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US4530976A
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US
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Flexible uni-basecoat/two component clearcoat coating compositions
Assignee: EIDP Inc
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Filing: 1983-10-13
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Granted: 1985-07-23
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Expires: 2003-10-13
Abstract
Abstract PCT No. PCT/US83/01604 Sec. 371 Date Oct. 13, 1983 Sec. 102(e) Date Oct. 13, 1983 PCT Filed Oct. 13, 1983 PCT Pub. No. WO85/01737 PCT Pub. Date Apr. 25, 1985.This invention is directed to flexible basecoat/clearcoat coating systems which have excellent adherence to metal and plastic substrates and possess superior weathering properties. The clearcoat and basecoat composition comprises hydroxy-containing urethane modified polyester, made by reacting a urethane modified diol with polyol and diacid component, and crosslinking agent. The crosslinking agent of the pigmented basecoat composition comprises amine-aldehyde crosslinking agent. The crosslinking agent of the clearcoat comprises polyisocyanate crosslinking agent. Optionally, either or both compositions may comprise a high molecular weight linear polyurethane.
Inventors
- 👤 Panagiotis I. Kordomenos
- 👤 Kenneth R. Kurple
- 👤 Delores J. Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:15
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/04; C09D175/06; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/83; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31605
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
208 words
A flexible basecoat/clearcoat coating composition, useful as automotive finish coats on metal and plastic substrates, which is characterized in that the basecoat composition and the clearcoat composition each independently comprises: (A) hydroxy-containing urethane modified polyester (i) having a number average molecular weight (M n ) of between about 1000 and about 10,000, (ii) having a hydroxyl number of between about 30 and about 200, and (iii) containing between about 1 and about 10 urethane groups per molecule, and being made from reactants comprising: (1) urethane modified diol made by reacting: (a) diol, and (b) diisocyanate, wherein said diol and said diisocyanate are reacted in a molar ratio of from about 4:1 to about 4:3; (2) polyol comprising at least about 5 weight percent triol; and (3) acid component selected from dicarboxylic acids and anhydrides thereof; and (B) crosslinking agent; and (C) 0-60 weight percent, based on the total weight of (A) and (B) of the composition, of a linear polyurethane having a number average molecular weight of between about 15,000 and about 40,000, and wherein said crosslinking agent of said clearcoat composition is a polyisocyanate crosslinking agent and said crosslinking agent of said basecoat composition is an amine-aldehyde crosslinking agent, and wherein said basecoat composition additionally comprises pigment.
Claim 2
Dependent Claim
208 words
A flexible basecoat/clearcoat coating composition, useful as automotive finish coats on metal and plastic substrates, which is characterized in that the basecoat composition and the clearcoat composition each independently comprises: (A) hydroxy-containing urethane modified polyester (i) having a number average molecular weight (M n ) of between about 1000 and about 10,000, (ii) having a hydroxyl number of between about 30 and about 200, and (iii) containing between about 1 and about 10 urethane groups per molecule, and being made from reactants comprising: (1) urethane modified diol made by reacting: (a) diol, and (b) diisocyanate, wherein said diol and said diisocyanate are reacted in a molar ratio of from about 4:1 to about 4:3; (2) polyol comprising at least about 5 weight percent triol; and (3) acid component selected from dicarboxylic acids and anhydrides thereof; and (B) crosslinking agent; and (C) 0-60 weight percent, based on the total weight of (A) and (B) of the composition, of a linear polyurethane having a number average molecular weight of between about 15,000 and about 40,000, and wherein said crosslinking agent of said clearcoat composition is a polyisocyanate crosslinking agent and said crosslinking agent of said basecoat composition is an amine-aldehyde crosslinking agent, and wherein said basecoat composition additionally comprises pigment.
Claim 3
Dependent Claim
32 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein said hydroxy-containing urethane modified polyester of said clearcoat composition has a number average molecular weight of between about 2000 and about 4000.
Claim 4
Dependent Claim
30 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein said hydroxy-containing urethane modified polyester of said clearcoat composition has a hydroxyl number of between about 50 and about 120.
Claim 5
Dependent Claim
38 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein in forming said urethane modified diol of said clearcoat composition said diol and said diisocyanate are reacted in a molar ratio of from about 2:0.8 to about 2:1.2.
Claim 6
Dependent Claim
19 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein said polyol of said clearcoat composition further comprises diol.
Claim 7
Dependent Claim
25 words
A coating composition according to claim 5, wherein said polyol of said clearcoat comprises about 10-80 weight percent triol and about 90-20 weight percent diol.
Claim 8
Dependent Claim
25 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein said dicarboxylic acids of said clearcoat composition comprise C 6 -C 12 aliphatic dicarboxylic acid.
Claim 9
Dependent Claim
46 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein said polyisocyanate crosslinking agent is included in said clearcoat composition in an amount of between about 5 and about 60 weight percent based on the weight of the hydroxy-containing urethane modified polyesters of the clearcoat composition.
Claim 10
Dependent Claim
19 words
A coating composition according to claim 1, wherein said polyisocyanate crosslinking agent of said clearcoat composition is a diisocyanate.
Claim 11
Dependent Claim
24 words
A coating composition according to claim 1, wherein said polyisocyanate crosslinking agent of said clearcoat composition has 3 or more reactive isocyanates per molecule.
Claim 12
Dependent Claim
20 words
A coating composition according to claim 10, wherein said polyisocyanate crosslinking agent is a trimerized product of an aliphatic diisocyanate.
Claim 13
Dependent Claim
21 words
A coating composition according to claim 11, wherein said polyisocyanate crosslinking agent is a trimerized reaction product of 1,6 hexamethylene diisocyanate.
Claim 14
Dependent Claim
19 words
A coating composition according to claim 10, wherein said polyisocyanate crosslinking agent is a polyisocyanate having a biuret structure.
Claim 15
Dependent Claim
34 words
A flexible basecoat/clearcoat composition according to claim 1, wherein said hydroxy-containing urethane modified polyester of said basecoat composition has a number average molecular weight (M n ) of between about 2000 and about 4000.
Claim 16
Dependent Claim
38 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein in forming said urethane modified diol of said basecoat composition said diol and said diisocyanate are reacted in a molar ratio of from about 2:0.8 to about 2:1.2.
Claim 17
Dependent Claim
19 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein said polyol of said basecoat composition further comprises diol.
Claim 18
Dependent Claim
28 words
A flexible basecoat/clearcoat coating composition according to claim 16, wherein said polyol of said basecoat composition comprises about 10-80 weight percent triol and about 90-20 weight percent diol.
Claim 19
Dependent Claim
25 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein said dicarboxylic acids of said basecoat composition comprise C 6 -C 12 aliphatic dicarboxylic acids.
Claim 20
Dependent Claim
46 words
A flexible basecoat/clearcoat coating composition according to claim 1, wherein said amine-aldehyde crosslinking agent of said basecoat composition is employed in an amount of from about 5 to about 60 weight percent based on the weight of said hydroxy-containing modified polyester present in said basecoat composition.
Claim 21
Dependent Claim
34 words
A flexible basecoat/clearcoat composition according to claim 1, wherein said hydroxy-containing urethane modified polyester of said basecoat composition has a number average molecular weight (M n ) of between about 2000 and about 4000.
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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) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |