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High-strength polypropylene composition and preparation method thereof

A technology of polypropylene composition and polypropylene, which is applied in the field of dynamic vulcanization to prepare the above-mentioned composition and high-strength polypropylene composition. Prospect of industrialization, reduce the degree of degradation, ensure stable effect

Inactive Publication Date: 2013-04-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is known from the prior art that in the process of realizing rubber toughened polypropylene through dynamic vulcanization, both sulfur and peroxide are effective crosslinking agents, but commonly used peroxide crosslinking agents such as DCP etc. , easy to degrade PP, break the PP chain, and reduce the overall performance of the blend
Choosing sulfur as the crosslinking agent is also prone to overvulcanization of rubber, resulting in a decrease in the performance of the material

Method used

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  • High-strength polypropylene composition and preparation method thereof
  • High-strength polypropylene composition and preparation method thereof
  • High-strength polypropylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Preparation of modified powdered styrene-butadiene rubber: Add 1kg of water and 3kg of carboxylated styrene-butadiene latex into a 15L coagulation kettle, feed low-pressure steam, heat the slurry to 55°C, stir and mix for 3min; add 60g of release agent and mix 3min; then add 2kg of unvulcanized powdered styrene-butadiene rubber 1500a and mix for 40min; stop stirring and discharge, centrifugal dehydration, and dry at 50°C for 24hrs to make modified powdered styrene-butadiene rubber.

[0053] (2) Preparation of polypropylene composition: first put 0.004kg TBHP and 0.01kg acetone solvent into a beaker and mix them; put 0.06kg carboxylated styrene-butadiene latex and 0.02kg sulfur into a beaker and mix them for 3 minutes, then pour them into Mix together for 3 minutes; put the mixed solution, 0.2kg modified powdered styrene-butadiene rubber 1500a, and 0.002kg BMI-MP into a high-speed mixer and mix at high speed for 5 minutes to make a premixed masterbatch;

[0054] Mix ...

Embodiment 2

[0056] (1) Preparation of modified powdered styrene-butadiene rubber: Add 1kg of water and 3kg of carboxylated styrene-butadiene latex into a 15L coagulation kettle, feed low-pressure steam, heat the slurry to 55°C, stir and mix for 3 minutes; add 70g of release agent and mix 3min; then add 2kg of unvulcanized powdered styrene-butadiene rubber 1500b and mix for 30min; stop stirring and discharge, centrifugal dehydration, and dry at 50°C for 24hrs to make modified powdered styrene-butadiene rubber.

[0057] (2) Preparation of polypropylene composition: first put 0.005kg TBHP and 0.01kg acetone solvent into a beaker and mix; put 0.1kg carboxylated styrene-butadiene latex and 0.03kg sulfur into a beaker and mix for 3 minutes, then pour the two into Mix together for 3 minutes; put the mixed solution, 0.3kg modified powdered styrene-butadiene rubber 1500b, and 0.003kg BMI-MP into a high-speed mixer and mix at high speed for 5 minutes to make a premixed masterbatch;

[0058] Mix the...

Embodiment 3

[0060] (1) Preparation of modified powdered styrene-butadiene rubber: Add 1kg of water and 3kg of carboxylated styrene-butadiene latex into a 15L coagulation kettle, feed low-pressure steam, heat the slurry to 55°C, stir and mix for 3 minutes; add 80g of release agent and mix 3min; then add 2kg of powdered styrene-butadiene rubber 1712a and mix for 30min; stop stirring and discharge, centrifugal dehydration, and dry at 50°C for 24hrs to produce modified powdered styrene-butadiene rubber.

[0061] (2) Preparation of polypropylene composition: first put 0.003kg TAHP and 0.01kg toluene solvent into a beaker and mix them; put 0.08kg carboxylated styrene-butadiene latex and 0.027kg sulfur into a beaker and mix them for 3 minutes, then pour them into Mix together for 3 minutes; put the mixed solution, 0.35kg modified powdered styrene-butadiene rubber 1712a, and 0.003kg BMI-MP into a high-speed mixer and mix at high speed for 5 minutes to make a premixed masterbatch;

[0062] Mix the...

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Abstract

The invention discloses a high-strength polypropylene (PP) composition which comprises the following components based on the mass of the PP being 100%: 100 percent of PP matrix, 1.0-3.0 percent of crosslinking agent comprising 0.95-2.5 percent of organic peroxide / sulphur mixture and 0.05-0.5 percent of assistant crosslinking agent which are in a weight ratio of 1:5-1:10, 10-30 percent of carboxylic butadiene-styrene latex modified powder butadiene styrene rubber and 2-5 percent of polar monomer graft PP, wherein 1.0-3.0 percent of crosslinking agent comprises 0.95-2.5 percent of organic peroxide / sulphur mixture and 0.05-0.5 percent of assistant crosslinking agent and the mass ratio of organic peroxide to sulphur is 1:5-1:10. A specific crosslinking system is selected and is matched with other components, so that the degradation of PP in a mixing system can be effectively controlled, the properly crosslinked powder rubber is maximally, stably and uniformly dispersed in PP in a fine particle form, and finally the high-strength PP composition is obtained. The invention further provides a method for preparing the high-strength PP composition through dynamic vulcanization.

Description

technical field [0001] The invention relates to a polypropylene resin modification technology, in particular to a rubber-toughened high-strength polypropylene composition and a method for preparing the composition through dynamic vulcanization. Background technique [0002] The high performance of polypropylene (PP) is a subject of concern, among which PP toughening is an important research direction for high performance. Using resin post-processing modification technology, PP toughening can be achieved by blending with rubber and thermoplastic elastomers. The rubber varieties used as toughening modification in the prior art include ethylene-propylene rubber (such as: US4983647, Showa 730145, ZL200410011367.X, etc.), styrene-butadiene rubber (ZL200310103222.8, US6150442, ZL200510002252.9, ZL01110737.5), etc. Wait. Nitrile rubber (CN01110732.4), etc. [0003] In 1962, since A.M.Gessler of the United States first proposed to prepare rubber-plastic blends (US3037954) by dyna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L9/06C08L13/02C08L51/06C08K13/02C08K5/14C08K3/06B29C47/92B29B9/06B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 徐典宏龚光碧韩燕刘俊保杨茹欣何颖翟云芳王月霞魏绪玲梁天珍
Owner PETROCHINA CO LTD
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