US 12,187,665 B2 · Crosslinking component for binder resins

Abstract

This invention relates to a crosslinking component for binder resins which is especially suitable to be used together with epoxy-group containing binders and/or (poly)isocyanates such as blocked (poly)isocyanates and which comprises at least two blocked isocyanate groups per molecule of the crosslinking component whereby at least one of the at least two blocked isocyanate groups is a group according to structural unit (I), wherein the ratio of structural units of formula (II), if present, to structural units of formula (I) is 0.40 or below. The cross-linking component may also be self-cross-linkable. The present invention further relates to a coating composition, e.g. a one-component coating composition comprising the crosslinking component and a method of its manufacture.

Claims7

Dependent claims

A coating composition comprising a crosslinking component comprising at least two blocked isocyanate groups per molecule of the crosslinking component whereby at least one of the at least two blocked isocyanate groups is a group according to the following structural unit (I)

with
R1 being a C2 to C10 hydrocarbyl group,
wherein
the ratio of structural units of the following formula (II), if present,
to structural units of formula (I) is 0.20 or below;
and
a binder resin comprising epoxy groups, alpha-beta-unsaturated ester groups, (blocked) isocyanates, keto groups, aldehyde groups or mixtures thereof;
where the structural unit (I) forms a free amine by generating a C—C double bond containing compound originating from R1 and CO2 during reaction with the resin.

5 more elements

Dependencies are inferred from the claim text.

Crosslinking component for binder resins

Life of this patent

Crosslinking component for binder resins

Life of this patent

Abstract

Claims7