In situ cyclopolymerized vinyl anhydride in polyepoxide

Details In situ cyclopolymerized vinyl anhydride in polyepoxide In situ cyclopolymerized vinyl anhydride in polyepoxide

1989-01-09

1990-08-07

Marquis, Melvyn I.

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

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

522 15, 522 42, 525530, 525531, C08L 6310

Patent

active

049468758

ABSTRACT:
A B stageable thermosettable composition containing at least one polyepoxide and at least one linear anhydride monomer capable of forming a cyclopolymer in situ and processes for the formation of the B stage intermediate and final thermoset having a high service temperature is provided. The composition is useful in a two stage process; first to form a storage stable, flowable thermoplastic B stage intermediate by the free radical initiated vinyl polymerization of the linear anhydride in the liquid composition to a cyclic polymer and secondly to react the cyclic polymer with the poly epoxide to form a crosslinked high service temperature theremoset useful in the preparation of laminates, such as printed circuit boards, adhesives, and encapsulants.

REFERENCES:
patent: 3676398 (1972-07-01), D'Alelio
patent: 3732332 (1973-05-01), Curtis, Jr. et al.
patent: 3770602 (1973-11-01), D'Alelio
patent: 3930971 (1976-01-01), Karoly et al.
patent: 4398013 (1983-08-01), Johnson
D'Alelio, "Esters of Polyepoxides with Polymerizing and Crosslinking Properties", Chemical Abstracts, vol. 81, No. 16, Abstract No. 923776, 1974.
Nishiboko et al., "Hardenable Epoxy Compositions", Chemical Abstracts, vol. 82, No. 18, Abstract No. 1133446, 1975.
D'Alelio, "Esters of Polyepoxides with Polymerizing and Crosslinking Properties", Chemical Abstracts, vol. 85, No. 18, Abstract No. 124996d, 1976.

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