Process for the production of polyurethane silicate foams and resinous products utilizing aldehyde-broken down alkali metal cellulose silicate polymer

Claim 2

The process for the production of an isocyanate-terminated polyurethane silicate prepolymer by mixing and reacting the following components: (a) aldehyde-broken down alkali metal cellulose silicate copolymer said broken down alkali metal cellulose silicate being produced by heating a mixture of a cellulose-containing plant, an alkali metal hydroxide and an oxidated silicon compound to 150° to 200° C. with agitation, (b) organic polyisocyanate or polyisothiocyanate; with the priviso that an excess of isocyanate groups are used.

Claim 3

The process of claim 1 wherein 1 to 99 parts by weight of the aldehyde-broken down alkali metal cellulose silicate copolymer are mixed with 50 to 99 parts by weight of an organic polyisocyanate or polyisothiocyanate.

Claim 4

The process of claim 1 wherein the organic polyisocyanate is selected from the group consisting of aliphatic, cycloaliphatic, araliphatic, aromatic and heterocyclic polyisocyanates and mixtures thereof.

Claim 5

The process of claim 1 wherein the organic polyisocyanate is selected from the group consisting of tolylene diisocyanate, the phosgenation product of an aniline-formaldehyde condensation and mixtures thereof.

Claim 6

The product produced by the process of claim 1.

Claim 7

The process of claim 1 wherein 1 to 50 parts by weight of a polyol is added with the aldehyde-broken down alkali metal cellulose silicate copolymer.

Claim 8

The product produced by the process of claim 6.

Claim 9

The process of claim 1 wherein 1 to 50 parts by weight of an alkali metal silicate selected from the group consisting of sodium silicate, potassium silicate and mixtures thereof is added with the aldehyde-broken down alkali metal cellulose silicate copolymer.

Claim 10

The product produced by the process of claim 8.

Claim 11

The process of claim 1 wherein 1 to 50 parts by weight of a polyol and 1 to 50 parts by weight of an alkali metal silicate selected from the group consisting of sodium silicate, potassium silicate and mixtures thereof is added with the aldehyde-broken down alkali metal cellulose silicate copolymer.

Claim 12

The product produced by the process of claim 10.

Claim 13

The process of claim 1 wherein an oxidated silicon compound selected from the group consisting of hydrate silica, silicoformic acid, natural silicate containing free silicic acid groups and mixtures thereof is added with the aldehyde-broken down alkali metal cellulose silicate copolymer.

Claim 14

The product produced in the process by claim 12.

Claim 15

The process of claim 1 wherein, an additional step is taken wherever 10% to 100% by weight of a curing agent, based on the weight of the reactants, and selected from the group consisting of water, water containing up to 10% by weight of an amine catalyst, water containing 10% to 60% by weight of a polyhydroxy compound, water containing 10% to 60% by weight of silica sol, water containing up to 5% by weight of an emulsifying agent, water containing 10% to 50% by weight of sodium silicate and mixtures thereof, is added and reacted with the isocyanate-terminated polyurethane silicate prepolymer thereby producing a polyurethane silicate product.