US 2024/0270940 A1 · POLYOXAZOLINE BASED THERMAL LATENT CURING AGENTS FOR THERMOSET RESINS

Abstract

A thermal latent curing agent including one or more polyoxazoline based polymers and one or more curing agents is provided. The curing agents are: (i) physically entrapped in a matrix of the polyoxazoline based polymer, and/or (ii) covalently bonded to the polyoxazoline based polymer irreversibly as a side and/or terminal group, and/or (iii) covalently bonded to the polyoxazoline based polymer reversibly. Methods for preparation of the thermal latent curing agents are provided. “One component” mixtures that include a thermoset matrix resin and one or more of such thermal latent curing agents and different uses of the mixtures are also provided.

Claims20

Dependent claims

A thermal latent curing agent comprising one or more polyoxazoline based polymers and one or more curing agents, wherein the curing agents are:

(i) physically entrapped in a matrix of the polyoxazoline based polymer, and/or (ii) covalently bonded to the polyoxazoline based polymer irreversibly as a side and/or terminal group, and/or
(iii) covalently bonded to the polyoxazoline based polymer reversibly.

A method for preparation of a thermal latent curing agent, wherein the method comprises one or a combination of the following steps:

a. preparation of a solution which includes one or more polyoxazoline based polymers, one or more curing agents, and one or more solvents, then evaporating of said one or more solvents for obtaining a polyoxazoline matrix in which the one or more curing agents are physically entrapped;
b. preparation of a matrix of one or more polyoxazoline based polymers, in which one or more curing agents are covalently bonded to the polyoxazoline based polymer irreversibly;
or
c. preparation of a matrix of one or more polyoxazoline based polymers, in which one or more curing agents are covalently bonded to the polyoxazoline based polymer reversibly.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

18/681,054Filed 12 Nov 2021

Published

15 Aug 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

C08G 73/0233
Polyamines: polyamines derived from oxazolines, oxazines or having pendant acyl groups
C08K 9/04
Use of pretreated ingredients: ingredients treated with organic substances
C08G 59/188
Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react…:…
C08G 59/5073
Containing only nitrogen as a heteroatom: having two nitrogen atoms in the ring

Polyoxazoline based thermal latent curing agents for thermoset resins

Life of this patent

Polyoxazoline based thermal latent curing agents for thermoset resins

Life of this patent

Abstract

Claims20