Impregnating composition, a process for its preparation and products prepared by using the composition

Claim 2

An impregnating composition suitable for use in imparting fire, water and freezing resistance to cellulose-based materials comprised of the following components: (a) an alkaline extract formed by contacting an alkali with a lignocellulose material; (b) a high molecular weight carbohydrate; and (c) an alkali or alkaline earth metal silicate or colloidal silica.

Claim 3

The impregnating composition of claim 1 comprising: (a) about 1 liter of said alkaline extract diluted with water to 5 to 15 times its volume; (b) about 100 to 300 grams of said high molecular weight carbohydrate; and (c) at least about 1 liter of alkali or alkaline earth metal silicate or at least about 180 grams of colloidal silica.

Claim 4

The impregnating composition of claim 2 wherein component (a) comprises an alkaline extract of straw.

Claim 5

The impregnating composition of claim 2 wherein component (b) comprises cellulose.

Claim 6

The impregnating composition of claim 2 wherein component (c) comprises potassium or sodium silicate.

Claim 7

The impregnating composition of claim 1 wherein component (a) is selected from the group consisting of cellulose, a cellulose derivative and starch.

Claim 8

The impregnating composition of claim 6 wherein said starch is selected from the group consisting of potato and corn starch.

Claim 9

A process for the preparation of an impregnating composition comprising the following components: (a) an alkaline extract formed by contacting an alkali with a lignocellulose material; (b) a high molecular weight carbohydrate; and (c) an alkali or alkaline earth metal silicate or colloidal silica, said process comprising admixing said alkaline extract with said high molecular weight carbohydrate such that said carbohydrate is dissolved therein, and subsequently combining said admixture with said alkali or alkaline earth silicate or colloidal silica.

Claim 10

A process for the preparation of an impregnating composition comprising the following components: (a) an alkaline extract formed by contacting an alkali with a lignocellulose material; (b) a high molecular weight carbohydrate; and (c) an alkali or alkaline earth metal silicate or colloidal silica, said process comprising admixing said alkaline extract with said high molecular weight carbohydrate such that said carbohydrate is dissolved therein, and subsequently combining said admixture with said alkali or alkaline earth silicate or colloidal silica.

Claim 11

The process of claim 8 wherein component (a) comprises an alkaline extract of straw.

Claim 12

The process of claim 8 wherein component (b) comprises cellulose.

Claim 13

The process of claim 8 wherein component (c) comprises potassium or sodium silicate.

Claim 14

The process of claim 8 wherein component (b) is selected from the group consisting of cellulose, cellulose derivatives and starch.

Claim 15

The process of claim 8 wherein said starch is selected from the group consisting of potato and corn starch.

Claim 16

The process of claim 8 wherein component (b) is selected from the group consisting of ethyl or methyl cellulose.

Claim 17

A process for the manufacture of a coating composition comprising admixing magnesium oxide with a composition comprised of the following components: (a) an alkaline extract formed by contacting an alkali with a lignocellulose material; (b) a high molecular weight carbohydrate; and (c) an alkaline or alkaline earth metal silicate or colloidal silica.

Claim 18

A process for the manufacture of a coating composition comprising admixing magnesium oxide with a composition comprised of the following components: (a) an alkaline extract formed by contacting an alkali with a lignocellulose material; (b) a high molecular weight carbohydrate; and (c) an alkaline or alkaline earth metal silicate or colloidal silica.