Powder coating of non-crystalline and crystalline epoxy resins

Details Powder coating of non-crystalline and crystalline epoxy resins Powder coating of non-crystalline and crystalline epoxy resins

1999-05-07

2000-10-31

Sellers, Robert E. L.

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

Synthetic resins

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

427386, 428418, 525525, 525526, B32B 1508, C08L 6302

Patent

active

061404306

ABSTRACT:
Provided are low temperature curing thermosetting epoxy powder coating compositions comprising at least one non-crystalline epoxy resin, at least one crystalline epoxy resin, a curing agent, and a cure catalyst. Coatings made from such powder compositions exhibit a substantial reduction in bubble entrapment, enough to prevent a visible haze from forming in the coating, when cured at low temperatures demanded by brass substrates, while the powders from which the coatings are made still exhibit good storage stability and melt-processability.

REFERENCES:
patent: 4421897 (1983-12-01), Gutekunst et al.
patent: 4675443 (1987-06-01), Bertram et al.
patent: 4687832 (1987-08-01), Ehara et al.
patent: 4764581 (1988-08-01), Muller et al.
patent: 5414058 (1995-05-01), Ono et al.

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