Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1995-06-07
1997-06-17
Thibodeau, Paul J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
525240, 525242, 525245, C08L 2304
Patent
active
056398166
ABSTRACT:
Disclosed are a polypropylene composition comprising 95-55 parts by weight of polypropylene (A) and 5-45 parts by weight of an ethylene/1-butene random copolymer (B-1) which contains constituent units derived from 1-butene in an amount of 15 to 25% by mol; and a polypropylene composition comprising 95-55 parts by weight of polypropylene (A) and 5-45 parts by weight of an ethylene/1-octene random copolymer (B-2) which contains constituent units derived from 1-octene in an amount of 8 to 20% by mol. Each of the random copolymers (B-1) and (B-2) has an intrinsic viscosity [.eta.] of 1.5 to 3.5 dl/g as measured in decalin, a glass transition temperature (Tg) of not higher than -50.degree. C., a crystallinity of less than 20% as measured by X-ray diffractometry, a randomness parameter (B value) of 1.0 to 1.4 as measured by .sup.13 C-NMR spectroscopy. With respect to a melting point as measured by a differential scanning calorimeter (DSC) as the main peak, the copolymer (B-1) has a value of not higher than 60.degree. C., while the copolymer (B-2) has a value of not higher than 80.degree. C.
REFERENCES:
patent: 5268220 (1993-12-01), Tajima et al.
Chemical Abstracts, vol. 71, No. 10, 17 Nov. 1969, Columbus, Ohio, US; abstract No. 92261c, H. Okada et al. `Modified polypropylene compositions` pp. 35-36; col. 2.
Ishimoto Akio
Sugi Masahiro
Wakumoto Hiroshi
Yamaguchi Masayoshi
Critharis Mary
Mitsui Petrochemical Industries Ltd.
Thibodeau Paul J.
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