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Alkali-soluble emulsion, preparation method thereof and application thereof in water-based ink

An alkali-soluble emulsion and water-based ink technology, applied in applications, inks, household appliances, etc., can solve the problems of n-amyl alcohol residue, reaction instability, accelerated reaction rate, etc., to achieve improved stability, excellent stability, and performance excellent effect

Active Publication Date: 2012-06-13
GUANGDONG YINGKE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solution polymerization uses a large amount of expensive solvents, which is not only costly, but also causes serious environmental problems
[0003] Based on the above defects, USP4410673 synthesized a medium-low molecular weight alkali-soluble copolymer with water as solvent and n-pentanol as co-solvent. Although this method is better than solution polymerization, n-pentanol needs to be distilled and recovered in the later stage, and the process is complicated and The investment is large, and there may be a small amount of n-amyl alcohol remaining in the copolymer; for this, USP4628071 adopts the method of emulsion polymerization, first pre-dosing part of the acrylic acid monomer and chain transfer agent, and then adding other mixed components dropwise at a slower rate. part, to synthesize an alkali-soluble emulsion with medium and low molecular weight, but if methacrylic acid is used instead of acrylic acid in this method, the effect is not very satisfactory; 6% of the total amount) chain transfer agent is synthesized with medium and low molecular weight alkali-soluble emulsion, but the excessive amount of chain transfer agent not only increases the cost, but also accelerates the reaction rate, which may cause the instability of the reaction, and replace it with acrylic acid Methacrylic acid does not work well

Method used

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  • Alkali-soluble emulsion, preparation method thereof and application thereof in water-based ink
  • Alkali-soluble emulsion, preparation method thereof and application thereof in water-based ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. In a round-bottomed flask with stirring (stirring turned on, 300-500 rpm), add 120 grams of deionized water, 18 grams of sodium alkylphenol polyoxyethylene ether sulfate (50%, Clariant), 9 Gram octylphenol polyoxyethylene ether (~100%, Dow), stirred for 5 minutes, then added 80 grams of styrene, 250 grams of ethyl acrylate, 80 grams of methacrylic acid, 10 grams of N- Methylolacrylamide (48%), 5 gram hydroxyethyl acrylate, 10 gram isooctyl mercaptoacetate, make pre-emulsion;

[0036] 2. Dissolve 5 grams of ammonium persulfate with 100 grams of deionized water to prepare an initiator solution;

[0037] 3. In a 2-liter four-necked round-bottom flask with paddle stirrer, thermocouple and condenser, add 2 grams of sodium bicarbonate, 2 grams of alkylphenol polyoxyethylene ether sodium sulfate (50%, Clariant), 1 gram of octylphenol polyoxyethylene ether (~100%, Dow), 318 grams of deionized water, stir and heat up to about 60°C, add 10% pre-emulsion and 20% initiator solu...

Embodiment 2

[0040] Embodiment 2 The process is the same as that of Embodiment 1, only need to change 80 grams of methacrylic acid into 40 grams of methacrylic acid and 40 grams of acrylic acid to obtain alkali-soluble emulsion B, the pH value is 4.3, and the solid content is 43%.

Embodiment 3

[0042] Embodiment 3 The process is the same as that of Embodiment 1, except that 80 grams of methacrylic acid is changed to 80 grams of acrylic acid to obtain an alkali-soluble emulsion C with a pH value of 4.0 and a solid content of 43%.

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Abstract

The invention discloses alkali-soluble emulsion, a preparation method thereof and application thereof in water-based ink. The specific raw materials and weight percents thereof in the emulsion are as follows: 8-10 percent of hard monomer, 20-30 percent of soft monomer, 1-2 percent of functional monomer, 8-10 percent of unsaturated carboxylic monomer, 1-3 percent of chain transfer agent, 2-3 percent of emulsifier, 0.4-0.5 percent of initiator, 0.1-0.4 percent of buffer, and the rest being deionized water. The invention has the advantages of low cost, economical and practical emulsion and excellent performance. When in use in the water-based ink, the invention can effectively improve the stability and wear resistance of the water-based ink, and can also be used for grinding. After being ground into color paste along with toner, the emulsion can not be thickened and has excellent stability.

Description

technical field [0001] The invention relates to an alkali-soluble emulsion, a preparation method thereof, and an application of the alkali-soluble emulsion in ink. Background technique [0002] Alkali-soluble copolymers with medium and low molecular weight are often used in inks, floor finishes, paper coatings, adhesives and other fields, especially in inks, with excellent stability and good transferability. The copolymer is generally composed of water-soluble monomers and water-insoluble monomers, and is often synthesized by solution polymerization. However, solution polymerization uses a large amount of expensive solvents, which is not only costly, but also causes serious environmental problems. [0003] Based on the above defects, USP4410673 synthesized a medium-low molecular weight alkali-soluble copolymer with water as solvent and n-pentanol as co-solvent. Although this method is better than solution polymerization, n-pentanol needs to be distilled and recovered in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/06C08F220/58C08F220/28C08F2/38C08F2/24C09D11/10C09D11/107
Inventor 连坤鹏赵英华朱力勇刘润林
Owner GUANGDONG YINGKE GRP CO LTD