Crystalline polypropylene and crystalline polypropylene composit

Details Crystalline polypropylene and crystalline polypropylene composit Crystalline polypropylene and crystalline polypropylene composit

1989-11-06

1992-08-25

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...

525240, 525 88, 525 95, 526351, C08L 2312, C08F11006, C08F29708

Patent

active

051419947

ABSTRACT:
Crystalline polypropylene excellent in rigidity, heat resistance and surface hardness is disclosed, having a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw/Mn) of 10 or more, an intrinsic viscosity [.eta.] of from 0.8 to 5.0 dl/g as measured in tetralin at 135.degree. C., a cold xylene-soluble content (CXS) of not more than 4% by weight, a density (d) of 0.910 g/cm.sup.3 or more as measured at 23.degree. C., and a long period (L) (.ANG.) as measured at 25.degree. C. by a small-angle X-ray scattering method satisfying relationship:

REFERENCES:
patent: 4551501 (1985-11-01), Shiga et al.
patent: 4584239 (1986-04-01), Kakugo et al.
patent: 4603174 (1986-07-01), Okada et al.

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