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Polypropylene composite material with high elongation at break and scratch resistance and preparation method thereof

A composite material, polypropylene technology, applied in the field of modified polymer materials, can solve the problems of poor scratch resistance, reduced elongation at break, low surface hardness of polypropylene, etc., to improve the scratch resistance effect, improve the Scratch resistance, the effect of improving elongation at break

Pending Publication Date: 2021-12-07
滁州格美特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypropylene also has some disadvantages, such as: large shrinkage, poor scratch resistance, low melting point, poor dimensional stability, etc., which restrict its application as an engineering stress material.
[0003] Polypropylene has low surface hardness and poor scratch resistance. Generally, when it is used in automotive interiors, home appliance casings and other products, it is necessary to add a scratch-resistant agent to improve the scratch-resistant performance of the material. However, the addition of traditional scratch-resistant agents It will reduce the elongation at break of the material, thus affecting the application of scratch-resistant polypropylene in some fields. The reason is that traditional scratch-resistant agents have internal lubrication in the matrix, resulting in the force between polypropylene molecular chains Weakened, it is easy to slip and break when it is stressed, so the impact strength and elongation at break of polypropylene modified products added with scratch resistance agent are very low

Method used

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  • Polypropylene composite material with high elongation at break and scratch resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 87.4 parts of polypropylene PP K7227H (Wuhan ethylene), 6 parts of toughening agent POE 8137 (Dow Chemical), 3 parts of ultra-high molecular weight polyethylene Lupolen UHM 5000 (Basel), anti-scratch agent AntiScratch 100 (Degus Sai) 3 parts, lubricant A-C540 (Honeywell) 0.3 part, antioxidant 1010 (BASF) 0.1 part, antioxidant 168 (BASF) 0.2 part, placed in a high-speed mixer and mixed for 2 minutes to obtain a uniform dispersion The mixture, wherein, the speed of the high-speed mixer is 520rpm; The uniformly dispersed mixture obtained in the above steps is extruded and granulated by a twin-screw extruder with a length-to-diameter ratio of 48:1, and the twin-screw extruder The temperature of the machine from the feeding section to the machine head is 170°C, 195°C, 195°C, 200°C, 200°C, 200°C, 195°C, 195°C, 195°C, 200°C, and the feeding speed is 40rpm. The speed is 560rpm. That is a high elongation at break, scratch-resistant polypropylene composite material.

Embodiment 2

[0018] Weigh 88.4 parts of polypropylene PP K7726H (Yanshan Petrochemical), 4 parts of toughening agent POE 8200 (Dow Chemical), 3 parts of ultra-high molecular weight polyethylene UHMWPE 240M (Mitsui Chemicals), 3 parts of anti-scratch agent LYSI-306 (Chengdu Si Like) 4 parts, lubricant A-C540 (Honeywell) 0.3 part, antioxidant 1010 (Shandong Sanfeng) 0.1 part, antioxidant 168 (Shandong Sanfeng) 0.2 part and mix in a high-speed mixer 3min to obtain a uniformly dispersed mixture, wherein the speed of the high-speed mixer is 480rpm; the uniformly dispersed mixture obtained in the above steps is extruded and granulated by a twin-screw extruder with a length-to-diameter ratio of 46:1. The temperature of the screw extruder from the feeding section to the machine head is 170°C, 195°C, 195°C, 200°C, 200°C, 200°C, 195°C, 195°C, 195°C, 200°C, and the feeding speed is 35rpm , The extrusion speed is 580rpm. That is, a high elongation at break and scratch-resistant polypropylene composit...

Embodiment 3

[0020] Weigh 87.5 parts of polypropylene PP BX3800 (Korea SK), 5 parts of toughening agent POE 8842 (Dow Chemical), 4 parts of ultra-high molecular weight polyethylene UHMWPE HL5010 (Formosa Plastics Chemical), and scratch-resistant agent LYSI-306 (Chengdu Silike) 3 parts, lubricant BS-2818 (Zhongshan Huamingtai Chemical Industry) 0.2 parts, antioxidant 168 (Shandong Sanfeng) 0.1 part, antioxidant 0.2 parts UV-3808PP5 (Swiss Ciba) in high speed Mix in a mixer for 3 minutes to obtain a uniformly dispersed mixture, wherein the speed of the high-speed mixer is 560 rpm; the uniformly dispersed mixture obtained in the above steps is extruded through a twin-screw extruder with an aspect ratio of 42:1 For granulation, the temperature of the twin-screw extruder from the feeding section to the head is 170°C, 195°C, 195°C, 200°C, 200°C, 200°C, 195°C, 195°C, 195°C, 200°C. The material rotation speed was 45 rpm and the extrusion rotation speed was 580 rpm. That is, a high elongation at b...

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Abstract

The invention discloses a polypropylene composite material with high elongation at break and scratch resistance and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 79.2-95.6 parts of polypropylene, 2-5 parts of ultra-high molecular weight polyethylene, 2-5 parts of a scratch-resistant agent, 0.2-0.4 part of a lubricant and 0.2-0.4 part of a processing aid, wherein the ultra-high molecular weight polyethylene is branched-chain-free linear high-density polyethylene with the weight-average molecular weight larger than 1,500,000. The composite material further comprises 4-10 parts of a toughening agent. The invention also discloses a preparation method of the polypropylene composite material with high elongation at break and scratch resistance. According to the invention, macromolecular silicone is used as the scratch-resistant agent, and the ultra-high molecular weight polyethylene and the flexibilizer are matched to improve the scratch resistance of the material and improve the elongation at break of the material.

Description

technical field [0001] The invention belongs to the technical field of modified polymer materials, and in particular relates to a high elongation at break, scratch-resistant polypropylene composite material and a preparation method thereof. Background technique [0002] As a general-purpose plastic, polypropylene has the characteristics of good chemical stability, high crystallinity, easy processing, and low production cost. Therefore, polypropylene has a wide range of applications in household appliances, daily necessities packaging materials, and the automotive industry. application. However, polypropylene also has some disadvantages, such as: large shrinkage, poor scratch resistance, low melting point, poor dimensional stability, etc., which restrict its application as an engineering stress material. [0003] Polypropylene has low surface hardness and poor scratch resistance. Generally, when it is used in automotive interiors, home appliance casings and other products, i...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/06C08L23/08C08L83/04
CPCC08L23/12C08L2207/068C08L23/06C08L23/0815C08L83/04
Inventor 徐光钰杨桂生计娉婷张明志龚国欢王登攀商红彬
Owner 滁州格美特科技有限公司
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