Cycloolefin resin compositions

Details Cycloolefin resin compositions Cycloolefin resin compositions

C - Chemistry, Metallurgy

08

L

400/6431, 400/94

C08L 45/00 (2006.01) C08K 5/00 (2006.01) C08K 5/13 (2006.01) C08K 5/37 (2006.01) C08K 5/524 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2025021

The cycloolefin resin compositions of the present invention comprise a thermoplastic resin containing an olefin polymer having an alicyclic structure, specific stabilizers selected from phenolic stabilizers, organic thioether stabilizers, organic phosphite stabilizers, UV-ray absorbers and hindered amine stabilizers. The cycloolefin resin compositions show excellent thermal aging resistance and weathering resistance by the use of specific stabilizers, and therefore they are favorably used for forming optical instrument parts. Furthermore, the thermoplastic resin may be prepared from an olefin polymer having an alicyclic structure and a flexible polymer or flexible polymers. The incorporation of the flexible polymer especially improves the mechanical strength of the resultant products, and therefore the resin compositions are favorably used for machine parts, electronic parts, automobile parts, etc.

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