Modified foaming agent, microfoamed polypropylene material and preparation method

A polypropylene material and foaming agent technology, which is applied in the field of modified foaming agent, micro-foaming polypropylene material and its preparation, can solve the problems of not being able to meet environmental protection, restricting the use of AC foaming agent, etc.

Active Publication Date: 2020-01-17
中化石化销售有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The decomposition products of AC foaming agent mainly include N 2 , CO, CO 2 , Ammonia, due to the presence of ammonia, the products prepared by using AC blowing agent cannot meet the requirements of environmental protection, which seriously limits the use of AC blowing agent in polypropylene

Method used

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  • Modified foaming agent, microfoamed polypropylene material and preparation method
  • Modified foaming agent, microfoamed polypropylene material and preparation method

Examples

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preparation example Construction

[0023] In at least some embodiments of the present invention, the present invention provides a method for preparing a modified foaming agent, comprising: adding azodicarbonamide and aliphatic glycidyl ester into a flask at a molar ratio of 1:1.5 to 1:3 , the solvent is dimethylformamide or dimethyl sulfoxide, the solid content is 10-30%, placed in a water bath at 60°C, the reaction time is controlled for 1-3 hours, the solvent is removed and then dried to obtain the modified foaming agent. In at least some embodiments of the present invention, the obtained modified blowing agent has a decomposition temperature of 222°C-230°C, such as 224°C-227°C, and the ammonia content of the generated gas is less than 1%.

[0024] The modified foaming agent prepared by the above method can be used to prepare micro-foamed polypropylene material. The heat-resistant temperature of the prepared micro-foamed polypropylene material is high, and the modified foaming agent does not decompose during ...

Embodiment 1

[0027] Example 1 provides a method for preparing a modified blowing agent.

Embodiment 2

[0054] Example 2 provides the preparation method of micro-foamed polypropylene material.

[0055] Experimental group a

[0056] Experimental group a provides a kind of micro-foaming polypropylene material, and it comprises:

[0057] Polypropylene resin, the melt index of described polypropylene resin is 38g / 10min;

[0058] The modified foaming agent prepared by experimental group 1, the mass percentage of modified foaming agent and polypropylene resin is 1%;

[0059] Nucleating agent (3,4-dimethylbenzylidene sorbitol), the mass percentage of 3,4-dimethylbenzylidene sorbitol and polypropylene resin is 16%;

[0060] Antioxidant (DLTP), the mass percentage of DLTP and polypropylene resin is 0.2%;

[0061] Lubricant (calcium stearate), the mass percentage of calcium stearate and polypropylene resin is 0.8%.

[0062] The above microfoamed polypropylene material was prepared by the following method:

[0063] Add modified foaming agent, nucleating agent, antioxidant, lubricant t...

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Abstract

The invention relates to the field of polymer materials and in particular relates to a modified foaming agent, a microfoamed polypropylene material and a preparation method. The modified foaming agentcomprises aliphatic glycidyl ester modified azodicarbonamide. The microfoamed polypropylene material comprises polypropylene resin, the modified foaming agent, a nucleating agent, an antioxidant anda lubricant. By introducing aliphatic glycidyl ester with an epoxy grpup into the azodicarboxylamide, the generation of ammonia is restricted, and the microfoamed polypropylene material with the modified foaming agent can be more environmentally friendly.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a modified foaming agent, micro-foamed polypropylene material and a preparation method. Background technique [0002] Micro-foamed polypropylene special material is a modified material that has emerged in recent years. It has the advantages of low product shrinkage, short molding time, weight reduction, and raw material saving. It has been widely used in the fields of auto parts and electronic products. prospect. Azodicarbonamide (AC) is one of the most commonly used foaming agents for the production of micro-foamed polypropylene. Both Chinese patent application 201310727884 and Chinese patent application 201710559553 use AC foaming agents in micro-foamed polypropylene. The decomposition products of AC foaming agent mainly include N 2 , CO, CO 2 , Ammonia, due to the presence of ammonia, the products prepared by using AC blowing agent cannot meet the requirements of environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/10C08L23/12
CPCC08J9/102C08J2323/12C08J2203/04
Inventor 李波梁胜轲王武聪杜中杰孙佩鑫侯斌
Owner 中化石化销售有限公司
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