US4565730A
Expired / Lapsed
US
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Coating composition, in particular for producing a transparent topcoat of a multilayer coating, a process for producing coatings, and an article coated with a multilayer coating
Assignee: BASF Farben und Fasern AG
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Filing: 1984-06-14
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Granted: 1986-01-21
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Expires: 2004-06-14
Abstract
Abstract A coating composition, in particular for producing the transparent topcoat of a multilayer coating. The coating composition contains as binders two acrylic polymers, A and B, as well as aliphatic and/or cycloaliphatic polyisocyanates. Acrylic polymer A has a molecular weight of 800 to 4,000, a hydroxyl number of 80 to 180 and a glass transition temperature of below -10 DEG C. Acrylic polymer B has a molecular weight of 3,000 to 10,000, a hydroxyl number of 40 to 120 and a glass transition temperature of -10 DEG C. to +10 DEG C. Whereas in acrylic polymer A the proportion of acrylic acid esters predominates, polymer B contains methacrylic acid esters as predominant monomer components.
Inventors
- 👤 Ulrich Poth
- 👤 Fritz Bartol
- 👤 Adolf Machholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:21
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
136 words
A binder for coating compositions applied as transparent topcoats of multilayer coatings in the wet-on-wet method, consisting essentially of: (A) 50 to 90% by weight, based on total acrylic polymers, of a first acrylic polymer having a molecular weight of 800 to 4,000; a hydroxyl number of 80 to 180; and a glass transition temperature below -10° C.; (B) 10 to 50% by weight, based on total acrylic polymers, of a second acrylic polymer having a molecular weight of 3,000 to 10,000; a hydroxyl number of 40 to 120; and a glass transition temperature of -10° C. to +70° C.; and (C) polyisocyanates selected from the group consisting of aliphatic polyisocyanates, cycloaliphatic polyisocyanates, and mixtures thereof in a sufficient amount that there are 0.8 to 1.3 isocyanate groups per hydroxyl group of components (A) and (B).
Claim 2
Dependent Claim
136 words
A binder for coating compositions applied as transparent topcoats of multilayer coatings in the wet-on-wet method, consisting essentially of: (A) 50 to 90% by weight, based on total acrylic polymers, of a first acrylic polymer having a molecular weight of 800 to 4,000; a hydroxyl number of 80 to 180; and a glass transition temperature below -10° C.; (B) 10 to 50% by weight, based on total acrylic polymers, of a second acrylic polymer having a molecular weight of 3,000 to 10,000; a hydroxyl number of 40 to 120; and a glass transition temperature of -10° C. to +70° C.; and (C) polyisocyanates selected from the group consisting of aliphatic polyisocyanates, cycloaliphatic polyisocyanates, and mixtures thereof in a sufficient amount that there are 0.8 to 1.3 isocyanate groups per hydroxyl group of components (A) and (B).
Claim 3
Dependent Claim
100 words
The binder of claim 1, wherein component A is prepared from: (a 1 ) 75 to 100% by weight of acrylic acid esters; (a 2 ) 0 to 25% by weight of methacrylic acid esters, a sufficient proportion of components a 1 and a 2 being hydroxyalkyl acrylates or hydroxyalkyl methacrylates that the hydroxyl number of 80 to 180 is reached; (a 3 ) 0 to 15% by weight of comonomers having aromatic groups; and (a 4 ) 0 to 2% by weight of α,β-ethylenically unsaturated acids, the proportions of components a 1 to a 4 adding up to 100%.
Claim 4
Dependent Claim
100 words
The binder of claim 2, wherein component B is prepared from: (b 1 ) 0 to 30% by weight of acrylic acid esters; (b 2 ) 70 to 90% by weight of methacrylic acid esters, a sufficient proportion of components b 1 and b 2 being hydroxyalkyl acrylates or hydroxyalkyl methacrylates that the hydroxyl number of 40 to 120 is reached; (b 3 ) 0 to 30% by weight of comonomers having aromatic groups; and (b 4 ) 0 to 3% by weight of α,β-ethylenically unsaturated acids, the proportions of components b 1 to b 4 adding up to 100%.
Claim 5
Dependent Claim
179 words
In a process for applying a multilayer coating comprising applying at least one pigment containing base coat to a substrate, air drying the base coat, applying at least one transparent top coating to said base coating by the wet-on-wet method and hardening said coatings, the improvement comprising said transparent top coating applied from a coating composition having a binder consisting essentially of: (A) 50 to 90% by weight, based on total acrylic polymers, of a first acrylic polymer having a molecular weight of 800 to 4,000; a hydroxyl number of 80 to 180; and a glass transition temperature below -10° C.; (B) 10 to 50% by weight, based on total acrylic polymers, of a second acrylic polymer having a molecular weight of 3,000 to 10,000; a hydroxyl number of 40 to 120; and a glass transition temperature of -10° C. to +70° C.; and (C) polyisocyantes selected from the group consisting of aliphatic polyisocyanates, cycloaliphatic polyisocyantes, and mixtures thereof in a sufficient amount that there are 0.8 to 1.3 isocyanate groups per hydroxyl group of components (A) and (B).
Claim 6
Dependent Claim
179 words
In a process for applying a multilayer coating comprising applying at least one pigment containing base coat to a substrate, air drying the base coat, applying at least one transparent top coating to said base coating by the wet-on-wet method and hardening said coatings, the improvement comprising said transparent top coating applied from a coating composition having a binder consisting essentially of: (A) 50 to 90% by weight, based on total acrylic polymers, of a first acrylic polymer having a molecular weight of 800 to 4,000; a hydroxyl number of 80 to 180; and a glass transition temperature below -10° C.; (B) 10 to 50% by weight, based on total acrylic polymers, of a second acrylic polymer having a molecular weight of 3,000 to 10,000; a hydroxyl number of 40 to 120; and a glass transition temperature of -10° C. to +70° C.; and (C) polyisocyantes selected from the group consisting of aliphatic polyisocyanates, cycloaliphatic polyisocyantes, and mixtures thereof in a sufficient amount that there are 0.8 to 1.3 isocyanate groups per hydroxyl group of components (A) and (B).
Claim 7
Dependent Claim
100 words
The process of claim 4, wherein component A is prepared from: (a 1 ) 75 to 100% by weight of acrylic acid esters; (a 2 ) 0 to 25% by weight of methacrylic acid esters, a sufficient proportion of components a 1 and a 2 being hydroxyalkyl acrylates or hydroxyalkyl methacrylates that the hydroxyl number of 80 to 180 is reached; (a 3 ) 0 to 15% by weight of comonomers having aromatic groups; and (a 4 ) 0 to 2% by weight of α,β-ethylenically unsaturated acids, the proportions of components a 1 to a 4 adding up to 100%.
Claim 8
Dependent Claim
100 words
The process of claim 5, wherein Component B is prepared from: (b 1 ) 0 to 30% by weight of acrylic acid esters; (b 2 ) 70 to 90% by weight of methacrylic acid esters, a sufficient proportion of components b 1 and b 2 being hydroxylalkyl acrylates or hydroxyalkyl methacrylates that the hydroxyl number of 40 to 120 is reached; (b 3 ) 0 to 30% by weight of comonomers having aromatic groups; and (b 4 ) 0 to 3% by weight of α,β-ethylenically unsaturated acids, the proportions of components b 1 to b 4 adding up to 100%.
Claim 9
Dependent Claim
170 words
In a multilayer coated article having a substrate, at least one pigment containing base coat applied to said substrate and at least one transparent top coating applied to said base coating by the wet-on-wet method, the improvement comprising said transparent top coating applied from a coating composition having a binder consisting essentially of: (A) 50 to 90% by weight, based on total acrylic polymers, of a first acrylic polymer having a molecular weight of 800 to 4,000; a hydroxyl number of 80 to 180; and a glass transition temperature below -10° C.; (B) 10 to 50% by weight, based on total acrylic polymers, of a second acrylic polymer having a molecular weight of 3,000 to 10,000; a hydroxyl number of 40 to 120; and a glass transition temperature of -10° C. to +70° C.; and (C) polyisocyanates selected from the group consisting of aliphatic polyisocyanates, cycloaliphatic polyisocyanates, and mixtures thereof in a sufficient amount that there are 0.8 to 1.3 isocyanate groups per hydroxyl group of components (A) and (B).
