Mitsubishi Chemical Corporation

Teruaki Ashihara

Fumihiko Shimizu

Naomasa Sato

Kazuyuki Hata

Masato Onoe

Akio Tanna

Yukihito Zanka

Kouichi Nakayama

A polypropylene type aqueous dispersion comprising the following components (a) to (c): wherein the component (a) has a main chain having the following features (1) and (2) and dispersion particles in the dispersion have an average particle size of at most 0.5 &#x3bc;m, Feature (1) when observing a peak derived from a carbon atom of a methyl group in a propylene unit chain part comprising a head-to-tail bond byC-NMR and fixing a chemical shift of a peak top at a peak attributable to pentad expressed by mmmm to 21.8 ppm, a ratio (S/S) of an area Sof a peak of a peak top at 21.8 ppm to a total area S of peaks at from 19.8 ppm to 22.1 ppm is at least 10% and at most 60%, and when an area of a peak (mmmr) of a peak top at 21.5 to 21.6 ppm is expressed as S, 4+2S/S&#x3e;5, and Feature (2) a content ratio (mol ratio) of propylene unit (A): other olefin unit (B) is from 100:0 to 90:10.

Polypropylene type aqueous dispersion, polypropylene type composite aqueous emulsion composition and its use

This invention provides a graft modified polypropylene polymer which does not contain halogens, is excellent in certain properties such as solubility and can add good adhesiveness and coating ability to crystalline propylene polymer base materials, and a composition containing the same; and in particular, it provides a propylene polymer which contains a propylene polymer main chain having a stereo-block structure containing an isotactic block and a side chain containing a carboxylic acid group, an acid anhydride group or a carboxylic acid ester group, wherein when it is dissolved in toluene to a concentration of 10% by weight at 25&#xb0; C., the insoluble matter is 1% by weight or less based on the total polymer, and a composition containing the same.

Modified propylene polymer, composition containing the same and use thereof

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Mie, Japan

Teruaki Ashihara