US4293457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealerless primers
Assignee: PPG Industries Inc
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Filing: 1979-11-14
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Granted: 1981-10-06
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Expires: 1999-11-14
Abstract
Abstract A primer composition comprises an oil-free saturated polyester resin, an aminoplast curing agent for the polyester, and a thermoplastic acrylic polymer. The primer is used as a bond coat to adhere an acrylic polymer dispersion topcoat to a metal base.
Inventors
- 👤 Martin J. Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:14
CPC Classifications
C; C09; C09D; C09D167/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
A primer composition comprising: a. an aminoplast curing agent produced from the condensation products of amines or amides with aldehydes; b. an oil-free saturated polyester having hydroxyl functionality which is curable with said curing agent to form a thermoset polymer; and c. a thermoplastic acrylic polymer which (1) is selected from the group consisting of addition polymers of esters of alpha-beta ethylenically unsaturated acids and interpolymers of esters of alpha-beta ethylenically unsaturated acids with other ethylenically unsaturated compounds; (2) is essentially non-curable with said aminoplast curing agent; (3) after curing of the primer composition, is soluble in solvents in which it was soluble before said curing; and d. cellulose acetate butyrate.
Claim 2
Dependent Claim
111 words
A primer composition comprising: a. an aminoplast curing agent produced from the condensation products of amines or amides with aldehydes; b. an oil-free saturated polyester having hydroxyl functionality which is curable with said curing agent to form a thermoset polymer; and c. a thermoplastic acrylic polymer which (1) is selected from the group consisting of addition polymers of esters of alpha-beta ethylenically unsaturated acids and interpolymers of esters of alpha-beta ethylenically unsaturated acids with other ethylenically unsaturated compounds; (2) is essentially non-curable with said aminoplast curing agent; (3) after curing of the primer composition, is soluble in solvents in which it was soluble before said curing; and d. cellulose acetate butyrate.
Claim 3
Dependent Claim
118 words
A primer composition comprising: a. an aminoplast curing agent produced from the condensation products of amines or amides with aldehydes; b. an oil-free saturated polyester having hydroxyl functionality which is curable with said curing agent to form a thermoset polymer; and c. a thermoplastic acrylic polymer which (1) is selected from the group consisting of addition polymers of esters of alpha-beta ethylenically unsaturated acids and interpolymers of esters of alpha-beta ethylenically unsaturated acids with other ethylenically unsaturated compounds; (2) is essentially non-curable with said aminoplast curing agent; (3) after curing of the primer composition, is soluble in solvents in which it was soluble before said curing; and d. hydroxyl-containing copolymer or interpolymer of vinyl halide and vinyl ester.
Claim 4
Dependent Claim
118 words
A primer composition comprising: a. an aminoplast curing agent produced from the condensation products of amines or amides with aldehydes; b. an oil-free saturated polyester having hydroxyl functionality which is curable with said curing agent to form a thermoset polymer; and c. a thermoplastic acrylic polymer which (1) is selected from the group consisting of addition polymers of esters of alpha-beta ethylenically unsaturated acids and interpolymers of esters of alpha-beta ethylenically unsaturated acids with other ethylenically unsaturated compounds; (2) is essentially non-curable with said aminoplast curing agent; (3) after curing of the primer composition, is soluble in solvents in which it was soluble before said curing; and d. hydroxyl-containing copolymer or interpolymer of vinyl halide and vinyl ester.
Claim 5
Dependent Claim
110 words
A primer composition comprising: a. an aminoplast curing agent produced from the condensation products of amines or amides with aldehydes; b. an oil-free saturated polyester having hydroxyl functionality which is curable with said curing agent to form a thermoset polymer; and c. a thermoplastic acrylic polymer which (1) is selected from the group consisting of addition polymers of esters of alpha-beta ethylenically unsaturated acids and interpolymers of esters of alpha-beta ethylenically unsaturated acids with other ethylenically unsaturated compounds; (2) is essentially non-curable with said aminoplast curing agent; (3) after curing of the primer composition, is soluble in solvents in which it was soluble before said curing; and d. epoxy resin.
Claim 6
Dependent Claim
110 words
A primer composition comprising: a. an aminoplast curing agent produced from the condensation products of amines or amides with aldehydes; b. an oil-free saturated polyester having hydroxyl functionality which is curable with said curing agent to form a thermoset polymer; and c. a thermoplastic acrylic polymer which (1) is selected from the group consisting of addition polymers of esters of alpha-beta ethylenically unsaturated acids and interpolymers of esters of alpha-beta ethylenically unsaturated acids with other ethylenically unsaturated compounds; (2) is essentially non-curable with said aminoplast curing agent; (3) after curing of the primer composition, is soluble in solvents in which it was soluble before said curing; and d. epoxy resin.
Claim 7
Dependent Claim
190 words
A primer composition comprising: a. from about 5 to about 40 percent by weight of an aminoplast curing agent produced from the condensation products of amines or amides with aldehydes; b. from about 40 to about 80 percent by weight of an oil-free saturated polyester having hydroxyl functionality which is curable with said curing agent to form a thermoset polymer; and p1 c. from about 2 to about 20 percent by weight of a thermoplastic acrylic polymer which (1) is selected from the group consisting of addition polymers of esters of alpha-beta ethylenically unsaturated acids and interpolymers of esters of alpha-beta ethylenically unsaturated acids with other ethylenically unsaturated compounds; (2) is essentially non-curable with said aminoplast curing agent; (3) after curing of the primer composition, is soluble in solvents in which it was soluble before said curing; d. from about 1 to about 15 percent by weight of cellulose acetate butyrate; e. from about 1 to about 10 percent by weight of a hydroxyl-containing copolymer or interpolymer of a vinyl halide and a vinyl ester; and f. from about 2 to about 10 percent by weight of an epoxy resin.
Claim 8
Dependent Claim
190 words
A primer composition comprising: a. from about 5 to about 40 percent by weight of an aminoplast curing agent produced from the condensation products of amines or amides with aldehydes; b. from about 40 to about 80 percent by weight of an oil-free saturated polyester having hydroxyl functionality which is curable with said curing agent to form a thermoset polymer; and p1 c. from about 2 to about 20 percent by weight of a thermoplastic acrylic polymer which (1) is selected from the group consisting of addition polymers of esters of alpha-beta ethylenically unsaturated acids and interpolymers of esters of alpha-beta ethylenically unsaturated acids with other ethylenically unsaturated compounds; (2) is essentially non-curable with said aminoplast curing agent; (3) after curing of the primer composition, is soluble in solvents in which it was soluble before said curing; d. from about 1 to about 15 percent by weight of cellulose acetate butyrate; e. from about 1 to about 10 percent by weight of a hydroxyl-containing copolymer or interpolymer of a vinyl halide and a vinyl ester; and f. from about 2 to about 10 percent by weight of an epoxy resin.
Claim 9
Dependent Claim
18 words
The primer composition of claim 4 wherein the epoxy resin is a glycidyl ether of a polyhydric phenol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |