Patent US4876302A successfully refreshed from Google Patents.
US4876302A
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US
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Polyurethane dispersions and the use thereof as finishing agents
Assignee: Bayer AG
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Filing: 1988-12-15
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Granted: 1989-10-24
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Expires: 2008-12-15
Abstract
Abstract The present invention is directed to aqueous coating compositions suitable for use as coating and finishing agents for surface coatings, preferably PVC or polyurethane coatings, based on sedimentation-stable polyurethane dispersions having a solids content of about 10-70% by weight wherein the polyurethane-urea solids material is based on polyester diols, low molecular weight diols and optionally triols, chemically incorporated hydrophilic groups, specific mixtures of diisocyanates and polyamine chain extenders having an average functionality of greater than 2 and wherein the aqueous preparations additionally contain alkoxylated dimethyl-polysiloxanes and water-soluble polyethylene oxides. The present invention is also directed to a process for applying top coats and finishes to surface coatings, preferably PVC or polyurethane surface coatings, wherein the above-described aqueous coating and finishing agents are used as the top coat and the coatings are cured at about 70°-170° C.
Inventors
- 👤 Klaus Noll
- 👤 Wilhelm Thoma
- 👤 Klaus Nachtkamp
- 👤 Walter Schroer
- 👤 Josef Pedain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:12
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/04; C09D175/06; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/10; C08G18/12; C08G18/28; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664; C08G18/6644; C08G18/6659; C08G18/70; C08G18/72; C08G18/721; C08G18/722; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/056; C08J2475/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
239 words
An aqueous coating composition based on polyurethane-ureas and having a solids content of about 10 to 70%, said polyurethane-ureas comprising the reaction product of ( A) about 35 to 55% by weight of a polyester diol having a molecular weight of about 500 to 5000, (B) about 6 to 15% by weight of a low molecular weight diol having from 2 to 10 carbon atoms ( C) about 1 5 to 15% by weight of an anionic group-containing and/or a non-ionic hydrophilic polyoxythylene unit-containing mono- or poly-functional compound with the proviso that any compound which satisfies the requirements of component (C) by containing an anionic group or a non-ionic hydrophilic polyoxythylene unit is included as component (C) and not as a part of components (A), (B), (D), (E), or (F), ( D) about 25 to 45% by weight of a diisocyanate corresponding to the formula ##STR4## wherein R 1 , R 2 and R 3 may be the same or different and represent hydrogen or a straight-chain or branched aliphatic hydrocarbon radical having from 1 to 4 carbon atoms, ( E) about 2 to 9% by weight of an aliphatic diisocyanate or cycloaliphatic diisocyanate other than (D) and ( F) about 0.2 to 4.0% by weight of a polyamine having an average functionally 222 and wherein the aqueous composition additionally contains in physical admixture an alkoxylated dimethyl-polysiloxane having 40 to 150 alkoxy groups and a water-soluble polythylene oxide derivative.
Claim 2
Dependent Claim
239 words
An aqueous coating composition based on polyurethane-ureas and having a solids content of about 10 to 70%, said polyurethane-ureas comprising the reaction product of ( A) about 35 to 55% by weight of a polyester diol having a molecular weight of about 500 to 5000, (B) about 6 to 15% by weight of a low molecular weight diol having from 2 to 10 carbon atoms ( C) about 1 5 to 15% by weight of an anionic group-containing and/or a non-ionic hydrophilic polyoxythylene unit-containing mono- or poly-functional compound with the proviso that any compound which satisfies the requirements of component (C) by containing an anionic group or a non-ionic hydrophilic polyoxythylene unit is included as component (C) and not as a part of components (A), (B), (D), (E), or (F), ( D) about 25 to 45% by weight of a diisocyanate corresponding to the formula ##STR4## wherein R 1 , R 2 and R 3 may be the same or different and represent hydrogen or a straight-chain or branched aliphatic hydrocarbon radical having from 1 to 4 carbon atoms, ( E) about 2 to 9% by weight of an aliphatic diisocyanate or cycloaliphatic diisocyanate other than (D) and ( F) about 0.2 to 4.0% by weight of a polyamine having an average functionally 222 and wherein the aqueous composition additionally contains in physical admixture an alkoxylated dimethyl-polysiloxane having 40 to 150 alkoxy groups and a water-soluble polythylene oxide derivative.
Claim 3
Dependent Claim
63 words
The aqueous coating composition of claim 1 wherein in said aqueous composition contains about 15 to 65% of solids based on (I) about 65 to 99.8% by polyurethane-ureas, (II) about 0.1 to 5% by weight of said alkoxylated dimethyl-polysiloxane and (III) about 0.1 to 10% by weight of a water soluble polyethylene oxide derivative, wherein the sum of (I) +(11) +(III) is >80%.
Claim 4
Dependent Claim
62 words
The aqueous coating composition of claim 1 wherein said aqueous composition contains about 20 to 45% solids based on (I) about 73 to 99% by weight of said polyurethane-ureas, (II) about 0.5 to 2% by weight of said alkoxylated dimethyl-polysiloxane and (III) about 0.5 to 5% by weight of a water-soluble polyethylene oxide derivative wherein the sum of (I) +(II)+(II)+is to >80%.
