Polymeric compositions and composites prepared from spiroortho-c

Details Polymeric compositions and composites prepared from spiroortho-c Polymeric compositions and composites prepared from spiroortho-c

1993-07-01

1996-09-17

Wilson, D. R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523427, 523466, 528106, A61K 6087, C08K 336, C08L 6300

Patent

active

055568963

ABSTRACT:
Copolymer compositions are provided, including those which undergo less than .+-.1.0% bulk polymerization shrinkage and are useful as strain-free composites, high-strength adhesives, and precision castings. The copolymer compositions are formed from the cationic initiated polymerization of alicyclic spiroorthocarbonate monomers and epoxy resin monomers or comonomers. A preferred spiroorthocarbonate monomer is 2,3,8,9-di(tetramethylene)-1,5,7,11-tetraoxaspiro-[5,5]undecane. A preferred epoxy resin is a three component epoxy comonomer mixture of (i) diglycidyl ether of bisphenol A, (ii) 3,4-epoxycyclohexanemethyl-3,4-epoxycyclohexane carboxylate, and (iii) vinyl cyclohexene dioxide, preferably in a ratio of 5:4:1 by weight.

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