invention the lightly cross-linked polymer particles contain minor amounts of pendant reactive groups selected from amino and oxirane groups to produce a one-pack stabilized low-shrink molding resin mixture. The pigmentable, low-shrink molding compositions are stabilized dispersions containing pigments dispersed therein in conjunction with thermosetting polyester polymer, monomer, and lightly cross-linked polymer particles as well as fillers to provide a pigmentable low-shrink molding composition which cures to uniformly pigmented low-profiled molded part.

REFERENCES:
patent: 2694700 (1954-11-01), Shanta
patent: 3081278 (1963-03-01), Wohnsiedler
patent: 3267176 (1966-08-01), Mahlman
patent: 3488745 (1970-01-01), Wright
patent: 3668278 (1972-06-01), Bonvicini et al.
patent: 3865904 (1975-02-01), Wingler et al.
patent: 3883612 (1975-05-01), Pratt et al.

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