High-molecular unsaturated polyester resin
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United States of America Patent
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Dec 6, 1994
Grant Date -
N/A
app pub date -
Mar 24, 1992
filing date -
Mar 26, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An unsaturated alkyd having a number-average molecular weight of at least 5000 and having terminal carboxyl groups is provided by esterification and then deglycolization reaction of an .alpha.,.beta.-unsaturated polybasic acid or an polyhydroxy alcohol followed by reaction with polybasic acid anhydride to substitute more than 10 mole % of terminal hydroxyl groups with carboxyl groups. High molecular weight unsaturated polyester resin is also provided by formulating the unsaturated alkyd with a copolymerizable monomer such as styrene. The polyester resin can be widely used in a various applications by employing the excellent physical properties thereof.
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