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US3915735A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for preparing modified silicic fillers

Assignee: Malvern Minerals Co
•
Filing: 1974-03-06
•
Granted: 1975-10-28
•
Expires: 1994-03-06
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Abstract

Abstract A monomeric silane is sprayed or poured onto microcrystalline novaculite which is being agitated in a high intensity mixing apparatus at a temperature between about 70*F and 350*F, and the monomeric silane and microcrystalline novaculite are allowed to remain in situ at a temperature between about 70*F and 350*F for at least about 1 minute. Especially advantageous results are obtained when: (a) the microcrystalline novaculite is a granular lameller and clustered structure having an aged surface, a particle size of between about 0.25 Mu and about 150 Mu , and a specific heat of about 0.19 cal/g/*C; and (b) the monomeric silane is an organosilicon compound having the general formula R-Si X3, wherein R is a group attached to the silicon in a thermally and hydrolytically stable manner and X is a hydrolyzable group selected from chlorine, bromine, iodine, alkoxy, and acetoxy. The modified silicic fillers so prepared have special utility in enhancing the properties of polymeric compositions.

Inventors

  • 👤 James E Moreland

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 06:02
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/12; C08; C08K; C08K9/00; C08K9/04; C08K9/06; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/50; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/32

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 107 words
A PROCESS FOR THE PREPARATION OF A MODIFIED SILICIC FILLER HAVING SPECIAL UTILITY IN ENHANCING THE PROPERTIES OF POLYMERIC COMPOSITION WHICH PROCESS COMPRISES EFFECTING INTERACTION BETWEEN A MICROCRYSTALLINE NOVACULITE AND 0.01 TO 5.0 PERCENT BY WEIGHT BASED UPON THE WEIGHT OF THE MICROCRYSTALLINE NOVACULITE OF A MONOMERIC SILANE THE INTERACTION BEING EFFECTED BY SPRAYING OR POURING THE MONOMERIC SILANE ONTO THE MICROCRYSTALINE NOVACULITE BEING AGITATED IN A HIGH INTENSITY MIXING APPARATUS AT A TEMPERATURE BETWEEN ABOUT 70*F AND ABOUT 350*F AND ALLOWING THE MONOMERIC SILANE AND MICROCRYSTALLINE NOVACULITE TO REMAIN IN SITU AT A TEMPERATURE BETWEEN ABOUT 70/*F AND ABOUT 350*F FOR AT LEAST ABOUT 1 MINUTE.
Claim 2
Dependent Claim 107 words
A PROCESS FOR THE PREPARATION OF A MODIFIED SILICIC FILLER HAVING SPECIAL UTILITY IN ENHANCING THE PROPERTIES OF POLYMERIC COMPOSITION WHICH PROCESS COMPRISES EFFECTING INTERACTION BETWEEN A MICROCRYSTALLINE NOVACULITE AND 0.01 TO 5.0 PERCENT BY WEIGHT BASED UPON THE WEIGHT OF THE MICROCRYSTALLINE NOVACULITE OF A MONOMERIC SILANE THE INTERACTION BEING EFFECTED BY SPRAYING OR POURING THE MONOMERIC SILANE ONTO THE MICROCRYSTALINE NOVACULITE BEING AGITATED IN A HIGH INTENSITY MIXING APPARATUS AT A TEMPERATURE BETWEEN ABOUT 70*F AND ABOUT 350*F AND ALLOWING THE MONOMERIC SILANE AND MICROCRYSTALLINE NOVACULITE TO REMAIN IN SITU AT A TEMPERATURE BETWEEN ABOUT 70/*F AND ABOUT 350*F FOR AT LEAST ABOUT 1 MINUTE.
Claim 3
Dependent Claim 41 words
The process of claim 1, wherein the microcrystalline novaculite is a granular lameller and clustered structure having an aged surface, a particle size of between about 0.25 Mu and about 150 Mu , and a specific heat of about 0.19 cal/g/*C.
Claim 4
Dependent Claim 75 words
The process of claim 2, wherein the monomeric silane is an organosilicon compound having the general formula R-SiX3, wherein R is a group attached to the silicon in a thermally and hydrolytically stable manner, R being selected from the class consisting of aliphatic, cycloaliphatic, aromatic, amino, polyamino, mercapto, methacrylo, glycidoxy, epoxy, vinyl, aminopropyl, mercaptopropyl, methacrylopropyl, methacryloxypropyl, glycidoxypropyl, epoxypropyl, chloroalkyl, and epoxycyclohexyl; and X is a hydrolyzable group selected from chlorine, bromine, iodine, alkoxy, and acetoxy.
Claim 5
Dependent Claim 49 words
The process of claim 3, wherein R is a group selected from epoxy, amino, and polyamino, and an interaction temperature of at least about 300* F is achieved, at which temperature the monomeric silane and microcrystalline novaculite are allowed to remain in situ for at least about 1 minute.
Claim 6
Dependent Claim 34 words
The process of claim 1, wherein the frictional heat generated in the microcrystalline novaculite by the high intensity mixing apparatus is employed to effect the interaction between the monomeric silane and the microcrystalline novaculite.

References Cited (Backward Citations)

US3227675A Cited
US3677784A Cited
US3740371A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-10-27 1979-04-28 1979-10-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-10-27 1983-04-28 1983-10-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-10-27 1987-04-28 1987-10-28 $7700.00 Window Closed / Lapsed

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