US4049745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly reactive sulphur-containing coating agents hardening under UV-light
Assignee: Bayer AG
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Filing: 1976-07-22
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Granted: 1977-09-20
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Expires: 1996-07-22
Abstract
Abstract An air-drying coating composition comprising a reaction product of a polyepoxide with more than one 1,2-epoxide group per molecule, at least 60% of whose epoxide groups have been reacted A. WITH 0.01 TO 0.6 SH-equivalents, based on one epoxide equivalent of hydrogen sulphide, an aliphatic or cycloaliphatic, aromatic or araliphatic dithiol or polythiol or with a mixture thereof, and subsequently B. WITH 0.99 TO 0.4 CARBOXYL EQUIVALENTS, BASED ON ONE EPOXIDE EQUIVALENT, OF ACRYLIC OR METHACRYLIC ACID OR OF A MIXTURE THEREOF.
Inventors
- 👤 Karl Ernst Schuster
- 👤 Hans Jurgen Rosenkranz
- 👤 Hans Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:31
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08G59/18; C08G59/40; C08G59/66; C09; C09D; C09D163/00; C09D163/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A process for the production of a reaction product of a polyepoxide and an α,β-monoolefinically unsaturated carboxylic acid, wherein at least 60% of the epoxide groups of a polyepoxide with more than one 1,2-epoxide group per molecule are reacted a. with 0.01 to 0.6 SH-equivalents, based on one epoxide equivalent, of hydrogen sulphide, an aliphatic cycloaliphatic aromatic or araliphatic dithiol or polythiol or with a mixture thereof, and subsequently b. with 0.99 to 0.4 carboxyl equivalents, based on one epoxide equivalent, of acrylic or methacrylic acid or of a mixture thereof.
Claim 2
Dependent Claim
91 words
A process for the production of a reaction product of a polyepoxide and an α,β-monoolefinically unsaturated carboxylic acid, wherein at least 60% of the epoxide groups of a polyepoxide with more than one 1,2-epoxide group per molecule are reacted a. with 0.01 to 0.6 SH-equivalents, based on one epoxide equivalent, of hydrogen sulphide, an aliphatic cycloaliphatic aromatic or araliphatic dithiol or polythiol or with a mixture thereof, and subsequently b. with 0.99 to 0.4 carboxyl equivalents, based on one epoxide equivalent, of acrylic or methacrylic acid or of a mixture thereof.
Claim 3
Dependent Claim
82 words
An air-drying coating composition comprising a reaction product of a polyepoxide with more than one 1,2-epoxide group per molecule, at least 60% of whose epoxide groups have been reacted a. with 0.01 to 0.6 SH-equivalents, based on one epoxide equivalent, of hydrogen sulphide, an aliphatic or cycloaliphatic, aromatic or araliphatic dithiol or polythiol or with a mixture thereof, and subsequently b. with 0.99 to 0.4 carboxyl equivalents, based on one epoxide equivalent, of acrylic or methacrylic acid or of a mixture thereof.
Claim 4
Dependent Claim
82 words
An air-drying coating composition comprising a reaction product of a polyepoxide with more than one 1,2-epoxide group per molecule, at least 60% of whose epoxide groups have been reacted a. with 0.01 to 0.6 SH-equivalents, based on one epoxide equivalent, of hydrogen sulphide, an aliphatic or cycloaliphatic, aromatic or araliphatic dithiol or polythiol or with a mixture thereof, and subsequently b. with 0.99 to 0.4 carboxyl equivalents, based on one epoxide equivalent, of acrylic or methacrylic acid or of a mixture thereof.
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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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |