Precipitated silicas

Details Precipitated silicas Precipitated silicas

2005-12-20

2005-12-20

Hendrickson, Stuart (Department: 1754)

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

Reexamination Certificate

active

06977065

ABSTRACT:
A precipitated silica with the following physicochemical properties:BET surface area35 m2/g to 350 m2/gBET/CTAB surface area ratio0.8 to 1.1Pore volume, PV1.6 ml/g to 3.4 ml/gSilanol group density3 ml/(1.5 g) to 9.5 ml/(1.5 g)(V2= NaOH consumption)Average aggregate size250 nm to 1500 nmCTAB surface area30 m2/g to 350 m2/gDBP value150 ml/100 g to 300 ml/100 gV2/V1by Hg porosimetry0.19 to 0.46DBP/CTAB1.2 to 3.5is produced by reacting alkali silicate with mineral acids at temperatures of 60° C. to 95° C. while maintaining a pH of 7.5 to 10.5 and continuously stirring, continuing the reaction to a solids concentration in the precipitation suspension of 90 g/l to 120 g/l, adjusting the pH value to a value of less than or equal to 5, filtering out, washing, drying and optionally grinding or granulating the precipitated silica. The precipitated silica is used as a filler in vulcanizable rubber compounds and vulcanizates.

REFERENCES:
patent: 3235331 (1966-02-01), Nauroth
patent: 4590052 (1986-05-01), Chevallier
patent: 4681750 (1987-07-01), Johnson
patent: 4704425 (1987-11-01), Lagarde et al.
patent: 5094829 (1992-03-01), Krivak
patent: 5227425 (1993-07-01), Rauline
patent: 5256196 (1993-10-01), Chjonowski et al.
patent: 5342598 (1994-08-01), Persello
patent: 5484581 (1996-01-01), Esch et al.
patent: 5705137 (1998-01-01), Goerl et al.
patent: 5846506 (1998-12-01), Esch et al.
patent: 5859117 (1999-01-01), Goerl et al.
patent: 5871867 (1999-02-01), Rausch et al.
patent: 5925708 (1999-07-01), Esch et al.
patent: 6169135 (2001-01-01), Chevallier et al.
patent: 6180076 (2001-01-01), Uhrlandt et al.
patent: 6214383 (2001-04-01), Esch et al.
patent: 6335396 (2002-01-01), Chevallier et al.
patent: B18536 (1992-06-01), None
patent: AS1467019 (1963-02-01), None
patent: 1467019 (1969-01-01), None
patent: DT 1467019 (1970-07-01), None
patent: OS2342713 (1973-08-01), None
patent: 2342713 (1974-03-01), None
patent: DP P4334201.9 (1994-04-01), None
patent: 0157703 (1985-10-01), None
patent: 396450 (1989-05-01), None
patent: 0407262 (1991-01-01), None
patent: 520862 (1991-06-01), None
patent: 0520862 (1992-02-01), None
patent: 0501227 (1992-09-01), None
patent: EP 396450 (1990-04-01), None
patent: EP 520862 (1992-06-01), None
patent: 2069 129 (1985-07-01), None
patent: 2169129 (1986-07-01), None

Affiliated with

Also associated with

Rating

Precipitated silicas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Precipitated silicas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precipitated silicas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3523090