Bimodal cured intermixed polymeric networks which are stable at

Details Bimodal cured intermixed polymeric networks which are stable at Bimodal cured intermixed polymeric networks which are stable at

1992-08-26

1994-07-19

Berman, Susan

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

Synthetic resins

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

522 40, 522 41, 522 42, 522 43, 522 44, 522 48, 522 59, 522 67, 522 31, 522167, 522175, 522176, 522178, 522179, 522182, 522183, 522184, 522186, 522187, 522188, C08F 250, C08F 1814, C08F 1818

Patent

active

053310187

ABSTRACT:
The present invention is directed to a non-emissive, bimodal cured polymeric network which has an onset degradation temperature that is about 100.degree. C. above the onset degradation temperature of a base polymer. The novel cured polymeric network comprises the cured reaction product of the following ingredients: (a) combination of one or more liquid carrier monomers or prepolymers which combination is reactive to form a base polymer by exposure to ultraviolet (UV) radiation in the presence of a UV photosensitizer at a temperature, T.sub.uv ; and (b) between about 10 and 100 wt-% based on ingredient (a) of a combination of one or more monomers or prepolymers which combination is reactive to form a cured high temperature stable polymer by heating at a temperature, T.sub..DELTA.. Ingredient (b) is soluble or dispersible in ingredient (a) at a temperature, T.sub.s, wherein T.sub.s is equal to or lower than T.sub.uv, and T.sub.uv is at least about 50.degree. C. lower than T.sub..DELTA..

REFERENCES:
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patent: 4128600 (1978-12-01), Skinner et al.
patent: 4288527 (1981-09-01), Morgan
patent: 4377457 (1983-03-01), Boeckler et al.
patent: 5021519 (1991-06-01), Varde et al.
patent: 5098961 (1992-03-01), Pater
patent: 5169902 (1992-12-01), Yagi et al.

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