JPS59117538A - Crosslinked carboxyl-containing polymer particle non-aqueous dispersion composition - Google Patents

Abstract

PURPOSE:To provide the titled composition having excellent dispersion stability, by adding a long-chain amine to a dispersion composition composed of a hydrophobic organic solvent, a surface active agent, particles of crosslinked carboxyl- containing polymer, etc. CONSTITUTION:The objective composition is prepared by adding (A) a 8-20C long-chain amine preferably stearylamine, laurylamine, etc. to (B) a dispersion composition composed of a hydrophobic organic solvent such as mineral spirit, a surface active agent such as polyoxyethylene alkyl ether, etc. and particles of partially neutralized crosslinked carboxyl-containing polymer such as crosslinked polyacrylic acid ammonium salt, etc. The amount of the component (A) is 0.05- 20mol% based on the component (B). USE:Pasty printing ink, polish and cleaner for automobile, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a non-aqueous dispersion composition of crosslinked carboxyl-containing polymer particles useful as a water thickener etc. that can thicken water at low concentrations to form a heavy mucilage. It is.

As is well known, crosslinked copolymers obtained from carboxyl-containing monomers such as acrylic acid, methacrylic acid, maleic acid, or their acid anhydrides, or from vinyl monomers copolymerizable with these monomers, find numerous applications. It is used in

Usually, these polymers are often used in powder or solid form, but since these polymers are effective water thickeners, they are also very often used in the form of aqueous solutions. However, when these powdered or solid polymers are dissolved in water, they may not dissolve quickly because the water solubility of the polymer is not good, or they may form lumps on contact with water and may not dissolve uniformly. Since it takes a long time to dissolve in the liquid, this often poses a problem in practice. Therefore, it is desirable to improve the water solubility of these polymers.

As a means to improve the water solubility of these polymers, it is effective to disperse a dispersion composition obtained by dispersing these polymers in a mixture of a hydrophobic organic solvent and a surfactant, and then dissolve the resulting dispersion composition in water. This method can solve the above-mentioned problem of water solubility. however,
In this case, because the dispersion stability of the dispersion composition consisting of a hydrophobic organic solvent, a surfactant, and crosslinked carboxyl-containing polymer particles is not good, precipitation of the polymer particles in the dispersion composition or hard cake of the dispersion composition may occur. There are problems such as compatibility.

Therefore, the present inventors attempted various studies aimed at stabilizing the dispersion of polymer particles in a dispersion system consisting of a hydrophobic organic solvent, a surfactant, and crosslinked carboxyl-containing polymer particles, and as a result, they found that the dispersion system described above has a long history. By incorporating chain amines, crosslinked carboxyl-containing polymers with good dispersion stability can be easily produced with a low or medium speed stirring device without using special equipment such as a homogenizer or a high shear mixer such as a colloid mill. The inventors completed the present invention by discovering that a particle-dispersed composition can be obtained and that the obtained dispersion composition dissolves rapidly in water.

The crosslinked carboxyl-containing polymer in the present invention includes various crosslinked polymers obtained from carboxyl-containing monomers such as acrylic acid, methacrylic acid, maleic acid, or acid anhydrides thereof, or vinyl monomers copolymerizable with these monomers. A variety of crosslinked copolymers are used. For example, Japanese Patent Publication No. 45-27830,
JP-A-53-42285, JP-A-54-1457
Examples include various crosslinked carboxyl-containing polymers, partially neutralized products thereof, and mixtures thereof described in Japanese Patent No. 88.

As the surfactant and hydrophobic organic solvent in the present invention, various well-known surfactants and hydrophobic organic solvents can be used. For example, surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene polyoxypropylene glycol, glycerin fatty acid partial ester, sorbitan fat m
Partial ester, pentaerythritol fatty acid partial ester, propylene glycol monofatty acid ester, sucrose fatty acid partial ester, polyoxyethylene sorbitan fatty acid partial ester, polyoxyethylene glycerin fatty acid partial ester, polyethylene glycol fatty acid ester, polyoxyethylene, castor oil, fatty acid gel Nonionic surfactants such as tanolamide and triethanolamine fatty acid esters or aliphatic monocarboxylate salts,
Anionic surfactants such as abietates, dialkyl sulfosuccinates, alkylbenzene sulfonates, alkyl sulfate salts, alkyl phosphate salts, alkyl amine salts, tetraalkylammonium salts,
Cationic surfactants such as polyethylene polyamide salts or N,N'-dimethyl-N-alkyl-N-carboxyalkylene ammonium betaine, N,N-dialkylaminoalkylene carboxylate, 2-alkyl-
Ampholytic surfactants such as 5-1-hydroxyethyl-1-carboxymethylimidazolinium salt are used.