Claim 10
Dependent Claim
170 words
In a multilayer coated article having a substrate, at least one pigment containing base coat applied to said substrate and at least one transparent top coating applied to said base coating by the wet-on-wet method, the improvement comprising said transparent top coating applied from a coating composition having a binder consisting essentially of: (A) 50 to 90% by weight, based on total acrylic polymers, of a first acrylic polymer having a molecular weight of 800 to 4,000; a hydroxyl number of 80 to 180; and a glass transition temperature below -10° C.; (B) 10 to 50% by weight, based on total acrylic polymers, of a second acrylic polymer having a molecular weight of 3,000 to 10,000; a hydroxyl number of 40 to 120; and a glass transition temperature of -10° C. to +70° C.; and (C) polyisocyanates selected from the group consisting of aliphatic polyisocyanates, cycloaliphatic polyisocyanates, and mixtures thereof in a sufficient amount that there are 0.8 to 1.3 isocyanate groups per hydroxyl group of components (A) and (B).
Claim 11
Dependent Claim
101 words
The coated article of claim 7, wherein component A is prepared from: (a 1 ) 75 to 100% by weight of acrylic acid esters; (a 2 ) 0 to 25% by weight of methacrylic acid esters, a sufficient proportion of components a 1 and a 2 being hydroxyalkyl acrylates or hydroxyalkyl methacrylates that the hydroxyl number of 80 to 180 is reached; (a 3 ) 0 to 15% by weight of comonomers having aromatic groups; and (a 4 ) 0 to 2% by weight of α,β-ethylenically unsaturated acids, the proportions of components a 1 to a 4 adding up to 100%.
Claim 12
Dependent Claim
101 words
The coated article of claim 8, wherein component B is prepared from: (b 1 ) 0 to 30% by weight of acrylic acid esters; (b 2 ) 70 to 90% by weight of methacrylic acid esters, a sufficient proportion of components b 1 and b 2 being hydroxyalkyl acrylates or hydroxyalkyl methacrylates that the hydroxyl number of 40 to 120 is reached; (b 3 ) 0 to 30% by weight of comonomers having aromatic groups; and (b 4 ) 0 to 3% by weight of α,β-ethylenically unsaturated acids, the proportions of components b 1 to b 2 adding up to 100%.
Claim 13
Dependent Claim
63 words
The binder of claim 3, wherein: (a 1 ) is 75 to 96%; (a 2 ) is 2 to 25%; (a 3 ) is 2 to 15%; (a 4 ) is 0.2 to 2%; (b 1 ) is 2 to 30%; (b 2 ) is 60 to 96%; (b 3 ) is 2 to 30%; and (b 4 ) is 0.2 to 2%.
Claim 14
Dependent Claim
63 words
The process of claim 6, wherein: (a 1 ) is 75 to 96%; (a 2 ) is 2 to 25%; (a 3 ) is 2 to 15%; (a 4 ) is 0.2 to 2%; (b 1 ) is 2 to 30%; (b 2 ) is 60 to 96%; (b 3 ) is 2 to 30%; and (b 4 ) is 0.2 to 2%.
Claim 15
Dependent Claim
64 words
The coated article of claim 9, wherein: (a 1 ) is 75 to 96%; (a 2 ) is 2 to 25%; (a 3 ) is 2 to 15%; (a 4 ) is 0.2 to 2%; (b 1 ) is 2 to 30%; (b 2 ) is 60 to 96%; (b 3 ) is 2 to 30%; and (b 4 ) is 0.2 to 2%.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |