Styrene terminated multifunctional oligomeric phenols as new thermosetting resins for composites
AssigneeAllied-Signal Inc.
InventorsJoseph J. Zupancic, Andrew M. Zweig, James A. Wrezel
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Abstract
Thermosetting resins which are essentially vinylbenzyl end-capped ethers of the oligomeric condensation products of certain dihydric phenols and formaldehyde are readily polymerized to give an extensively cross-linked polymer particularly useful in printed circuit boards and similar laminates. Effective cost reduction may be enjoyed by replacing up to 50% of the vinylbenzyl moieties by other groups, such as alkyl and benzyl groups, without destroying the usefulness of the resulting thermosetting resins. The vinylbenzyl ether product from bisphenol-A is especially recommended.
Claims17
The polymeric product resulting from curing a resin which is a vinylbenzyl ether of the oligomeric condensation product of a dihydric phenol and formaldehyde and with the formula:
- ##STR5## where the recurring unit Q has the structure, ##STR6## and n is an integer from 1 to 10;
- s is 0 or 1;
- each X is independently selected from the group consisting of CH.sub.2, C(CH.sub.3).sub.2, C(CF.sub.3).sub.2, S(O).sub.2, C(O), and OC.sub.6 H.sub.4 O;
- each R.sub.1 and R.sub.2 is independently selected from the group consisting of hydrogen, alkyl and alkoxy moieties containing 1 to 10 carbon atoms, phenyl, and phenoxy;
- a and b are independently 0 or integers from 1 to 4;
- Z is Cl or Br;
- E is selected from the group consisting of vinylbenzyl moiety, alkyl moieties containing 1 to 10 carbon atoms, or benzyl, subject to the constraint that at least 50% of all E's are the vinylbenzyl moiety.
Dependencies are inferred from the claim text.