Low-cure powder coatings and methods for using the same

Details Low-cure powder coatings and methods for using the same Low-cure powder coatings and methods for using the same

2006-08-15

2006-08-15

Sellers, Robert (Department: 1712)

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

Synthetic resins

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

C428S413000, C428S416000, C428S447000, C428S457000, C428S458000, C428S480000, C428S483000, C428S500000, C428S511000, C525S100000, C525S101000, C525S123000, C525S125000, C525S131000, C525S166000, C525S176000, C525S187000, C525S453000, C525S486000, C525S502000, C525S504000, C525S528000, C528S068000, C528S085000

Reexamination Certificate

active

07091286

ABSTRACT:
Low-cure powder coating compositions are disclosed, comprising at least one epoxy-containing resin and/or at least one siloxane-containing resin, and at least one material having the structurewherein R1is an organic radical having 6 to 25 carbon atoms; each R2is independently a multivalent hydrocarbon group having 1 to 20 carbon atoms; Y iseach R3and R4are independently alkyl or aryl groups having 1 to 8 carbon atoms; each Z is independently oxygen or nitrogen; R5is absent when Z is oxygen and R5is hydrogen, an alkyl or aryl group having 1 to 20 carbon atoms, or (Y)a—R2— when Z is nitrogen; a and b are integers; a is at least 1; b is 1 to 3; and (b) at least one epoxy-containing resin and/or at least one siloxane-containing resin. The material can optionally be reacted with an acidic hydrogen-containing compound. Some compositions are curable without using crosslinking agents or accelerators. Methods for coating a substrate using these compositions, the coated substrates, and additional catalysts useful for the same purpose are also disclosed.

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