US4499239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition for powder coating
Assignee: DIC Corp
•
Filing: 1981-03-26
•
Granted: 1985-02-12
•
Expires: 2001-03-26
Abstract
Abstract A resin composition for powder coating, said composition consisting essentially of (A) 60 to 97% by weight of a polyester resin having an acid value of 15 to 200 mgKOH/g and a softening point of 80 DEG to 150 DEG C., and (B) 3 to 40% by weight of a glycidyl-containing acrylic polymer unmodified or modified with a monobasic acid.
Inventors
- 👤 Yoichi Murakami
- 👤 Akio Shoji
- 👤 Shoichiro Takezawa
- 👤 Noboru Ishikawa
- 👤 Toshiaki Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:22
CPC Classifications
C; C09; C09D; C09D167/00; C09D167/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
62 words
A resin composition for powder coating, said composition consisting essentially of (A) 60 to 97% by weight of a polyester resin having an acid value of 20 to 200 mgKOH/g and a softening point of 80° to 150° C., and (B) 3 to 40% by weight of a glycidyl-containing acrylic polymer which is compatible with and reactive with the polyester resin (A).
Claim 2
Dependent Claim
62 words
A resin composition for powder coating, said composition consisting essentially of (A) 60 to 97% by weight of a polyester resin having an acid value of 20 to 200 mgKOH/g and a softening point of 80° to 150° C., and (B) 3 to 40% by weight of a glycidyl-containing acrylic polymer which is compatible with and reactive with the polyester resin (A).
Claim 3
Dependent Claim
49 words
The composition of claim 1 wherein the glycidyl-containing acrylic polymer (B) is obtained from 20 to 100% by weight of at least one compound selected from the group consisting of glycidyl acrylate, glycidyl methacrylate, β-methylglycidyl acrylate and β-methylglycidyl methacrylate, and 0 to 80% by weight of another vinyl monomer.
Claim 4
Dependent Claim
22 words
The composition of claims 1 or 2 wherein the polyester resin (A) has a number average molecular weight of 1,000 to 10,000.
Claim 5
Dependent Claim
26 words
The composition of any one of claims 1 or 2 wherein the glycidyl-containing acrylic polymer (B) has a number average molecular weight of 300 to 5,000.
Claim 6
Dependent Claim
58 words
The composition of any one of claims 1 or 2 which further comprises 0.5 to 20 parts by weight, per 100 parts by weight of the polyester resin (A) and the acrylic polymer (B) combined, of at least one compound selected from the group consisting of (C) aliphatic dibasic acids, (D) polyepoxy resins, and (E) carboxyl-containing vinyl polymers.
Claim 7
Dependent Claim
28 words
The composition of claim 1 wherein the polyester rein (A) has an acid value of 20 to 70 mgKOH/g and a softening point of 100° to 130° C.
Claim 8
Dependent Claim
29 words
The composition of claim 1 which consists essentially of 70 to 90% by weight of the polyester resin and 10 to 30% by weight of the glycidyl-containing acrylic polymer.
Claim 9
Dependent Claim
24 words
The composition of claim 1 wherein the average number of carboxyl groups per molecule of the polyester resin (A) is from 1.2 to 3.0.
Claim 10
Dependent Claim
56 words
The composition of claim 2 wherein the glycidyl-containing acrylic polymer (B) is a copolymer of from 40 to 80% by weight of said at least one compound and 20 to 60% by weight of another vinyl monomer selected from the group consisting of styrene, methacrylic acid esters, acrylic acid esters, fumaric acid diesters, acrylonitrile and acrylamide.
Claim 11
Dependent Claim
22 words
The composition of claim 9 wherein the other vinyl monomer comprises at least 50% by weight of methyl methacrylate or Cellosolve methacrylate.
Claim 12
Dependent Claim
44 words
The composition of claim 2 wherein the glycidyl-containing acrylic polymer (B) is obtained from 20 to 99% by weight of said at least one compound, 0 to 60% by weight of another vinyl monomer and 1 to 20% by weight of a monobasic acid.
Claim 13
Dependent Claim
44 words
The composition of claim 11 wherein the glycidyl-containing acrylic polymer (B) is obtained from 40 to 78% by weight of said at least one compound, 20 to 50% by weight of another vinyl monomer and 2 to 10% by weight of said monobasic acid.
Claim 14
Dependent Claim
56 words
The composition of claim 1 which further comprises 0.5 to 20 parts by weight, per 100 parts of the combined weight of the polyester resin (A) and the acrylic polymer (B) of (C) an aliphatic dibasic acid of the formula HOOC--R--COOH wherein R represents a linear or branched alkylene group having 1 to 20 carbon atoms.
Claim 15
Dependent Claim
62 words
The composition of claim 1 which further comprises 0.5 to 20 parts by weight, per 100 parts of the combined weight of the polyester resin (A) and the acrylic polymer (B) of (D) a polyepoxy resin having at least two epoxy groups per molecule and an epoxy equivalent of 80 to 2,000 and a number average molecular weight of 300 to 5,000.
Claim 16
Dependent Claim
56 words
The composition of claim 1 which further comprises 0.5 to 20 parts by weight, per 100 parts of the combined weight of the polyester resin (A) and the acrylic polymer (B) of (E) a carboxyl-containing vinyl polymer having an acid value of 10 to 20 mgKOH/g, and a number average molecular weight of 300 to 10,000.
References Cited (Backward Citations)
GB1381262A
Cited
GB1384038A
Cited
US3857905A
Cited
US3932320A
Cited
US3932349A
Cited
US3998905A
Cited
US3978153A
Cited
US4012559A
Cited
GB1509043A
Cited
US4246368A
Cited
US4320207A
Cited
US4284540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |