Method for protecting a tire against ozone
First Claim
1. A tire having a rubber outer surface based on essentially unsaturated dienic elastomers, wherein at least a part of the rubber outer surface is covered with a coating for protection against ozone, wherein said coating comprises at least one layer in contact with the air, wherein the layer comprises surfactants and polyurethane prepared from a polyol selected from the group consisting of aliphatic polyethers, aliphatic polyesters, and polyethers and polyesters whose main chain is semi-aromatic, and wherein bonds between the elastomer and the polyurethane are formed as a result of polar functions on the elastomer.
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Abstract
The present invention relates to a method for anti-ozone protection of at least a part of the outer surface of a vulcanized tire, where the composition of the tire is based on essentially unsaturated dienic elastomers. The present method comprises: (1) subjecting the surface of the vulcanized tire to a treatment in order to polarize and functionalize the elastomers of the surface; (2) applying at least one layer comprising an aqueous polyurethane dispersion to this treated surface; and (3) allowing this layer to dry until a protective coating is formed. The present invention further relates to a tire comprising an anti-ozone protective coating, where the protective coating is formed according to the method described above.
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Citations
30 Claims
- 1. A tire having a rubber outer surface based on essentially unsaturated dienic elastomers, wherein at least a part of the rubber outer surface is covered with a coating for protection against ozone, wherein said coating comprises at least one layer in contact with the air, wherein the layer comprises surfactants and polyurethane prepared from a polyol selected from the group consisting of aliphatic polyethers, aliphatic polyesters, and polyethers and polyesters whose main chain is semi-aromatic, and wherein bonds between the elastomer and the polyurethane are formed as a result of polar functions on the elastomer.
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13. A method for protecting at least part of a rubber outer surface of a vulcanized tire from ozone, wherein the rubber outer surface is based on essentially unsaturated dienic elastomers, said method comprising:
- (1) subjecting the surface of the vulcanized tire to a treatment in order to polarize and functionalize the elastomers of the surface;
(2) applying at least one layer comprising an aqueous polyurethane dispersion to the treated surface; and
(3) allowing the layer to dry until a protective coating is formed. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
- (1) subjecting the surface of the vulcanized tire to a treatment in order to polarize and functionalize the elastomers of the surface;
Specification