Non-blooming polyester coating powder

Details Non-blooming polyester coating powder Non-blooming polyester coating powder

1997-12-19

1999-03-09

Gulakowski, Randy

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

Synthetic resins

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

525533, 525934, 525 31, C08F 2000

Patent

active

058802231

ABSTRACT:
In a coating powder composition comprising A) a polyester resin having carboxyl functionality so as to provide an acid number of between about 15 and about 100, plus B) epoxy curative at a stoichiometric equivalent relative to said polyester resin of between about 0.7 and about 1.3, blooming in the cured coating resulting therefrom is reduced or eliminated by incorporating within the polyester resin A) the monomer 2-butyl, 2-ethyl, 1,3-propane diol (BEPD) at a level to provide between 2 and 25 mole percent of the hydroxyl functionality relative to total hydroxyl functionality of hydroxyl-functional monomers forming the polyester resin.

REFERENCES:
patent: 5187220 (1993-02-01), Richart et al.
patent: 5397641 (1995-03-01), Moens et al.
patent: 5411810 (1995-05-01), Hirakouchi et al.
patent: 5620801 (1997-04-01), Binns et al.
Journal, "Improved hydrolytic . . . ", CA AN:119:227141, 1993.

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