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US4374178A
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Silanated calcium carbonate fillers
Assignee: Witco Corp
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Filing: 1980-12-29
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Granted: 1983-02-15
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Expires: 2000-12-29
Abstract
Abstract Calcium carbonate is rendered receptive to silanation by pretreatment with soluble sodium silicate.
Inventors
- 👤 Ravindra D. Kulkarni
- 👤 Errol D. Goodard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:13
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/02; C09C1/021; C08; C08K; C08K9/00; C08K9/04; C08K9/06; C09C3/00; C09C3/006; C09C3/06; C09C3/12; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/258; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
A calcium carbonate filler composition which comprises a mixture of (I) particulate calcium carbonate, (II) sodium silicate, and (III) a silane having the formula R(R.sup.1).sub.a Si(X).sub.3-a wherein R which contains a carbon atom directly bonded to the silicon atom of the above formula represents an organic radical, R 1 represents a radical selected from the group consisting of R and monovalent hydrocarbon radicals, a has a value of 0 or 1, and X represents a hydrolyzable group, the hydrolyzates of said silanes, the condensates of said silanes, and mixtures thereof, which composition has been heated to a temperature in the range 100° C. to 140° C. for a period of time in the range one to eight hours.
Claim 2
Dependent Claim
118 words
A calcium carbonate filler composition which comprises a mixture of (I) particulate calcium carbonate, (II) sodium silicate, and (III) a silane having the formula R(R.sup.1).sub.a Si(X).sub.3-a wherein R which contains a carbon atom directly bonded to the silicon atom of the above formula represents an organic radical, R 1 represents a radical selected from the group consisting of R and monovalent hydrocarbon radicals, a has a value of 0 or 1, and X represents a hydrolyzable group, the hydrolyzates of said silanes, the condensates of said silanes, and mixtures thereof, which composition has been heated to a temperature in the range 100° C. to 140° C. for a period of time in the range one to eight hours.
Claim 3
Dependent Claim
15 words
A calcium carbonate filler composition as in claim 1 wherein component (III) is octyl trimethoxysilane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |