Powder coating having good UV resistance

Details Powder coating having good UV resistance Powder coating having good UV resistance

1995-03-24

1995-11-07

Acquah, Samuel A.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528272, 528296, 528298, 528302, 528305, 528307, 528308, 5283086, 525437, 525448, C08F 2000

Patent

active

054649099

ABSTRACT:
Provided are thermosetting powder coatings based on a resin based on dimethyl 2,6-decalindicarboxylate and neopentyl glycol. The resin may be modified with other diacids or diols but must have a suitable glass transition temperature (Tg) required for powder coatings. We have found that this aliphatic polyester meets the basic Tg requirement of powder coatings and found that it provides powder coating with excellent weatherability. The polyester resin has a number average molecular weight (Mn) of from about 1,500 to about 10,000, a glass transition temperature (Tg) of about 45.degree. C. to 100.degree. C., and a hydroxyl or acid number of from about 20 to about 100.

REFERENCES:
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patent: 4363908 (1982-12-01), Joyner et al.
patent: 4525504 (1985-06-01), Morris et al.
patent: 4611049 (1986-09-01), Kuratsuji et al.
patent: 5097006 (1992-03-01), Kapilow et al.
patent: 5290835 (1994-03-01), Hatayama et al.

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