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B-STAGEABLE THERMOSETTABLE COMPOSITIONS,THEIR PREPARATION AND THEIR USE
B-STAGEABLE THERMOSETTABLE COMPOSITIONS,THEIR PREPARATION AND THEIR USE
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机译:B阶可热组成,其制备和用途
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摘要
The invention is concerned with B Stageable thermosettable compositions capable of producing a thermoset having a high service temperature comprising at least one polyepoxide and at least one linear anhydride monomer capable of forming a cyclopolymer in situ. 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 thermoset useful in the preparation of laminates, such as printed circuit boards, adhesives, and encapsulants.
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