Patent US3637359A successfully refreshed from Google Patents.
US3637359A
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Coated abrasive belt overlap joint
Assignee: Saint Gobain Abrasives Inc
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Filing: 1970-01-06
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Granted: 1972-01-25
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Expires: 1990-01-06
Abstract
Abstract An adhesive composition is provided for the manufacture of coated abrasive belts which has the advantageous characteristics of a relatively long permissible dwell time, shelf and/or pot life, and which provides on curing, after application as a coating, good adhesion. The cured product of the adhesive composition comprises in admixture the reaction product of a hydroxyl terminated polyurethane-polyester and a component having available free isocyanate groups, and a suitable tackifying agent.
Inventors
- 👤 John F Malloy
- 👤 Charles J Seiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:08
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T428/00; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
Coated abrasive material according to claim 1 wherein said joint has an adhesion peel strength exceeding 13 lbs./inch of width.
Claim 2
Dependent Claim
27 words
Coated abrasive material according to claim 1 wherein said tackifying agent in the adhesive composition is a chlorinated hydrocarbon having a minimum of 40 percent combined chlorine.
Claim 3
Dependent Claim
69 words
Coated abrasive material in accordance with claim 3 in which, based upon the weight of total solids in the adhesive composition, the tackifying agent is from about 1 to about 32 percent, the hydroxyl terminated polyurethane-polyester is from about 75 to about 51 percent, and the isocyanate component is present in sufficient amount to make available free isocyanate group in an amount from about 0.6 to about 4 percent.
Claim 4
Dependent Claim
52 words
Coated abrasive material according to claim 4 including in said adhesive composition a catalyst suitable for catalyzing the reaction between the free isocyanate groups and the hydroxyl groups thus providing for more rapid cure of the adhesive composition, said catalyst being present in an amount from about 0.07 to about 0.5 percent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |