Method for preparing polypropylene with high-melt-strength by modifying T30s through acetone solvent method

A technology with high melt strength and acetone solvent, which is applied in the field of production of polypropylene modified special materials, can solve the problems of low impact strength and achieve the effects of high product quality, high melt strength and high yield

Inactive Publication Date: 2013-09-18
陕西省轻工业研究设计院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the notched impact strength is lower than ordinary polypropylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for preparing high-temperature-resistant (>105°C) flame-retardant cable compound by blending modified CPE / ethylene-propylene rubber. The production steps are:

[0016] A kind of acetone solvent method modification T30s prepares the method for high-melt strength polypropylene, and its production step is:

[0017] In the first step, start the twin-screw extruder, feed 95 parts of dried polypropylene T30s evenly from the hopper, the screw speed is 200 rpm, and the heating temperature is 180°C.

[0018] In the second step, the mass ratio of 1 part of vinyl long-chain unsaturated silane and 4 parts of acetone are miscible, and pumped from the third heating module of the extruder by a metering pump;

[0019] The third step is to mix 0.5 part of (di)benzoyl peroxide (dissolved in 100 parts of acetone) evenly, and pump it in from the second heating module of the extruder by the metering pump; adjust the screw speed, feeding rate, metering pump liquid The flow rate is ...

Embodiment 2

[0023] A kind of acetone solvent method modification T30s prepares the method for high-melt strength polypropylene, and its production step is:

[0024] The first step is to start the twin-screw extruder, and feed 98 parts of dry polypropylene T30s evenly from the hopper, the screw speed is 200-400 rpm, and the heating temperature is 200°C.

[0025] In the second step, the mass ratio of 3 parts of vinyl long-chain unsaturated silane and 4-10 parts of acetone is miscible, and it is pumped in from the third heating module of the extruder by a metering pump;

[0026] The third step is to mix 2 parts of (di)benzoyl peroxide (dissolved in 100 parts of acetone) evenly, and pump it from the second heating module of the extruder through the metering pump; adjust the screw speed, feeding rate, metering pump liquid The flow rate is to make the polypropylene T30s, vinyl long-chain unsaturated silane acetone solution, and (di)benzoyl acetone peroxide react completely at the same time, and...

Embodiment 3

[0030] A kind of acetone solvent method modification T30s prepares the method for high-melt strength polypropylene, and its production step is:

[0031] In the first step, start the twin-screw extruder, feed 97 parts of dried polypropylene T30s evenly from the hopper, the screw speed is 300 rpm, and the heating temperature is 190°C.

[0032] In the second step, the mass ratio of 2 parts of vinyl long-chain unsaturated silane and 4-10 parts of acetone is miscible, and it is pumped in from the third heating module of the extruder by a metering pump;

[0033] The third step is to mix 1 part of (di)benzoyl peroxide (dissolved in 100 parts of acetone) evenly, and pump it in from the second heating module of the extruder by the metering pump; adjust the screw speed, feeding rate, metering pump liquid The flow rate is to make the polypropylene T30s, vinyl long-chain unsaturated silane acetone solution, and (di)benzoyl acetone peroxide react completely at the same time, and the aceton...

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Abstract

The invention discloses a method for preparing polypropylene with high-melt-strength by modifying T30s through acetone solvent method. Acetone dissolvent ethylene long-chain unsaturated silane and oxidation (II) benzoyl are added in a reaction system by a metering pump. As the polypropylene with high-melt-strength is prepared by utilizing the acetone dissolvent ethylene long-chain unsaturated silane and the oxidation (II) benzoyl to modify T30s, the reaction is even and stable, and the product has high quality and good stability. The preparation method has the characteristics of low cost, low energy consumption, high yield and high melt strength.

Description

technical field [0001] The invention belongs to the technical field of production of special materials for polypropylene modification, and in particular relates to a method for dissolving vinyl long-chain unsaturated silane in acetone and oxidizing (di)benzoyl-modified T30s to prepare high-melt-strength polypropylene. Background technique [0002] HMSPP is a polypropylene resin containing long-chain branches, which are grafted after polymerization. The melt strength of this homopolymer is 9 times that of ordinary polypropylene homopolymers with similar flow characteristics. When the density and melt flow rate are similar, the yield strength, flexural modulus, heat distortion temperature and melting point of HMSPP are higher than those of ordinary polypropylene. But the notched impact strength is lower than ordinary polypropylene. [0003] HMSPP special resin solves the difficult problem of ordinary polypropylene thermoforming, and can form thin-walled containers with large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/911B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 杨金明刘旭汤粤豫王波田小艳郑健钧
Owner 陕西省轻工业研究设计院
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