Power transmission belt

• US 7,781,528 B2
• Filed: 10/28/2004
• Issued: 08/24/2010
• Est. Priority Date: 10/31/2003
• Status: Active Grant

• Current Assignee: Mitsuboshi Belting Limited
• Original Assignee: Mitsuboshi Belting Limited
• Inventors: Takada, Toshimichi, Takehara, Tsuyoshi, Shigemitsu, Nozomu, Takaba, Susumu
• Primary Examiner(s): Cano; Milton I
• Assistant Examiner(s): Mesh; Gennadiy
• Application Number:
  US10/975,137
• Publication Number:
  US 20050096433A1
• Time in Patent Office: 2,126 Days
• Field of Search: 525/194, 474/252, 474/265
• US Class Current: 525/194
• CPC Class Codes: C08L 23/0853 Vinylacetate
• CPC Class Codes: C08L 23/0869 Acids or derivatives thereof
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C08L 2312/00 Crosslinking
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: F16G 1/28 with a contact surface of special shape, e.g. toothed
• CPC Class Codes: F16G 5/06 with reinforcement bonded by the rubber
• CPC Class Codes: F16G 5/20 with a contact surface of special shape, e.g. toothed

Abstract

A power transmission belt having a body with a length, an inside, an outside, and laterally spaced side surfaces. The body has a first rubber composition that includes an organic peroxide used as a cross-linking agent and N,N′-m-phenylenedimaleimide and/or quinone dioxime in an amount of 0.5 to 13 parts by weight per 100 parts by weight of rubber components. The rubber components include (a) ethylene-vinyl ester copolymer and/or an ethylene-α,β-unsaturated carboxylate copolymer, and (b) an ethylene α-olefin rubber in a ratio of from 5:95 to 100:0 by weight.

Claims

1. A power transmission belt comprising:

a body having a length, an inside, an outside, and laterally spaced side surfaces, the body comprising a first rubber composition with rubber components and at least one load carrying member at least partially embedded in the first rubber composition,

the first rubber composition comprising an organic peroxide used as a cross-linking agent and quinone dioxime in an amount of 0.5 to 13 parts by weight per 100 parts by weight of rubber components,

the rubber components comprising (a) ethylene-vinyl acetate copolymer and (b) an ethylene α

-olefin rubber in a ratio of from 10;

90 to 60;

40 by weight,

wherein the amount of vinyl acetate in the ethylene-vinyl acetate copolymer is 30 to 70% by weight, and wherein tensile strength of said belt is at least from about 1000 to about 1090 N/6 mm.

2. The power transmission belt according to claim 1 wherein the quinone dioxime comprises benzoquinone dioxime.

3. The power transmission belt according to claim 1 wherein the body comprises a plurality of teeth spaced along the length of the body.

4. The power transmission belt according to claim 3 wherein the first rubber composition defines at least a part of the plurality of teeth.

5. The power transmission belt according to claim 4 wherein the teeth are spaced at regular intervals along the length of the body.

6. The power transmission belt according to claim 4 wherein the quinone dioxime comprises benzoquinone dioxime.

7. The power transmission belt according to claim 1, wherein the first rubber composition further comprises zinc oxide, carbon black, and a plasticizer.

8. The power transmission belt according to claim 7, wherein the organic peroxide is at about 2 parts by weight of the rubber components;

zinc oxide is at about 5 parts by weight of the rubber components;

carbon black is at about 50 parts by weight of the rubber components;

the plasticizer is at about 10 parts by weight of the rubber components; and

quinone dioxime is between about 1 and about 5 parts by weight of the rubber components.

9. The power transmission belt according to claim 8, further comprising stearic acid.