Patent EP0451425A2 successfully refreshed from Google Patents.
EP0451425A2
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EP
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Process for the surface treatment of polymers for reinforcement-to-rubber adhesion
Assignee: Goodyear Tire and Rubber Co
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Filing: 1990-12-18
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Granted: —
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Expires: 2010-12-18
Abstract
Abstract This invention is directed to treating the surfaces of rubber-reinforcing materials with a gas plasma of O₂ and CF₄ to activate the surfaces to make them more receptive to adhesives. Optionally the surfaces of the reinforcing materials may be exposed to a polymerizing gas plasma such as a thio-carbon to coat the surfaces of the reinforcing material with substances that promote adhesion to rubber. The treated surfaces have been shown to adhere directly to rubber when vulcanized in the normal fashion.
Inventors
- 👤 Derek Shuttleworth
- 👤 Syed Khawja Mowdood
- 👤 Walter Harvey Waddell
- 👤 Jimmy Lee Richards
- 👤 Eilert Aloysius Ofstead
- 👤 Jerry Lawrence Brenner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:34
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J7/00; C08J7/12; C08J7/123; B; B29; B29B; B29B15/00; B29B15/08; B29C; B29C59/00; B29C59/14; B29C59/142; B60; B60C; B60C9/00; B60C9/0042; C08J5/04; C08J5/06; B29D; B29D30/00; B29D30/0005; B29D2030/0011; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
61 words
A method of preparing a polymer surface for chemical bonding comprising the steps of: (a) disposing a polymer having a surface in a plasma chamber containing a mixture of O₂ and CF₄ at a pressure of about 0.001 to 1 torr and (b) exposing said polymer surface to a plasma generated by electrical energy of about 50 Hz to 2.45 GHz.
Claim 2
Dependent Claim
25 words
The method according to claim 1 which comprises the step of charging said plasma chamber with a gaseous mixture comprising 10-90% O₂ and 10-90% CF₄.
Claim 3
Independent Claim
51 words
A method of preparing a surface of reinforcing polymer for direct bonding to rubber comprising the steps of: (a) disposing said reinforcing polymer in a plasma chamber containing a polymerizing gas; and (b) exposing said polymer surface to a plasma generated by electrical energy of about 50 Hz to 2.45 GHz.
Claim 4
Independent Claim
96 words
A method of preparing a surface of reinforcing polymer for direct bonding to rubber comprising the steps of: (a) disposing said reinforcing polymer in a first plasma chamber containing an incorporating gas, a non-incorporating gas, an inert gas, or a mixture thereof; (b) exposing said reinforcing polymer surface to a plasma generated by electrical energy of about 50 Hz to 2.45 GHz; (c) disposing said reinforcing polymer in a plasma chamber containing a polymerizing gas; and (d) exposing said reinforcing polymer surface to a plasma generated by electrical energy of about 50 Hz to 2.45 GHz.
Claim 5
Dependent Claim
24 words
The method of claim 8 which comprises the step of charging said plasma chamber with a gaseous mixture comprising 10-90% O₂ and 10-90% CF₄.
Claim 6
Dependent Claim
33 words
The method of claim 8 which comprises selecting said incorporating gas, non-incorporating gas or inert gas from the group consisting of NH₃, O₂, N₂, CF₄, SF₆, Ar, He, N₂O, H₂O and mixtures thereof.
Claim 7
Dependent Claim
13 words
The method of claim 8 which comprises selecting CS₂ as said polymerizing gas.
Claim 8
Dependent Claim
76 words
A pneumatic tire comprising a pair of reinforcing beads, a carcass ply wrapped around said pair of beads, reinforcing members, a tread area in a crown area of said tire, and sidewalls disposed between said tread and said pair of beads, characterized in that said reinforcing members comprise a reinforcing polymer which has been surface treated with a plasma in the presence of a polymerizing gas which deposits rubber bonding polymer on said reinforcing polymer surface.
Claim 9
Dependent Claim
140 words
A pneumatic tire comprising at least a pair of beads, at least one carcass ply wrapped around said pair of beads, optional additional reinforcing structure in a crown area of said tire, reinforcing members disposed in said carcass plies and said optional reinforcing structure and optionally in other areas of said tire, a tread in a crown area of said tire, sidewalls disposed between said tread and said pair of beads, characterized in that said reinforcing members comprise a reinforcing polymer which has been surface treated with a plasma in the presence of an incorporating, a non-incorporating or inert gas to remove hydrogen bonded species and weakly bonded species from the surface of said polymer to expose reactive sites in said polymer, and thereafter exposed to a polymerizing gas which deposits a rubber bonding polymer on said reinforcing polymer surface.
Claim 10
Dependent Claim
13 words
The pneumatic tire of claim 16 in which said polymerizing gas is CS₂.
Claim 11
Dependent Claim
30 words
The pneumatic tire of claim 16 in which said reinforcing member is surface treated with a plasma prior to exposure to said plasma in the presence of a polymerizing gas.
Claim 12
Dependent Claim
19 words
The pneumatic tire of claim 19 in which said reinforcing member is surface treated with a CS₂ polymerizing gas.
Claim 13
Dependent Claim
44 words
The pneumatic tire of claim 20 in which said reinforcing member is surface treated by a plasma in the presence of an incorporating gas, a non-incorporating gas, or an inert gas prior to exposure to said plasma in the presence of a polymerizing gas.
Claim 14
Dependent Claim
33 words
The pneumatic tire of claim 21 wherein said incorporating gas, non-incorporating gas or inert gas is selected from the group consisting of NH₃, O₂, N₂, CF₄, SF₆, Ar, He, F and mixtures thereof.
Claim 15
Dependent Claim
22 words
The pneumatic tire of claim 17 wherein said reinforcing member is in the form of a filament, tow, cord, or short fiber.
Claim 16
Dependent Claim
29 words
A reinforcing element for an elastomer or plastic comprising a thermoplastic material a surface of which comprises plasma deposits of species which are reactive with said elastomer or plastic.
Claim 17
Dependent Claim
22 words
The reinforcing element of claim 24 in which said thermoplastic material is selected from the group of polyester, polyamide and polyaromatic amide.
References Cited (Backward Citations)
No citation records indexed.
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