Flocced mineral materials and water-resistant articles made therefrom
AssigneeArmstrong World Industries, Inc.
InventorThomas M. Tymon
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Abstract
Disclosed are flocced mineral materials which may be utilized to prepare high temperature resistant, water resistant articles. These materials are prepared by utilizing, as a starting material, a gellable layered swelled silicate that has an average charge per structural unit that ranges from about -0.5 to -1 and which contains interstitial cations which promote swelling with a source of at least one species of an exchange cation that is derived from guanidine or compounds closely related thereto.
Claims31
A method of preparing a flocced mineral material that can be utilized to form a non-asbestos high temperature article that exhibits water resistance which method comprises contacting a swelled layer silicate gel having an average charge per structural unit that ranges from about -0.5 to about -1 and which contains exchangeable interstitial ions with at least one species of an exchange cation having the formula [R.sup.1 C(R.sup.2)R.sup.3 ]+ wherein R.sup.1 R.sup.2, and R.sup.3 are independently selected from NH.sub.2 and CH.sub.3 ;
- provided, however, that at least two or more of R.sup.1, R.sup.2, and R.sup.3 are NH.sub.2 but further providing that one or more of the hydrogen atoms of R.sup.1, R.sup.2, and R.sup.3 may instead be a substituent selected from:
- a C.sub.1 to C.sub.5 alkyl, a C.sub.2 to C.sub.5 alkenyl and a C.sub.2 to C.sub.5 alkynyl wherein these substituents may be linked to form one or more rings which may be saturated, unsaturated or aromatic;
- to thereby effect an ion exchange reaction between at least some of the exchangeable interstitial ions, and at least some of the exchange cations;
- further providing that the swelled layer silicate gel was prepared by contacting, for a sufficient time, a water swelling body of (a) vermiculite, (b) mica, or (c) a mixture of vermiculite and mica with a polar liquid to cause swelling of the crystals accompanied with the formation of a gel.
A flocced mineral material which comprises a swelled layered silicate gel that has an average charge per structural unit that ranges from about -0.5 to about -1, said silicate containing at least some interstitial cations that have the formula [R.sup.1 C(R.sup.2)R.sup.3 ]+ wherein R.sup.1, R.sup.2, and R.sup.3 are independently selected from NH.sub.2 and CH.sub.3;
- provided, however, that at least two or more of R.sup.1, R.sup.2, and R.sup.3 are NH.sub.2 but further providing that one or more of the hydrogen atoms of R.sup.1, R.sup.2, and R.sup.3 may instead be a substituent selected from:
- a C.sub.1 to C.sub.5 alkyl, a C.sub.2 to C.sub.5 alkenyl and a C.sub.2 to C.sub.5 alkynyl wherein these substituents may be linked to form one or more rings which may be saturated, unsaturated or aromatic;
- and further, provided that the silicate is a water swelling body of (a) vermiculite, (b) mica, or (c) a mixture of vermiculite and mica.
A method of preparing a high temperature silicate article that exhibits water resistance, which method comprises contacting an article formed from a swelled layered silicate gel that has a charge per structural unit that ranges from about -0.5 to about -1, and which contains exchangeable interstitial ions;
- with a source of at least one species of an exchange cation having the formula [R.sup.1 C(R.sup.2)R.sup.3 ]+ wherein R.sup.1, R.sup.2, and R.sup.3 are independently selected from NH.sub.2 and CH.sub.3 ;
- provided, however, that at least two or more of R.sup.1, R.sup.2, and R.sup.3 are NH.sub.2 but further providing that one or more of the hydrogen atoms of R.sup.1, R.sup.2, and R.sup.3 may instead be a substituent selected from:
- a C.sub.1 to C.sub.5 alkyl, a C.sub.2 to C.sub.5 alkenyl and a C.sub.2 to C.sub.5 alkynyl wherein these substituents may be linked to form one or more rings which may be saturated, unsaturated or aromatic;
- to thereby effect an ion exchange reaction between at least some of the exchangeable interstitial ions and at least some of the exchange cations;
- further providing that the swelled layered silicate gel was prepared by contacting, for a sufficient time, water swelling body of (a) vermiculite, (b) mica, or (c) a mixture of vermiculite and mica, with a polar liquid to cause swelling of the crystals accompanied with the formation of a gel.
Dependencies are inferred from the claim text.