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A kind of preparation method of oil-soluble hyperdispersant based on block copolymer

A technology of block copolymers and hyperdispersants, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve the problems of irregular molecular structure of dispersants and further improvement of dispersion ability, and achieve strong dispersion efficiency and stability, good application prospects, and excellent compatibility

Active Publication Date: 2020-10-02
盱眙县天宝立聚合物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It is to provide an oil-soluble hyperdispersant based on block copolymers to solve the problems of irregular molecular structure and dispersing ability of traditional dispersants, etc.

Method used

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  • A kind of preparation method of oil-soluble hyperdispersant based on block copolymer
  • A kind of preparation method of oil-soluble hyperdispersant based on block copolymer
  • A kind of preparation method of oil-soluble hyperdispersant based on block copolymer

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Effect test

Embodiment 1

[0027] (1) Under normal temperature conditions, add 50.0g (0.50mol) of methyl methacrylate, 2.79g (0.01mmol) of 4-cyanodithiobenzoylvaleric acid and refined azobisisobutyl Nitrile 0.492g (0.003mmol), then add 50mL of anhydrous toluene to dissolve, seal, freeze with liquid nitrogen, vacuumize, feed high-purity nitrogen, after repeating this operation 3 times, put the reaction bottle in a constant temperature oil bath at 60°C Stir and heat for 10h. After the reaction, the reaction flask was exposed to air cooling to terminate the reaction, the product was dissolved in a small amount of tetrahydrofuran, and then the polymer solution was slowly added dropwise to a large amount of cold methanol to remove unreacted monomers, and a light yellow precipitate was produced. The obtained pale yellow solid is vacuum-dried to constant weight at room temperature to obtain polymethyl methacrylate macromolecular chain transfer agent by suction filtration. Wherein, the weighing method records ...

Embodiment 2

[0032] (1) Under normal temperature conditions, add 56.9g (0.40mol) of n-butyl methacrylate, 2.79g (0.01mmol) of 4-cyanodithiobenzoylvaleric acid and refined azobisiso Add 0.492g (0.003mmol) of butyronitrile, then add 60mL of anisole to dissolve, seal, freeze with liquid nitrogen, evacuate, and feed high-purity nitrogen. After repeating this operation for 3 times, place the reaction bottle in a constant temperature oil bath at 70°C Stir and heat in medium for 6h. After the reaction, the reaction flask was exposed to air cooling to terminate the reaction. The product was dissolved in a small amount of tetrahydrofuran, and then the polymer solution was slowly added dropwise to a large amount of cold methanol to remove unreacted monomers. A light yellow precipitate was produced. The light yellow solid was obtained by filtration, and vacuum-dried to constant weight at room temperature to obtain poly-n-butyl methacrylate macromolecular chain transfer agent. Wherein, the weighing m...

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Abstract

The present invention provides a kind of preparation method of oil-soluble hyperdispersant, first synthesize poly(methacrylate-b-(styrene-co-p-chloromethylstyrene)) oil by reversible addition-fragmentation chain transfer polymerization Soluble block copolymer, and then through the nucleophilic substitution reaction with the methylene chloride in the polymer, the block copolymer grafted polyamine compound hyperdispersant is prepared; the copolymer backbone has excellent properties in various resins Compatibility, at the same time, polyamine compounds with affinity appear repeatedly in the polystyrene segment, and can be closely combined with the surface of inorganic or organic particles to play a good anchoring role; the polymerization method of the present invention can realize good polymerization of monomers control, the polymer structure is regular, and the grafting rate is adjustable. The prepared hyperdispersant can meet the dispersion requirements of ultrafine particles in organic systems, and has a good application prospect.

Description

technical field [0001] The invention relates to the field of macromolecular materials, in particular to a preparation method of an oil-soluble hyperdispersant based on a block copolymer, which can be used to disperse superfine particles in filling plastics, coatings and inks. Background technique [0002] In the fields of filled plastics, coatings, inks, etc., ultrafine inorganic or organic fillers are usually added to improve product performance or pigment particles are added for product coloring. However, the large specific surface area and special surface state often lead to ultrafine Fine particles cannot be stably dispersed and tend to agglomerate during use, which ultimately affects the quality and performance of the product. Therefore, how to achieve long-term stable dispersion of ultrafine particles in the medium is an urgent problem to be solved in practical applications, and has important practical significance [0003] Therefore, in recent years, a polymerized hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F220/14C08F220/18C08F212/08C08F212/14C08F8/32B01F17/52C09D7/65C08L23/12C08L53/00C08K3/22C09K23/52
CPCC09D7/65C08F8/32C08F212/08C08F212/14C08F220/14C08F220/18C08F293/005C08L23/12C08F2438/03C08K2003/2241C08K2201/011C08F220/1804C09K23/16
Inventor 张源源张广路俞杨武惠婷朱肇树
Owner 盱眙县天宝立聚合物有限公司
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