Rubber terpene footwear
AssigneeThe North Face Apparel Corp.
InventorsKelsey Novak, Emily Fesquet Alati
Life of this patent
Estimating the term…
Abstract
Disclosed is a rubber composition for footwear. The rubber composition may comprise from 3 phr to 90 phr of a first rubber component, from 5 phr to 100 phr of a second rubber component, from 1 phr to 10 phr of a tackifying resin, from 10 phr to 60 phr of a reinforcing filler component, from 1 phr to about 10 phr of a plasticizer component, from 0.1 phr to 5 phr of a curing component. The rubber composition may exhibit a wet coefficient of friction of from 0.4 to 0.65 when tested in accordance with SATRA TM144, a dry coefficient of friction of from 0.76 to 0.90 when tested in accordance with SATRA TM144, and a DIN abrasion of 140 to 300 when tested in accordance with DIN 53616.
Claims14
A rubber composition for footwear, the rubber composition comprising:
- from about 3 phr to 95 phr of a halobutyl rubber component;
- from about 5 phr to about 97 phr of a natural rubber component;
- from about 2 phr to about 6 phr of a tackifying resin comprising a polyterpene resin,
- wherein the polyterpene resin comprises an alpha-pinene or beta-pinene derived polyterpene polymer;
- from about 10 phr to about 60 phr of a reinforcing filler component;
- from about 1 phr to about 10 phr of a plasticizer component,
- from about 0.1 phr to about 5 phr of a curing component,
- wherein the rubber composition has a wet coefficient of friction of from about 0.4 to about 0.65 when tested in accordance with SATRA TM144,
- wherein the rubber composition has a dry coefficient of friction of from about 0.76 to about 0.90 when tested in accordance with SATRA TM144,
- wherein the rubber composition has a DIN abrasion of greater than 140 when tested in accordance with DIN 53616, and
- wherein the rubber composition exhibits Die C Tear strength greater than the Die C Tear strength of a substantially similar composition in the absence of the tackifying resin when tested in accordance with ASTM D624.
A method of forming a rubber composition for footwear, the method comprising:
- combining:
- from about 3 phr to 90 phr of a first rubber component;
- from about 10 phr to about 90 phr of a second rubber component;
- from about 3 phr to about 6 phr of a polyterpene resin;
- from about 10 phr to about 60 phr of a silica;
- from about 0.1 phr to about 15 phr of a curing component;
- and
- from about 1 phr to about 10 phr of a plasticizing agent;
- to form a first rubber mixture;
- combining the first rubber mixture with a curing agent to provide a second rubber mixture;
- and
- subjecting the second rubber mixture to a curing process to provide the rubber composition.
Dependencies are inferred from the claim text.