Patent US3945875A successfully refreshed from Google Patents.
US3945875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for obtaining polyester laminates and said laminates
Assignee: Ashland LLC
•
Filing: 1972-02-02
•
Granted: 1976-03-23
•
Expires: 1992-02-02
Abstract
Abstract This invention relates to a method for obtaining improved adhesion in the preparation of polyester laminates by treating the surface with an isocyanate containing ethylenic unsaturation and then applying a polyester adhesive containing a peroxide curing agent and to the said laminates.
Inventors
- 👤 William E. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:13
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0442; C08F299/045; B32B27/36; B32B7/00; B32B7/04; B32B7/12; C08J; C08J5/00; C08J5/12; C08J5/124; C08J5/125; B32B2262/00; B32B2262/10; B32B2262/101; C08J2367/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31786
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A method of forming a laminate of two specimens comprising treating the surface of a polyester specimen with an organic isocyanate containing ethylenic unsaturation, then applying a fluid adhesive comprising an organic peroxide curative and an unsaturated polyester to at least one of the specimens to be laminated, placing the treated polyester specimen in laminating relationship with the other specimen and curing the adhesive to bond the specimens together, said polyester specimen being the reaction product of a polycarboxylic acid or anhydride with a polyol.
Claim 2
Independent Claim
85 words
A method of forming a laminate of two specimens comprising treating the surface of a polyester specimen with an organic isocyanate containing ethylenic unsaturation, then applying a fluid adhesive comprising an organic peroxide curative and an unsaturated polyester to at least one of the specimens to be laminated, placing the treated polyester specimen in laminating relationship with the other specimen and curing the adhesive to bond the specimens together, said polyester specimen being the reaction product of a polycarboxylic acid or anhydride with a polyol.
Claim 3
Dependent Claim
45 words
The method of claim 1 wherein the peroxide has the formula ##EQU1## where R 1 , R' 1 , R 2 , R' 2 , R 3 and R' 3 are alkyl, aryl, or haloaryl and at least one R group can be peroxy alkyl.
Claim 4
Dependent Claim
46 words
The method of claim 1 wherein the compound used for treating the surface of the polyester specimen is the reaction product of an organic polyisocyanate with a reactive hydrogen material selected from the class of unsaturated carboxylic acid, unsaturated organic amines, unsaturated alcohol and unsaturated polyols.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the treating compound is a reaction product of an organic polyisocyanate and diallyl amine.
Claim 6
Dependent Claim
15 words
The method of claim 3 wherein the reactive hydrogen material is an unsaturated polyester polyol.
Claim 7
Dependent Claim
20 words
The method of claim 3 wherein the reactive hydrogen material is said polyol and further is a hydroxyl terminated polybutadiene.
References Cited (Backward Citations)
US2606892A
Cited
US2905582A
Cited
US3505252A
Cited
US3396063A
Cited
US3463698A
Cited
US3526572A
Cited
US3546041A
Cited
US3642553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |