Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-05-17
2005-05-17
Peng, Kuo-Liang (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S095000, C525S098000, C525S187000
Reexamination Certificate
active
06894113
ABSTRACT:
The present invention relates to a thermoset material with improved impact resistance comprising:99 to 20% of a thermoset resin, and1 to 80% of an impact modifier comprising at least one copolymer comprising S-B-M, B-M and M-B-M blocks,wherein:each block is connected to the other by means of a covalent bond or of an intermediate molecule connected to one of the blocks via a covalent bond and to the other block via another covalent bond,M is a PMMA homopolymer or a copolymer comprising at least 50% by weight of methyl methacrylate,B is incompatible with the thermoset resin and with the M block and its glass transition temperature Tg is less than the operating temperature of the thermoset material, andS is incompatible with the thermoset resin, the B block and the M block and its Tg or its melting temperature is greater than the Tg of B.S is advantageously polystyrene and B polybutadiene. The thermoset resin advantageously originates from the reaction of a thermosetting epoxy resin and of a hardener.
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Court Francois
Leibler Ludwik
Pascault Jean-Pierre
Ritzenthaler Sophie
Atofina
Peng Kuo-Liang
Smith, Gambrell and Russell, LLP
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