US4818791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition for use in powder paint
Assignee: DIC Corp
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Filing: 1987-04-08
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Granted: 1989-04-04
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Expires: 2007-04-08
Abstract
Abstract A resin composition for use in a powder paint. The composition is either a composition (I) compriisng (A) a polyester resin containing both carboxyl and hydroxyl groups, (B-1) a vinyl monomer containing both (beta-methyl)glycidyl and hydroxyl groups and (C) a blocked isocyanate in a weight ratio of 60-96:3-40:1-20, or a composition (II) comprising (A) a polyester resin containing both carboxyl and hydroxyl groups, (B-2) a (beta-methyl) glycidyl group-containing vinyl polymer, (B-3) a hydroxyl group-containing vinyl polymer, and (C) a blocked isocyanate in a weight ratio of 60-96:3-40:3-40:1-20.
Inventors
- 👤 Haruhiko Murakami
- 👤 Hirofumi Takeda
- 👤 Hiroshi Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:05
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4063; C08G18/42; C08G18/4263; C08G2150/00; C08G2150/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
345 words
A resin composition for use in a powder paint, said composition comprising as essential components either (A) 60 to 96 parts by weight of a polyester resin having an acid number of 5 to 100 mg KOH/g, a hydroxyl number of 5 to 100 mg KOH/g, a softening point of 80° to 150° C. and a number average molecular weight of 1,000 to 10,000, (B-1) 3 to 40 parts by weight of a vinyl polymer containing both (beta-methyl)glycidyl and hydroxyl groups and having a number average molecular weight of 300 to 8,000, said polymer being obtained from 10 to 95% by weight of at least one (beta-methyl)glycidyl group-containing vinyl monomer selected from the group consisting of glycidyl acrylate, glycidyl methacrylate, beta-methylglycidyl acrylate and beta-methylglycidyl methacrylate, 5 to 60% by weight of a hydroxyl group-containing vinyl monomer and 0 to 85% by weight of another vinyl monomer, and (C) 1 to 20 parts by weight of a blocked isocyanate; or (A) 60 to 96 parts by weight of a polyester resin having an acid number of 5 to 100 mg KOH/g, a hydroxyl number of 5 to 100 mg KOH/g, a softening point of 80 to 150° C. and a number average molecular weight of 1,000 to 10,000, (B-2) 3 to 40 parts by weight of a (beta-methyl)glycidyl group-containing vinyl polymer having a number average molecular weight of 300 to 8,000 and obtained from 10 to 95% by weight of at least one (beta-methyl)glycidyl group-containing vinyl monomer selected from the group consisting of glycidyl acrylate, glycidyl methacrylate, beta-methylglycidyl acrylate and beta-methylglycidyl methacrylate and 5 to 90% by weight of another vinyl monomer copolymerizable with the (beta-methyl)glycidyl group-containing vinyl monomer, (B-3) 3 to 40 parts by weight of a hydroxyl group-containing vinyl polymer having a number average molecular weight of 300 to 8,000 and obtained from 10 to 95% by weight of a hydroxyl group-containing vinyl monomer and 5 to 90% by weight of another vinyl monomer copolymerizable with the hydroxyl group-containing vinyl monomer, and (C) 1 to 20 parts by weight of a blocked isocyanate. cyanate.
Claim 2
Dependent Claim
345 words
A resin composition for use in a powder paint, said composition comprising as essential components either (A) 60 to 96 parts by weight of a polyester resin having an acid number of 5 to 100 mg KOH/g, a hydroxyl number of 5 to 100 mg KOH/g, a softening point of 80° to 150° C. and a number average molecular weight of 1,000 to 10,000, (B-1) 3 to 40 parts by weight of a vinyl polymer containing both (beta-methyl)glycidyl and hydroxyl groups and having a number average molecular weight of 300 to 8,000, said polymer being obtained from 10 to 95% by weight of at least one (beta-methyl)glycidyl group-containing vinyl monomer selected from the group consisting of glycidyl acrylate, glycidyl methacrylate, beta-methylglycidyl acrylate and beta-methylglycidyl methacrylate, 5 to 60% by weight of a hydroxyl group-containing vinyl monomer and 0 to 85% by weight of another vinyl monomer, and (C) 1 to 20 parts by weight of a blocked isocyanate; or (A) 60 to 96 parts by weight of a polyester resin having an acid number of 5 to 100 mg KOH/g, a hydroxyl number of 5 to 100 mg KOH/g, a softening point of 80 to 150° C. and a number average molecular weight of 1,000 to 10,000, (B-2) 3 to 40 parts by weight of a (beta-methyl)glycidyl group-containing vinyl polymer having a number average molecular weight of 300 to 8,000 and obtained from 10 to 95% by weight of at least one (beta-methyl)glycidyl group-containing vinyl monomer selected from the group consisting of glycidyl acrylate, glycidyl methacrylate, beta-methylglycidyl acrylate and beta-methylglycidyl methacrylate and 5 to 90% by weight of another vinyl monomer copolymerizable with the (beta-methyl)glycidyl group-containing vinyl monomer, (B-3) 3 to 40 parts by weight of a hydroxyl group-containing vinyl polymer having a number average molecular weight of 300 to 8,000 and obtained from 10 to 95% by weight of a hydroxyl group-containing vinyl monomer and 5 to 90% by weight of another vinyl monomer copolymerizable with the hydroxyl group-containing vinyl monomer, and (C) 1 to 20 parts by weight of a blocked isocyanate. cyanate.
Claim 3
Dependent Claim
38 words
The composition of claim 1 which comprises 60 to 90 parts by weight of the component (A), 7 to 30 parts by weight of the comonent (B-1) and 3 to 15 parts by weight of the component (C).
Claim 4
Dependent Claim
48 words
The composition of claim 1 which comprises 60 to 90 parts by weight of the component (A), 7 to 30 parts by weight of the component (B-2), 7 to 30 parts by weight of the component (B-3) and 3 to 15 parts by weight of the component (C).
Claim 5
Dependent Claim
45 words
The resin composition of claim 1 wherein the polyester resin (A) has an acid number of from 10 to 70, a hydroxyl number of 10 to 70, a softening point of 100° to 130° C., and a number average molecular weight of 2,000 to 5,000.
Claim 6
Dependent Claim
51 words
The resin composition of claim 2 wherein the vinyl polymer (B-1) is obtained from 15 to 85% by weight of said at least one glycidyl group-containing vinyl monomer and from 7 to 50% by weight of said hydroxyl group-containing vinyl monomer and 20 to 75% by weight of another vinyl monomer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |