Method of Stabilizing Resorcinol Resins and Gel Compositions Made Therefrom
First Claim
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1. A method of stabilizing a resorcinol-aldehyde resin, comprising:
- heating a resorcinol-aldehyde resin in the substantial absence of an acid or base catalyst at a temperature from about 130°
C. to about 180°
C. for a sufficient amount of time to render the resorcinol-aldehyde resin stable in an aqueous solution, wherein the resorcinol-aldehyde resin prior to the heating is a novolak resin.
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Abstract
A method of stabilizing a resorcinol-aldehyde resin comprises heating a resorcinol-aldehyde resin in the substantial absence of an acid or base catalyst at a temperature from about 130° C. to about 180° C. for a sufficient amount of time to render the resin stable in an aqueous solution, wherein the resorcinol-aldehyde resin prior to heating is a novolak resin. The stabilized resins have many useful applications. For example, they can be used to make aerogels and xerogels. They also can be used to make dipping solutions to improve the adhesion between rubber and tire cords in a tire, belt, or hose.
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Citations
25 Claims
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1. A method of stabilizing a resorcinol-aldehyde resin, comprising:
- heating a resorcinol-aldehyde resin in the substantial absence of an acid or base catalyst at a temperature from about 130°
C. to about 180°
C. for a sufficient amount of time to render the resorcinol-aldehyde resin stable in an aqueous solution, wherein the resorcinol-aldehyde resin prior to the heating is a novolak resin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- heating a resorcinol-aldehyde resin in the substantial absence of an acid or base catalyst at a temperature from about 130°
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14. A stabilized resorcinol-aldehyde aqueous solution obtainable by a method comprising heating a resorcinol-aldehyde resin in the substantial absence of an acid or base catalyst at a temperature from about 130°
- C. to about 180°
C. for a sufficient amount of time to render the resorcinol-aldehyde resin stable in an aqueous solution, wherein the resorcinol-aldehyde resin prior to the heating is a novolak resin. - View Dependent Claims (15, 16)
- C. to about 180°
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17. A gel obtainable from a stabilized resorcinol-aldehyde aqueous solution, wherein the stabilized resorcinol-aldehyde aqueous solution is obtainable by a method comprising heating a resorcinol-aldehyde resin in the substantial absence of an acid or base catalyst at a temperature from about 130°
- C. to about 180°
C. for a sufficient amount of time to render the resorcinol-aldehyde resin stable in an aqueous solution, wherein the resorcinol-aldehyde resin prior to the heating is a novolak resin. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
- C. to about 180°
Specification