Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-12-04
2007-12-04
Seidleck, James J. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S285000, C525S322000, C525S240000, C525S074000, C525S078000, C525S080000, C525S069000
Reexamination Certificate
active
11207932
ABSTRACT:
A problem of the invention is to provide a propylene copolymer which is excellent in adhesion to crystalline propylene-based polymers and which is excellent in solubility and compatibility with polar resins, a process for producing the same, and a composition containing the subject polypropylene copolymer.The invention is concerned with a polypropylene copolymer, which is characterized by having a polymer principal chain (A) derived from a propylene-based polymer having (1) a prescribed requirement as defined by the13C-NMR spectral measurement and having (2) a melting point [Tm] by a differential scanning calorimeter of not higher than 100° C., or a crystal melting heat of less than 5 J/g; and a side chain containing a polymer chain (B) which is different from the principal chain, with a weight ratio of (A)/(B) being in the range of from 20/1 to 1/20, a composition containing the subject copolymer, and a process for producing the subject copolymer.
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Hata Kazuyuki
Onoe Masato
Asinovsky Olga
Mitsubishi Chemical Corporation
Seidleck James J.
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