Claims
- 1. A plurality of essentially spherical silica-based granular particulates having a mean particle size of at least 0.4 mm, apparent density of at least 0.35 g/ml, and having a total pore volume of at most 1.40 cm3/g.
- 2. The silica-based granular particulates as defined by claim 1, having a mean particle size of from 0.5 to 20 mm.
- 3. The silica-based granular particulates as defined in claim 1, having an apparent density ranging from 0.35 to 0.5 g/ml.
- 4. The silica-based granular particulates as defined by claim 1, comprising a silica having a BET surface area of at least 50 m2/g, and a CTAB surface area of at least 40 m2/g.
- 5. The silica-based granular particulates as defined by claim 1, wherein at least about 80% of the total pore volume thereof comprises pores having a diameter at most substantially equal to the following values in relationship to the BET surface area:50-100 m2/g:0.12 μm 100-150 m2/g:0.075 μm 150-200 m2/g:0.050 μm 200-250 m2/g:0.025 μm >250 m2/g:0.015 μm.
- 6. The silica-based granular particulates as defined by claim 1, comprising precipitated silica.
- 7. The silica-based granular particulates as defined by claim 1, comprising from about 0.5 to 35% by weight of a hydrophobizing agent.
- 8. A shaped article which comprises an elastomeric matrix and a reinforcing amount of a filler material therefor, said filler material comprising the silica-based granular particulates as defined by claim 1.
- 9. The silica-based granular particulates as defined by claim 2, having a mean particle size of from 0.5 to 10 mm.
- 10. The silica-based granular particulates as defined by claim 4, wherein said BET surface area ranges from 50 to 350 m2/g, and said CTAB surface area ranges from 40 to 320 m2/g.
- 11. The silica-based granular particulates as defined by claim 10, wherein said BET surface area ranges from 100 to 300 m2/g, and said CTAB surface area ranges from 80 to 270 m2/g.
- 12. The silica-based granular particulates as defined by claim 1, having a total pore volume ranging from 0.7 to 1.40 cm3/g.
- 13. A plurality of essentially spherical silica-based granular particulates having a mean particle size of at least 80 μm, an apparent density of at least 0.35 g/ml, and having a total pore volume of at most 1.40 cm3/g.
- 14. The silica-based granular particulates as defined by claim 13, having an apparent density ranging from 0.35 to 0.5 g/ml.
- 15. The silica-based granular particulates as defined by claim 13, comprising a silica having a B.E.T. surface area of at least 50 m2/g, and a CTAB surface area of at least 40 m2/g.
- 16. The silica-based granular particulates as defined by claim 1, having an apparent density of 0.41 g/ml.
- 17. The silica-based granular particulates as defined by claim 1, having an apparent density of 0.47 g/ml.
Priority Claims (2)
Number |
Date |
Country |
Kind |
86 08160 |
Jun 1986 |
FR |
|
87 05502 |
Apr 1987 |
FR |
|
Parent Case Info
This application is a continuation, of Application Ser. No. 08/250,950, filed May 27,1994 now abandoned; which is a continuation of Ser. No. 07/917,750, filed Jul. 24, 1992, now abandoned; which is a continuation of Ser. No. 07/569,212, filed Aug. 17, 1990, now abandoned; which is a continuation of Ser. No. 07/059,636, filed Jun. 8, 1987, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2353486 |
Dec 1977 |
FR |
Non-Patent Literature Citations (2)
Entry |
Webster'II New University Dictionary, p. 992. |
Concise Chemical and Technical Dictionary, ed. by H. Bennett Chemical Publishing Co., Inc. New York, NY p. 384.* |
Continuations (4)
|
Number |
Date |
Country |
Parent |
08/250950 |
May 1994 |
US |
Child |
08/400515 |
|
US |
Parent |
07/917750 |
Jul 1992 |
US |
Child |
08/250950 |
|
US |
Parent |
07/569212 |
Aug 1990 |
US |
Child |
07/917750 |
|
US |
Parent |
07/059636 |
Jun 1987 |
US |
Child |
07/569212 |
|
US |