Claim 5
Dependent Claim
15 words
The aqueous coating composition of claim 1 wherein said alkoxylated dimethyl-polysiloxane is ethoxylated and/or propoxylated.
Claim 6
Dependent Claim
15 words
The aqueous coating composition of claim 2 wherein said alkoxylated dimethyl-polysiloxane is ethoxylated and/or propoxylated.
Claim 7
Dependent Claim
17 words
The aqueous coating composition of claim 1 wherein said water-soluble polyethylene oxide derivative is an alkoxylated alkylphenol.
Claim 8
Dependent Claim
17 words
The aqueous coating composition of claim 2 wherein said water-soluble polyethylene oxide derivative is an alkoxylated alkylphenol.
Claim 9
Dependent Claim
17 words
The aqueous coating composition of claim 4 wherein said water-soluble polyethylene oxide derivative is an alkoxylated alkylphenol.
Claim 10
Dependent Claim
17 words
The aqueous coating composition of claim 5 wherein said water-soluble polyethylene oxide derivative is an alkoxylated alkylphenol.
Claim 11
Dependent Claim
34 words
A process for the production of a top coat which comprises coating a surface coating with the aqueous coating composition of claim 1 and curing said coating at a temperature of about 70°-170° C.
Claim 12
Dependent Claim
29 words
The process of claim 10 wherein said surface coating is a PVC or polyurethane coating and said aqueous coating composition is cured at a temperature of about 90°-130° C.
Claim 13
Dependent Claim
37 words
The aqueous coating composition of claim 1 wherein component (C) is based on about 1 5 to 15 percent by weight of an anionic group-containing mono- or poly-functional compound and/or a non-ionic hydrophilic polyoxethylene unit-containing mono-functional compound.
Claim 14
Dependent Claim
32 words
The aqueous coating composition of claim 1 wherein said reaction product additionally comprises up to 8%, based on the weight of component (B), of a triol having 2 to 10 carbon atoms.
Claim 15
Dependent Claim
258 words
An aqueous coating composition based on polyurethane-ureas and having a solids content of about 10 to 70%, said polyurethane-ureas comprising the reaction product of (A) about 35 to 55% by weight of a polyester diol having a molecular weight of about 500 to 5000, (B) about 6 to 15% by weight of a low molecular weight diol having from 2 to 10 carbon atoms, (C) about 1.5 to 15% by weight of an anionic group-containing and/or a non-ionic hydrophilic polyoxyethlene unit-containing mono- or poly-functional compound with the proviso that any compound which satisfies the requirements of component (C) by containing an anionic group or a non-ionic hydrophilic polyoxyethylene unit is included as component (C) and not as a part of components (A), (B), (D), (E), or (F), (D) about 25 to 45% by weight of a diisocyanate corresponding to the formula ##STR5## wherein R 1 , R 2 and R 3 may be the same or different and represent hydrogen or a straight-chain or branched aliphatic hydrocarbon radical having from 1 to 4 carbon atoms, (E) about 2 to 9% by weight of an aliphatic diisocyanate or cycloaliphatic diisocyanate other than (D) and ( F) about 0.2 to 4.0% by weight of a polyamine having an average functionality >2 and wherein the aqueous composition additionally contains in physical admixture an alkoxylated dimethyl-polysiloxane having 65 to 150 alkoxy groups and a water-soluble polyethylene oxide derivative and wherein the weight of the alkoxy groups of said alkoxylated dimethyl-polysiloxane is equal to or greater than the weight of the dimethy-polysiloxane segment.
Claim 16
Dependent Claim
258 words
An aqueous coating composition based on polyurethane-ureas and having a solids content of about 10 to 70%, said polyurethane-ureas comprising the reaction product of (A) about 35 to 55% by weight of a polyester diol having a molecular weight of about 500 to 5000, (B) about 6 to 15% by weight of a low molecular weight diol having from 2 to 10 carbon atoms, (C) about 1.5 to 15% by weight of an anionic group-containing and/or a non-ionic hydrophilic polyoxyethlene unit-containing mono- or poly-functional compound with the proviso that any compound which satisfies the requirements of component (C) by containing an anionic group or a non-ionic hydrophilic polyoxyethylene unit is included as component (C) and not as a part of components (A), (B), (D), (E), or (F), (D) about 25 to 45% by weight of a diisocyanate corresponding to the formula ##STR5## wherein R 1 , R 2 and R 3 may be the same or different and represent hydrogen or a straight-chain or branched aliphatic hydrocarbon radical having from 1 to 4 carbon atoms, (E) about 2 to 9% by weight of an aliphatic diisocyanate or cycloaliphatic diisocyanate other than (D) and ( F) about 0.2 to 4.0% by weight of a polyamine having an average functionality >2 and wherein the aqueous composition additionally contains in physical admixture an alkoxylated dimethyl-polysiloxane having 65 to 150 alkoxy groups and a water-soluble polyethylene oxide derivative and wherein the weight of the alkoxy groups of said alkoxylated dimethyl-polysiloxane is equal to or greater than the weight of the dimethy-polysiloxane segment.
Claim 17
Dependent Claim
36 words
The aqueous coating composition of claim 14 wherein component (C) is based on about 1.5 to 15 percent by weight of an anionic group-containing mono- or poly-functional compound and/or a non-ionic hydrophilic polyoxyethlene unit-containing mono-functional compound.
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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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |