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Preparation method of monodisperse polyesteramine microspheres

A polyester amine microsphere, monodisperse technology, applied in the direction of polymer adhesive additives, adhesive additives, etc., can solve the problem of poor compatibility of adhesive matrix, poor dispersion, affecting the performance of adhesives, etc. problems, to achieve the effect of simple operation, low production cost and low energy consumption

Pending Publication Date: 2022-08-02
YASUSA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these fillers are inorganic micro-nano particles such as white carbon black and calcium carbonate, which have poor compatibility with the adhesive matrix and poor dispersion, which often produce stress concentration points and affect the performance of the adhesive. Inorganic fillers for modification

Method used

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  • Preparation method of monodisperse polyesteramine microspheres
  • Preparation method of monodisperse polyesteramine microspheres
  • Preparation method of monodisperse polyesteramine microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] At room temperature, in a 30 mL glass reaction flask, 18.8 g of acetonitrile was used as the reaction solvent, and 0.9678 g of monomer TMPTA and 0.2322 g of piperazine were added, and the addition amount accounted for 6wt% of the total mass of the system. The reaction flask was sealed and shaken to make each group The mixture was evenly mixed, and the reaction flask was placed in a refrigerator storage room at 4°C for 12 hours, and then taken out. The product was subjected to suction filtration, the obtained solid was washed three times with acetonitrile solution, and dried to constant weight in a forced air drying oven at 70° C. to obtain PEA microspheres.

[0046] The yield of the obtained polyester-amine microspheres was 72.44%, and the scanning electron microscope photo of the microspheres is as follows: figure 1 As shown, the average particle size of the microspheres was thus measured to be 4.52 μm, and the particle size polydispersity coefficient was 1.011.

Embodiment 2

[0048] At room temperature, in a 30 mL glass reaction flask, 18.8 g of acetonitrile was used as the reaction solvent, 0.9398 g of TMPTA and 0.2602 g of piperazine were added, and the addition amount accounted for 6wt% of the total mass of the system, and the reaction flask was sealed and shaken to make each group The mixture was evenly mixed, and the reaction flask was placed in a refrigerator storage room at 4°C for 12 hours, and then taken out. The product was subjected to suction filtration, the obtained solid was washed three times with acetonitrile solution, and dried to constant weight in a forced air drying oven at 70° C. to obtain PEA microspheres.

[0049] The yield of the obtained polyester-amine microspheres was 69.88%, the average particle diameter of the microspheres was 4.01 μm, and the particle diameter polydispersity coefficient was 1.025.

Embodiment 3

[0051] At room temperature, in a 30 mL glass reaction flask, 18.8 g of acetonitrile was used as the reaction solvent, and 0.9678 g of monomer TMPTA and 0.2322 g of piperazine were added, and the addition amount accounted for 6wt% of the total mass of the system. The reaction flask was sealed and shaken to make each group The mixture was evenly divided, and the reaction flask was placed in a refrigerator storage room at 30° C. for 12 hours to stand for reaction, and then taken out. The product was subjected to suction filtration, the obtained solid was washed three times with acetonitrile solution, and dried to constant weight in a forced air drying oven at 70° C. to obtain PEA microspheres.

[0052] The yield of the obtained polyester-amine microspheres was 67.43%, the average particle size of the microspheres was 3.47 μm, and the particle size polydispersity coefficient was 1.046.

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Abstract

The invention discloses a preparation method of monodisperse polyesteramine microspheres, which is characterized in that polyamine and acid ester are used as reaction monomers, and aza-Michael addition precipitation polymerization is carried out in a solvent to prepare the monodisperse polyesteramine microspheres. The method is easy to operate and low in production cost and energy consumption. The method does not need any emulsifier, stabilizer or catalyst, and the surface of the obtained microsphere is clean. The surface of the microsphere contains a large number of alpha and beta unsaturated carbonyl groups, the microsphere can be subjected to grafting reaction with an adhesive containing an acrylate group under UV irradiation, and the microsphere can be directly used as a toughening filler of a UV curing adhesive without other coupling agents.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a preparation method of monodisperse polyesteramine microspheres. Background technique [0002] The solid content of solvent-based adhesives is about 30%-50%, which requires the use of a large amount of organic solvents, so the problem of environmental pollution is more prominent. The solid content of emulsion-type adhesives is about 55%. However, its water resistance is relatively poor. Although the hot melt adhesive does not use any medium, its heat resistance and solvent resistance are relatively poor, and it is prone to explosion. A new type of adhesive that does not use organic solvents and can avoid the shortcomings of ordinary emulsion adhesives, such as poor water resistance, heat resistance of hot melt adhesives, poor solvent resistance, and explosive aggregation, has become the goal pursued by the industry. UV curing adhesive is a mixture of polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C09J11/08
CPCC08G73/02C08G73/0273C09J11/08
Inventor 李树生安明星张洁陈加壹沈悦陆静崔金玉
Owner YASUSA CHEM CO LTD
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