Method of making an improved tire building sleeve and said sleeve

• US 3,932,255 A
• Filed: 07/20/1974
• Issued: 01/13/1976
• Est. Priority Date: 06/22/1973
• Status: Expired due to Term

• Current Assignee: Goodyear Tire & Rubber Company
• Original Assignee: Goodyear Tire & Rubber Company
• Inventors: Saracsan, Jeffrey W.
• Primary Examiner(s): Drummond, Douglas J.
• Assistant Examiner(s): Kittle, John E.
• Application Number:
  US05/490,147
• Time in Patent Office: 542 Days
• Field of Search: 156/401, 156/416, 156/132, 156/133, 156/289, 427/421, 428/423, 428/425, 428/446, 428/451, 252/9, 260/448.2, 260/46.5 G
• US Class Current: 156/401
• CPC Class Codes: B29D 2030/0655 Constructional or chemical features of the flexible cores
• CPC Class Codes: B29D 2030/2614 Bladders associated with the building drum, e.g. bladders used for the toroidal expansion, bladders for turning-up the plies
• CPC Class Codes: B29D 22/02 Inflatable articles
• CPC Class Codes: B29D 30/0654 Flexible cores therefor, e.g. bladders, bags, membranes, diaphragms elastic cores or mandrels for shaping of plastics B29C33/505; bags for isostatic pressing in compression moulding B29C43/12, B29C43/3642
• CPC Class Codes: B29D 30/26 Accessories or details, e.g. membranes, transfer rings
• CPC Class Codes: B29L 2022/025 Bladders
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 25/10 next to a fibrous or filamentary layer
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/3814 Polyamines
• CPC Class Codes: C08G 18/4238 derived from dicarboxylic acids and dialcohols
• CPC Class Codes: C08G 2380/00 Tyres
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 175/06 from polyesters
• CPC Class Codes: C09D 175/08 from polyethers
• CPC Class Codes: Y10T 152/1081 Breaker or belt characterized by the chemical composition or physical properties of elastomer or the like
• CPC Class Codes: Y10T 152/10846 Bead characterized by the chemical composition and or physical properties of elastomers or the like
• CPC Class Codes: Y10T 428/31583 Nitrile monomer type [polyacrylonitrile, etc.]
• CPC Class Codes: Y10T 428/31587 Hydrocarbon polymer [polyethylene, polybutadiene, etc.]
• CPC Class Codes: Y10T 428/31598 Next to silicon-containing [silicone, cement, etc.] layer
• CPC Class Codes: Y10T 428/31667 : Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product

Abstract

This invention relates to a method of making sleeves or bladders for tire building machines for building bias angle tires, bias belted tires or radial ply belted tires by building the core of the sleeve of natural rubber, high cis polybutadiene, high cis polyisoprene, acrylonitrile-butadiene and butadiene styrene, and covering the outside of the core and at least part of the inside thereof with a layer of polyurethane elastomer, where the expose coat contains 0.5 to 10 percent by weight of silicone polycarbinol as slip agent.

Claims

1. A sleeve for a tire building machine, including an inflatable body portion having dimensions suitable for attachment in operative relationship with a tire building machine, said body portion comprising an inner layer or core of a cured compounded elastomer selected from the class of rubber polymers consisting of natural, high cis-polybutadiene, high cis-polyisoprene, acrylonitrile-butadiene and butadiene stryene and at least one coat of a polyurethane elastomer which extends around the ends of the inner layer past at least the area that contacts the drum, said polyurethane elastomer containing 0.5 to 10 percent by weight of a silicone polycarbinol or silicone polycarbinal.

2. The sleeve of claim 1 wherein the core contains an expansible fabric.

3. The sleeve of claim 1 wherein the polyurethane elastomer has a Shore A hardness of about 45 to 65.

4. The sleeve of claim 1 wherein the first coat applied over the core is a polyesterurethane and the next coat is a polyetherurethane containing 4 to 10 percent by weight of a silicone polyol slip agent.

5. The sleeve of claim 1 wherein the silicone polycarbinol has the structure of Formula A:

##EQU3## or Formula B;

##EQU4##