Low-shrink thermosetting polyesters

Details Low-shrink thermosetting polyesters Low-shrink thermosetting polyesters

1975-10-17

1977-07-12

Lieberman, Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 775AN, 260858, C08L 7500

Patent

active

040354393

ABSTRACT:
This invention pertains to a one component low-shrink molding composition comprising a linear polyurethane thermoplastic in combination with preferably a dicyclopentadiene modified thermosetting polyester resin and a coreactive vinyl monomer. The low-shrink molding resin composition of this invention is a stabilized one-component uniform mixture wherein the linear polyurethane polymer is dispersed within the dicyclopentadiene polyester resin (polyester polymer + vinyl monomer) to provide a uniform dispersion. The linear polyurethane thermoplastic polymers are prepared from polycaprolactones containing polyether and polyesters reacted with diisocyanates. The linear polyurethanes contain carboxyl groups whereby the low-shrink molding resin composition can be thickened with alkyline earth and/or hydroxide thickeners for producing low-profile molded parts.

REFERENCES:
patent: 3051687 (1962-08-01), Young
patent: 3169945 (1965-02-01), Hostettler
patent: 3448172 (1969-06-01), Damusis
patent: 3578728 (1971-03-01), Ehrhart
patent: 3700752 (1972-10-01), Hutchinson
patent: 3868431 (1975-02-01), Hutchinson
patent: 3883612 (1975-05-01), Pratt
patent: 3886229 (1975-05-01), Hutchinson

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