Examples of hydrophobic organic solvents include soybean oil, cottonseed oil, rapeseed oil, castor oil, linseed oil, benzene, toluene, xylene, mineral oil, kerosene, mineral spirit, naphtha, ink solvents, hexane, higher alcohols (octyl alcohol, lauryl alcohol) etc. are used.

In the present invention, the long-chain amine has a primary amine in its molecule.
, 21 and 21, and has an alkyl carbon number of 8 to 20. For example, octylamine, laurylamine, stearylamine, oleylamine, myristylamine, palmitylamine, dodecylamine, coconutamine, distearylamine, didodecylamine, dimethyloctylamine, dimethyldodecylamine, dimethyloctylamine, dimethylpalmitylamine and mixtures thereof.

6- Also, the amount of these long-chain amines added is preferably 0.05 mo1% to 20 mo/% with respect to the crosslinked carboxyl-containing polymer; if the amount added is less than this, the dispersion stabilizing effect will be long, and if the amount added is more than this, the dispersion obtained will be poor. Fluidization of the composition becomes extremely poor, resulting in poor workability during use.

The present invention will be explained in detail below. In the examples, unless otherwise specified, component amounts are expressed in parts by weight or % by weight.

Example 1 30 parts of mineral spit, 20 parts of polyoxyethylene nonylphenol ether (HLB=5.6), 20 parts of sorbitan monooleate (HLB=4.3), and 2 parts of stearylamine were placed in a Separate full flask and uniformly dissolved. to make a dispersion medium. Next, the stirring speed is 1100 rpm.
Cross-linked ammonium polyacrylate (degree of neutralization 0.2)
25 parts of the powder was poured into the above dispersion medium from the upper part of the Separaflu flask and stirred for 1 hour to obtain a paste-like dispersion composition with good fluidity.

Example 2 A dispersion composition of the present invention was obtained in exactly the same manner as in Example 1 except that laurylamine was used in place of stearylamine.

Example 3 A dispersion composition of the present invention was obtained in exactly the same manner as in Example 1 except that oleylamine was used in place of stearylamine.

Comparative Example A dispersion composition was obtained in exactly the same manner as in Example 1, except that no long-chain amine was used.

Next, the dispersion compositions obtained in Example 1.2.3 and Comparative Example above were left at 50°C, and the viscosity of the dispersion compositions was measured at regular intervals to compare the stability of each dispersion composition. did. The results are shown in the table below.

The viscosity was measured using a BL type viscometer rotor A4 at a rotation speed of 3.
The measurement was carried out under the conditions of Q rpm and measurement temperature of 25°C.

From the above table, it is clear that the dispersion composition of the present invention is excellent in dispersion stability.

Therefore, the dispersion composition of the present invention can be used as a pasty printing ink (
It can be advantageously used as a raw material for producing products such as printing pastes), automotive polishes and cleaners, household polishes and cleaners, and cosmetics (eg, hair creams, paste cosmetics), etc.

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Claims (3)

[Claims] (1) Long-chain amine 1. A non-aqueous dispersion composition of crosslinked carboxyl-containing polymer particles, characterized by containing the following. (2) The non-aqueous dispersion composition of crosslinked carboxyl-containing polymer particles according to claim 1, wherein the long-chain amine has alkyl carbon atoms of 8 to 20. (3) The non-aqueous dispersion composition of crosslinked carboxyl-containing polymer particles according to claim 1, wherein the content of long-chain amines is 0.05 to 20 mo1% based on the crosslinked carboxyl-containing polymer.