RLP modified unsaturated polyester resins blended with reactive

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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528272, 528296, 528297, 528303, 528306, 528308, 528392, 525 31, 525 33, 525 44, 525 45, 525 46, 525 65, 525 66, 525119, 525165, 525168, 525295, 5253291, 5253297, 5253299, 525438, 525445, 525449, 524 81, 524849, 524850, 523400, 523407, 523408, 523411, 523412, 523500, C08F 2000

Patent

active

052684520

ABSTRACT:
Unsaturated polyester resins of the type already having reactive liquid polymers reacted into the backbone of the resins, are cured in the presence of a reactive liquid polymer additive admixed with the prereacted unsaturated polyester resin. Heating of this system during cure causes the reactive liquid polymer additive to miscibilize with the unsaturated polyester resin. The unsaturated polyester resin modified in the manner described above shows a significant enhancement in toughness as measured by fracture energy over unmodified counterparts or counterparts modified by known methods of adduction or admixing alone.

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