Polyurea polymers prepared from polyamine epoxide adduct
AssigneeHehr International Inc.
InventorStuart B. Smith
Life of this patent
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Abstract
The invention features a polyamine epoxide adduct, prepared by admixing a source of epoxy group with a polyamine, and allowing the epoxy groups to react with the terminal amino groups of the polyamine so as to form the polyamine epoxy adduct. The polyamine epoxide adduct of the invention can be used as a component for preparing a polyurea polymer, thereby providing the resulting polyurea polymer with improved adhesiveness and greater chemical resistance to acidic conditions. Polyurea polymer coatings prepared from polyamine epoxide adducts demonstrate better chemical resistance and adhesion when applied to substrates than do conventionally prepared polyurea formulations.
Claims23
A method of, preparing a polyamine epoxide adduct comprising the steps of:
- a) admixing a polyamine and an epoxide under conditions in which the epoxy group is able to react with a terminal amino group;
- and
- b) allowing a terminal amino group of the polyamine to open an epoxy ring of the epoxide, thereby creating a polyamine with a terminal epoxide adduct as the polyamine epoxide adduct product, wherein the epoxide is a derivative of epichlorohydrin and Bisphenol F.
A method-of preparing a polyamine epoxide adduct, comprising the steps of:
- a) admixing a polyamine and an epoxy group under conditions in which the epoxy group is able to react with a terminal amino group;
- and
- b) allowing a terminal amino group of the polyamine to open the epoxy ring of the epoxide, thereby creating a polyamine with a terminal epoxide adduct as the polyamine epoxide adduct product, wherein the epoxide is a derivative of epichlorohydrin and an epoxy resin of phenolic novolak.
A method of preparing a polyamine epoxide adduct, comprising the steps of:
- a) admixing an aromatic polyamine and an epoxy group under conditions in which the epoxy group is able to react with a terminal amino group;
- and
- b) allowing a terminal amino group of the aromatic polyamine to open the epoxy ring of the epoxide, thereby creating a polyamine with a terminal epoxide adduct as the polyamine epoxide adduct product.
A method of preparing a polyamine epoxide adduct, comprising the steps of:
- a) admixing a polyamine and an epoxy group under conditions in which the epoxy group is able to react with a terminal amino group;
- and
- b) allowing a terminal amino group of the polyamine to open the epoxy ring of the epoxide, thereby creating a polyamine with a terminal epoxide adduct as the polyamine epoxide adduct product, wherein the polyamine is a cycloaliphatic amine.
A method of preparing a polyamine epoxide adduct,
- a) admixing polyamine and an epoxy group under conditions in which the epoxy group is able to react with a terminal amino group;
- and
- b) allowing a terminal amino group of the polyamine to open the epoxy ring of the epoxide, thereby creating a polyamine with a terminal epoxide adduct as the polyamine epoxide adduct product, wherein the polyamine is an isopherone diamine.
A method of preparing a polyamine epoxide adduct, comprising the steps of:
- a) admixing a polyamine and an epoxy group under conditions in which the epoxy group is able to react with a terminal amino group;
- and
- b) allowing a terminal amino group of the polyamine to open the epoxy ring of the epoxide, thereby creating a polyamine with a terminal epoxide adduct as the polyamine epoxide adduct product, wherein the concentration of polyamine is stoichiometrically in excess of the concentration of epoxy group.
A method of preparing a polyamine epoxide adduct, comprising the steps of:
- a) admixing a polyamine and an epoxy group under conditions in which the epoxy group is able to react with a terminal amino group;
- b) allowing a terminal amino group of the polyamine to open the epoxy ring of the epoxide, thereby creating a polyamine with a terminal epoxide adduct as the polyamine epoxide adduct product;
- c) removing residual epoxy group from the polyamine epoxide adduct product.
A method of preparing a polyurea polymer, comprising the steps of:
- (a) preparing a polyamine epoxide adduct by admixing a polyamine and an epoxide bearing an epoxy group under conditions in which the epoxy group is able to react with a terminal amino group, and allowing a terminal amino group of the polyamine to open the epoxy ring of the epoxide, thereby creating a polyamine with a terminal epoxide adduct as the polyamine epoxide adduct product;
- (b) admixing the polyamine epoxide adduct with an isocyanate;
- and
- (c) allowing the polyamine epoxide adduct to react with the isocyanate so as to form a polyurea polymer.
Dependencies are inferred from the claim text.