# US 3,932,255 A · Method of making an improved tire building sleeve and said sleeve

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 3,932,255 A
- Document ID: US3932255A
- Status: Granted
- Kind: A
- Application number: 05/490,147
- Filed: 1974-07-20
- Granted: 1976-01-13
- Earliest claimed: 1973-06-22
- Assignees: The Goodyear Tire & Rubber Company
- Inventors: Jeffrey W. Saracsan
- Web page: https://patentgrep.com/patent/US3932255A

## CPC

- B32B 25/10: next to a fibrous or filamentary layer
- B29D 22/02: Inflatable articles
- 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)}
- B29D 30/26: Accessories or details, e.g. membranes, transfer rings
- B32B 25/08: of synthetic resin
- C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G 18/4238: {derived from dicarboxylic acids and dialcohols}
- C09D 175/06: from polyesters
- C09D 175/08: from polyethers
- B29D 2030/0655: {Constructional or chemical features of the flexible cores}
- B29D 2030/2614: {Bladders associated with the building drum, e.g. bladders used for the toroidal expansion, bladders for turning-up the plies}
- B29L 2022/025: {Bladders}
- C08G 2380/00: Tyres
- Y10T 152/1081: Breaker or belt characterized by the chemical composition or physical properties of elastomer or the like
- Y10T 152/10846: Bead characterized by the chemical composition and or physical properties of elastomers or the like
- Y10T 428/31583: Nitrile monomer type [polyacrylonitrile, etc.]
- Y10T 428/31587: Hydrocarbon polymer [polyethylene, polybutadiene, etc.]
- Y10T 428/31598: Next to silicon-containing [silicone, cement, etc.] layer
- Y10T 428/31667: Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## 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

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 1)

The sleeve of claim 1 wherein the silicone polycarbinol has the structure of Formula A: ##EQU3## or Formula B: ##EQU4##