07307121 is referenced by 22 patents and cites 29 patents.

This invention discloses a method for preparing rubber compositions that exhibit unique combinations of properties that are desirable for tire tread applications for enhanced snow/ice and wet traction, low rolling resistance and increased treadwear performance in comparison with conventional silica compounds. Specifically, a high reactively silane coupling agent, such as a mercaptosilane, is used in combination with a silane coupling typically used for silica tread compounds such as bis(triethoxylsilylpropyl)disulfide to treat silica pellets in a hydrocarbon solvent at elevated temperatures. The treated silica is then blended with solution elastomer cement in a hydrocarbon solvent. The deposited reactive silanes partially react with the elastomer molecules forming a layer of polymer grafted on the silica surfaced. This structure significantly improves the silica retention during the steam stripping operation. Almost 100% (99+%) silica retention has been achieved by this invention. After solvent removal from steam stripping, the treated silica/elastomer mixer is dewatered and dried using conventional equipment such as shaker screens, expellers and expanders to form a well-dispersed silica masterbatch. This technique results in silica compounds with excellent silica dispersion and increased filler-polymer interaction, hence enhanced compound performance such as better physical properties, more desirable dynamic properties (low hysteresis at high temperatures and high hysteresis at low temperatures) and increased abrasion resistance.

Title
Silica containing rubber composition
Application Number
10/805457
Publication Number
7307121 (B2)
Application Date
March 19, 2004
Publication Date
December 11, 2007
Inventor
Sun Lin Chen
Akron
OH, US
Ping Zhang
Hudson
OH, US
Agent
Alvin T Rockhill
Assignee
The Goodyear Tire & Rubber Company
OH, US
IPC
B08K 3/00
B60C 11/00
C08L 83/06
B05D 3/10
C08K 5/54
C08K 3/36
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