Propylene polymers and resin composition and molding...

Details Propylene polymers and resin composition and molding... Propylene polymers and resin composition and molding...

2007-02-06

2007-02-06

Lu, Caixia (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S133000, C526S134000, C526S160000, C526S165000, C526S943000

Reexamination Certificate

active

10088505

ABSTRACT:
The propylene polymer of the present invention satisfies (1) a 25° C. hexane soluble content (H25) of 0–80 wt %; and (2) either no melting temperature (Tm) measurable by differential scanning calorimetry (DSC), or a melting temperature (Tm) satisfying, if measurable by DSC, the following relationship: ΔH≧3×(Tm−120) wherein ΔH is a melting endotherm (J/g). The propylene homopolymer of the present invention satisfies (1) a meso pentad fraction (mmmm) of 30–60 mol %; (2) a racemic pentad fraction (rrrr) satisfying the following relationship: [rrrr/(1−mmmm)]≦0.1; (3) a fraction (W25) eluted at a temperatures up to 25° C. by temperature-programmed chromatography, of from 20–100 wt %; and, (4) a pentad fraction (rmrm) of more than 2.5 mol %. The propylene copolymer of the present invention satisfies (1) a stereoregularity index (P) of 55–90 mol % as determined by13C-NMR measurement; and (2) a fraction (W25) eluted at a temperatures up to 25° C. by temperature-programmed chromatography, of from 20–100 wt %.

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Patent Abstracts of Europe, EP 1 095 951, May 2, 2001.

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