Patent US4956240A successfully refreshed from Google Patents.
US4956240A
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Use of polysiloxanes containing amino groups as additives in coatings for plastics
Assignee: Bayer AG
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Filing: 1989-01-24
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Granted: 1990-09-11
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Expires: 2009-01-24
Abstract
Abstract The present invention relates to the use of polysiloxanes containing amino groups as additives for improving levelling and wetting of polyurethane-based coating compositions applied to plastic substrates. The present invention additionally relates to the coated plastic substrates.
Inventors
- 👤 John L. Williams
- 👤 Reinhold Dederichs
- 👤 Ottfried Schlak
- 👤 Karl H. Kasler
- 👤 Ulrich Grigo
- 👤 Werner Nouvertne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:15
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C09; C09D; C09D175/00; C09D175/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
51 words
A process for coating a plastic substrate which comprises applying to a plastic substrate a polyurethane coating composition comprising (i) a polyurethane dissolved in an organic solvent and (ii) a polysiloxane containing amino groups in order to improve the levelling and wetting of said polyurethane coating composition on said plastic substrate.
Claim 2
Dependent Claim
51 words
A process for coating a plastic substrate which comprises applying to a plastic substrate a polyurethane coating composition comprising (i) a polyurethane dissolved in an organic solvent and (ii) a polysiloxane containing amino groups in order to improve the levelling and wetting of said polyurethane coating composition on said plastic substrate.
Claim 3
Dependent Claim
209 words
The process of claim 1 wherein said polysiloxane contains structural units corresponding to formula I to VI ##STR4## wherein R 1 independently of each other represent an alkyl group containing 1 to 6 carbon atoms, a vinyl group or a phenyl group, R 2 represents an amino group-containing alkyl or aryl radical containing primary, secondary or tertiary amino groups and a total of 2 to 20 carbon atoms, R 3 represents an alkyl group containing 1 to 6 carbon atoms, R 4 represents a C 1 -C 6 alkyl radical, a phenyl group, a C 2 -C 20 aminoalkyl group or mixtures there, m, q and x are the same or different and represent whole or (on a statistical average) a fractional number from 0 to 5, the sum of m+n+p being a whole or (on a statistical average) a fractional number of 1 to 20 and y is a whole or (on a statistical average) a fractional number from 10 to 1400, provided that the substituents and the values of the indices are selected to provide a molecular weight of the polysiloxane of about 400 to 110,000 and a nitrogen content in the form of primary, secondary or tertiary amino groups of about 0.01 to 6% by weight.
Claim 4
Dependent Claim
27 words
The process of claim 2 wherein said polysiloxane has a molecular weight of about 1000 to 10,000 and a nitrogen content of 0.05 to 1% by weight.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein said polyurethane coating composition comprises a physically drying, fully reacted polyurethane soluble in organic solvents.
Claim 6
Dependent Claim
21 words
The process of claim 2 wherein said polyurethane coating composition comprises a physically drying, fully reacted polyurethane soluble in organic solvents.
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein said polyurethane coating composition comprises a two-component system based on a polyisocyanate component and a polyhydroxyl component.
Claim 8
Dependent Claim
27 words
The process of claim 1 wherein said polyurethane coating composition comprises a one-component system based on a polyisocyanate component containing blocked isocyanate groups and a polyhydroxyl component.
Claim 9
Dependent Claim
29 words
The process of claim 1 wherein said polysiloxane is present in a quantity of about 0.1 to 5% by weight, based on the weight of said polyurethane coating composition.
Claim 10
Dependent Claim
29 words
The process of claim 4 wherein said polysiloxane is present in a quantity of about 0.1 to 5% by weight, based on the weight of said polyurethane coating composition.
Claim 11
Dependent Claim
29 words
The process of claim 1 wherein said polysiloxane is present in an amount of about 0.5 to 2% by weight, based on the weight of said polyurethane coating composition.
Claim 12
Dependent Claim
53 words
A coated plastic which is prepared by a process which comprises applying to a plastic substrate a polyurethane coating composition comprising (i) a polyurethane dissolved in an organic solvent and (ii) a polysiloxane containing amino groups in order to improve the levelling and wetting of said polyurethane coating composition on said plastic substrate.
Claim 13
Dependent Claim
53 words
A coated plastic which is prepared by a process which comprises applying to a plastic substrate a polyurethane coating composition comprising (i) a polyurethane dissolved in an organic solvent and (ii) a polysiloxane containing amino groups in order to improve the levelling and wetting of said polyurethane coating composition on said plastic substrate.
Claim 14
Dependent Claim
210 words
The coated substrate of claim 11 wherein said polysiloxane contains structural units corresponding to formula I to VI ##STR5## wherein R 1 independently of each other represent an alkyl group containing 1 to 6 carbon atoms, a vinyl group or a phenyl group, R 2 represents an amino group-containing alkyl or aryl radical containing primary, secondary or tertiary amino groups and a total of 2 to 20 carbon atoms, R 3 represents an alkyl group containing 1 to 6 carbon atoms, R 4 represents a C 1 -C 6 alkyl radical, a phenyl group, a C 2 -C 20 aminoalkyl group or mixtures there, m, q and x are the same or different and represent whole or (on a statistical average) a fractional number from 0 to 5, the sum of m+n+p being a whole or (on a statistical average) a fractional number of 1 to 20 and y is a whole or (on a statistical average) a fractional number from 10 to 1400, provided that the substituents and the values for the indices are selected to provide a molecular weight of the polysiloxane of about 400 to 110,000 and a nitrogen content in the form of primary, secondary or tertiary amino groups of about 0.01 to 6% by weight.
Claim 15
Dependent Claim
28 words
The coated substrate of claim 12 wherein said polysiloxane has a molecular weight of about 1000 to 10,000 and a nitrogen content of 0.05 to 1% by weight.
Claim 16
Dependent Claim
22 words
The coated substrate of claim 11 wherein said polyurethane coating composition comprises a physically drying, fully reacted polyurethane soluble in organic solvents.
Claim 17
Dependent Claim
22 words
The coated substrate of claim 12 wherein said polyurethane coating composition comprises a physically drying, fully reacted polyurethane soluble in organic solvents.
Claim 18
Dependent Claim
24 words
The coated substrate of claim 11 wherein said polyurethane coating composition comprises a two-component system based on a polyisocyanate component and a polyhydroxyl component.
Claim 19
Dependent Claim
28 words
The coated substrate of claim 11 wherein said polyurethane coating composition comprises a one-component system based on a polyisocyanate component containing blocked isocyanate groups and a polyhydroxyl component.
Claim 20
Dependent Claim
30 words
The coated substrate of claim 11 wherein said polysiloxane is present in a quantity of about 0.1 to 5% by weight, based on the weight of said polyurethane coating composition.
Claim 21
Dependent Claim
30 words
The coated substrate of claim 14 wherein said polysiloxane is present in a quantity of about 0.1 to 5% by weight, based on the weight of said polyurethane coating composition.
Claim 22
Dependent Claim
28 words
The coated substrate of claim 11 wherein said polysiloxane is present in an amount of about 0.5 by weight, based on the weight of said polyurethane coating composition.
Claim 23
Dependent Claim
13 words
The process of claim 1 wherein said plastic substrate is a polysiloxane-modified polycarbonate.
Claim 24
Dependent Claim
14 words
The coated plastic of claim 11 wherein said plastic substrate is a polysiloxane-modified polycarbonate.
References Cited (Backward Citations)
US4373043A
Cited
US4722951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |