US5126170A
Expired / Lapsed
US
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Process for the production of polyurethane coatings
Assignee: Bayer Corp
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Filing: 1990-06-19
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Granted: 1992-06-30
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Expires: 2010-06-19
Abstract
Abstract The present invention relates to a process for the preparation of a polyurethane coating by coating a substrate with a coating composition containing a) a polyisocyanate component and b) an isocyanate-reactive component containing at least one compound corresponding to the formula <IMAGE> (I) wherein X represents an organic group which has a valency of n and is inert towards isocyanate groups at a temperature of 100 DEG C. or less, R1 and R2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100 DEG C. or less, R3 and R4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100 DEG C. or less and n represents an integer with a value of at least 2, and curing the coating composition at a temperature of 100 DEG C. or less.
Inventors
- 👤 Christian Zwiener
- 👤 Josef Pedain
- 👤 Lothar Kahl
- 👤 Klaus Nachtkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C08G18/30; C08G18/38; C08G18/3819; C08G18/3821; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; C08G18/79; C08G18/791; C08G18/792
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
A process for preparing a polyurethane coating which comprises coating a substrate with a coating composition comprising a) a polyisocyanate component and b) an isocyanate-reactive component comprising at least one compound corresponding to the formula ##STR5## wherein X represents an organic group obtained by removing the amino groups from 1,4-diaminobutane, 1,6-diaminohexane, 2,2,4- and/or 2,4,4-trimethyl-1,6-diaminohexane, 1-amino-3,3,5-trimethyl-5-aminomethyl-cyclohexane, 4,4'-diaminodicyclohexyl methane or 3,3'-dimethyl-4,4'-diamino-dicyclohexyl methane, R 1 and R 2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100° C. or less, R 3 and R 4 represent hydrogen and n represents 2, and hardening said composition at a temperature of 10° to 80° C.
Claim 2
Dependent Claim
111 words
A process for preparing a polyurethane coating which comprises coating a substrate with a coating composition comprising a) a polyisocyanate component and b) an isocyanate-reactive component comprising at least one compound corresponding to the formula ##STR5## wherein X represents an organic group obtained by removing the amino groups from 1,4-diaminobutane, 1,6-diaminohexane, 2,2,4- and/or 2,4,4-trimethyl-1,6-diaminohexane, 1-amino-3,3,5-trimethyl-5-aminomethyl-cyclohexane, 4,4'-diaminodicyclohexyl methane or 3,3'-dimethyl-4,4'-diamino-dicyclohexyl methane, R 1 and R 2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100° C. or less, R 3 and R 4 represent hydrogen and n represents 2, and hardening said composition at a temperature of 10° to 80° C.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein R 1 and R 2 represent a methyl or ethyl group.
Claim 4
Dependent Claim
87 words
The process of claim 1 wherein component b) additionally comprises a copolymer which is prepared from a hydroxyalkyl ester of acrylic acid and/or methacrylic acid and another olefinically unsaturated monomer, has a molecular weight (M n ) of about 800 to 50,000 and a hydroxyl group content of about 0.1 to 12% by weight, and is present in an amount sufficient to provide a positive amount of up to 20 hydroxyl groups of said copolymer for each amino group provided by a compound corresponding to formula I.
Claim 5
Dependent Claim
87 words
The process of claim 2 wherein component b) additionally comprises a copolymer which is prepared from a hydroxyalkyl ester of acrylic acid and/or methacrylic acid and another olefinically unsaturated monomer, has a molecular weight (M n ) of about 800 to 50,000 and a hydroxyl group content of about 0.1 to 12% by weight, and is present in an amount sufficient to provide a positive amount of up to 20 hydroxyl groups of said copolymer for each amino group provided by a compounds corresponding to formula I.
Claim 6
Dependent Claim
37 words
The process of claim 1 that the proportions of components a) and b) are calculated to provide an equivalent ratio of isocyanate groups of component a) to isocyanate-reactive groups of component b) of about 0.8:1 to 20:1.
Claim 7
Dependent Claim
34 words
The process of claim 1 wherein said coating composition additionally comprises a solvent in an amount sufficient to provide a weight ratio of components a) and b) to solvent of about 60:40 to 90:10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |