Foaming resin composition, plastic foam formed from the composition, and method for forming the plastic foam

Abstract

A foaming resin composition consisting essentially of (A) an organic compound having a carbon-carbon double bond, (B) a compound having an SiH group, and (C) a compound having an OH group is foamed and cured at room temperature or under heat at relatively low temperatures, to obtain hard, semi-hard or soft plastic foam having good weather resistance and good compatibility with coating compositions and adhesives.

Description

Claims

1. A foaming resin composition comprising;

(A) an organic compound having a carbon-carbon double bond but having no siloxane unit in the molecular skeleton,

(B) a compound having an SiH group, and

(C) a compound having an OH group.

2. The foaming resin composition as claimed in claim 1, wherein the molecular skeleton of the organic compound for the component (A) is composed of at least one or more element selected from carbon, oxygen, hydrogen, nitrogen, sulfur and halogen atoms.

3. The foaming resin composition as claimed in claim 1, wherein the molecular skeleton of the organic compound for the component (A)is a polyether-type, organic polymer skeleton.

4. The foaming resin composition as claimed in claim 1, wherein the molecular skeleton of the organic compound for the component (A) is a phenol-formaldehyde-type, organic polymer skeleton.

5. The foaming resin composition as claimed in claim 1, wherein the molecular skeleton of the organic compound for the component (A) is a bisphenol-type skeleton.

6. The foaming resin composition as claimed in claim 1, wherein the organic compound for the component (A) has a molecular skeleton of the following formula: ##STR1## wherein R.sup.1 represents H or CH.sub.3 ; R.sup.8 and R.sup.9 each represent a divalent substituent having from 0 to 6 carbon atoms and composed of constitutive element(s) selected from only C, H, N, O, S and halogens; X and Y each represent a divalent substituent having from 0 to 10 carbon atoms and composed of constitutive element(s) selected from only C, H, N, O, S and halogens; and n, m and l each represent from 1 to 300.

7. The foaming resin composition as claimed in claim 1, wherein the organic compound for the component (A) has a molecular skeleton of the following formula: ##STR2## wherein R.sup.1 represents H or CH.sub.3 ; R.sup.10, R.sup.11 and R.sup.12 each represent a divalent substituent having from 0 to 6 carbon atoms and composed of constitutive element(s) selected from only C, H, N, O, S and halogens; X and Y each represent a divalent substituent having from 0 to 10 carbon atoms and composed of constitutive element(s) selected from only C, H, N, O, S and halogens; and n, m, l and o each represent from 1 to 300.

8. The foaming resin composition as claimed in claim 1, wherein the organic compound for the component (A) has a molecular skeleton of the following formula: ##STR3## wherein R.sup.1 represents H or CH.sub.3 ; R.sup.13 represents a divalent substituent having from 0 to 6 carbon atoms and composed of constitutive element(s) selected from only C, H, N, O, S and halogens; X and Y each represent a divalent substituent having from 0 to 10 carbon atoms and composed of constitutive element(s) selected from only C, H, N, O, S and halogens; R.sup.14 and R.sup.15 each represent a monovalent substituent having from 0 to 10 carbon atoms and composed of constitutive element(s) selected from only C, H, N, O, S and halogens; and n and m each represent from 0 to 4.

9. The foaming resin composition as claimed in any one of claims 1 to 8, wherein the component (C) comprising an OH group-having compound comprises an organic compound with an OH group as directly bonded to the carbon atom therein, and/or water.

10. The foaming resin composition as claimed in any one of claims 1 to 8, wherein the component (C) comprising an OH group-having compound comprises an alcohol and/or water.

11. A method for producing plastic foam, comprising foaming and curing a foaming resin composition as claimed in any one of claims 1 to 8, at 100.degree. C. or lower.

12. Plastic foam as produced by foaming and curing a foaming resin composition as claimed in any one of claims 1 to 8, at 100.degree. C. or lower.

13. A method for producing plastic foam by foaming in place a foaming resin composition as claimed in any one of claims 1 to 8, wherein the components (A) to (C) of the composition are mixed just before use, then directly applied onto the surface of a substrate and foamed thereon.

14. A method for producing plastic foam by foaming a foaming resin composition as claimed in any one of claims 1 to 8, wherein the components (A) to (C) of the composition are mixed just before use and foamed through injection.