Inorganic-organic plastic

• US 4,042,536 A
• Filed: 11/26/1974
• Issued: 08/16/1977
• Est. Priority Date: 11/30/1973
• Status: Expired due to Term

• Current Assignee: Bayer AG
• Original Assignee: Bayer AG
• Inventors: Reiff, Helmut, Dieterich, Dieter, Markusch, Peter
• Primary Examiner(s): Ivy, C. Warren
• Application Number:
  US05/527,386
• Time in Patent Office: 994 Days
• Field of Search: 260/2.5 AK, 260/29.2 TN, 260/37 N, 260/2.5 AM
• US Class Current: 521/122
• CPC Class Codes: C08G 18/0804 Manufacture of polymers containing ionic or ionogenic groups
• CPC Class Codes: C08G 18/302 Water
• CPC Class Codes: C08G 18/3895 Inorganic compounds, e.g. aqueous alkalimetalsilicate solutions; Organic derivatives thereof containing no direct silicon-carbon bonds
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08L 75/00 Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
• CPC Class Codes: Y10S 521/906 Polyurethane cellular product containing unreacted flame-retardant material

Abstract

An inorganic-organic plastic having improved strength, elasticity, dimensional stability with increase in temperature and flame resistance and adapted for use in filling cracks and cavities and for making materials useful in the building industry is prepared by (1) premixing (c) an organic compound having at least one reactive hydrogen and at least one ionic group or at least one non-ionic hydrophilic group with (b) an aqueous silicate and then mixing the resulting mixture with (a) an organic polyisocyanate or (2) mixing (a), (b) and (c) simultaneously and reacting the mixture thus obtained to form a colloidal xerosol.

Claims

1. A process for producing an inorganic-organic plastic with high strength, elasticity, dimensional stability under heat, and flame resistance, which is a composite material of a polymer/polysilicic acid gel, said composite being in the form of a solid/solid xerosol, said process comprising mixing and reacting:

A. an organic polyisocyanate,

B. a silica composition selected from the group consisting of;

i. an aqueous alkali metal silicate containing about 20 - 70% by weight of said alkali metal silicate;

ii. an aqueous silica sol having a solids content from 20 to 50%, and

iii. mixtures thereof,

C. an organic compound which contains

i. at least one hydrogen atom capable of reacting with an isocyanate group, and

ii. at least one group selected from the group consisting of;

a. an ionic group,

b. a group capable of forming an ionic group in the presence of an alkali metal silicate, and

c. non-ionic hydrophilic groups, said non-ionic hydrophilic group being polyether groups which are built up from ethylene oxide to an extent of at least 10% by weight, with the proviso that if said organic compound contains non-ionic hydrophilic groups, said organic compound contains only one hydrogen atom capable of reacting with an isocyaanate group,

said mixing being carried out in such a way that either components (B) and (C) are mixed prior to mixing with (A), or components (A), (B) and (C) are mixed simultaneously.

2. The process of claim 1, wherein the organic polyisocyanate is the phosgenation product of an aniline-formaldehyde condensation.

3. The process of claim 1, wherein the proportion by weight of component (A) to component (B) is between 70:

30 and 20;

80.

4. The process of claim 1, wherein the quantity of groups (C)(ii)(a) or (b) is 2-200 milliequivalents per 100 grams of components (A), or the non-ionic hydrophilic groups of component (C) comprises 1-50% by weight based on component (A).

5. The process of claim 1, wherein compounds in addition to isocyanates which effect hardening of the water soluble silicates are included in the mixture.

6. The process of claim 1 wherein 0-40% by weight of an inert liquid boiling in the range of -25°

to +80°

C is included in the reaction mixture as a blowing agent and the reaction proceeds with concomitant foaming.

7. The process of claim 1, wherein 0.001 - 10% by weight of activator is included in the reaction mixture.

8. The process of claim 1, wherein 0-20% by weight of foam stabilizer is included in the reaction mixture.

9. The process of claim 1, wherein 0-20% by weight of emulsifying agent is included in the reaction mixture.

10. The process of claim 1, wherein an inorganic or organic particulate or pulverulent material is included in the reaction mixture.

11. The process of claim 1, wherein the organic compound (C) is a compound of the formula:

space="preserve" listing-type="equation">X -- R -- Y

wherein

X = --oh, --sh, --cooh, --nhr¹

r = c₁ -c₂₀ -alkylene, ##STR7## R¹ = --H, C₁ -C₁₂ -alkyl, ##STR8## Y = --SO₃ H, --COOH, --SO₃.sup.(^-), --OSO₃.sup.(^-), --C00.sup.(^-), NR₃¹(⁺), --O--(--CH₂ --CH₂ --O)--_n R¹, or, ##STR9## with at least 10% --O(--CH₂ --CH₂ --O--)--_n R¹ blocks,

n = 2-100.

12. The process of claim 1, wherein said silica compound is an aqueous alkali metal silicate.

13. The product produced by the process of claim 12.

14. The product of the process produced by claim 1.