Urethane adhesive cord treatment for power transmission belt and belt

Patent metadata

Field	Value
Publication number	US-11548990-B2
Application number	US-201615290686-A
Country	US
Kind code	B2
Filing date	Oct 11, 2016
Priority date	Dec 1, 2009
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A belt with a tensile cord embedded in an elastomeric body, having an adhesive composition impregnating the cord and coating the fibers. The adhesive composition is the reaction product of a polyisocyanate and a polyol, or a polyurethane prepolymer derived therefrom, and a polyamine curative and optionally additional polyol, and with optionally added plasticizer. At least one of the polyisocyanate, the prepolymer, and the polyamine are blocked with a blocking agent. The belt body may be of cast polyurethane, vulcanized rubber, or thermoplastic elastomer. The cord may have an adhesive overcoat.

First claim

What is claimed is:

1. A belt comprising: an elastomeric body, and a carbon fiber tensile cord embedded in the elastomeric body;
with the tensile cord impregnated with an adhesive composition comprising the reaction product of:
a polyisocyanate and a first polyol or a polyurethane prepolymer comprising said polyisocyanate and said first polyol; and
at least one curative selected from the group consisting of diamines, triamines, and tetramines;
wherein at least one of said polyurethane prepolymer, said polyisocyanate and said curative has its reactive groups blocked by a blocking agent;
wherein said at least one of said polyurethane prepolymer, said polyisocyanate, and said curative is blocked curative complex 4,4′-methylenebisdianiline-NaCl.

Assignees

• Gates Corp

Inventors

• Wu William W L
• Wilson Cathy Peake
• Duke Jr Joseph R

Classifications

• D06M15/564

  Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them · CPC title

• D06M15/568

  Reaction products of isocyanates with polyethers · CPC title

• Y10T156/10

  Methods of surface bonding and/or assembly therefor · CPC title

• Y10T428/24479

  including variation in thickness · CPC title

• F16G1/28

  with a contact surface of special shape, e.g. toothed · CPC title