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Block type polymer dispersant and preparation method thereof

A block type polymer and block polymer technology, which is applied in the treatment of dyed polymer organic compounds, chemical instruments and methods, fibrous fillers, etc., can solve the properties of poor stability, paint film appearance, hardness and aging resistance. Adverse effects, etc., to prevent pigment flocculation and precipitation, shorten grinding time, and improve color strength

Inactive Publication Date: 2012-11-14
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using traditional small molecule dispersants, the stability of the system is poor, and it also has adverse effects on the appearance, hardness and aging resistance of the paint film.

Method used

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  • Block type polymer dispersant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At 25°C, add methyl methacrylate (50.06g, 0.5mol), butyl acrylate (64.08g, 0.5mol), methyl 2-bromopropionate (1.67g, 0.01mol), five Methyldialkylenetriamine (0.3466 g, 0.002 mol), ethanol (130 g), mechanically stirred at 250 rpm, and after passing high-purity nitrogen for 30 minutes, added 0.4 g of 0.5 mm copper wire. After 4 hours, dimethylaminoethyl acrylate (16.04 g, 0.012 mol) was added, and after 2 hours, the stirring was stopped, and the copper wire was separated by filtration. Obtain poly(methyl methacrylate-co-butyl acrylate-b-dimethylaminoethyl acrylate) block polymer as shown in formula (I), wherein m=100, n=12, monomer conversion The rate is 98%, and the solid content is 50%.

Embodiment 2

[0020] At 25°C, add methyl methacrylate (40.05 g, 0.4 mol), butyl acrylate (51.26 g, 0.4 mol), methyl 2-bromopropionate (1.67 g, 0.01 mol), five Methyldialkylenetriamine (0.692g, 0.004mol), ethanol (70g), mechanically stirred at 250 rpm, high-purity nitrogen gas was passed for 30min, and then 0.5g of copper powder with a particle size of 0.5mm was added. After 4 hours, dimethylaminoethyl acrylate (13.37 g, 0.01 mol) was added, and after 2 hours, the stirring was stopped, and the copper wire was separated by filtration. Obtain poly(methyl methacrylate-co-butyl acrylate-b-dimethylaminoethyl acrylate) block polymer as shown in formula (I), wherein m=80, n=10, monomer conversion The rate is 99%, and the solid content is 60%.

Embodiment 3

[0022] At 25°C, add dimethylaminoethyl acrylate (16.04g, 0.012mol), tribromomethane (2.53g, 0.01mol), and tris(2-aminoethyl)amine (0.46g, 0.002mol) into a 500ml four-neck flask , ethanol (106g), mechanically stirred at 250 rpm, and after passing high-purity nitrogen for 30 minutes, add 0.4g of 0.5 mm copper wire. After 2 hours, methyl methacrylate (50.06 g, 0.5 mol) and butyl acrylate (64.08 g, 0.5 mol) were added, and after 4 hours, the stirring was stopped, and the copper wire was separated by filtration. Obtain poly(dimethylaminoethyl acrylate-b-methyl methacrylate-co-butyl acrylate) block polymer, wherein m=100, n=12, monomer conversion rate 97%, solid content 55% .

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Abstract

The invention discloses a block polymer dispersant and a preparation method thereof. The structure of the block polymer dispersant is shown in the following formula (I). The invention also discloses a synthesis method for preparing the block type polymer dispersant by single electron transfer / living radical polymerization. The invention has the following advantages: 1) the block type polymer dispersant prepared by the single electron transfer / living radical polymerization is light in color and nearly colorless, can be directly for use, and has a simple synthesis process; 2) the block type polymer dispersant can quickly humidify the pigment particles and shorten the milling time; 3) the steric effect of the polyitaconate deflocculates the pigment particles, and can prevent the pigment fromflocculating and precipitating in the storage process; and 4) the deflocculated pigment particles are small, thereby achieving high glaze and color intensity, and increasing transparency and hiding power.

Description

technical field [0001] The invention relates to a novel pigment polymer dispersant, and also relates to a preparation method of the dispersant. Background technique [0002] In coatings, inks and other industries, the dispersion of pigments is an important part of manufacturing technology. Pigments form solid-liquid dispersions in paints and inks. The dispersion system is thermodynamically unstable, and aggregation may occur during paint making, storage, construction and application, and even film formation. In order to obtain a uniform and stable dispersion, it is often necessary to use a dispersant. When using traditional small molecule dispersants, the stability of the system is poor, and it also has adverse effects on the appearance, hardness and aging resistance of the paint film. In recent years, polymer dispersants have become a new generation of high-efficiency dispersants, which have a significant effect on the dispersion of pigments, especially on wettability and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/52B01F17/36B01F17/16C08F297/06C09C3/10C09C1/00C09C1/56C09B67/20C09K23/52C09K23/16C09K23/36
CPCC08F293/005C08F2438/01
Inventor 张方志
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI