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US 4,800,041 AGranted
Suspensions of sheet silicate materials and products made therefrom
AssigneeArmstrong World Industries, Inc.
InventorsThomas M. Tymon, Shelly S. Niznik
Life of this patent
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Abstract
An aqueous suspension of sheet silicate and the method of making the same are disclosed. The suspension is produced by treating crystals of 2:1 layer sheet silicates with a solution containing a water soluble salt of a cation of a secondary, tertiary or quaternary alkyl ammonium compound and thereafter dispersing the vermiculite crystals.
Claims17
A composition comprising:
- a 2:1 layered silicate material selected from the group consisting of mica and vermiculite having alkyl ammonium cations which correspond to the formula ##STR3## wherein R, R.sub.1, R.sub.2 and R.sub.3 are independently selected from H or a C.sub.2-4 alkyl group, further providing that no more than two of R, R.sub.1, R.sub.2 and R.sub.3 are hydrogen.
A method of preparing a flocced mineral suspension of sheet silicates, which comprises:
- (a) treating 2:1 layered silicate crystals selected from the group consisting of mica and vermiculite with a solution containing a cation selected from the group consisting of diethyl ammonium, triethyl ammonium, tetraethyl ammonium, and dipropyl ammonium, for an effective length of time to allow ion exchange, and to swell layers of the silicate crystals;
- and
- (b) dispersing the layers using shear stress to thereby form an aqueous sheet silicate suspension, and then;
- (c) contacting the sheet silicate suspension with at least one species of guanidine cation analogs to thereby effect an ion exchange reaction between at least some exchangeable interstitial ions in the silicate crystals and at least some of the guanidine cations to form a flocced mineral suspension.
1 more element
A method of preparing a flocced mineral suspension of sheet silicates, which comprises:
- (a) treating 2:1 layered silicate crystals selected from the group consisting of mica and vermiculite with a solution containing a cation selected from the group consisting of:
- diethyl ammonium, triethyl ammonium, tetraethyl ammonium, and dipropyl ammonium, for an effective length of time to allow ion exchange, and to swell layers of the silicate crystals;
- and
- (b) dispersing the layers using shear stress to thereby form an aqueous sheet silicate suspension, and;
- then
- (c) contacting the sheet silicate suspension with at least one species of multiamine derived cations to thereby effect an ion exhcnage reaction between at least some exchangeable interstitial ions in the silicate crystals and at least some of the multiamine derived cations to form a flocced mineral suspension.
3 more elements
A composition comprising:
- a potassium-depleted natural mica having diethyl ammonium cations which were introduced into the potassium-depleted natural mica by ion exchange, wherein the mica can be sheared in water to produce a dispersion.
A composition comprising:
- a 2:1 layered silicate material selected from the group consisting of mica and vermiculite having alkyl ammonium cations which correspond to the formula:
- ##STR4## wherein R, R1, R2, and R3 are independently hydrogen or an alkyl group having two or three carbon atoms per group, provided however, that no more than two of R, R.sub.1, R.sub.2, R.sub.3 are hydrogen, and further providing that the composition can be sheared in water to produce a dispersion.
A composition comprising:
- a 2:1 layered silicate material selected from the group consisting of mica and vermiculite wherein the said silicate material has dipropyl ammonium cation which were introduced by ion exchange, further providing that the composition can be sheared in water to produce a dispersion.
A composition comprising:
- a 2:1 layered silicate material selected from the group consisting of mica and vermiculite wherein the said silicate material has diethyl ammonium cations which were introduced by ion exchange, further providing that the composition can be sheared in water to produce a dispersion.
A method of preparing an aqueous suspension of sheet silicates, which comprises:
- (a) treating 2:1 layered silicate crystals selected from the group consisting of mica and vermiculite with a solution;
- said solution containing a cation having the formula:
- ##STR5## wherein R, R1, R2, and R3 are independently hydrogen or an alkyl group having two or three carbon atoms per group, provided however, that no more than two of R, R.sub.1, R.sub.2, and R.sub.3 are hydrogen;
- for an elective length of time to allow ion exchange and swell layers of the silicate crystals;
- and
- (d) dispersing the layers in water using shear stress to thereby form an aqueous sheet silicate suspension the composition can be sheared in water to produce a dispersion.
3 more elements
A method of preparing an aqueous suspension of natural mica which comprises:
- (a) treating potassium depleted natural mica with a solution having diethyl ammonium cations for an effective length of time to allow ion exchange, and swell layers of the natural mica;
- and
- (b) dispersing the layers in water using shear stress to thereby form a sheet silicate suspension.
Dependencies are inferred from the claim text.