A polypropylene composite material with low vertical and horizontal color difference and its preparation method

A technology of vertical and horizontal color difference and composite materials, applied in the field of low vertical and horizontal color difference polypropylene composite materials and its preparation, can solve the problems of color difference, vertical and horizontal color inconsistency, etc., and achieve the effect of solving aging and improving heat resistance

Active Publication Date: 2022-03-11
上海聚威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

Polypropylene is a crystalline material, and the crystallization arrangement along the flow direction (longitudinal direction) and vertical flow direction (transverse direction) is different, resulting in inconsistent vertical and horizontal colors and color difference

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of described vertical and horizontal color difference improving agent is:

[0037] Step 1: Add bentonite to water for ultrasonic dispersion, the ultrasonic power is 100-300W, and the ultrasonic time is 10-20min;

[0038] Step 2: Then put the talc powder into the ball mill for ball milling, the ball milled through 10-30 mesh, then add the bentonite and talc powder into the step 1 according to the weight ratio of bentonite and talc powder at a weight ratio of 3:1, and continue to perform ultrasonication with a power of 500-1000W 25-35min, followed by washing and drying;

[0039] Step 3: Send the dried material of step 2 into a calciner for calcination, the calcination time is 5-15min, and the calcination temperature is 300-500°C; after the calcination is completed, a bentonite-talc powder composite is obtained;

[0040] Step 4: Send the bentonite-talc powder compound into a sodium hydroxide solution with a mass fraction of 1-3% and soak for 10-20 m...

Embodiment 1

[0054] A preparation of a polypropylene composite material with low longitudinal and lateral color difference, including the following components in parts by weight: 96 parts of copolymerized PP, 2 parts of maleic anhydride grafted polypropylene, 0.5 parts of 2,6-di-tert-butyl-p-cresol, 0.5 parts of calcium stearate and 1 part of carbon black;

[0055] The preparation process is as follows:

[0056] First add PP, talcum powder, maleic anhydride grafted polypropylene, 2,6-di-tert-butyl-p-cresol, calcium stearate, and carbon black into a high-speed mixer according to the above ratio and mix for 3 minutes at 40°C, then mix The uniformly mixed material is extruded and granulated with a twin-screw extruder. The temperature settings for each section of the extruder temperature are: 160°C, 180°C, 200°C, 220°C, 220°C, 220°C, 220°C, 210°C, 210°C, 200°C, and the screw speed is set at 180 rpm.

Embodiment 2

[0058] Preparation of a polypropylene composite material with low longitudinal and transverse color difference, including the following components in parts by weight: 86 parts of copolymerized PP, 10 parts of talc powder, 2 parts of maleic anhydride grafted polypropylene, 2,6 di-tert-butyl 0.5 part of cresol, 0.5 part of calcium stearate and 1 part of carbon black;

[0059] The preparation process is as follows:

[0060] First add PP, talcum powder, maleic anhydride grafted polypropylene, 2,6-di-tert-butyl-p-cresol, calcium stearate, and carbon black into the high-speed mixer according to the above ratio and mix for 3 minutes at 40°C, then The homogeneously mixed material is extruded and granulated with a twin-screw extruder. The temperature settings for each section of the extruder temperature are: 160°C, 180°C, 200°C, 220°C, 220°C, 220°C, 220°C, 210°C, 210°C, 200°C, and the screw speed is set at 180 rpm.

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Abstract

The invention discloses a polypropylene composite material with low vertical and horizontal color difference, comprising the following steps: 30-90 parts of PP, 10-60 parts of vertical and horizontal color difference improving agent, 2-5 parts of compatibilizing auxiliary agent, and 0.1-1 parts of antioxidant 0.1-0.5 parts of lubricant and 0.5-2 parts of toner. When the polypropylene of the present invention is injection-molded, the crystal grains are arranged differently due to the inconsistency of the vertical and horizontal flow modes, and the vertical and horizontal color difference improving agent can effectively improve the vertical and horizontal crystal grains to make them tend to be consistent.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polypropylene composite material with low vertical and horizontal color difference and a preparation method thereof. Background technique [0002] Polypropylene is the fastest growing variety of synthetic resins, widely used in daily necessities, electronic appliances, automobiles and other fields. [0003] Because of its excellent cost performance, it ranks first in the usage of non-metallic materials for vehicles. Polypropylene materials are often used as exterior parts of automobiles, so there are high requirements for the surface of polypropylene. Polypropylene is a crystalline material, and the crystallization arrangement along the flow direction (longitudinal direction) and vertical flow direction (transverse direction) is different, resulting in inconsistent vertical and horizontal colors and color difference. [0004] Chinese patent document CN110511483A dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L5/16C08L51/06C08K9/10C08K3/34C08K13/02C08K3/04C08K5/098C08K5/13
CPCC08L23/14C08L23/12C08L51/06C08K3/04C08K5/098C08K5/13C08K3/34C08K13/02C08L5/16C08K9/10
Inventor 王晶张天荣卜祥星牛志海王凯王明义
Owner 上海聚威新材料股份有限公司
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