Mixtures of spiroheptadienes

Details Mixtures of spiroheptadienes Mixtures of spiroheptadienes

1992-05-12

1993-11-16

Schofer, Jospeh L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

585 21, 585 22, 585 23, C08F 3208, C07C 1328

Patent

active

052625010

ABSTRACT:
Mixtures essentially comprising compounds of formula I or II ##STR1## wherein X is a hydrogen atom or vinyl, A is a divalent aromatic radical which is unsubstituted or substituted by one or more C.sub.1 -C.sub.20 alkyl groups, halogen atoms or halogen-substituted C.sub.1 -C.sub.20 alkyl groups, R.sub.1, R.sub.1 ', R.sub.2, R.sub.2 ', R.sub.3 and R.sub.3 ' are each a hydrogen atom, or R.sub.1 and R.sub.1 ', R.sub.2 and R.sub.2 ' and R.sub.3 and R.sub.3 ' are each together ethylene, R.sub.4 is C.sub.1 -C.sub.6 alkyl, phenylalkyl containing 1 to 6 carbon atoms in the alkyl moiety or is trialkylsilyl containing 1 to 6 carbon atoms in each alkyl moiety, m is 0, 1 or 2, n is 0 or an average number from 1 to 200, p is an average number from 1 to 100 and q is 0 or an average number from 1 to 100, can be cured by heating and are suitable for making laminates, especially for fabricating copper-clad circuit boards.

REFERENCES:
patent: 2726232 (1955-12-01), Upson
patent: 4140843 (1979-02-01), Widmer et al.

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