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A kind of supercritical foaming nucleating agent and preparation method thereof

A foaming nucleating agent and supercritical technology, applied in the field of foamed plastics, can solve the problems of poor versatility of related nucleating agents, no new nucleating agents appearing, single variety of nucleating agents, etc. Melt strength, effect of improving reinforcement effect

Active Publication Date: 2022-05-24
浙江杰上杰新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanism or foaming mechanism of nucleating agents is basically based on the formation, nucleation, precipitation, and growth of hot spots. Relevant researchers pay more attention to polymer synthesis and modification research, but less research on the mechanism of related nucleating agents , leading to a single variety of nucleating agents in the industry, not many new nucleating agents appeared, and related nucleating agents have poor versatility or general nucleating effects, and finally had to spend a lot of effort on synthesis and modification

Method used

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  • A kind of supercritical foaming nucleating agent and preparation method thereof
  • A kind of supercritical foaming nucleating agent and preparation method thereof

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Embodiment 1-6

[0041] A supercritical foaming nucleating agent, the formulation of which is shown in Table 1.

[0042] The supercritical foaming nucleation agent is prepared by the following method: by air flow crushing of the raw material organic acids and their derivatives, inorganic acids and their derivatives and carbonates ground into a median particle size of 1-20 microns of ultrafine powder, and then add polymers, lubricants to pre-disperse the ultra-fine powder state of the material, through dense refining and granulation to obtain granular supercritical foaming nucleation agent.

[0043] Table 1 (Unit: kg)

[0044]

[0045]

[0046] The granular supercritical foaming nucleating agent prepared from the above embodiments is used to produce polypropylene foaming products, and the operation steps of polypropylene supercritical extrusion foaming are as follows:

[0047] (1) The extruder process conditions are set to: 170-175 °C in the first zone, 180-185 °C in the second zone, 190-198 °C...

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Abstract

The invention relates to a nucleating agent, in particular to a supercritical foaming nucleating agent and a preparation method thereof, belonging to the technical field of foam plastics. A supercritical foaming nucleating agent, the supercritical foaming nucleating agent is mixed by the following components by weight: 5-50 parts of organic acids and derivatives thereof, 0-50 parts of inorganic acids and derivatives thereof Parts, 5-50 parts of carbonate, 20-100 parts of polymer, 1-10 parts of dispersant. The nucleating agent has the advantages of good nucleating effect, and the prepared foamed product has the advantages of fine and uniform cells, no water marks, no depressions, no pinholes on the surface, and uniform and stable color of each batch of products.

Description

Technical field [0001] The present invention relates to a nucleating agent, in particular to a supercritical foaming nucleating agent and a preparation method thereof, belonging to the field of foam plastic technology. Background [0002] Foam plastic refers to a special type of plastic product with a polymer resin as the matrix and a large number of tiny bubbles inside. Because the bubbles are filled with gas, they can also be called composite plastics filled with gas. Currently, both thermoplastics and thermosets can be made into foam. The preparation of foam through the foaming process can reduce the material density, improve the specific strength of the material, and reduce the amount of plastic products used. In addition, foam plastic has the advantages of lightweight, thermal insulation, sound insulation, etc., and is widely used in packaging, transportation, construction and other aspects. [0003] Different from traditional chemical foaming, supercritical foaming uses ino...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/08C08J9/14C08L23/06
CPCC08J9/08C08J9/142C08J2203/184C08J2203/02C08J2203/12C08J2323/06C08J2423/06C08J2203/08
Inventor 罗李华
Owner 浙江杰上杰新材料股份有限公司
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