Flame-retardant heat-expanding microcapsule and preparation method thereof

A technology of thermal expansion microcapsules and flame retardancy, which is applied in the field of flame-retardant thermal expansion microcapsules and its preparation, can solve the problems of high warming coefficient, high cost of fluorine-containing organic compounds, and increased production cost of microcapsules, and achieve good resistance The effect of flammability

Active Publication Date: 2018-10-12
三明市锦浪新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fluorine-containing organic compounds are used as foaming agents, which have super chemical stability and have a serious impact on the global environment. They have certain ozone layer destruction ability or high warming coefficient and other environmental disadvantages. At the same time, the cost of fluorine-containing organic compounds is high. , even commercialization increases the production cost of microcapsules
[0007] It can be seen that in the existing preparation technology, there is not yet a fully commercialized flame-retardant thermally expandable microcapsule

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of heat-expandable microcapsules

[0035] (1) Prepare the water phase: the inorganic salt chlorination of the suspension agent colloidal silicon dioxide (effective content 30%) of 40g, the auxiliary dispersant polyvinylpyrrolidone of 1.5g, the polymerization inhibitor sodium nitrite of 0.5g and 200g Sodium is added to 600g of deionized water to form a water phase composition, and phosphoric acid is used to adjust the pH value of the water phase composition to 2-3;

[0036](2) Preparation of oil phase: 130g of acrylonitrile, 50g of methacrylonitrile, 20g of methyl methacrylate, 40g of isopentane, 2.0g of oil-soluble initiator azobisisobutyronitrile, 1.0g The cross-linking agent diethylene glycol dimethacrylate and 20g of oil-soluble flame retardant environment-friendly chlorinated paraffin are mixed, and stirred evenly to form an oil phase composition;

[0037] (3) Suspension preparation: add the oil phase composition to the water phase composition, and s...

Embodiment 2

[0041] (1) Prepare the water phase: the inorganic salt chlorination of the suspension agent colloidal silicon dioxide (effective content 30%) of 40g, the auxiliary dispersant polyvinylpyrrolidone of 1.5g, the polymerization inhibitor sodium nitrite of 0.5g and 200g Sodium is added to 600g of deionized water to form a water phase composition, and phosphoric acid is used to adjust the pH value of the water phase composition to 2-3;

[0042] (2) Preparation of oil phase: 130g of acrylonitrile, 50g of methacrylonitrile, 20g of methyl methacrylate, 40g of isopentane, 2.0g of oil-soluble initiator dibenzoyl peroxide, 1.0g The cross-linking agent diethylene glycol dimethacrylate and 20g of oil-soluble flame retardant environment-friendly chlorinated paraffin are mixed, and stirred evenly to form an oil phase composition;

[0043] (3) Suspension preparation: add the oil phase composition to the water phase composition, and stir at room temperature at a stirring speed of 5000r / min for ...

Embodiment 3

[0047] 1. Preparation of heat-expandable microcapsules

[0048] (1) Prepare the water phase: the inorganic salt chlorination of the suspension agent colloidal silicon dioxide (effective content 30%) of 40g, the auxiliary dispersant polyvinylpyrrolidone of 1.5g, the polymerization inhibitor sodium nitrite of 0.5g and 200g Sodium is added to 600g of deionized water to form a water phase composition, and phosphoric acid is used to adjust the pH value of the water phase composition to 2-3;

[0049] (2) Preparation of oil phase: 130g of acrylonitrile, 50g of methacrylonitrile, 20g of methyl methacrylate, 40g of isopentane, 2.0g of oil-soluble initiator azobisisobutyronitrile, 1.0g The cross-linking agent diethylene glycol dimethacrylate and 20g of the oil-soluble flame retardant pentafluoroethoxycyclotriphosphazene are mixed and stirred evenly to form an oil phase composition;

[0050] (3) Suspension preparation: add the oil phase composition to the water phase composition, and st...

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Abstract

The invention discloses a flame-retardant heat-expanding microcapsule. The flame-retardant heat-expanding microcapsule is prepared from a suspension dispersion liquid of an oil phase composition and an aqueous phase composition through a suspension polymerization method, wherein the oil phase composition accounts for 10-40% of the mass of the suspension dispersion liquid, and the oil phase composition comprises the following components of: in parts by weight, 100 parts of polymerizable monomers, 20-40 parts of low-boiling-point alkane, 0.1-2 parts of an oil-soluble initiator, 0.1-5 parts of acrosslinking agent and 5-30 parts of an oil-soluble flame retardant. The invention also discloses a preparation method of the flame-retardant heat-expanding microcapsule, and the prepared flame-retardant heat-expanding microcapsule has a small burden on the environment, excellent flame retardant performance and low cost.

Description

technical field [0001] The invention relates to a heat-expandable microcapsule, in particular to a flame-retardant heat-expandable microcapsule and a preparation method thereof. Background technique [0002] Thermally expandable microcapsules are microcapsules formed by wrapping a low-boiling point physical blowing agent with a thermoplastic polymer shell with good gas barrier properties, and are generally formed by suspension polymerization of polymerizable monomers and blowing agents in a water-soluble dispersion system . [0003] Traditional chemical foaming methods are basically used in resin foaming to achieve lightweight and control of cell structure. However, the surface quality problem of the foamed material cannot be solved by using the chemical foaming method. Whether it is a chemical foaming system or a supercritical physical foaming system, the formation of cells depends on the diffusion of gas, and the related problems of cell merging, coarsening and surface q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/44C08F222/14C08F220/14C08F220/56C08F220/18C08F214/08C08F220/06C08F2/20C08L33/20C08L91/06B01J13/14
CPCB01J13/14C08F2/20C08F220/44C08L33/20C08L2201/02C08L91/06C08F220/18C08F220/14C08F222/103C08F220/06C08F220/1802C08F220/56C08F222/102C08F214/08
Inventor 丁友家陈敬清彭本权李德福林杏江林志辉
Owner 三明市锦浪新材料科技有限公司
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