Solventborne binder for an intumescent coating
AssigneePPG Coatings Europe B.V.
InventorsVenkateshwarlu Kalsani, Ronnie Peskens, Kelly E. Lutz, Simion Coca
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Abstract
Solventborne binder compositions which include a copolymer obtained by reacting a mixture of monomers in the presence of an organic solvent, wherein the monomer mixture includes an ethylenically unsaturated monomer and a vinyl ester monomer having a formula CH2CH—X—C(═O)—R, where R is a linear or branched alkyl group having 2 to 18 carbon atoms, an aromatic group having 6 to 12 carbon atoms, or R is bonded to X to form a 5- to 7-member ring, and X is O. Intumescent coatings containing the solventborne binder compositions, and substrates coated with the intumescent coatings are also disclosed.
Claims22
A solventborne binder comprising:
- a copolymer obtained by reacting a composition comprising a monomer mixture and an organic solvent, the monomer mixture comprising:
- (i) 70 to 97 percent by weight of an ethylenically unsaturated monomer comprising two or more of an ester of lower alkyl (C1-C4) (meth)acrylic acid, vinyl acetate, or styrene;
- and
- (ii) 3 to 30 percent by weight of a vinyl ester monomer having a formula:
- wherein
- R is a linear or branched alkyl group having 2 to 18 carbon atoms, an aromatic group having 6 to 12 carbon atoms, or R is bonded to X to form a 5- to 7-member ring, and X is O,
- wherein the percent by weight is based on the total weight of the monomers (i) and (ii) in the monomer mixture and monomers (i) and (ii) are different from each other, and wherein the composition is essentially free of butanol.
A solventborne binder comprising:
- a copolymer obtained by reacting a composition comprising a monomer mixture and an organic solvent, the monomer mixture comprising:
- (i) 70 to 97 percent by weight of ethylenically unsaturated monomers comprising:
- (a) a vinyl acetate monomer, and (b) an ethylenically unsaturated monomer other than vinyl acetate;
- and
- (ii) 3 to 30 percent by weight of a vinyl ester monomer having a formula:
- wherein
- R is a linear or branched alkyl group having 2 to 18 carbon atoms, an aromatic group having 6 to 12 carbon atoms, or R is bonded to X to form a 5- to 7-member ring, and X is O,
- wherein the percent by weight is based on the total weight of the monomers (i)(a), (i)(b), and (ii) in the monomer mixture, and monomers (i)(a), (i)(b), and (ii) are different from each other, and wherein the composition is essentially free of butanol.
An intumescent coating composition comprising:
- (A) a solventborne binder comprising a copolymer obtained by reacting a composition comprising a monomer mixture and an organic solvent, the monomer mixture comprising:
- (i) 70 to 97 percent by weight of an ethylenically unsaturated monomer comprising two or more of an ester of lower alkyl (C1-C4) (meth)acrylic acid, vinyl acetate, or styrene, and
- (ii) 3 to 30 percent by weight of a vinyl ester monomer having a formula (I):
- wherein
- R is a linear or branched alkyl group having 2 to 18 carbon atoms, an aromatic group having 6 to 12 carbon atoms, or R is bonded to X to form a 5- to 7-member ring, and X is O,
- wherein percent by weight is based on the total weight of the monomers (ii) and (ii) in the monomer mixture, and monomers (i) and (ii) are different from each other, and
- wherein the composition is essentially free of butanol;
- (B) an acid source;
- (C) a carbon source;
- and
- (D) a gas source.
Dependencies are inferred from the claim text.