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A kind of preparation method of polyolefin microporous foam material

A microporous foam material and polyolefin technology, applied in the field of foam materials, can solve the problems of low production efficiency, long soaking and saturation time, etc., and achieve the effects of high foaming efficiency, uniform cells, and high carbon dioxide adsorption capacity

Active Publication Date: 2022-03-11
ZHEJIANG XINHENGTAI ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the supercritical fluid molding and foaming preparation process, the supercritical fluid soaking and saturation time of the polymer is long, and the production efficiency is low.

Method used

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  • A kind of preparation method of polyolefin microporous foam material
  • A kind of preparation method of polyolefin microporous foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of polyolefin microporous foam material, comprising the following steps:

[0037] S1. Grafting reaction: react epoxy-containing organosiloxane with polyolefin-grafted maleic anhydride to prepare olefin-grafted silicon-containing copolymer;

[0038] S2, banburying and blending: the polyolefin grafted silicon-containing group copolymer prepared by step S1 is sent into a banbury mixer for banburying and blending to obtain a silicone polymer with a continuous phase structure blends;

[0039] S3, pressing the board: using a tablet press to press the blend prepared in S2 into a board, and cutting;

[0040] It can be cut to any specified size.

[0041] S4. Supercritical molding and foaming: put the board prepared in S3 into an oven, preheat to the foaming temperature, and then put the preheated foaming mother board into a high-temperature mold, and pass in carbon dioxide gas. When the carbon dioxide gas is saturated in the sheet, the carbon dioxide gas ...

Embodiment 2

[0052] A preparation method of polyolefin microporous foam material, comprising the following steps:

[0053] S1. Grafting reaction: react epoxy-containing organosiloxane with polyolefin-grafted maleic anhydride to prepare olefin-grafted silicon-containing copolymer;

[0054] S2, banburying and blending: the polyolefin grafted silicon-containing group copolymer prepared by step S1 is sent into a banbury mixer for banburying and blending to obtain a silicone polymer with a continuous phase structure blends;

[0055] S3, pressing the board: using a tablet press to press the blend prepared in S2 into a board, and cutting;

[0056] It can be cut to any specified size.

[0057] S4. Supercritical molding and foaming: put the board prepared in S3 into an oven, preheat to the foaming temperature, and then put the preheated foaming mother board into a high-temperature mold, and pass in carbon dioxide gas. When the carbon dioxide gas is saturated in the sheet, the carbon dioxide gas ...

Embodiment 3

[0069] A preparation method of polyolefin microporous foam material, comprising the following steps:

[0070] S1. Grafting reaction: react epoxy-containing organosiloxane with polyolefin-grafted maleic anhydride to prepare olefin-grafted silicon-containing copolymer;

[0071] S2, banburying and blending: the polyolefin grafted silicon-containing group copolymer prepared by step S1 is sent into a banbury mixer for banburying and blending to obtain a silicone polymer with a continuous phase structure blends;

[0072] S3, pressing the board: using a tablet press to press the blend prepared in S2 into a board, and cutting;

[0073] It can be cut to any specified size.

[0074] S4. Supercritical molding and foaming: put the board prepared in S3 into an oven, preheat to the foaming temperature, and then put the preheated foaming mother board into a high-temperature mold, and pass in carbon dioxide gas. When the carbon dioxide gas is saturated in the sheet, the carbon dioxide gas ...

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Abstract

The invention discloses a preparation method of polyolefin microporous foaming material, which comprises the following steps: S1. Grafting reaction: reacting epoxy group-containing organosiloxane with polyolefin graft maleic anhydride to prepare olefin graft Branch silicon-containing group copolymer; S2, banburying and blending: the polyolefin grafted silicon-containing group copolymer that polyolefin, step S1 makes is sent into internal mixer, carries out banburying blending; S3, Pressing the plate: use a tablet press to press the blend prepared in S2 into a plate, and cut it; S4, supercritical molding and foaming: first preheat to the foaming temperature, then pass in carbon dioxide gas, and wait for the carbon dioxide gas When the sheet reaches saturation, the carbon dioxide gas in the mold is quickly released to make the sheet foam rapidly. The preparation method of the polyolefin microporous foam material of the present invention has good foaming effect, short production cycle and high foaming efficiency; the cells are dense, and have excellent mechanical properties and serviceability such as light weight and high strength.

Description

technical field [0001] The invention relates to the field of foaming materials, in particular to a method for preparing polyolefin microcellular foaming materials by using supercritical fluid. Background technique [0002] Polymer foam material is a polymer / gas composite material based on polymer. It has light weight, high specific strength, heat preservation, cushioning and other properties, and has good applications in many fields. [0003] At present, the preparation of foaming materials is mainly divided into chemical foaming and physical foaming. Chemical foaming generally uses azo foaming agents, which will produce harmful gases and chemical residues during the foaming process. Traditional logistics foaming methods include foaming with butane, hydrofluorine foaming agents, etc. [0004] 2016.08.03 authorized announcement of a patent with the publication number CN103102583B, titled "A Polypropylene Microcellular Foaming Material and Its Preparation Method", which discl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/12C08L23/06C08L23/12C08L51/06B29C44/12B29C44/60B29C43/02B29C43/58B29K105/04
CPCC08J9/122B29C44/12B29C44/60B29C43/02B29C43/58B29C2043/5808B29C2043/5816B29K2105/041C08J2203/06C08J2203/08C08J2323/06C08J2451/06C08J2205/044C08J2323/12
Inventor 王镇
Owner ZHEJIANG XINHENGTAI ADVANCED MATERIAL