Patent US4016332A successfully refreshed from Google Patents.
US4016332A
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Mercaptan blocked thermosetting copolymers
Assignee: PPG Industries Inc
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Filing: 1972-05-01
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Granted: 1977-04-05
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Expires: 1992-05-01
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 17:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6882; C08F; C08F293/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
70 words
A polymer prepared by the process comprising: a reacting 1. a polyol, and 2. a mercaptan comprising a hydrocarbon chain of from 1 to about 18 carbon atoms which has been substituted with at least one carboxyl group 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
70 words
A polymer prepared by the process comprising: a reacting 1. a polyol, and 2. a mercaptan comprising a hydrocarbon chain of from 1 to about 18 carbon atoms which has been substituted with at least one carboxyl group 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
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 4
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 5
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 6
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 7
Dependent Claim
21 words
A polymer as in claim 5 wherein the amide is selected from the group consisting of acrylamide, diacetone acrylamide and n-butoxymethylacrylamide.
Claim 8
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 9
Dependent Claim
23 words
A polymer as in claim 1 wherein the polyol is a member of the group consisting of polycaprolactone polyol, 2,2-dimethyl-3-hydroxypropyl 2,2-dimethyl-3-hydroxypropionate, and 2-methyl-2-ethyl-1,3-propanediol.
Claim 10
Dependent Claim
12 words
The polymer as in claim 1 wherein the polyol is polycaprolactone polyol.
Claim 11
Dependent Claim
12 words
The polymer as in claim 1 wherein the polyol is polycaprolactone diol.
Claim 12
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |