A kind of preparation method of amino-modified acrylic resin composite microsphere

A technology of acrylic resin and composite microspheres, which is applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of no literature, reports, etc., and achieve the effects of good spherical regularity, increased opacity, and improved haze

Active Publication Date: 2017-10-20
浙江精迈高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although there are many domestic and foreign patent periodicals on the modification of polyacrylic acid microspheres, there are no relevant literature reports on the technical method of preparing composite microspheres using amino resin and acrylic resin.

Method used

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  • A kind of preparation method of amino-modified acrylic resin composite microsphere

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of Nanoscale Amino Resin Particle Dispersion

[0039] Place a four-neck flask equipped with a stirrer, thermometer, reflux condenser and nitrogen tube in a super constant temperature water bath, add 100 parts of formaldehyde solution (concentration 37%), 50 parts of melamine, and adjust the pH of the system with 10% soda ash solution value to 8.5, the temperature was raised to 75°C, and the reaction was carried out for 40 minutes to obtain an amino resin prepolymer.

[0040] Add 800 parts of water to another reaction vessel, then add 10 parts of sodium succinyl sulfonate, stir and dissolve evenly, raise the temperature to 75°C, add amino resin prepolymer into it, stir and mix evenly, add 28 parts of 10% aminosulfonate The acid solution was heated to 85° C., and the polycondensation reaction was carried out for 3 hours to obtain a dispersion of nano-sized amino resin particles with a particle size of about 0.2 microns.

[0041]2. Preparation of amino-modi...

Embodiment 2

[0045] 1. Preparation of Nanoscale Amino Resin Particle Dispersion

[0046] Place a four-necked flask equipped with a stirrer, thermometer, reflux condenser and nitrogen pipe in a super constant temperature water bath, add 110 parts of formaldehyde solution (concentration 37%), 45 parts of melamine, 15 parts of benzomelamine, and use 10 parts % soda ash solution to adjust the pH value of the system to 8.8, raise the temperature to 75° C., and react for 60 minutes to obtain an amino resin prepolymer.

[0047] Add 800 parts of water to another reaction vessel, then add 10 parts of sodium succinyl sulfonate, stir and dissolve evenly, raise the temperature to 75°C, add amino resin prepolymer into it, stir and mix evenly, add 25 parts of 10% aminosulfonate The acid solution was heated to 85° C., and the polycondensation reaction was carried out for 3 hours to obtain a dispersion of nano-sized amino resin particles with a particle size of about 0.5 microns.

[0048] 2. Preparation ...

Embodiment 3

[0052] 1. Preparation of Nanoscale Amino Resin Particle Dispersion

[0053] Put a four-necked flask equipped with a stirrer, thermometer, reflux condenser and nitrogen tube in a super constant temperature water bath, add 96 parts of formaldehyde solution (concentration 37%), 5 parts of urea, 40 parts of melamine, and use 10% soda ash Adjust the pH value of the system to 8.5 with the solution, raise the temperature to 75° C., and react for 30 minutes to obtain an amino resin prepolymer.

[0054] Add 800 parts of water to another reaction vessel, then add 12 parts of sodium dodecylbenzenesulfonate, stir and dissolve evenly, raise the temperature to 75°C, add amino resin prepolymer into it, stir and mix evenly, add 30 parts of 10% The p-toluenesulfonic acid solution was heated to 85° C., and the polycondensation reaction was carried out for 3 hours to obtain a dispersion of nano-sized amino resin particles with a particle size of about 0.25 microns.

[0055] 2. Preparation of am...

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Abstract

The invention relates to a preparation method of amino modified acrylic resin composite microspheres. According to the method, the composite microspheres prepared by the method have better haze and photodiffusion effect than the single acrylic acid microspheres, and thus, can be used as a photodiffusant in optical films and photodiffusion plates. The technical scheme is as follows: the preparation method sequentially comprises the following steps: (1) preparing an amino resin prepolymer; (2) preparing a nano amino resin particle dispersion solution; (3) forming micron-sized monomer droplets with uniform particle size; (4) carrying out polymerization reaction, and heating to further react; and (5) after the reaction finishes, filtering the product material, cleaning the filter cake with a cleaning solution, filtering, drying and pulverizing to obtain the amino resin-acrylic resin composite microspheres. Preferably, the amino compound in the step (1) is one or the mixture of several of urea, melamine and benzoguanamine in any ratio.

Description

technical field [0001] The invention relates to a method for modifying polyacrylic acid microspheres, in particular to a method for preparing composite microspheres by modifying amino resin and acrylic resin. Background technique [0002] The preparation method and application of polyacrylic acid microspheres have been mentioned in many domestic and foreign literatures, and they are basically prepared by suspension polymerization, dispersion polymerization, seed polymerization and emulsion polymerization. In order to endow it with special functions in some aspects, it needs to be copolymerized or cross-linked with other functional monomers. The microsphere products prepared by this process formula change can be applied to different application fields, such as light diffusing powder, Electronic information, cosmetics, biomedical and chemical analysis, etc. [0003] The preparation and modification methods of polyacrylic acid microspheres have been reported in patent document...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F220/06C08F220/14C08F220/18C08F222/14C08F2/20C08G12/32C08G12/38B01J13/04B01J13/14
CPCB01J13/04B01J13/14C08F2/20C08F283/00C08G12/32C08G12/38C08F220/14
Inventor 杨少平李胜何建伟
Owner 浙江精迈高分子材料有限公司
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