Polysiloxane microsphere foaming agent for expanded polypropylene plastics and preparation method

A technology of microsphere foaming agent and foamed polypropylene, which is applied in the field of foamed materials, can solve the problems of polypropylene chain breakage and unsatisfactory polypropylene melt effect, achieve good foaming uniformity, improve melting Body strength and ductility, good effect of pore size consistency

Inactive Publication Date: 2017-12-29
CHENDU NEW KELI CHEM SCI CO LTD
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of chemical cross-linking modification, there are breakages of polypropylene chains at the same time, and sometimes only breakage without cross-linking, so the use of simple cross-linking agents is not ideal for improving the melt strength of polypropylene.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A polysiloxane microsphere foaming agent for foaming polypropylene plastics, its components include: polysiloxane microspheres 67wt%, azo foaming agent 32wt%, the rest is a small amount of water, and the particle size is 1.2 μm.

[0034] The raw material for preparing a polysiloxane microsphere blowing agent of expanded polypropylene plastics comprises:

[0035] Methylethoxysilane 78g

[0036] Azodicarbonamide 17g

[0037] Diisopropyl azodicarboxylate 5g

[0038] 25% ammonia water 50g

[0039] 37% hydrochloric acid 50g

[0040] Deionized water 200g

[0041] After mixing the deionized water and the azo-type inorganic foaming agent, use a high-pressure homogenizer to perform homogenization treatment to obtain a milky suspension. Put the azo-type inorganic foaming agent and water homogeneous milky suspension as the reaction base liquid, put it into a flask, and then put the flask into an ultrasonic cleaner equipped with a mixture of ice and water, the power density is ...

Embodiment 2

[0050] A polysiloxane microsphere foaming agent for foaming polypropylene plastics, its components include: polysiloxane microspheres 75wt%, azo foaming agents 25wt%, the rest is a small amount of water, and the particle size is 4.9 μm.

[0051] The raw material for preparing a polysiloxane microsphere blowing agent of expanded polypropylene plastics comprises:

[0052] Methylethoxysilane 86g

[0053] Azodicarbonamide 9g

[0054] Diisopropyl azodicarboxylate 5g

[0055] 25% ammonia water 50g

[0056] 37% hydrochloric acid 50g

[0057] Deionized water 100g

[0058] After mixing the deionized water and the azo-type inorganic foaming agent, use a high-pressure homogenizer to perform homogenization treatment to obtain a milky suspension. Put the azo-type inorganic foaming agent and water homogeneous milky suspension as the reaction base liquid, put it into a flask, and then put the flask into an ultrasonic cleaner equipped with a mixture of ice and water, the power density i...

Embodiment 3

[0067] A polysiloxane microsphere foaming agent for foaming polypropylene plastics, its components include: polysiloxane microspheres 89wt%, azo foaming agents 10wt%, the rest is a small amount of water, and the particle size is 3.7 μm.

[0068] The raw material for preparing a polysiloxane microsphere blowing agent of expanded polypropylene plastics comprises:

[0069] Methylethoxysilane 96g

[0070] Diisopropyl azodicarboxylate 4g

[0071] 25% ammonia water 50g

[0072] 37% hydrochloric acid 50g

[0073] Deionized water 300g

[0074] After mixing the deionized water and the azo-type inorganic foaming agent, use a high-pressure homogenizer to perform homogenization treatment to obtain a milky suspension. Put the azo-type inorganic foaming agent and water homogeneous milky suspension as the reaction base liquid, put it into a flask, and then put the flask into an ultrasonic cleaner equipped with a mixture of ice and water, the power density is greater than 0.3w / cm2, The ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention aims to provide a polysiloxane microsphere foaming agent for expanded polypropylene plastics and a preparation method. The polysiloxane microsphere foaming agent is prepared from hollow polysiloxane microspheres and an azo foaming agent contained in the hollow microspheres, wherein the azo foaming agent contains at least one of azodicarbonamide and diisopropyl azodicarboxylate; the foaming agent is prepared from 67wt%-89wt% by weight of the polysiloxane microspheres, 11wt%-32wt% by weight of the azo foaming agent and the balance of water, and the particle size is 1.2-4.9 mu m. The foaming agent is applied to the expanded polypropylene plastics and has certain interactions with polypropylene macromolecules, the interactions can serve as physical cross-linking points during melting, so that slip between the polypropylene macromolecules becomes more difficult, the polypropylene melt strength is improved, and high-quality expanded polypropylene materials are obtained.

Description

technical field [0001] The invention belongs to the technical field of foaming materials, and in particular relates to a polysiloxane microsphere foaming agent for foaming polypropylene plastics and a preparation method thereof. Background technique [0002] In the past 10 years, the average annual growth rate of polypropylene resin production in my country has reached 23.1%. In 2010, the production capacity of polypropylene resin in my country reached 6.5 million tons per year. However, at present, polypropylene resin in my country is mainly used in woven products and agricultural films, etc., and the polypropylene resin industry faces the problems of single consumption structure, low demand and low-grade products. [0003] E polypropylene (Expanded Polypropylene) is an expanded polypropylene material. It is a high-performance high-crystalline polymer / gas composite material. With its unique and superior performance, it has become the fastest growing environmentally friendly...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/04C08J9/10C08L23/12C08L83/04
CPCC08G77/04C08J9/102C08J9/103C08J2323/12C08J2483/04C08L23/12C08L2203/14C08L83/04
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap