Aqueous emulsion and use thereof

Details Aqueous emulsion and use thereof Aqueous emulsion and use thereof

2005-03-04

2009-02-17

Gulakowski, Randy (Department: 1796)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S166000, C524S503000, C525S056000, C525S059000, C525S061000, C525S062000

Reexamination Certificate

active

07491766

ABSTRACT:
The present invention provides an aqueous emulsion having excellent polymerization stability and standing stability and a redispersible powder. Specifically, the present invention relates to an aqueous emulsion of a polymer obtained by polymerizing an acrylic monomer in the presence of a polyvinyl alcohol containing an acetoacetic ester group; wherein the polyvinyl alcohol containing an acetoacetic ester group has block character [η] of 0.3 to 0.6, hydrolysis degree of at least 97% by mol and acetoacetic esterification degree of 0.01 to 1.5% by mol, and the value obtained by dividing the maximum value by the minimum value of the respective average acetoacetic esterification degree for each of the polyvinyl alcohol containing an acetoacetic ester group separated by particle size of 44 to 74, 74 to 105, 105 to 177, 177 to 297, 297 to 500 and 500 to 1680 μm is 1.0 to 3.0. Also, the present invention relates to a redispersible fiber obtained by drying the aqueous emulsion.

REFERENCES:
patent: 1158007 (2001-11-01), None
patent: 09077948 (1997-03-01), None
patent: 09-110925 (1997-04-01), None
patent: 09110925 (1997-04-01), None
patent: 09124874 (1997-05-01), None
patent: 11263848 (1999-09-01), None
patent: 2002-060406 (2002-02-01), None
patent: 2003-277419 (2003-10-01), None
Patent Abstracts of Japan, publication No. 2003-277419, “Aqueous Emulsion and Use of the Same”, Kiyoharu et al.
Patent Abstracts of Japan, publication No. 09-110925, “Polyvinyl Alcohol Resin Having Acetoacetic Ester Group and its Production”, Yoshiaki et al.
Patent Abstracts of Japan, publication No. 2002-060406, “Redispersible Synthetic Resin Powder and its Use”, Yukitsugu et al.
Database WPI, Section Ch, Week 199727, Derwent Publications Ltd., XP-002328078, JP 09110925, Nippon Synthetic Chemical Industry Co., Apr. 28, 1997, “Abstract”.

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