Polypropylene resin for high-rigidity molded products

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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526119, 526142, 525240, C08F 1006

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active

045229945

ABSTRACT:
A polypropylene resin from which high-rigidity molded products can be produced even when no particular additive is added, is provided, which resin has a melt rate of 0.1 to 100, a density of 0.905 to 0.936, and a boiling n-heptane-insoluble part whose isotactic pentad ratio (P.sub.o) is 0.975 to 0.995, and whose pentad ratio (P.sub.2) having two different kinds of configurations of 0.002 to 0.000%, and preferably has a melting point of 165.degree. to 170.degree. C. as measured by differential scanning calorimetry.

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patent: 4304892 (1981-12-01), Shiga et al.
patent: 4309521 (1982-01-01), Sato et al.
patent: 4368304 (1983-01-01), Sato et al.
patent: 4387198 (1983-06-01), Sato et al.
patent: 4405775 (1983-09-01), Hashimoto

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