Patent US4462855A successfully refreshed from Google Patents.
US4462855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for bonding polyester reinforcement elements to rubber
Assignee: CLEANESE Corp
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Filing: 1982-06-28
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Granted: 1984-07-31
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Expires: 2002-06-28
Abstract
Abstract Polyester reinforcement fibers are treated to improve adhesion to rubber by applying a dissolved aromatic urethane coating to the fibers followed by coating the fibers with a resorcinol-formaldehyde latex and then heating the fibers sufficiently to convert the aromatic urethane to an aromatic isocyanate and applying to and curing a layer of rubber on said treated polyester fibers.
Inventors
- 👤 Anthony W. Yankowsky
- 👤 Harry W. Stanhope
- 👤 Darrell D. Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:23
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
191 words
The process of bonding polyester reinforcement fibers to rubber consisting essentially of: providing polyester reinforcement fibers bearing a coating consisting essentially of an organic solution of a dissolved aromatic urethane having the formula Ar(NHCOX) n wherein Ar is an organic residue containing at least one aromatic nucleus, X is a moiety selected from the group consisting of alkoxy, aryloxy and alkaryloxy and n is greater than about 2; said aromatic urethane exhibiting thermal disassociation at a temperature in the range of between 220° F. and about 465° F., thereby forming an aromatic isocyanate; said dissolved aromatic urethane solution additionally comprising a flexibilizing agent in an amount of between 5 and about 50 percent by weight based on the weight of said aromatic urethane and being substantially free of free isocyanate; coating said polyester reinforcement fibers bearing said dissolved urethane coating with a latex comprising resorcinol-formaldehyde resin, heating said latex coated fibers to a temperature in the range of between about 220° F. and about 480° F. and above the thermal disassociation temperature of said aromatic urethane, and applying to and curing a layer of rubber on said treated polyester reinforcement fibers.
Claim 2
Dependent Claim
191 words
The process of bonding polyester reinforcement fibers to rubber consisting essentially of: providing polyester reinforcement fibers bearing a coating consisting essentially of an organic solution of a dissolved aromatic urethane having the formula Ar(NHCOX) n wherein Ar is an organic residue containing at least one aromatic nucleus, X is a moiety selected from the group consisting of alkoxy, aryloxy and alkaryloxy and n is greater than about 2; said aromatic urethane exhibiting thermal disassociation at a temperature in the range of between 220° F. and about 465° F., thereby forming an aromatic isocyanate; said dissolved aromatic urethane solution additionally comprising a flexibilizing agent in an amount of between 5 and about 50 percent by weight based on the weight of said aromatic urethane and being substantially free of free isocyanate; coating said polyester reinforcement fibers bearing said dissolved urethane coating with a latex comprising resorcinol-formaldehyde resin, heating said latex coated fibers to a temperature in the range of between about 220° F. and about 480° F. and above the thermal disassociation temperature of said aromatic urethane, and applying to and curing a layer of rubber on said treated polyester reinforcement fibers.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein said dissolved aromatic urethane organic solution comprises a lubricant finish.
Claim 4
Dependent Claim
27 words
The process of claim 2 wherein said polyester reinforcement fibers are treated prior to application of said dissolved urethane coating, to activate the surface of said polyester.
Claim 5
Dependent Claim
21 words
The process of claim 3 wherein said surface activation treatment provides an increase in surface energy of said polyester reinforcement fibers.
Claim 6
Dependent Claim
24 words
The process of claim 3 wherein said polyester surface activation treatment comprises the application of a polyepoxide spin finish to said polyester reinforcement fibers.
Claim 7
Dependent Claim
9 words
The process of claim 2 wherein X is alkaryloxy.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein X comprises para- or ortho nonylphenoxy.
Claim 9
Dependent Claim
30 words
The process of claim 3 wherein said flexibilizing agent is present in an amount of about 10 to about 40% by weight, based on the weight of said aromatic urethane.
Claim 10
Dependent Claim
9 words
The process of claim 8 wherein X is alkylphenoxy.
Claim 11
Dependent Claim
22 words
The process of claim 9 wherein said polyester surface activation treatment comprises application of a polyepoxide coating to said polyester reinforcement fibers.
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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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |