US3923752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive adhesives from diesters of fumaric acid and vinyl compounds copolymerizable therewith
Assignee: Beiersdorf AG
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Filing: 1974-10-09
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Granted: 1975-12-02
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Expires: 1994-10-09
Abstract
Abstract A pressure sensitive adhesive material is made by coating a substrate with a copolymer of specified proportions of a diester of fumaric acid, and a vinyl compound copolymerisable therewith as well as either or both of an olefinically unsaturated copolymerisable polar compound with carboxyl, carboxamide, dicarboxylic anhydride or dicarboximide groups, and an olefinically unsaturated copolymerisable compound with selfcrosslinkable reactive groups, together with a cross-linking polyfunctional compound, and subjecting the coating thereon to a short period heat treatment.
Inventors
- 👤 Gunter Guse
- 👤 Hanns Georg Pietsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:26
CPC Classifications
C; C08; C08F; C08F222/00; C08F222/10; C08F222/12; C08F222/14; C08F222/145; B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6266; C09; C09J; C09J135/00; C09J135/02; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/38; C09J7/381; B32B2405/00; C08G2170/00; C08G2170/40; C08L; C08L2666/00; C08L2666/02; C08L2666/14; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2891
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PRESSURE-SENSITIVE ADHESIVE MATERIAL OF AN ADHESIVE COMPOSITION ADHERING ON CONTACT WHICH COMPRISES COPOLYMER FORMED FROM THE POLYMERIZATION OF A MONOMER MIXTURE OF (A) 50-80% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MONOMERS, OF AT LEAST ONE DIESTER OF FURMARIC ACID AND A SATURATED MONOVALENT ALIPHTIC ALCOHOL CONTAINING FROM 3 TO 12 CARBON ATOMS; (B) 18-40% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MONOMERS, OF AT LEAST ONE VINYL ESTER OF A SATURATED ALIPHATIC MONOCARBOXYLIC ACID COPOLYMERIZABLE WITH (A); (C) FROM 0.5 TO 15% BY WEIGTH, BASED ON THE TOTAL WEIGHT OF THE MONOMERS, OF MALEIC ACID ANHYDRIDE HAVING A POLARY GROUP COPOLYMERIZABLE WITH (A) AND (B), AND (D) FROM 0.1 TO 10% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MONOMERS, OF N-METHYLOLACRYLAMIDE COPOLYMERIZABLE WITH (A), (B) AND (C), SAID COMPOUND HAVING A SELF CORSS-LINKABLE N-METHYLOLAMIDE GROUPS, SAID GROUP OF (D) BEING AT LEAST CROSS-LINKED.
Claim 2
Dependent Claim
151 words
A PRESSURE-SENSITIVE ADHESIVE MATERIAL OF AN ADHESIVE COMPOSITION ADHERING ON CONTACT WHICH COMPRISES COPOLYMER FORMED FROM THE POLYMERIZATION OF A MONOMER MIXTURE OF (A) 50-80% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MONOMERS, OF AT LEAST ONE DIESTER OF FURMARIC ACID AND A SATURATED MONOVALENT ALIPHTIC ALCOHOL CONTAINING FROM 3 TO 12 CARBON ATOMS; (B) 18-40% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MONOMERS, OF AT LEAST ONE VINYL ESTER OF A SATURATED ALIPHATIC MONOCARBOXYLIC ACID COPOLYMERIZABLE WITH (A); (C) FROM 0.5 TO 15% BY WEIGTH, BASED ON THE TOTAL WEIGHT OF THE MONOMERS, OF MALEIC ACID ANHYDRIDE HAVING A POLARY GROUP COPOLYMERIZABLE WITH (A) AND (B), AND (D) FROM 0.1 TO 10% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MONOMERS, OF N-METHYLOLACRYLAMIDE COPOLYMERIZABLE WITH (A), (B) AND (C), SAID COMPOUND HAVING A SELF CORSS-LINKABLE N-METHYLOLAMIDE GROUPS, SAID GROUP OF (D) BEING AT LEAST CROSS-LINKED.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |