Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-03-27
1992-01-21
Seccuro, Carman J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525192, 524518, C08L 2312, C08L 4500, C08L 2510, C08J 518
Patent
active
050829009
ABSTRACT:
The present invention relates to an opacified molded product composed mainly of a polypropylene resin. More particularly, according to the present invention, there are provided an opacified stretched molded product having a total light transmittance of 50% or less and a density of 0.89 or less comprising a composition comprising 100 parts by weight of polypropylene and 3 to 40 parts by weight of a cyclopentadiene petroleum resin and/or a hydrogenated cyclopentadiene petroleum resin, the molded product being a product stretched in at least one direction. Also provided are a resin composition comprising 100 parts by weight of a crystalline polypropylene and 30 to 40 parts by weight of a copolymer resin comprising a copolymer of a cyclopentadiene compound and an aromatic hydrocarbon or its hydrogenated product, a stretched molded product thereof.
REFERENCES:
patent: 3663488 (1972-05-01), Kail
patent: 4230767 (1980-10-01), Isaka et al.
patent: 4615941 (1986-10-01), Lu
patent: 4615942 (1986-10-01), Lu
patent: 4927885 (1990-05-01), Hayashida et al.
Hayashida Suetou
Ishibashi Tadao
Kimura Kyoichiro
Kuroda Takashi
Sameshima Masaru
Chisso Corporation
Maruzen Petrochemical Co. Ltd.
Seccuro Carman J.
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