Airgel-modified polypropylene, ultra-light thermal insulation melt-blown nonwoven fabric and preparation method thereof

A melt-blown non-woven fabric, thermal insulation technology, applied in non-woven fabric, single-component polypropylene rayon, rayon manufacturing and other directions, can solve the problems of uncontrollable particle size, poor uniformity of aerogel dispersion, etc. achieve long service life

Active Publication Date: 2020-06-09
江苏弘源淏尔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide an airgel-modified polypropylene, an ultra-light heat-insulating melt-blown nonwoven fabric and a preparation method thereof, so as to solve the problem of airgel-modified nonwoven fabric prepared by the melt-blown method in the prior art. The technical problems of poor dispersion uniformity and uncontrollable particle size of airgel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] According to a typical embodiment of the present invention, a method for preparing airgel-modified polypropylene is provided. The preparation method comprises the following steps: before the polymerization reaction or during the polymerization reaction, airgel is added and blended with the reaction material having a relatively low viscosity to realize the uniform dispersion of the airgel, and the airgel is prepared by a propylene polymerization process. Adhesive modified polypropylene; wherein, the reaction materials include propylene monomer, catalyst and additives, the particle size of the airgel is between 20nm and 100μm, the porosity is between 40% and 99.9%, and the bulk density is 3 to 500g / L, the volume fraction accounts for 20% to 60% of the volume of the ultra-light heat-insulating melt-blown nonwoven fabric prepared from airgel-modified polypropylene.

[0020] In the present invention, the catalyst can be a Ziegler-Natta catalyst system or a metallocene catal...

Embodiment approach

[0022] According to a typical embodiment of the present invention, the propylene polymerization process is a gas phase propylene polymerization process, a slurry propylene polymerization process or a liquid phase propylene polymerization process.

[0023] According to a typical embodiment of the present invention, in the gas phase propylene polymerization process, adding airgel and blending with the reaction material having a lower viscosity includes blending the airgel with propylene monomer, or blending with a catalyst , or added separately to the polymerization reaction device to blend with the reaction materials, or any combination of the above blending methods.

[0024] According to a typical embodiment of the present invention, in the slurry propylene polymerization process, adding airgel and blending with the reaction material having a relatively low viscosity includes mixing the airgel with a slurry formed by catalyst and hydrocarbon solvent Liquid blending, or blendin...

Embodiment 1

[0033] Gas phase method:

[0034] The aerogel is dehydrated and dried by heat drying or a dehydrating agent; the dehydrated aerogel is deoxidized by an inert gas or a deoxidizing agent to obtain a dry and deoxygenated aerogel.

[0035] Catalyst with ultra-high activity TiCl 3 / Diisobutyldimethoxysilane / MgCl 2 / Et 3 Al (mass ratio is 25:55:21:53, TiCl 3 8ppm), refined propylene monomer, hydrogen (150ppm) and dehydrated and deoxygenated airgel (2wt% of propylene) were sequentially added to the first horizontal stirred bed reactor, stirring was started, the temperature was raised to 71°C, and the pressure was 2.25MPa. The obtained polypropylene powder is sent to the second horizontal stirred bed reactor through the powder conveying fan, and at the same time, the refined propylene monomer and hydrogen are added to the second horizontal stirred bed reactor, the stirring is started, the temperature is raised to 71°C, and the pressure 2.25MPa. After the polymerization reaction, ...

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Abstract

The invention discloses an airgel-modified polypropylene, an ultra-light heat-insulating and heat-preserving melt-blown nonwoven fabric and a preparation method thereof. Among them, the preparation method includes: before the polymerization reaction or during the polymerization reaction, adding aerogel and blending with the reaction material with a lower viscosity to realize the uniform dispersion of the aerogel, and prepare the airgel modified polymer Propylene; wherein, the reaction material includes propylene monomer, catalyst and auxiliary agent, the particle size of the airgel is between 20nm and 100μm, the porosity is between 40% and 99.9%, the bulk density is 3 to 500g / L, and the volume The fraction accounts for 20% to 60% of the volume of the ultra-light heat-insulating melt-blown nonwoven fabric prepared from the airgel-modified polypropylene. The invention prepares airgel-modified polypropylene particles with good melt-blown performance and a melt-blown polypropylene nonwoven fabric with ultra-light heat insulation function in which the airgel is evenly dispersed, and the airgel in the nonwoven fabric is used No shedding occurred during the process.

Description

technical field [0001] The invention relates to the field of non-woven fabric materials, in particular to an airgel-modified polypropylene, an ultra-light heat-insulating and heat-preserving melt-blown non-woven fabric and a preparation method thereof. Background technique [0002] Non-woven fabric is a kind of fabric formed without spinning and weaving. It is just oriented or randomly arranged textile short fibers or filaments to form a web structure, which is then reinforced by mechanical, thermal bonding or chemical methods. [0003] At present, there are various processes for preparing nonwoven fabrics. For example, in the paper "Preparation and Performance Research of Silica Airgel / Polypropylene Meltblown Nonwoven Materials", it is given that the fusion of polypropylene and airgel A method for preparing airgel-modified polypropylene melt-blown nonwovens by blending. In CN104446333B, the PP (polypropylene) fiber is silanized by APTES (3-aminopropyltriethoxysilane) and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4291D04H1/54D04H3/007D04H3/14C08F110/06C08F2/44C08K3/36
CPCD04H1/4291D04H1/54D04H3/007D04H3/14C08F110/06C08K3/36C08K2201/011C08F2/44D04H3/16D04H3/016D01D1/00D01F1/10D01F6/06D01D5/0985C08F2/34C08F4/6543C08F4/6492C08F4/642C08F4/6576C08F2/01
Inventor 李光武
Owner 江苏弘源淏尔新材料科技有限公司
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