Patent US4004050A successfully refreshed from Google Patents.
US4004050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-part primer system for FRP bonding
Assignee: Ashland Inc
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Filing: 1974-08-26
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Granted: 1977-01-18
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Expires: 1994-08-26
Abstract
Abstract An improved adhesion between polyester compositions per se or metals using the isocyanate-type adhesive is obtained by first treating the surface of the polyester composition and/or metal with a first and a second treating agent without regard to sequence where the first treating agent is an organic polyisocyanate and the second treating agent is a tertiary amine.
Inventors
- 👤 Thomas G. Rabito
- 👤 Alvin J. Kieft
- 👤 Richard L. Cline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:48
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; B; B32; B32B; B32B27/00; B32B27/04; C08J5/00; C08J5/12; C08J5/124; C08J7/043; C09; C09J; C09J175/00; C08J2367/00; C08J2367/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31786
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
A method for improving the adhesion between an adhesive of the isocyanate class and a polyester composition comprising treating the surface of the polyester composition with a first and second treating agent without regard to sequence and then applying an adhesive of the isocyanate class and curing said adhesive, said first treating agent being an organic polyisocyanate and the second treating agent being a tertiary amine.
Claim 2
Independent Claim
66 words
A method for improving the adhesion between an adhesive of the isocyanate class and a polyester composition comprising treating the surface of the polyester composition with a first and second treating agent without regard to sequence and then applying an adhesive of the isocyanate class and curing said adhesive, said first treating agent being an organic polyisocyanate and the second treating agent being a tertiary amine.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the organic polyisocyanate is a phosgenation product of the rearranged product of the reaction of aniline and formaldehyde.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the tertiary amine is triethylene diamine.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein the adhesive is of the isocyanate class, obtained by reacting organic polyisocyanate with polypropylene ether glycol.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |