Coated rubber articles and method of producing same

• US 3,098,755 A
• Filed: 06/29/1959
• Issued: 07/23/1963
• Est. Priority Date: 06/29/1959
• Status: Expired due to Term

• Current Assignee: Harry J. Barth, Philip T. Gay
• Original Assignee: Harry J. Barth, Philip T. Gay
• Inventors: Barth, Harry J., Gay, Philip T.
• Application Number:
  US03/823,617
• Time in Patent Office: 1,485 Days
• US Class Current: 428/90
• CPC Class Codes: B05D 1/16 Flocking otherwise than by spraying
• CPC Class Codes: B05D 2503/00 Polyurethanes
• CPC Class Codes: B05D 7/02 to macromolecular substances, e.g. rubber treatment or coating of shaped articles made of macromolecular substances C08J7/00
• CPC Class Codes: B29C 41/14 Dipping a core B29C41/10 takes precedence
• CPC Class Codes: B29C 41/22 Making multilayered or multicoloured articles
• CPC Class Codes: B29K 2021/00 Use of unspecified rubbers as moulding material
• CPC Class Codes: B29K 2075/00 Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• CPC Class Codes: B29L 2031/48 Wearing apparel
• CPC Class Codes: C08J 2321/00 Characterised by the use of unspecified rubbers
• CPC Class Codes: C08J 2475/00 Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: C09J 175/04 Polyurethanes
• CPC Class Codes: Y10T 428/23943 Flock surface
• CPC Class Codes: Y10T 428/23979 Particular backing structure or composition
• CPC Class Codes: Y10T 428/23986 With coating, impregnation, or bond
• CPC Class Codes: Y10T 428/31569 Next to natural rubber
• CPC Class Codes: Y10T 428/31826 Of natural rubber

Claims

1. A METHOD OF PRODUCING ADHERENT ELASTOMERIC POLYURETHANE COATINGS ON DEPOSITED LATEX RUBBER SUBSTRATES WHICH COMPRISES WATER LEACHING THE UNCURED RUBBER SURFACE, DRYING SAID WATER LEACHED SURFACE TREATING SAID LEACHED SURFACE WITH A SOLUTION OF ISOCYANATE APPLYING TO SAID SURFACE A COATING OF AN ISOCYANATE-TERMINATED PREPOLYMER SELECTED FROM THE GROUP CONSISTING OF POLYESTERS AND POLYETHERS, SAID PREPOLYMERS BEING CURABLE TO AN ELASTOMERIC STATE, AND CURING THE PREPOLYMER WITH A NONAQUEOUS CROSS-LINKING AGENT AT A TEMPERATURE AND FOR A TIME SUFFICIENT ALSO TO CURE THE RUBBER SUBSTRATE, THE CURING AGENT BEING PRESENT IN AMOUNT TO PROVIDE A RATIO OF NCO GROUPS IN THE PREPOLYMER TO NCO-REACTIVE GROUPS IN THE CROSS-LINKING AGENT OF AT LEAST 1 AND LESS THAN 2.

3. A METHOD ACCORDING TO CLAIM 1 IN WHICH A FLOCK LAYER IS DEPOSITED ON THE SURFACE OF SAID PREPOLYMER COATING PRIOR TO CURING THE COATING.