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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9815974 B1

PDFFull Text
Date of Patent:
Nov. 14, 2017

Filed:

Jan. 19, 2016

Recycled micronized rubber formulation having improved abrasion resistance

Applicant:

Lehigh Technologies, Inc., Tucker, GA (US);

Inventors:

Chad Aaron Jasiunas, Akron, OH (US);

Frank P. Papp, Fort Mill, SC (US);

Charles T. Rosenmayer, Decatur, GA (US);

Kedar D. Murthy, Boston, MA (US);

Assignee:

Lehigh Technologies, Inc., Tucker, GA (US);

Attorney:

Alvin T. Rockhill

Primary Examiner:

Terressa Boykin

Int. Cl.
CPC ...
C08G 63/00 (2006.01); C08L 9/06 (2006.01); B60C 1/00 (2006.01); B29B 17/02 (2006.01); B29B 17/04 (2006.01); C08J 11/04 (2006.01); C08J 11/06 (2006.01); C08L 21/00 (2006.01); B60C 9/02 (2006.01); B60C 13/00 (2006.01); B60C 15/00 (2006.01); B65G 15/32 (2006.01); C08L 7/00 (2006.01); C08G 63/02 (2006.01); B29K 9/06 (2006.01);
U.S. Cl.
CPC ...
C08L 9/06 (2013.01); B29B 17/02 (2013.01); B29B 17/0404 (2013.01); B60C 1/0016 (2013.01); B60C 9/02 (2013.01); B60C 13/00 (2013.01); B60C 15/00 (2013.01); B65G 15/32 (2013.01); C08J 11/04 (2013.01); C08J 11/06 (2013.01); C08L 7/00 (2013.01); C08L 21/00 (2013.01); B29K 2009/06 (2013.01); C08J 2321/00 (2013.01); C08J 2419/00 (2013.01); Y02P 20/143 (2015.11); Y02W 30/625 (2015.05); Y02W 30/70 (2015.05); Y02W 30/701 (2015.05);
Abstract

This invention is based upon the discovery that micronized solution styrene-butadiene rubber from postconsumer sources can be included in rubber formulations without severely compromising abrasion resistance. The micronized solution styrene-butadiene rubber utilized in the rubber formulations of this invention can be made by cryogenic grinding postconsumer rubber products using conventional procedures. For instance, it can be made by cryogenically grinding a tire tread containing a high level of solution styrene-butadiene rubber. The micronized solution styrene-butadiene rubber can then be blending into desired virgin rubbers and cured without significantly compromising the abrasion resistance of the rubber formulation. The rubber formulation of this invention is comprised of a natural or synthetic rubber and from 1 weight percent to 30 weight percent of a micronized rubber composition containing at least 10 weight percent solution styrene-butadiene rubber and having a particle size of 40 mesh to 200 mesh.

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