Functional segmented copolymer based on living polymerization as well as preparation method and application of copolymer

A block copolymer and living polymerization technology, applied in the direction of pigment paste, etc., can solve the problems of poor controllability of reaction, increased cost, cumbersome production process, etc., and achieve strong controllability of polarity, improved polymerization ability, Good color development of paint film

Active Publication Date: 2014-06-25
AFCONA CHEM HAIMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The structures of the above-mentioned polymers are all block copolymers, and the polar segment as the anchoring end group is a single homopolymer. Although this homopolymeric structure can improve the anchoring efficiency of the dispersant, there are two following Problem: First, if the bulk polymerization method is used, the heat generation of the polymerization will be too severe, and the controllability of the reaction will become poor. If the solvent method is used to prepare, then a strong polar solvent needs to be introduced to better dissolve the polar monomers for polymerization , after the reaction, the polar solvent needs to be removed, otherwise the block copolymer cannot adapt to some coatings and ink systems, resulting in cumbersome production process and increase

Method used

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  • Functional segmented copolymer based on living polymerization as well as preparation method and application of copolymer
  • Functional segmented copolymer based on living polymerization as well as preparation method and application of copolymer
  • Functional segmented copolymer based on living polymerization as well as preparation method and application of copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment D1

[0047] Embodiment D1 (instance of the present invention, prepared by RAFT method): 20.0 parts of propylene glycol methyl ether acetate, 6.51 parts of vinylimidazole, 14.41 parts of styrene, 0.67 parts of Part S, S'-bis-(α,α'-disubstituted methyl-α''-acetoxy) trithiocarbonate and 0.4 part of azobisisobutyronitrile, start stirring, replace nitrogen, and then heat up to 60 -65°C, keep warm for 5 hours, monitor the solid content of the system to the theoretical value, and take samples to detect the molecular weight distribution GPC (A) of the copolymerized block A. Next, add the pre-prepared mixture 6.07 parts of isobutyl methacrylate, 6.94 parts of 2-ethylhexyl acrylate, 14.61 parts of isooctyl acrylate and 0.40 parts of azobisisobutyronitrile dropwise within 2 hours, and continue to keep warm until solid up to standard. Finally, adjust the system solid content=50% discharge with propylene glycol methyl ether acetate.

[0048] The weight average molecular weight of the copolyme...

Embodiment D2

[0050] Embodiment D2 (instance of the present invention, prepared by RAFT method): 20.0 parts of propylene glycol methyl ether acetate, 10.55 parts of N,N-dimethylaminoethyl Esters, 14.02 parts of styrene, 0.95 parts of S,S'-bis-(α,α'-disubstituted methyl-α''-acetoxy) trithiocarbonate and 0.50 parts of azobisisobutyronitrile, start stirring , replace the nitrogen, then raise the temperature to 60-65°C, keep it warm for 5 hours, monitor the solid content of the system to the theoretical value, and take samples to detect the molecular weight distribution GPC (A) of the copolymerized block A. Then, within 2 hours, drop the pre-prepared mixture of 8.0 parts of methoxypolyethylene glycol methacrylate (Mw=400), 16.60 parts of isooctyl acrylate and 0.50 parts of azobisisobutyronitrile, and continue to keep warm until solid up to standard. Finally, adjust the system solid content=50% discharge with propylene glycol methyl ether acetate.

[0051] The weight-average molecular weight o...

Embodiment D3

[0053]Embodiment D3 (example of the present invention, prepared by RAFT method): drop into 14.29 parts of propylene glycol methyl ether acetate, 5.78 parts of styrene, 5.44 parts of maleic anhydride, 0.90 parts of Part S, S'-di-(α,α'-disubstituted methyl-α''-acetoxy) trithiocarbonate and 0.47 part of azobisisobutyronitrile, start stirring, replace nitrogen, and then heat up to 60 -65°C, keep warm for 5 hours, monitor the solid content of the system to the theoretical value, and take samples to detect the molecular weight distribution GPC (A) of the copolymerized block A. Next, 17.22 parts of isooctyl acrylate and 0.47 parts of azobisisobutyronitrile were added dropwise into the premix within 2 hours, and the temperature was continued until the solid content reached the standard. Lower the temperature to 80°C, put in 15.71 parts of Jeffamine M-1000 (Huntsman Company) and 4.29 parts of 2-aminomethylpyridine, heat up to 180°C for dehydration and keep the acid value below 1, and f...

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Abstract

The invention relates to a functional segmented copolymer based on living polymerization. The functional segmented copolymer has a structural formula as shown in the specification, wherein a segment A is prepared by polymerizing at least two olefinic bond unsaturated monomer segments; A1 is a polar olefinic bond unsaturated monomer with an amino functional group, an acid functional group or methacrylic acid glycidyl ester; A2 is a copolymerization prompting monomer; a segment B is prepared by polymerizing at least one or more than one olefinic bond unsaturated monomers; x, y and z are the polymerization degrees; z ranges from 0 to 400; the number-average molecular weight of the segment A is 500-50000; the number-average molecular weight of the segment B is 1000-20000. By introducing the copolymerization prompting monomer A2, the defects in preparing the conventional segmented active copolymer are avoided, not only can the functional segmented copolymer prepared in an ordinary solvent, but also the compatibility of a dispersing agent and a substrate of the functional segmented copolymer is greatly improved, and the functional segmented copolymer is good in dispersion effect for carbon black, organic dye and the like, low in color paste velocity, good in paint film color showing, and particularly high in blackness of the carbon black.

Description

technical field [0001] The invention relates to a functional polymer based on active polymerization, which is an AB block copolymer prepared by active polymerization and used for dispersion of carbon black, organic pigments and the like. Background technique [0002] The dispersant is a surfactant polymer, and part of its structure has a more polar anchoring end group, which is easily adsorbed on the surface of the pigment, and the other part is a solvated long molecular chain with a lower polarity, which is compatible with the dispersed phase ( Resin and solvent) have better affinity. Therefore, the dispersant can uniformly disperse solid particles of inorganic and organic pigments that are difficult to dissolve in liquid, and at the same time prevent the sedimentation and aggregation of solid particles to form a stable suspension. [0003] With the widespread use of organic pigments and carbon black in coatings, inks and plastics, high molecular weight dispersants have be...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F212/08C08F212/14C08F212/12C09D17/00
Inventor 王志军
Owner AFCONA CHEM HAIMEN
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