Claims
- 1. Precipitated silica particulates suited for disintegration and homogeneous incorporation, dispersion and distribution within vulcanized elastomeric matrices reinforced therewith, said precipitated silica particulates comprising a powder having a CTAB specific surface ranging from 140 to 240 m2/g, a median diameter factor φ50, after ultrasonic disintegration, less than 5 μm, exhibiting an ultrasonic disintegration factor FD greater than 5.5 ml, having a BET specific surface ranging from 140 to 300 m2/g, having a mean particle size of at least 15 μm, a loose packing density of at least 0.17, a total pore volume of at least 2.5 cm3/g, a pore volume distribution such that the volume of pores having diameters ranging from 175 Å to 275 Å is less than 49% of the volumes of pores having diameters less than or equal to 400 Å and a DOP oil uptake ranging from 150 to 400 ml/100 g.
- 2. The precipitated silica of claim 1, wherein the mean particle size of the powder is between 15 μm and 60 μm.
- 3. The precipitated silica of claim 2, wherein the mean particle size of the powder is between 20 μm and 45 μm.
- 4. Precipitated silica particulates suited for disintegration and homogeneous incorporation, dispersion and distribution within vulcanized elastomeric matrices reinforced therewith, said precipitated silica particulates comprising substantially spherical beads having a CTAB specific surface ranging from 140 to 240 m2/g, a median diameter φ50, after ultrasonic disintegration, less than 5 μm, exhibiting an ultrasonic disintegration factor FD greater than 5.5 ml, having a BET specific surface ranging from 140 to 300 m2/g, having a mean particle size of at least 80 μm, a loose packing density of at least 0.17, a total pore volume of at least 2.5 cm3/g, a pore volume distribution such that the volume of pores having diameters ranging from 175 Å to 275 Å is less than 49% of the volume of pores having diameters less than or equal to 400 Å and a DOP oil uptake ranging from 150 to 400 ml/100 g.
- 5. The precipitated silica of claim 4, wherein the mean particle size of the spherical beads is between 100 μm and 300 μm.
- 6. The precipitated silica of claim 5, wherein the mean particle size of the spherical beads is between 100 μm and 270 μm.
- 7. Precipitated silica particulates suited for disintegration and homogeneous incorporation, dispersion and distribution within vulcanized elastomeric matrices reinforced therewith, said precipitated silica particulates comprising granulates having a CTAB specific surface ranging from 140 to 240 m2/g, a median diameter φ50, after ultrasonic disintegration, less than 5 μm, exhibiting an ultrasonic disintegration factor FD greater than 5.5 ml, having a BET specific surface ranging from 140 to 300 m2/g, having a dimension of at least 1 mm along the longest axis thereof, a total pore volume of at least 1 cm3/g, a pore volume distribution such that the volume of pores having diameters ranging from 175 Å to 275 Å is less than 49% of the volumes of pores having diameters less than or equal to 400 Å and a DOP oil uptake ranging from 150 to 400 ml/100 g.
- 8. The precipitated silica of claim 7, wherein the dimension of the granulates along the longest axis thereof is between 1 mm and 10 mm.
- 9. A vulcanized elastomeric matrix having a reinforcing filler material homogeneously dispersed and distributed therethrough, said reinforcing filler material comprising finely divided precipitated silica particulates and said precipitated silica particulates deriving from a powder having a CTAB specific surface ranging from 140 to 240 m2/g, a median diameter φ50, after ultrasonic disintegration, less than 5 μm, exhibiting an ultrasonic disintegration factor FD greater than 5.5 ml, having a BET specific surface ranging from 140 to 300 m2/g, having a mean particle size of at least 15 μm, a loose packing density of at least 0.17, a total pore volume of at least 2.5 cm3/g, a pore volume distribution such that the volume of pores having diameters ranging from 175 Å to 275 Å is less than 49% of the volumes of pores having diameters less than or equal to 400 Å and a DOP oil uptake ranging from 150 to 400 ml/100 g.
- 10. A vulcanized elastomeric matrix having a reinforcing filler material homogeneously dispersed and distributed therethrough, said reinforcing filler material comprising finely divided precipitated silica particulates and said precipitated silica particulates deriving from substantially spherical beads having a CTAB specific surface ranging from 140 to 240 m2/g, a median diameter φ50, after ultrasonic disintegration, less than 5 μm, exhibiting an ultrasonic disintegration factor FD greater than 5.5 ml, having a BET specific surface ranging from 140 to 300 m2/g, having a mean particle size of at least 80 μm, a loose packing density of at least 0.17, a total pore volume of at least 2.5 cm3/g, a pore volume distribution such that the volume of pores having diameters ranging from 175 Å to 275 Å is less than 49% of the volume of pores having diameters less than or equal to 400 Å and a DOP oil uptake ranging from 150 to 400 ml/100 g.
- 11. A vulcanized elastomeric matrix having a reinforcing filler material homogeneously dispersed and distributed therethrough, said reinforcing filler material comprising finely divided precipitated silica particulates and said precipitated silica particulates deriving from granulates having a CTAB specific surface ranging from 140 to 240 m2/g, a median diameter φ50, after ultrasonic disintegration, less than 5 μm, exhibiting an ultrasonic disintegration factor FD greater than 5.5 ml, having a BET specific surface ranging from 140 to 300 m2/g, having a dimension of at least 1 mm along the longest axis thereof, a total pore volume of at least 1 cm3/g, a pore volume distribution such that the volume of pores having diameters ranging from 175 Å to 275 Å is less than 49% of the volumes of pores having diameters less than or equal to 400 Å and a DOP oil uptake ranging from 150 to 400 ml/100 g.
Priority Claims (2)
Number |
Date |
Country |
Kind |
93 11553 |
Sep 1993 |
FR |
|
94 10046 |
Aug 1994 |
FR |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/446,797, filed Aug. 21, 1995, now abandoned.
US Referenced Citations (28)
Foreign Referenced Citations (7)
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1 054175 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
08/446797 |
Aug 1995 |
US |
Child |
08/808681 |
|
US |