Grafting of functional compounds onto functional oxymethylene polymer backbones, with diisocyanate coupling agents, and the graft polymers thereof
AssigneeHoechst Celanese Corporation
InventorsAndrew B. Auerbach, Jerry A. Broussard, Nan L. Yang, James L. Paul
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Abstract
Novel oxymethylene graft polymers are obtained by grafting a functional compound (i.e., a polymer or compound having one or two hydroxyl, carboxyl, or amine functional groups) onto an oxymethylene backbone having pendant hydroxyl groups which serve as reactive sites for the graft reaction with diisocyanate coupling agents.
Claims14
An oxymethylene graft polymer comprising:
- (i) a polyoxymethylene backbone having pendant hydroxyl functional groups which is of the following general formula:
- ##STR8## where R is a C1-C6 alkyl group, and m and n are integers such that m+n is between 5 and 20,000 and the ratio of units of subscript m to the units of subscript n is between 1:1 and 1000:1,
- (ii) a monofunctional or difunctional compound in which the functional groups are hydroxyl, amine, or carboxylic acid groups,
- (iii) a diisocyanate coupling agent, and
- (iv) optionally, a monofunctional endcapping agent in which the functional group is a hydroxyl, an amine, or a carboxylic acid group.
An oxymethylene graft polymer comprising:
- (i) a polyoxymethylene backbone having pendant hydroxyl functional groups of the following general formula:
- ##STR9## where m, n, and p are integers such that m+n+p is between 5 and 20,000 and the ratio of units of subscript m to the units of subscript n+p is between 1:1 and 1000:1,
- (ii) a monofunctional or difunctional compound in which the functional groups are hydroxyl, amine, or carboxylic acid groups,
- (iii) a diisocyanate coupling agent, and
- (iv) optionally, a monofunctional endcapping agent in which the functional group is a hydroxyl, an amine, or a carboxylic acid group.
An oxymethylene graft polymer comprising:
- (i) a polyoxymethylene backbone having pendant hydroxyl functional groups of the following general formula:
- ##STR10## where q is an integer between 1 and 4 and m and n are integers such that m+n is between 5 and and 20,000 and the ratio of units of subscript m to the units of subscript n+p is between 1:1 and 1000:1,
- (ii) a monofunctional or difunctional compound in which the functional groups are hydroxyl, amine, or carboxylic acid groups,
- (iii) a diisocyanate coupling agent, and
- (iv) optionally, a monofunctional endcapping agent in which the functional group is a hydroxyl, an amine, or a carboxylic acid group.
A method of making an oxymethylene graft polymer comprising grafting a monofunctional or difunctional compound or polymer onto pendant hydroxyl functional reactive sites of a polyoxymethylene backbone with diisocyanate coupling agents and, optionally, with monofunctional endcapping agents, in which the functional groups are hydroxyl, amine, or carboxylic acid groups, and wherein the polyoxymethylene backbone is of the general formula:
- ##STR11## where R is a C1-C6 alkyl group, and m and n are integers such that m+n is between 5 and 20,000 and the ratio of units of subscript m to the units of subscript n is between 1:1 and 1000:1.
A method of making an oxymethylene graft polymer comprising grafting a monofunctional or difunctional compound or polymer onto pendant hydroxyl functional reactive sites of a polyoxymethylene backbone with diisocyanate coupling agents and, optionally, with monofunctional endcapping agents, in which the functional groups are hydroxyl, amine, or carboxylic acid groups, and wherein the polyoxymethylene backbone is of the general formula:
- ##STR12## where m, n, and p are integers such that m+n+p is between 5 and 20,000 and the ratio of units of subscripts m to the units of subscript n+p is between 1:1 and 1000:1.
A method of making an oxymethylene graft polymer comprising grafting a monofunctional or difunctional compound or polymer onto pendant hydroxyl functional reactive sites of a polyoxymethylene backbone with diisocyanate coupling agents and, optionally, with monofunctional endcapping agents, in which the functional groups are hydroxyl, amine, or carboxylic acid groups, and wherein the polyoxymethylene backbone is of the general formula:
- ##STR13## where q is an integer between 1 and 4, and m and n are integers such that m+n is between 5 and 20,000 and the ratio of units of subscript m to the units of subscript n is between 1:1 and 1000:1.
Dependencies are inferred from the claim text.