Silane Compositions and Methods for Bonding Rubber to Metals
First Claim
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1. A method of bonding rubber to a metal substrate, the method comprising:
- applying a silane solution comprising a substantially hydrolyzed bis amino-silane, a substantially hydrolyzed bis sulfur-containing silane, and a nanosize particulate material to at least a portion of a surface of the metal substrate;
drying the silane solution on the metal substrate to form a coating having a thickness in the range from about 0.1 μ
m to about 1 μ
m thereon; and
applying an uncured, sulfur curable rubber onto the surface of the metal substrate having the coating thereon and sulfur curing the rubber to bond the rubber to the coated metal substrate.
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Abstract
Compositions and methods for treating metal substrates and/or bonding metal substrates to polymeric materials, such as rubber, are provided. The compositions include at least one substantially hydrolyzed amino silane and at least one substantially hydrolyzed sulfur-containing silane. Optionally, the compositions include a nano-size particulate material. The compositions provide coatings on metal substrates for protecting the metal from corrosion and for adhering rubber-like polymeric compositions to the metal with polymer-to-metal vulcanization conditions less dependent on the coating thickness, and with use of less coating materials.
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Citations
26 Claims
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1. A method of bonding rubber to a metal substrate, the method comprising:
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applying a silane solution comprising a substantially hydrolyzed bis amino-silane, a substantially hydrolyzed bis sulfur-containing silane, and a nanosize particulate material to at least a portion of a surface of the metal substrate; drying the silane solution on the metal substrate to form a coating having a thickness in the range from about 0.1 μ
m to about 1 μ
m thereon; andapplying an uncured, sulfur curable rubber onto the surface of the metal substrate having the coating thereon and sulfur curing the rubber to bond the rubber to the coated metal substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of bonding rubber to a metal substrate, the method comprising:
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mixing bis amino-silane and a bis sulfur-containing silane separately with an aqueous-based medium to substantially hydrolyze the bis amino-silane and the bis sulfur-containing silane; mixing the hydrolyzed bis amino-silane, the hydrolyzed bis sulfur-containing silane, and a nanosize particulate material having an average particle size of about 0.1 μ
m or less, together to form a silane solution comprising a ratio of the hydrolyzed bis amino-silane to the hydrolyzed bis sulfur-containing silane in a range from about 1;
4 to about 4;
1 by volume,applying the solution to at least a portion of a surface of the metal substrate in an amount sufficient to form a coating to a thickness in the range from about 0.1 μ
m to about 1 μ
m; anddrying the solution on the metal substrate to form the coating thereon; applying an uncured, sulfur curable rubber onto the surface of the metal substrate having the solution applied thereon; and sulfur curing the rubber with heat and pressure to bond the rubber to the metal substrate.
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21. A tire cord comprising sulfur curable rubber, a metal substrate, and an adhesive film therebetween bonding the rubber to the metal substrate, the adhesive film formed from a dried solution comprising a substantially hydrolyzed bis amino-silane, a substantially hydrolyzed bis sulfur-containing silane, and a nanosize particulate material and having a thickness in the range from about 0.1 μ
- m to about 1 μ
m. - View Dependent Claims (22, 23, 24, 25, 26)
- m to about 1 μ
Specification