Transparent polypropylene and preparing method thereof

A technology of transparent polypropylene and polypropylene, applied in the field of transparent polypropylene and its preparation, can solve the problems of poor dispersion, high price, and poor anti-reflection effect.

Active Publication Date: 2013-04-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages are high price, limited compatibility with resin, poor dis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Bis(3,4-dimethyldibenzyl)sorbitol, methylenebis(2,4-di-tert-butylphenyl)aluminum phosphate, tetrakis[-β(3,5-di-tert-butyl- 4-hydroxyphenyl propionic acid)] pentaerythritol, tris (2,4-di-tert-butyl) phenyl phosphite, calcium stearate, monoglyceric acid stearate, hydroxyl-terminated butadiene in a weight ratio of 0.15: 0.05∶0.05∶0.1∶0.05∶0.05∶0.05 pre-mixed, then mixed with 100 parts of polypropylene, then extruded and pelletized by twin-screw extruder at 160°C-240°C, the pellets were dried and made on an injection machine Spline, the haze of the sample is 32.3%, the tensile strength is 28.5MPa, the flexural modulus is 1018MPa, the impact strength is 29.8J / m, and the heat distortion temperature is 85°C.

Embodiment 2

[0038]Bis(3,4-dimethyldibenzyl)sorbitol, methylenebis(2,4-di-tert-butylphenyl)aluminum phosphate, tetrakis[-β(3,5-di-tert-butyl- 4-hydroxyphenyl propionic acid)] pentaerythritol, tris (2,4-di-tert-butyl) phenyl phosphite, calcium stearate, monoglyceric acid stearate, hydroxyl-terminated butadiene in a weight ratio of 0.15: 0.05∶0.05∶0.1∶0.05∶0.05∶0.1 After pre-mixing, mix with 100 parts of polypropylene, then extrude and pelletize with twin-screw extruder at 160℃~240℃, dry the pellets and make them on the injection machine Spline, the haze of the sample is 31.1%, the tensile strength is 28.8MPa, the flexural modulus is 1030MPa, the impact strength is 30.2J / m, and the heat distortion temperature is 86°C.

Embodiment 3

[0040] Bis(3,4-dimethyldibenzyl)sorbitol, methylenebis(2,4-di-tert-butylphenyl)aluminum phosphate, tetrakis[-β(3,5-di-tert-butyl- 4-hydroxyphenylpropionic acid)] pentaerythritol, tris(2,4-di-tert-butyl)phenyl phosphite, calcium stearate, monoglyceric acid stearate, hydroxyl-terminated polybutadiene by weight ratio 0.15 : 0.05: 0.05: 0.1: 0.05: 0.05: 0.15 After pre-mixing, it is mixed with 100 parts of polypropylene, and then extruded and granulated with a twin-screw extruder at 160°C to 240°C. After the pellets are dried, they are produced on an injection machine Splined, the haze of the sample is 28.5%, the tensile strength is 28.2MPa, the flexural modulus is 1058MPa, the impact strength is 30.1J / M, and the heat distortion temperature is 88°C.

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Abstract

The invention relates to transparent polypropylene, which is prepared from the following raw materials by weight part: 100 parts of polypropylene, 0.1-0.4 parts of nucleating agent, 0.1-0.2 parts of antioxidant, 0.05-0.2 parts of acid-acceptor, 0.05-0.1 parts of lubricant and 0.05-0.15 parts of dispersant, wherein the nucleating agent is prepared by compounding a phosphate transparent agent with a sorbitol transparent agent, and the weight ratio of the phosphate transparent agent to the sorbitol transparent agent is 0.1 to 100. The preparation method of the transparent polypropylene comprises the following steps: premixing the nucleating agent, the antioxidant, the acid-acceptor, the lubricant and the dispersant, and then extruding the premixed material and the polypropylene at the temperature of 160-240 DEG C to be pelletized.

Description

technical field [0001] The invention relates to a transparent polypropylene and a preparation method thereof, in particular to a preparation method for preparing transparent polypropylene by compounding sorbitol and organic phosphate transparent agents. Background technique [0002] Polypropylene is a kind of translucent crystalline plastic with excellent performance, cheap price, wide application and translucence. The transparency of polypropylene can be improved by adding nucleating agent to obtain transparent polypropylene plastic. In order to achieve better transparency, most of the existing transparent polypropylene plastics use random copolymerized polypropylene as the base resin, and add sorbitol-based transparent agents, but because the rigidity of random copolymerized polypropylene is worse than that of homopolypropylene , and although the sorbitol-based transparent agent has a good anti-reflection effect, its rigidity enhancement effect is limited, resulting in the...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L15/00C08K13/02C08K5/053C08K5/527C08K5/098C08K3/26B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/92704B29C2948/92895
Inventor 姜凯黄强张凤波娄立娟卢晓英王艳芳陈商涛黄伟欢吴林美
Owner PETROCHINA CO LTD
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