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Composite flame-retardant foaming agent for foamed plastic and preparation method thereof

A composite flame retardant and composite flame retardant technology, applied in the field of foaming materials, can solve problems such as narrow temperature range, difficult stability of foaming process, and foam wall rupture

Inactive Publication Date: 2021-04-23
江苏威久科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the narrow temperature range suitable for foaming, the foaming process of polypropylene foam is difficult to stabilize, and it is easy to cause foam wall rupture, bubble merging, and open cells during the foaming process.
In addition, the foaming properties currently on the market are often relatively single in performance. With the continuous development of the foam plastics industry, the needs of various demanders for foaming agents are not only a single foaming performance, but more need to have anti-oxidation properties. , heat resistance, flame retardant and other comprehensive properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A composite flame retardant foaming agent for foam plastics is composed of the following raw materials in mass fractions: foaming agent microspheres 90wt.%, composite flame retardant 10wt.%.

[0035] The foaming agent microspheres are composed of the following raw materials in parts by weight: 65 parts of foaming agent, 20 parts of polycaprolactone, and 13 parts of polyvinyl alcohol.

[0036] The composite flame retardant is mainly composed of the following raw materials in parts by weight: 55 parts of polysiloxane microspheres, 18 parts of trimethyl phosphite, and 18 parts of ammonium polyphosphate.

[0037] The foaming agent is azobisisobutyronitrile, and the particle diameter of the foaming agent microspheres is 40 μm.

[0038] A preparation method of a composite flame-retardant foaming agent for foamed plastics, comprising the following steps,

[0039] (1) Dissolving polycaprolactone in dichloromethane to obtain a mixed solution A; at a temperature of 0°C, disperse...

Embodiment 2

[0045]A composite flame retardant foaming agent for foam plastics is composed of the following raw materials in mass fractions, foaming agent microspheres 93wt.%, composite flame retardant 7wt.%.

[0046] The foaming agent microspheres are composed of the following raw materials in parts by weight: 68 parts of foaming agent, 21 parts of polycaprolactone, and 15 parts of polyvinyl alcohol.

[0047] The composite flame retardant mainly consists of the following raw materials in parts by weight: 57 parts of polysiloxane microspheres, 20 parts of trimethyl phosphite, and 21 parts of ammonium polyphosphate.

[0048] The foaming agent is dimethyl azobisisobutyrate, and the particle diameter of the foaming agent microspheres is 50 μm.

[0049] A preparation method of a composite flame-retardant foaming agent for foamed plastics, comprising the following steps,

[0050] (1) Dissolving polycaprolactone in dichloromethane to obtain a mixed solution A; at a temperature of 5°C, disperse ...

Embodiment 3

[0056] A composite flame retardant foaming agent for foam plastics is composed of the following raw materials in mass fractions, foaming agent microspheres 95wt.%, composite flame retardant 5wt.%.

[0057] The foaming agent microspheres are composed of the following raw materials in parts by weight: 70 parts of foaming agent, 25 parts of polycaprolactone and 16 parts of polyvinyl alcohol.

[0058] The composite flame retardant is mainly composed of the following raw materials in parts by weight: 58 parts of polysiloxane microspheres, 25 parts of trimethyl phosphite, and 25 parts of ammonium polyphosphate.

[0059] The foaming agent is azodicarbonamide, and the particle diameter of the foaming agent microspheres is 60 μm.

[0060] A preparation method of a composite flame-retardant foaming agent for foamed plastics, comprising the following steps,

[0061] (1) Dissolving polycaprolactone in dichloromethane to obtain a mixed solution A; at a temperature of 10°C, disperse the fo...

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Abstract

The invention discloses a composite flame-retardant foaming agent for foamed plastic and a preparation method thereof. The composite flame-retardant foaming agent is prepared from the following raw materials in percentage by mass: 90-95wt% of foaming agent microspheres and 5-10wt% of composite flame retardant. The foaming agent microsphere is prepared by loading any one of azodiisobutyronitrile, azodicarbonamide, dimethyl azodiisobutyrate and N, N-dinitroso pentamethylene tetramine serving as a foaming agent into a polycaprolactone microsphere and forming a layer of protective film on the surface of the polycaprolactone microsphere by using polyvinyl alcohol. The composite flame retardant is mainly prepared from the following raw materials in parts by weight: 55-58 parts of polysiloxane microspheres, 18-25 parts of trimethyl phosphite and 18-25 parts of ammonium polyphosphate. The prepared composite flame-retardant foaming agent has good flame retardance, foamed plastic formed through foaming is good in mechanical property, the pore size of pores in the foamed plastic is uniform, and collapse is avoided.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a composite flame-retardant foaming agent for foamed plastics and a preparation method thereof. Background technique [0002] The foaming agent is a substance that makes the object of action form holes. The foaming agent can be divided into three categories: chemical foaming agent, physical foaming agent and surfactant according to different properties. [0003] Chemical blowing agents are those compounds that release gases such as carbon dioxide and nitrogen after thermal decomposition, and form pores in the polymer composition. Chemical foaming agents are divided into inorganic foaming agents and organic foaming agents, of which organic foaming agents mainly include azo compounds, sulfonyl hydrazine compounds, and nitroso compounds, and inorganic foaming agents mainly include carbonates , water glass, silicon carbide, carbon black. The physical foaming agent is that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/16C08J9/10C08J9/32C08L83/04C08L29/04C08L67/04C08K5/524C08K3/32C08L23/12
CPCC08J9/16C08J9/102C08J9/0066C08J9/0038C08J9/0061C08J9/103C08J9/107C08J9/32C08J2203/04C08J2483/04C08J2467/04C08J2429/04C08K2003/323C08K5/524C08J2323/12
Inventor 王新黄广晋
Owner 江苏威久科技发展有限公司