| PATENT ASSIGNEE'S COUNTRY | Japan |
| UPDATE | 07.99 |
| PATENT ASSIGNEE | Sumitomo Rubber Industries |
| PATENT CLAIMS |
- Rubber (100 parts) selected from: natural rubber, butadiene rubber, styrene-butadiene rubber, isoprene rubber & EPDR - C black (5-50 parts) having size > 20 nm, compression DBP oil absorption No. < 120 ml/100 g & CTAB area < 130 square.m/g - Precipitated silica (10-60 parts) having DBP oil absprption No. > 200 ml/100 g, BET N adsorption specific surface area < 180 square.m/g & - Silane coupler in amount (X) = (A x B x P x D)/(E x C) x 100 C = 2.6-5.1; "A" is No. of SiOH existing per 1 square.nm of surface area of silica, "B" is BET area, "C" is factor showing reactivity of silane coupler to silica; "D" is MW of coupler, "E" is Avogadro's constant & "P" = 10 to the 18th power |
| PATENT PHOTOCOPY | Available on request |
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