Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1978-05-30
1980-04-08
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528179, 528180, 528190, 528193, 528194, C08G 6366, C08G 6368
Patent
active
041973933
ABSTRACT:
Polymers of the following formulas, and cross-linked resins formed therefrom through thermal cleavage of the four-membered rings of the biphenylene nuclei, are useful as molding and laminating materials: ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, Ar.sub.4 and Ar.sub.5 are the same or different bivalent aromatic hydrocarbon radicals containing six to ten carbons, n is an integer from 100 to 200, m is an integer from 5 to 25, x is an integer from 50 to 100, and y is an integer from 3 to 12. In the preferred modifications, n is an integer from 50 to 190 and m is an integer from 8 to 15, and the preferred ratio of n to m is from about 18:1 to about 20:1; in one species n is about 152 and m is about 8, while in a related species n is about 190 and m is about 10. In the other preferred modifications, x is an integer from 55 to 75 and y is an integer from 6 to 9, and the preferred ratio of x to y is from about 8:1 to about 10:1; in one species x is about 60 and y is about 7, while in a related species x is about 72 and y is about 8.
REFERENCES:
patent: 3725070 (1973-04-01), Hamb et al.
patent: 3859254 (1975-01-01), Hamb et al.
Marvel Carl S.
Swedo Raymond J.
Lee Lester L.
University Patents Inc.
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