US4031290A
Expired / Lapsed
US
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Mercaptan blocked thermosetting copolymers
Assignee: PPG Industries Inc
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Filing: 1976-09-20
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Granted: 1977-06-21
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Expires: 1996-09-20
Abstract
Abstract Block copolymers can be prepared by reacting a polyester resin or a polyol with a hydroxyl or carboxyl functional mercaptan and subsequently reacting the mercapto-blocked polyester or polyol in the presence of peroxygen-type or azo-type catalyst, with selected alpha, beta-ethylenically unsaturated monomer(s), such as diacetone acrylamide, acrylic acid, methacrylic acid, ethyl acrylate, butyl acrylate, styrene, methyl methacrylate, methacrylonitrile and the like. Such block copolymers provide for coating compositions having physical properties which provide for useful protective and decorative films.
Inventors
- 👤 Carl Clement Anderson
- 👤 Rostyslaw Dowbenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:04
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6882; C08F; C08F293/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31855
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
65 words
A polymer prepared by the process comprising: a. reacting 1. a polyester and 2. a mercaptan comprising an organic compound containing an --SH group and another group which is reactive with said polyester to provide a mercapto-terminated reaction product; b. reacting said mercapto-terminated reaction product with one or more ethylenically unsaturated monomers in the presence of a peroxygen or azo catalyst to form said polymer.
Claim 2
Dependent Claim
65 words
A polymer prepared by the process comprising: a. reacting 1. a polyester and 2. a mercaptan comprising an organic compound containing an --SH group and another group which is reactive with said polyester to provide a mercapto-terminated reaction product; b. reacting said mercapto-terminated reaction product with one or more ethylenically unsaturated monomers in the presence of a peroxygen or azo catalyst to form said polymer.
Claim 3
Dependent Claim
21 words
A polymer as in claim 1 wherein the polyester resin is prepared by reacting a polyhydric alcohol and a polybasic acid.
Claim 4
Dependent Claim
26 words
A polymer as in claim 2 wherein the polyhydric alcohol is a member of the group consisting of ethylene glycol, trimethylolpropane, neopentyl glycol, glycerol, and pentaerythritol.
Claim 5
Dependent Claim
27 words
A polymer as in claim 2 wherein the polybasic acid is a member of the group consisting of maleic acid, isophthalic acid, adipic acid and fumaric acid.
Claim 6
Dependent Claim
20 words
A polymer as in claim 1 wherein said other group which is reactive with said polyester is carboxyl or hydroxyl.
Claim 7
Dependent Claim
33 words
A polymer as in claim 1 wherein said mercaptan is comprised of a hydrocarbon chain having pendant hydroxyl or carboxyl groups and wherein said hydrocarbon chain contains up to about 18 carbon atoms.
Claim 8
Dependent Claim
25 words
A polymer as in claim 1 wherein said mercaptan is a member of the class consisting of mercaptoacetic acid, 2,2-dimercaptoisobutyric acid, cysteine and O-mercaptobenzoic acid.
Claim 9
Dependent Claim
29 words
A polymer as in claim 1 wherein said ethylenically unsaturated monomer contains a single CH 2 =C< in a terminal position, which group is activated by a negative substituent.
Claim 10
Dependent Claim
32 words
A polymer as in claim 1 wherein the ethylenically unsaturated monomer is a member of the class consisting of acrylates, methacrylates, vinyl aromatic hydrocarbons, unsaturated acids and unsaturated esters of organic acids.
Claim 11
Dependent Claim
33 words
A polymer as in claim 1 wherein said ethylenically unsaturated monomer is a member of the class consisting of ethyl acrylate, methyl methacrylate, butyl acrylate, ethylhexyl acrylate, styrene, vinyl toluene and monomethyl styrene.
Claim 12
Dependent Claim
35 words
A polymer as in claim 1 wherein said mercapto-terminated reaction product is reacted with a plurality of said ethylenically unsaturated monomers and wherein one of said ethylenically unsaturated monomers is an unsaturated carboxylic acid amide.
Claim 13
Dependent Claim
21 words
A polymer as in claim 11 wherein the aide is selected from the group consisting of acrylamide, diacetone acrylamide and n-butoxymethylacrylamide.
Claim 14
Dependent Claim
18 words
An article of manufacture comprising a substrate having a coating of the polymer of claim 1 applied thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |