US4083835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating processes, compositions and substrates coated with maleic anhydride copolymers having the anhydride moieties reacted with hydrozine or its derivatives
Assignee: BASF SE
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Filing: 1976-06-25
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Granted: 1978-04-11
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Expires: 1996-06-25
Abstract
Abstract Copolymers which have a molecular weight of from 600 to 24,500, and which contain from 0.1 to 60 per cent by weight of succinic acid hydrazide units and from 99.9 to 40% by weight of one or more ethylenically unsaturated monomers which are copolymerizable with maleic anhydride, are used as coating agents and binders.
Inventors
- 👤 Heinz Pohlemann
- 👤 Hermann Gausepohl
- 👤 Herbert Naarmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:55
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455; C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; D21H17/42; D21H17/43; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/3188; Y10T428/31935
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
173 words
Copolymers which have a molecular weight, as determined by vapor pressure osmometry in chloroform at a concentration of 0.1% by weight and at 37° C., of from 600 to 24,500 and which contain from 0.1 to 60% by weight of units of the formula ##STR15## where R 1 is H and R 2 is --CH 3 , --C 2 H 5 , --C 3 H 7 , ##STR16## and R 3 and R 4 are --H, --CH 3 , --C 2 H 5 or --C 3 H 7 , and from 99.9 to 40 percent by weight of units of one or more ethylenically unsaturated monomers which are copolymerizable with maleic anhydride and are selected from amongst o(-olefins of 2 to 12 carbon atoms, monovinyl-aromatic compounds, alkyl esters of ethylenically unsaturated carboxylic acids of 3 to 5 carbon atoms, alkyl esters and alkyl half-esters of maleic acid or fumaric acid, ethylenically unsaturated carboxylic acids of 3 to 5 carbon atoms and their amides, o(-methyleneglutaric acid, vinylphosphonic acid, acrylamidopropanesulfonic acid and alkyl vinyl ethers.
Claim 2
Dependent Claim
173 words
Copolymers which have a molecular weight, as determined by vapor pressure osmometry in chloroform at a concentration of 0.1% by weight and at 37° C., of from 600 to 24,500 and which contain from 0.1 to 60% by weight of units of the formula ##STR15## where R 1 is H and R 2 is --CH 3 , --C 2 H 5 , --C 3 H 7 , ##STR16## and R 3 and R 4 are --H, --CH 3 , --C 2 H 5 or --C 3 H 7 , and from 99.9 to 40 percent by weight of units of one or more ethylenically unsaturated monomers which are copolymerizable with maleic anhydride and are selected from amongst o(-olefins of 2 to 12 carbon atoms, monovinyl-aromatic compounds, alkyl esters of ethylenically unsaturated carboxylic acids of 3 to 5 carbon atoms, alkyl esters and alkyl half-esters of maleic acid or fumaric acid, ethylenically unsaturated carboxylic acids of 3 to 5 carbon atoms and their amides, o(-methyleneglutaric acid, vinylphosphonic acid, acrylamidopropanesulfonic acid and alkyl vinyl ethers.
Claim 3
Dependent Claim
70 words
A copolymer as claimed in claim 1 wherein the first-mentioned units of said copolymer are derived by reacting a copolymer of maleic anhydride with a compound of the formula ##STR17## where -R 2 is --CH 3 , --C 2 H 5 , --C 3 H 7 , ##STR18## and R 3 and R 4 are independently H, CH 3 , C 2 H 5 or C 3 H 7 .
Claim 4
Dependent Claim
95 words
A copolymer as claimed in claim 1 wherein the first-mentioned units of said copolymer are derived by reacting a copolymer of maleic anhydride with a compound of the formula ##STR19## where -R 2 is --CH 3 , --C 2 H 5 , --C 3 H 7 , ##STR20## and R 3 and R 4 are independently H, CH 3 , C 2 H 5 or C 3 H 7 , and wherein said copolymer of maleic anhydride and said one or more ethylenically unsaturated monomers is derived by continuous polymerization at 130° to 320° C.
Claim 5
Dependent Claim
106 words
A copolymer as claimed in claim 1 wherein the first-mentioned units of said copolymer are derived by reacting a copolymer of maleic anhydride with a compound of the formula ##STR21## where -R 2 is --CH 3 , --C 2 H 5 , --C 3 H 7 , ##STR22## and R 3 and R 4 are independently H, CH 3 , C 2 H 5 or C 3 H 7 , and wherein said copolymer of maleic anhydride and said one or more ethylenically unsaturated monomers is derived by continuous polymerization at 130° to 320° C in the absence of a polymerization initiator and a polymerization regulator.
Claim 6
Dependent Claim
12 words
A copolymer as claimed in claim 1 wherein R 2 is methyl.
Claim 7
Dependent Claim
18 words
A copolymer as claimed in claim 1 wherein R 2 is methyl, ethyl, phenyl, p-tolyl, o-nitrophenyl or o,p-dinitrophenyl.
Claim 8
Dependent Claim
21 words
A copolymer as claimed in claim 1 wherein R 2 is --CONH 2 , CONHphenyl, or --CON(CH 3 ) 2 .
Claim 9
Dependent Claim
14 words
A copolymer as claimed in claim 1 wherein R 2 is --SO 2 -phenyl.
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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |