Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-07-03
2000-08-08
Sellers, Robert E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525170, 525221, 5253295, C08F 808, C08L 2722
Patent
active
061003425
ABSTRACT:
A powder coating is prepared by (a) solvent polymerizing carboxy-functional acrylate copolymers, (b) separating and reacting the copolymers with a molar excess of at least one epihaloalkane, (c) removing excess epihaloalkane, (d) adding toluene and then reacting the copolymers with a sodium hydroxide solution to produce epoxy groups-containing acrylate copolymers having an epoxide number of from 0.018-0.501 eq/100 g copolymer, a weight average molecular weight of from 1000-30,000 and a Tg of from 20-120.degree. C.; and (e) extruding the epoxy groups-containing acrylate copolymers with a hardener such as aliphatic polybasic acids or anhydrides, or carboxy-functional polyesters or acrylic resins along with additives such as pigments or fillers.
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Gisler Rene
Kaplan Andreas
Reich Albert
Ems-Inventa AG
Sellers Robert E.
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