COPOLYMERIZED POLYESTER, COPOLYMERIZED POLYESTER COMPOSITION FOR POWDERY COATING AGENT COMPRISING THE SAME, AND POWDERY COATING AGENT

WIPO Patent Application WO/2008/010503

A1

Disclosed is a copolymerized polyester produced by conducting polycondensation using a polycondensation catalyst comprising at least one member selected from the group consisting of aluminum and a compound thereof, wherein a polycarboxylic acid component constituting the copolymerized polyester is composed of 50 mol% or more of terephthalic acid and 0 to 10 mol% of a trifunctional or higher polycarboxylic acid, and a polyhydric alcohol component constituting the copolymerized polyester is composed of 90 to 100 mol% of an alkylene glycol having 20 or less carbon atoms and 0 to 10 mol% of a trifunctional or higher polyhydric alcohol. The copolymerized polyester has excellent transparency, color tone, weather resistance and impact resistance. By using the copolymerized polyester, it becomes possible to produce a powdery coating agent having excellent weather resistance, properties of a coating film, and reactivity with a curing agent during crosslinking process, therefore particularly excellent in gel fraction, workability, water resistance, adhesion properties, and adhesion properties after being subjected to water resistance test.

TOGAWA KEIICHIRO (JP)
ETO YOSHITAKA (JP)

PCT/JP2007/064141

January 24, 2008

July 18, 2007

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TOYO BOSEKI (JP)
TOGAWA KEIICHIRO (JP)
ETO YOSHITAKA (JP)

C08G63/127; C08G63/84; C09D5/03; C09D167/02; C09D175/04

JP2001163963A	2001-06-19
JP2001163964A	2001-06-19
JP2002322254A	2002-11-08
JP2002332337A	2002-11-22
JP2001106775A	2001-04-17
JPH04505343A	1992-09-17
JPH0770475A	1995-03-14
JP2007009139A	2007-01-18
JP2006312721A	2006-11-16
JP2006290907A	2006-10-26

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