WO1996025475B1

WO1996025475B1 - Stable and water-resistant aqueous foam composition_____________

Info

Publication number: WO1996025475B1
Application number: PCT/US1996/002027
Authority: WO
Filing date: 1996-02-14
Publication date: 1996-10-24
Anticipated expiration: 1997-08-14

Abstract

Stable and water-resistant aqueous foam composition containing (1) a long-chain cationic organic compound and (2) a long-chain anionic organic compound in a weight ratio of from 0.05:1 to 15:1. The stable foam composition of the invention may be mixed with various water soluble or water dispersible organic, polymeric, or inorganic substances and used in applications where lightweight, heat, sound or other insulative, barrier properties or homogeneous material distribution are needed. Such applications include cementitious or gypsum containing substances, adhesives, binders, paper treating materials, coatings, ceramics, landfills, geofills, and firefighting and fireproofing materials.

Claims

36AMENDED CLAIMS[received by the International Bureau on 13 September 1996 (13.09.96); original claims 1 and 11 amended; remaining claims unchanged (3 pages)]

1. (Amended) A composition for use in the making of an aqueous foamed composition comprising:

a long-chain organic cation.-forming, compound having the formula (I) :

^Ri

I +

R-N-R₂ X^" I (I)

«3 where R is an aliphatic hydrocarbon radical having from 8 to 24 carbon atoms; Rl is selected from the group consisting of an alkyl group having from 1-16 carbon atoms, a hydroxyalkyl group having from 1-16 carbon atoms, a benzyl group, a group which, when taken together with the nitrogen, represents a heterocyclic radical, and any of said groups having a hydrogen atom replaced by a fluorine atom; R2 and R3 are selected from the group consisting of an alkyl group having from 1-6 carbon atoms, a hydroxyalkyl group having from 1-6 carbon atoms, a benzyl group, a hydrogen atom, a group which, when taken together with the nitrogen, represents a heterocyclic radical, and any of said groups having a hydrogen atom replaced by a fluorine atom; and X- is an anionic counter ion; and

a long-chain organic anion-forming compound having the formula (II) :

R-X- Y+ (II)

where R is an aliphatic hydrocarbon radical with 10 to 24 carbon atoms; X- is an anionic group selected from the group consisting of carboxylate, sulfate, sulfonate, and phosphate; and Y+ is a cationic counter ion selected from the group consisting of ammonium, sodium, and potassium salt ; 37

wherein the cation formed from said long-chain organic cation-forming compound and the anion formed from said long-chain organic anion-forming compound are present in a weight ratio of from 0.05 : 1 to 15 : 1;

and wherein at least one of said lσπg-σhain organic cation-forming compound and said long-chain organic anion-forming compound is a preformed foam.

2. The composition of claim 1 wherein said long- chain organic cation-forming compound is a salt of long- chain alkyltrimethyl ammonium cation with the alkyl group having 10 to 22 carbon atoms.

3. The composition of claim 2 wherein said long- chain organic cation-forming compound is selected from the group consisting of dodecyltrimethylammonium bromide (or chloride) , tetradecyltrimethylammonium bromide (or chloride) , hexadecyltrimethylammonium bromide (or chloride) , octadecyltrimethylammonium bromide (or chloride) , cetyltrimethylammonium bromide (or chloride) , cetylbenzyldimethylammonium chloride, cetyltriethyl- ammmonium bromide; and mixtures thereof.

. The composition of claim 1 wherein said long- chain organic anion-forming compound is a salt of a fatty acid containing principally 10 to 24 carbon atoms.

5. The composition of claim 4 wherein said long- chain organic anion-forming compound is selected from the group consisting of ammonium stearate, potassium stearate, and sodium stearate.

6. The composition of claim 1 wherein said weight ratio is from 0.2 : 1 to 5 : 1.

7. The composition of claim 1 wherein said weight ratio is from 0.4 : 1 to 2.5 : 1.

8. The composition of claim 1 further comprising an additive selected from the group consisting of a water- dispersible polymeric species with a glass transition temperature from -85°C to +80°C, a water-soluble polymeric species with a glass transition temperature from -85°C to +80°C, a foaming agent, a sizing agent, a pigment, a dye, and a thickener.

9. The composition of claim 1 further comprising a filler selected from the group consisting of clay and calcium carbonate.

10. The composition of claim 1 further comprising a hydraulic substance selected from the group consisting of cement, gypsum, sand, polymeric cement binder, fiber, mineral wood, scrim, accelerators, and retarders.

11. (Amended) A process of preparing an aqueous foam comprising the steps of:

(a) generating a preformed foam by agitating a first liquid comprising water and one of

a long-chain organic cation-forming compound having the formula (I) :

Ri

I +

R - N-R₂ X^" I (I)

where R is an aliphatic hydrocarbon radical having from 8 to 24 carbon atoms; Rl is selected from the group consisting of an alkyl group having from 1-16 carbon atoms, a hydroxyalkyl group having from 1-16 carbon atoms, a benzyl group, a group which, when taken together with the nitrogen, represents a heterocyclic radical, and any of said groups having a hydrogen atom replaced by a fluorine atom; R2 and R3 are