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Graft copolymers having excellent pigment-dispersing ability, production process of the graft copolymers, production method of emulsions and pigment dispersions

A technology of graft copolymers and polymers, applied in the direction of pigment paste, organic dyes, applications, etc., can solve the problem of the decline of physical properties of the coating

Active Publication Date: 2005-10-19
DAINICHISEIKA COLOR & CHEM MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the resin used as a protective colloid is a relatively low-molecular-weight resin with a number-average molecular weight of 5,000 to 10,000, this low-molecular-weight resin degrades the physical properties of the resulting coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0071] Next, the present invention will be described more specifically based on Synthesis Examples and Examples. However, it should be construed that the present invention is by no means limited by these examples. It should also be noted that all indications of "parts" or "parts" and "%" in the following examples are based on weight.

Synthetic example 1

[0073] Synthesis of graft copolymer 1

[0074] (1) Add diethylene glycol monobutyl ether (100 parts) and isopropanol (100 parts) to the reactor equipped with stirrer, reflux condenser, thermometer, nitrogen inlet pipe and dropping funnel, and then in a water bath Heat to 80°C. Then add the macromonomer - the macromonomer is formed by the reaction of methacrylic acid chloride and the copolymer. A monomer mixture of butyl ester and methacrylic acid formed by copolymerization using hydroxyethyl mercaptan as a chain transfer agent, the macromonomer contains carboxyl groups and has addition-polymerizable Double bond—(acid value: 228, number average molecular weight: 3,000, hereinafter abbreviated as "MM-1"; 80 parts), and the resulting mixture was stirred to dissolve the macromonomer. In a separate container mix styrene (54 parts), 2-ethylhexyl methacrylate (30 parts), hydroxyethyl methacrylate (30 parts) and methacrylic acid (6 parts) and dissolve the Azobisisobutyronitrile (AI...

Synthetic example 2～5

[0079] Synthesis of graft copolymers 4-7

[0080] While using hydroxyethyl mercaptan as a chain transfer agent, a monomer mixture composed of methyl methacrylate, cyclohexyl acrylate and methacrylic acid in a weight ratio of 50:15:35 was copolymerized to obtain a polymer. The methacrylic acid chloride is then reacted with the polymer to produce a macromonomer, which contains a carboxyl group and has an addition-polymerizable double bond at its end (acid value: 196, number average molecular weight: 3,500, hereinafter abbreviated as " MM-2").

[0081] By performing polymerization in a similar manner to Synthesis Example 1, except that the amount of macromonomer MM-1 or MM-2 and the amount of monomers reacted with the macromonomer were changed, graft copolymer 2 according to the present invention was obtained ~5. Their monomer compositions are summarized together with the physical properties of the graft copolymers. In the tables, the values ​​of macromer and monomer indicate ...

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PUM

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Abstract

A graft copolymer is formed by copolymerization of (A) a macromonomer and (B) a monomer. The macromonomer (A) is a polymer of (a) an ester monomer between an addition-polymerizable, unsaturated carboxylic acid and an aliphatic alcohol and (b) an addition-polymerizable monomer having an acidic group. The polymer contains an addition-polymerizable group at an end thereof, and has an acid value of from 100 to 300. The monomer (B) is an addition-polymerizable monomer. Units of the macromonomer (A) amount to from 20 to 50 wt.% of the whole graft copolymer, and units of the monomer (B) amount to from 50 to 80 wt.% of the whole graft copolymer.

Description

technical field [0001] The present invention relates to graft copolymers, methods for their production and their use, more particularly to grafts useful in coatings, offset printing inks, gravure inks, coating compositions, stationery inks, adhesives, etc. copolymer. Background technique [0002] Various synthesis methods for graft copolymers are known so far, and various applications for them have been found. These applications include use as pigment dispersants. For example, there are known graft copolymers (JP-A-9-241565) each having a graft chain containing a pigment-dispersing functional group, and each utilizing a macromonomer composed of an aromatic monomer and a carboxyl group-containing monomer as a Graft copolymer formed from monomers (JP-A-2002-336672). In addition, emulsions or aqueous dispersions each utilizing a water-soluble polymer such as a water-soluble resin such as a carboxyl group-containing styrene-acrylic resin as a protective colloid have been deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F263/06C08F8/44C08F290/04C08F290/12C09B67/00C09B67/46C09D7/45C09D17/00C09D155/00
CPCC09D17/001C08F290/126C08F290/046C09B67/0084C09D155/005C09D11/03C09D7/02C08F8/44C09D7/45C08F290/00C08F263/06
Inventor 嵨中博之坂井尚之小礒英之中村道卫
Owner DAINICHISEIKA COLOR & CHEM MFG CO LTD