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Process for preparing transparent polypropylene

A technology of transparent polypropylene and polypropylene, applied in the field of preparation of transparent polypropylene, can solve the problems such as the difficulty of dispersing the organic phosphate nucleating agent

Inactive Publication Date: 2007-11-14
贵州省材料技术创新基地
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem that the organophosphate nucleating agent is not easy to disperse, a compound system of silica sol and organophosphate was selected. The experiment proved that a good compound effect was obtained, and the nano-SiO 2 The particles and the organophosphate nucleating agent play an effective synergistic effect, which can further reduce the haze of PP and improve its transparency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Silica sol and organophosphate polypropylene nucleating transparent agent and polypropylene are mixed in a screw extruder at 160°C in a weight ratio of 0.15:0.1:100, extruded and pelletized, and the blended pellets are dried and then injected The sample is made on the machine, the haze of the sample is 51.9%, the yield strength is 36.9MPa, the bending strength is 56.5MPa, the bending modulus is 2.005GPa, and the impact strength is 2.378KJ / m 2 , the crystallization temperature is 129.86°C, and the heat distortion temperature is 151.95°C.

Embodiment 2

[0014] Silica sol and organophosphate polypropylene nucleating transparent agent and polypropylene are mixed in a screw extruder at 180°C in a weight ratio of 0.15:0.35:100, extruded and pelletized, and the blended pellets are dried and then injected The sample is made on the machine, the haze of the sample is 36.3%, the yield strength is 38.9MPa, the bending strength is 57.1MPa, the bending modulus is 1.983GPa, and the impact strength is 2.313KJ / m 2 , the crystallization temperature is 133.3°C, and the heat distortion temperature is 155°C.

Embodiment 3

[0016] The silica sol and the organophosphate-type polypropylene nucleating transparent agent and polypropylene are mixed at 230°C in a screw extruder at a weight ratio of 0.1:0.8:100, extruded and pelletized, and the blended pellets are dried and then injected The sample was made on the machine, the haze of the sample was 45.9%, the yield strength was 38.3MPa, the bending strength was 59.4MPa, the bending modulus was 1.995GPa, and the impact strength was 2.307KJ / m 2 , The crystallization temperature is 126.7°C. The heat distortion temperature is 160.95°C.

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Abstract

This invention relates to preparation method of a transparent polypropylene, which takes nano silicasol and organophosphate type polypropylene nucleating agent as materials. Mix the nanometer silicasol and organophosphate type polypropylene nucleating agent and polypropylene by weight ratio of 0.05- 1: 0.1- 1: 100 at 160 to 230deg C.

Description

technical field [0001] The invention relates to a method for preparing transparent polypropylene, in particular to a method for preparing transparent polypropylene by compounding nano-silica sol and an organophosphate-type polypropylene nucleating agent. 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. At present, the polypropylene nucleating and transparent agents sold in the market mainly include sorbitol, organic phosphate and rosin acid polypropylene nucleating agents, but they have disadvantages such as high price, peculiar smell, and poor dispersibility. Organic phosphate is an increasingly widely used polyolefin nucleating and transparent agent following dibenzylidene sorbitol and its derivatives. These products are mainly organophosp...

Claims

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Application Information

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IPC IPC(8): C08F110/06C08F2/38C08K5/49
Inventor 于杰张敏敏田瑶珠何敏张天水薛涛
Owner 贵州省材料技术创新基地
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