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US 11,518,900 B2Granted
Coating compositions and methods, and articles coated with same
AssigneeRed Spot Paint & Varnish Co., Inc.
InventorMark A. Parker
Life of this patent
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Abstract
Described are sealing primer compositions that can be used to reduce paint defects such as pops or vapor boil on painted plastic substrates, as well as related methods for sealing plastic substrates, and sealed plastic substrates. Sealing primer compositions of the invention include a functionalized polydiene polymer such as a hydroxylated or other functional-group-containing polybutadiene polymer.
Claims21
A coating composition, comprising:
- a functional-group-containing polydiene polymer;
- a binder;
- a first curing agent, wherein the first curing agent comprises a first aliphatic polyisocyanate based on hexamethylene diisocyanate trimer, a second curing agent, wherein the second curing agent comprises an aliphatic polyisocyanate based on isophorone diisocyanate trimer, a third curing agent, wherein the third curing agent comprises 2,3,6,7-naphthalenetetracarboxylic acid, a fourth curing agent, wherein the fourth curing agent comprises methylbicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic anhydride, and a fifth curing agent, wherein the fifth curing agent comprises a latent boron trichloride chelate;
- a water scavenger, wherein the water scavenger includes triethyl orthoformate;
- an electrically conductive pigment;
- and
- wherein upon curing the coating composition provides a surface conductivity of at least about 100 Randsburg units.
4 more elements
Dependencies are inferred from the claim text.