US 2025/0043065 A1 · NEW ALIPHATIC POLYAMINES FOR USE AS CURING AGENT FOR EPOXY RESINS

Abstract

Aliphatic polyamines with methyl substituents are used in the curing of epoxy resins. The preparation of such aliphatic polyamines is described. Corresponding epoxy resin compositions include an epoxy resin and the aliphatic polyamines as curing agents. These curing agents combine comparably rapid curing at moderately elevated temperatures with comparably long pot life at room temperature. At the same time, they allow for cured epoxy resins with good mechanical properties and high glass transition temperature.

Claims13

Dependent claims

An aliphatic polyamine of the formula I,

H2N(-Q-NH)n-A-NH-Q-NH2 (I),
wherein n is 0 or 1,
A is —CH2—CH(CH3)—CH2—, —CH2—CH2—CH(CH3)—, or —CH(CH3)—CH2—CH2—, and
each Q is independently —CH(CH3)—CH2—or —CH2—CH(CH3)—.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

18/713,905Filed 21 Nov 2022

Priority

EP 21211116.529 Nov 2021

Published

6 Feb 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

C08G 59/5006
Amines: aliphatic
C07C 209/52
By reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines…:…
C07C 211/14
Of an acyclic saturated carbon skeleton: amines containing amino groups bound to at least two aminoalkyl groups, e.g. diethylenetriamines
C07D 243/08
Having the nitrogen atoms in positions 1 and 4: not condensed with other rings

New aliphatic polyamines for use as curing agent for epoxy resins

Life of this patent

New aliphatic polyamines for use as curing agent for epoxy resins

Life of this patent

Abstract

Claims13