US3607360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving adhesion of low friction coating to elastomers
Assignee: OTTO C ELMER
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Filing: 1969-04-03
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Granted: 1971-09-21
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Expires: 1989-04-03
Abstract
Abstract This invention concerns methods of improving the adhesion between low-friction coatings and elastomeric surfaces by the steps of precoating an EPDM elastomeric surface with a chlorinated ethylene-propylene copolymer containing from about 15 percent to about 25 percent chlorine and, applying a polyurethane low-friction coating to said precoated elastomeric surface. The copolymer may also be used as an additive to the low-friction coating mixture instead of as a precoat.
Inventors
- 👤 Otto C Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:50
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/24; B05D7/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
The method of claim 1 wherein the step of precoating said surface of said terpolymer comprises the steps of: a. mixing said chlorinated ethylene-propylene copolymer with a nonreactive solvent to form a solution; b. applying a coating of said solution to said surface of said terpolymer; and, c. evaporating said solvent from said coating.
Claim 2
Dependent Claim
21 words
The method of claim 1 wherein said low-friction coating comprises a moisture-curable polyurethane comprising a polyolisocyanate adduct containing free isocyanato groups.
Claim 3
Independent Claim
96 words
A method of improving the adhesion between a low-friction coating comprising a cured polyurethane and the surface of a terpolymer of ethylene, propylene, and a nonconjugated diolefin comprising the steps of: a. forming a first solution of a curable low-friction polyurethane coating material; b. adding to said first solution a second solution of a chlorinated ethylene-propylene copolymer containing from about 15 percent to about 25 percent chlorine by eight in a suitable solvent; c. coating said surface of said terpolymer with the combined solutions; and, d. drying and curing said polyurethane to form a low-friction coating.
Claim 4
Dependent Claim
22 words
The method of claim 4 wherein said low-friction coating material comprises a moisture-curable polyurethane comprising a polyoldiisocyanate adduct containing free isocyanato groups.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |