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Heat-insulating master batch and preparation method thereof

A heat insulation and masterbatch technology, which is applied in the field of materials, can solve the problems of masterbatch performance degradation, easy damage to the structure, easy degradation of polymers, etc., and achieve good heat insulation performance

Active Publication Date: 2020-08-14
HONG WARM FIBERS TECH BEIJING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The main purpose of the present invention is to provide a heat insulation masterbatch and its preparation method to solve the problem of the small proportion of nanoporous materials, easy structure damage, The polymer is easy to degrade, and the need for additional compatibility additives can easily lead to problems such as the decline in the performance of the masterbatch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] In order to solve the above problems, the present invention provides a preparation method of thermal insulation masterbatch, which includes the following steps: S1, placing the mixture of the first polymer particles and the nanoporous material on a preheated vertical plunger In the barrel of the extruder, continue heating, and after the first polymer particles reach a partially plasticized state, start the plunger to make the mixture pass through the die and cast the belt, and then cool, pelletize, and dry to obtain a premix ; S2, mixing the premix and the second polymer particles, then placing them in a twin-screw extruder, through extrusion, casting, cooling, dicing, and drying to obtain thermal insulation masterbatch; wherein, the first The materials of the polymer particles and the second polymer particles are thermoplastic polymers, and the particle diameters of the first polymer particles and the second polymer particles are 0.25 to 5.0 mm (the particle size of the...

Embodiment 1

[0042] Step S1: The SiO 2 Aerogel and PP particles (melting point of 166°C) were added to a vertical plunger extruder in a mass ratio of 4:7 to heat up, wherein SiO 2 The particle size of the aerogel is 24 μm, the bulk density is 46 g / L, the porosity is 96%, the particle size of the PP particles is 0.83 mm, and the temperature of the vertical plunger extruder is 168 ° C; After the PP particles at 1 / 9R are melted, the plunger extruder is started, and the mixture is subjected to casting, water cooling, dicing, and hot air drying to obtain a premix.

[0043] Step S2: the premix and the PP particles are added to the twin-screw in a mass ratio of 3:1 for blending and granulation, wherein the particle size of the PP particles is 3.5 mm; get SiO 2 Aerogel modified PP thermal insulation masterbatch, in which SiO 2 The mass fraction of aerogel is 27%.

[0044] Above-mentioned master batch and PP particle are 1:12.5 metering feeding by mass ratio, obtain SiO through melt blowing 2 ...

Embodiment 2

[0046] The preparation process is the same as that of Example 1, except that in step S1, the SiO 2 The mass ratio of aerogel and PP particles is 1:2, the particle size of PP particles is 3.5mm, and the PP at a distance of 1 / 7R from the inner wall of the barrel is melted and extruded; in step S2, the mass ratio of premix and PP particles is is 3:1, SiO in the obtained masterbatch 2 The mass fraction of aerogel is 25%.

[0047] Above-mentioned master batch and PP particle are 1:11.5 metering feeding by mass ratio, obtain SiO through melt blowing 2 Aerogel-modified PP non-woven fabric with SiO in the non-woven fabric 2 The mass fraction of aerogel is 2%, and the density of PP fiber is 0.775g / cm 3 , The thermal conductivity is 0.0402W / (m·k).

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Abstract

The invention provides a heat-insulating master batch and a preparation method thereof. The method comprises the following steps of: S1, putting a mixed material of first polymer particles and a nano-pore material into a preheated charging barrel of a vertical plunger extruder, continuously heating, starting a plunger to enable the mixed material to pass through a die head and cast a strip after the first polymer particles reach a partial plasticizing state, and cooling, pelletizing and drying to obtain a premix; S2, mixing the premix with the second polymer particles, putting the mixture intoa double-screw extruder, and performing extrusion, strip casting, cooling, pelletizing and drying to obtain the heat-insulating master batch, wherein the first polymer particles and the second polymer particles are both made of thermoplastic polymers, the particle size of the first polymer particles and the particle size of the second polymer particles are 0.25-5.0 mm, and the particle size of the nano-pore material is 20 nm-400 [mu] m. According to the invention, the master batch with higher nano-pore material proportion and better heat insulation performance can be prepared on the basis ofnot adding an additional compatilizer.

Description

technical field [0001] The invention relates to the field of materials, in particular to a thermal insulation master batch and a preparation method thereof. Background technique [0002] Thermal insulation masterbatch is an important raw material for the preparation of thermal insulation polymer products. Its preparation methods are mainly divided into physical blending method and in-situ polymerization method. Examples are as follows: [0003] CN106319662 A "A kind of thermal insulation fiber and its preparation method and use", the patent adopts in-situ polymerization method to prepare modified master batch or slices of micro-nano porous material particles, specifically, firstly crushing the micro-nano porous material particles to below 8 μm , the micro-nano porous material particles and conventional additives are added to the monomer or prepolymer of the fiber raw material and mixed evenly, and then polymerized and granulated according to the material polymerization proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L67/02C08L23/06C08L77/02C08K7/26C08K7/24C08J3/22B29B9/06
CPCC08J3/226B29B9/06C08J2323/12C08J2423/12C08K7/26C08J2467/02C08J2367/02C08J2323/06C08J2423/06C08K7/24C08J2377/02C08J2477/02
Inventor 李光武赵国樑薛蓉
Owner HONG WARM FIBERS TECH BEIJING CO LTD