Heat and humidity resistant steel cord reinforced rubber composite

• US 4,441,946 A
• Filed: 11/22/1982
• Issued: 04/10/1984
• Est. Priority Date: 05/04/1981
• Status: Expired due to Fees

• Current Assignee: The General Tire & Rubber Company
• Original Assignee: The General Tire & Rubber Company
• Inventors: Sharma, Satish C.
• Primary Examiner(s): Bell, James J.
• Application Number:
  US06/443,253
• Time in Patent Office: 505 Days
• Field of Search: 428/447, 428/450, 428/391, 152/359, 156/110 A, 156/335, 156/307.3, 156/307.7.331.5, 260/4 R, 260/42.32, 260/42.33, 260/735, 525/343, 525/535, 524/509
• US Class Current: 156/307.3
• CPC Class Codes: C08J 2321/00 Characterised by the use of unspecified rubbers
• CPC Class Codes: C08J 5/06 using pretreated fibrous materials
• CPC Class Codes: C08J 5/10 characterised by the additives used in the polymer mixture
• CPC Class Codes: D07B 2201/2012 comprising polymers
• CPC Class Codes: D07B 2205/20 Organic high polymers
• CPC Class Codes: D07B 2401/2095 Improving filler wetting respectively or filler adhesion
• CPC Class Codes: D07B 2501/2046 Tire cords
• CPC Class Codes: D07B 2801/18 Coating
• CPC Class Codes: Y10S 156/91 Bonding tire cord and elastomer: improved adhesive system
• CPC Class Codes: Y10T 152/10855 Characterized by the carcass, carcass material, or physical arrangement of the carcass materials
• CPC Class Codes: Y10T 428/2962 Silane, silicone or siloxane in coating
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

Humid aged adhesion of rubber containing a phenol formaldehyde resin bonded directly to bright steel cord is improved by coating the bright steel cord with an amino functional organo silane.

Claims

1. A method of bonding bright steel cord to an unvulcanized vulcanizable rubber which comprises coating said cord, said cord being free of acid or base surface treatment prior to coating, with an amino functional organo silane wherein said vulcanizable rubber contains a resorcinol and hexamethyol melamine bonding agent, a hydrated silica and other conventional rubber compounding ingredients, combining said coated bright steel cord and said unvulcanized vulcanizable rubber to form a composite and vulcanizing said composite.

2. The method of claim 1 wherein the amino functional organo silane is N-β

-(N-vinylbenzylamino) ethyl-γ

-aminopropyl-trimethoxysilane monohydrogen chloride.

3. The method of claim 1 wherein the bonding agent is a mixture of equal parts of resorcinol and hexamethyol melamine pentamethyl ether.