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Thermal expansion microspherical composition with foaming performance at low temperature, and preparation method thereof

A technology of thermal expansion microspheres and foaming performance, applied in the field of polymer materials, can solve the problems of high Tstart and limited application, and achieve the effect of improving fluidity and dispersibility

Inactive Publication Date: 2017-06-13
NANOSPHERE SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the patent CN102746454A, it is proposed that the polar monomer sodium styrene sulfonate is introduced into the surface of the microsphere, which effectively improves the dispersibility of the microsphere, but the T of the thermally expandable microsphere prepared by this method start High, which limits its application in some fields

Method used

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  • Thermal expansion microspherical composition with foaming performance at low temperature, and preparation method thereof
  • Thermal expansion microspherical composition with foaming performance at low temperature, and preparation method thereof
  • Thermal expansion microspherical composition with foaming performance at low temperature, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This embodiment relates to a preparation method of a thermally expandable microsphere composition having foaming properties at low temperatures, comprising the following steps:

[0053] 1. By mixing 80g of acrylonitrile, 20g of methyl methacrylate, 50g of methyl acrylate, 1.2g of sodium styrene sulfonate, 0.8g of trimethylolpropane trimethacrylate, 4g of benzoyl peroxide and 50g of iso Butane obtains the oil phase of suspension polymerization;

[0054] 2. Add 280g deionized water, 30g sodium hydroxide, 40g sodium chloride and 0.2g sodium lauryl sulfate to the No. 1 beaker and fully dissolve it; add 280g deionized water and 85g magnesium chloride hexahydrate to the No. 2 flask, 30g of sodium chloride and 0.01g of sodium nitrite are fully dissolved; first pour the solution in No. 1 beaker into a 2.5L three-necked flask with a stirring paddle, and then slowly add Solution in flask No. 2. After adding, fully stir for 15 minutes to obtain the aqueous phase of suspension po...

Embodiment 2～8

[0056] Examples 2-8: Except for changing the type and amount of monomers, crosslinking agents, initiators and foaming agents used, other conditions are the same as in Example 1, and the properties of different thermally expandable microspheres prepared are shown in Table 2 shown.

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Abstract

The invention provides a thermal expansion microspherical composition with foaming performance at low temperature. The composition comprises an alkene unsaturated monomer and a foaming agent, wherein the alkene unsaturated monomer comprises the following components: acrylonitrile, acrylics monomer and polar end-containing monomer. Mainly by replacing vinylidene chloride monomers in the prior art with acrylics monomers, the thermal expansion microspheres with low Tstart (70-90DEG C) and high expansion performance can be obtained, the dispersibility of the microspheres in water can be improved to achieve the intended purpose by adding polar end-containing alkene unsaturated monomer.

Description

technical field [0001] The invention relates to a heat-expandable microsphere composition with foaming performance at low temperature and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Heat-expandable thermoplastic microspheres are microspheres with a core-shell structure mainly composed of a thermoplastic polymer as the shell and a foaming agent as the core. In such microspheres, the swelling substance is generally a liquid having a boiling point no higher than the softening temperature of the thermoplastic polymer shell. Under heating conditions, the expansion agent vaporizes, the internal pressure increases, and at the same time, the thermoplastic polymer (shell) softens, and the microspheres expand significantly. The temperature at which the microspheres begin to expand is called T start , the temperature at which the maximum expansion is reached is called T max . [0003] In some application fields,...

Claims

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Application Information

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IPC IPC(8): C08F220/44C08F220/14C08F212/14C08F222/14C08F220/18C08F2/18C08J9/20
CPCC08F2/18C08F220/44C08J9/20C08J2203/14C08J2333/20C08F220/14C08F212/14C08F222/103C08F220/18C08F220/1804C08F222/102
Inventor 孙伟贤李玲玲高英王静文张明明刘峰
Owner NANOSPHERE SHANGHAI
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