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Method for preparing mother material from nano grade inorganic powder material

An inorganic powder and nano-scale technology, which is applied in the field of preparing plastic masterbatches from nano-scale inorganic powders, can solve the problems of performance degradation, affecting the quality of masterbatches and application effects, and the decline in tensile strength and elongation at break of profiles. Achieve the effect of improving production efficiency

Inactive Publication Date: 2002-07-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase in mixing times when preparing nano-calcium carbonate masterbatch will also affect its performance. When it is used to produce PVC door and window profiles, the tensile strength and elongation at break of the profiles are both reduced by 26%.
Repeated mixing will reduce its performance and affect the quality and application effect of the masterbatch

Method used

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  • Method for preparing mother material from nano grade inorganic powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1, the composition (weight %) of nanometer calcium carbonate masterbatch:

[0014] (1) Nano calcium carbonate (particle size: 5-50nm) 60;

[0015] (2) Low melting point additives

[0016] (A) Low molecular weight polystyrene (molecular weight 1000~2000) 20;

[0017] (B) Oxidized polyethylene wax 1;

[0018] (3) Other additives: calcium stearate 4;

[0019] (4) Carrier resin: polyvinyl chloride 15;

[0020] 2. Melting compression temperature 100-110℃.

Embodiment 2

[0022] 1, the composition (weight %) of nanometer calcium carbonate masterbatch:

[0023] (1) Nano-calcium carbonate (particle size: 10-80nm) 70;

[0024] (2) Low melting point additives

[0025] (A) Low molecular weight polystyrene (molecular weight 1000~2000) 10;

[0026] (B) oxidized polyethylene wax 3;

[0027] (3) Other additives: zinc stearate 7;

[0028] (4) Carrier resin: polyvinyl chloride 10;

[0029] 2. Melting compression temperature 110-120℃.

[0030] This masterbatch is used to prepare polyvinyl chloride composite material (masterbatch accounts for 8% by weight), shows by the electron micrograph of sample (as shown in the accompanying drawing) that nano-calcium carbonate is well dispersed in polyvinyl chloride matrix.

Embodiment 3

[0032] 1, the composition (weight %) of nanometer calcium carbonate masterbatch:

[0033] (1) Nano-calcium carbonate (particle size: 5-50nm) 80;

[0034] (2) Low melting point additives

[0035] (A) Low molecular weight polystyrene (molecular weight 6000~10000) 10;

[0036] (B) polyethylene wax 0.5;

[0037] (C) stearic acid 1.5;

[0038] (3) Carrier resin: polyvinyl chloride 8;

[0039] 2. Melting compression temperature 120-140℃.

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Abstract

In method for preparing mother material, nano inorganic powder material, carrier resin and working adjuvant are used as raw material through extrusion process is characterized by that the inorganic powder material is 1-100 nano powder material, its weight is 50%-80% of that of mother material, the weight of low melting point working adjuvant is 12%-41% of that of mother material, and the weight of other adjuvant is 0-7% of that of mother material, and the weight of carrier resin is 8%-30% of that of mother material. Before extrusion the above0mentioned raw materials are pressed into the flake block in press equipment under the condition of greater than melting temp. of low melting point working adjuvant, then undergone the process of breaking treatment. said low melting point working adjuvant is at least one of low molecular weight polystyrene, polyethylene wax, oxidative polyethylene wax or stearic acid. Said method can obviously raise feeding speed for extrusion process, and can raise production efficiency.

Description

(1) Technical field [0001] The invention relates to a method for preparing a plastic masterbatch from nanoscale inorganic powder, in particular to a method for preparing the masterbatch by extrusion processing of nanoscale inorganic powder, carrier resin and processing aid as raw materials. (2) Background technology [0002] The technology of preparing composite materials through extrusion of inorganic powder and matrix resin has been very mature and widely used. In the preparation of composite materials, inorganic powders are often pre-prepared into masterbatches, and then added to the composite materials. The masterbatch preparation method of ordinary micron-sized powder is usually to mix or knead the micron-sized powder with additives and carrier resin, then add it into the extruder from the hopper, and prepare the masterbatch through extrusion processing. In order to solve the problem of difficulty in powder feeding, there is also a method of forced feeding. The compos...

Claims

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Application Information

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IPC IPC(8): C08K3/00C08K9/04C08L23/06C08L27/06
Inventor 陈建峰王国全曾晓飞
Owner BEIJING UNIV OF CHEM TECH