Claims
- 1. An elastomeric shaped article having improved tensile strength and tear strength which comprises a reinforcing amount of a particulate silica filler material for said elastomeric shaped article, said silica filler material comprising at least one precipitated silica having (i) a CTAB surface area of from 20 to 200 m.sup.2 /g, (ii) a mean projected area of aggregates of greater than about 10,000 nm.sup.2, and (iii) an inter-aggregate volume of at least 1 cm.sup.3 /g and (iv) a DPB oil absorption capacity no greater than 300 ml/100 g, and an essentially homogeneous inter-aggregate pore population wherein:
- (a) for a CTAB surface area of from 20 to 70 m.sup.2 /g, the mean projected area of aggregates is at least about 30,000 nm.sup.2 ;
- (b) for a CTAB surface area of from 70 to 120 m.sup.2 /g, the mean projected area of aggregates is at least about 25,000 nm.sup.2 ; and
- (c) for a CTAB surface area of from 120 to 200 m.sup.2 /g, the mean projected area of aggregates is at least about 15,000 nm.sup.2.
- 2. The elastomeric shaped article as defined by claim 1, said at least one precipitated silica having a CTAB surface area of from 20 to 70 m.sup.2 /g, and a mean projected area of at least about 30,000 nm.sup.2.
- 3. The elastomeric shaped article as defined by claim 1, said at least one precipitated silica having a CTAB surface area of from 70 to 120 m.sup.2 /g, and a mean projected area of at least about 25,000 nm.sup.2.
- 4. The elastomeric shaped article as defined by claim 1, said at least one precipitated silica having a CTAB surface area of from 120 to 200 m.sup.2 /g, and a mean projected area of at least about 15,000 nm.sup.2.
- 5. The elastomeric shaped article as defined by claim 4, said at least one precipitated silica having a DBP oil absorption capacity no greater than 300 ml/100 g.
- 6. The elastomeric shaped article as defined by claim 1, said at least one precipitated silica having a CTAB surface area of from 20 to 120 m.sup.2 /g, and a DBP oil absorption capacity no greater than 300 ml/100 g.
- 7. The elastomeric shaped article as defined by claim 1, the ratio of BET surface area/CTAB surface area of said at least one precipitated silica ranging from about 1 to 1.2.
- 8. The elastomeric shaped article as defined by claim 1, comprising a tire.
Priority Claims (1)
Number |
Date |
Country |
Kind |
85 13579 |
Sep 1985 |
FRX |
|
Parent Case Info
This application is a continuation of application Ser. No. 186,740, filed Apr. 25, 1988, which in turn is a continuation of application Ser. No. 907,314, filed Sept. 15, 1986, now both abandoned.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
4059558 |
Golombeck et al. |
Nov 1977 |
|
4251281 |
Machurat et al. |
Feb 1981 |
|
4273589 |
Nauroth et al. |
Jun 1981 |
|
4409356 |
Lagarde et al. |
Oct 1983 |
|
4590052 |
Chevallier et al. |
May 1986 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
11004 |
Jul 1984 |
FRX |
0164345 |
Sep 1984 |
JPX |
Continuations (2)
|
Number |
Date |
Country |
Parent |
186740 |
Apr 1988 |
|
Parent |
907314 |
Sep 1986 |
|