Modified copolymerized polyester resin and water dispersion thereof

Patent metadata

Field	Value
Publication number	US-12378404-B2
Application number	US-202017426414-A
Country	US
Kind code	B2
Filing date	May 7, 2020
Priority date	May 15, 2019
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

[Problem] The present invention aims to provide a high-molecular-weight modified copolymerized polyester resin that has a reactive functional group at a site other than the terminals of the molecular chain thereof, has an excellent reactivity with a curing agent (such as an epoxy resin or an isocyanate compound), and can be used to form an organic-solvent-and-emulsifier-free water dispersion having excellent storage stability.
[Solution] A modified copolymerized polyester resin (B) having a structure in which a copolymerized polyester resin (A) has an unsaturated polyvalent carboxylic acid added to a side chain thereof, and the copolymerized polyester resin (A) contains, as copolymerization components, at least one member selected from the group consisting of: a copolymerization component having an alicyclic structure (component x); a copolymerization component having six or more continuous methylene groups (component y); and an acyclic aliphatic copolymerization component having a tertiary carbon atom and a molecular weight of more than 100 (component z).

First claim

The invention claimed is:

1. A modified copolymerized polyester resin (B) having a structure in which a copolymerized polyester resin (A) has a side chain, and the copolymerized polyester resin (A) contains, as copolymerization components, at least two members selected from the group consisting of: a copolymerization component having an alicyclic structure (component x); a copolymerization component having six or more continuous methylene groups (component y); and an acyclic aliphatic copolymerization component having a tertiary carbon atom and a molecular weight of more than 100 (component z),
wherein, the component x is at least one monomer raw material selected from the group consisting of 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 4-cyclohexene-1,2-dicarboxylic acid, 1,4-cyclohexanedimethanol, 1,3-bis(hydroxymethyl)cyclohexane, 1,4-bis(hydroxymethyl)cyclohexane, 1,4-bis(hydroxyethyl)cyclohexane, 1,4-bis(hydroxypropyl)cyclohexane, 1,4-bis(hydroxymethoxy)cyclohexane, 1,4-bis(hydroxyethoxy)cyclohexane, 2,2-bis(4-hydroxymethoxycyclohexyl) propane, 2,2-bis(4-hydroxyethoxycyclohexyl)propane, bis(4-hydroxycyclohexyl) methane, 2,2-bis(4-hydroxycyclohexyl)propane, and 3(4),8(9)-tricyclo [5.2.1.02,6]decanedimethanol, and
the side chain consists of an unsaturated polyvalent carboxylic acid.

2. The modified copolymerized polyester resin (B) according to claim 1 , wherein the unsaturated polyvalent carboxylic acid is maleic acid, itaconic acid, or an anhydride thereof.

3. The modified copolymerized polyester resin (B) according to claim 1 , wherein the copolymerized polyester resin (A) has an acid value of 200 eq/ton or less.

4. A water dispersion containing the modified copolymerized polyester resin (B) according to claim 1 .

Assignees

• Toyo Boseki
• Toyobo Mc Corp

Inventors

• Kizumoto Hirotoshi
• Kashihara Kenji
• Yamane Ryouhei

Classifications

• C08L2201/54

  Aqueous solutions or dispersions · CPC title

• C08G63/85

  Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof {(C08G63/823 takes precedence)} · CPC title

• C08G63/52 Primary

  Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation · CPC title

• C08G63/40

  Polyesters derived from ester-forming derivatives of polycarboxylic acids or of polyhydroxy compounds, other than from esters thereof · CPC title

• C08G63/199

  Acids or hydroxy compounds containing cycloaliphatic rings · CPC title