Reactive modifier of elastomeric comb copolymer for thermosettin

Details Reactive modifier of elastomeric comb copolymer for thermosettin Reactive modifier of elastomeric comb copolymer for thermosettin

1993-07-06

1996-04-09

Mullis, Jeffrey

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263171, 526319, 526320, 526328, 5263285, 5263295, 5263296, 5263297, 526329, 5263291, 5263294, 5263292, C08F22028, C08F22006, C08F22000

Patent

active

055063209

ABSTRACT:
A reactive polymeric modifier to improve toughness and/or flexibility of thermosetting resins where the polymer has a comb configuration including a saturated polymeric backbone having reactive groups at each end and at least one pendent chain which is miscible with the thermosetting resin while it is uncured; the backbone being a polymeric chain of carbon-carbon linkages free of olefinic unsaturation, having a glass transition temperature Tg in the range from -100.degree. C. to 25.degree. C.;
the reactive groups being reactive with the thermosetting resin, being positioned on both ends of the backbone, and comprising, on average, at least 1.2 but less than 2 reactive groups positioned so as to yield a substantially difunctionalized comb;
the pendent chain or chains being linked to said backbone, being present in an amount in the range from 3% to 40% by weight of said comb copolymer, and having from 2 to 250 repeating units selected from the group consisting of polyester, polyether, polystyrene, and polymethacrylate; and,
the comb polymer having a number average molecular weight in the range from 1,000 to 20,000, and a process for making the modifier.

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