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Transparent polypropylene material with high heat resistance and cold resistance and preparation method thereof

A technology of transparent polypropylene and polypropylene materials, applied in the field of composite materials, can solve the problems of low transparency, easy to become brittle, easy to age, etc., and achieve the effects of good low temperature toughness and heat resistance, reasonable preparation method and improved production efficiency

Inactive Publication Date: 2014-07-09
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polypropylene is divided into copolymerized polypropylene and homopolymerized polypropylene. The material properties of the two different polymerization methods are quite different. Among them, homopolymerized polypropylene has the advantages of high transparency and strong rigidity, but at the same time it has poor toughness, size The disadvantages of poor stability, low temperature brittleness and easy aging limit its scope of application; while copolymerized polypropylene has the advantages of good heat resistance, good dimensional stability, good processability and good low temperature toughness, but many copolymerized polypropylene Propylene has disadvantages such as low transparency, low rigidity, etc.
[0005] At present, for many products that require high heat resistance and cold resistance, the pure raw material polypropylene cannot meet the requirements well, and it needs to be modified to combine the good properties of copolymerized polypropylene and homopolypropylene, so that Give full play to the greater advantages of polypropylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Stir and mix 2 parts of vinyltrimethoxysilane, 0.3 part of dicumyl peroxide (DCP), and 0.2 part of di-n-butyltin dilaurate to prepare a silane crosslinking agent;

[0048] Put 33 parts of copolymerized polypropylene, 65 parts of homopolypropylene, 2 parts of cold-resistant toughening agent SEBS, 0.25 parts of nucleating agent NA-11, 0.5 parts of antioxidant, and 0.6 parts of processing aid into temperature-controlled high-speed mixing Mix in the machine for 6 minutes, the temperature of the mixer is controlled at 80°C, and the rotation speed is 600r / min to obtain the premix;

[0049] Then feed the premixed material into the twin-screw extruder, preheat for 3 minutes, and then vacuumize, extrude, water-cool, pelletize, dry, and mix uniformly to obtain recycled materials for preparing automobile bumpers. The pre-melting zone of the extruder is 170°C, the first melting zone is 180°C, the first high-temperature shearing zone is 190°C, the second high-temperature shearing zo...

Embodiment 2

[0052] Stir and mix 1.5 parts of vinyltrimethoxysilane, 0.05 parts of dicumyl peroxide (DCP), and 0.05 parts of di-n-butyltin dilaurate to prepare a silane crosslinking agent;

[0053] Put 44 parts of copolymerized polypropylene, 50 parts of homopolypropylene, 6 parts of cold-resistant toughening agent SEBS, 0.15 parts of nucleating agent 3988, 0.56 parts of antioxidant, and 1.2 parts of processing aid into a temperature-controlled high-speed mixer Mix for 8 minutes, the temperature of the mixer is controlled at 75°C, and the rotation speed is 800r / min to obtain a premix;

[0054]Then feed the premixed material into the twin-screw extruder, preheat for 3 minutes, and then vacuumize, extrude, water-cool, pelletize, dry, and mix uniformly to obtain recycled materials for preparing automobile bumpers. The pre-melting zone of the extruder is 175°C, the first melting zone is 185°C, the first high-temperature shearing zone is 190°C, the second high-temperature shearing zone is 205°C...

Embodiment 3

[0056] Stir and mix 2.6 parts of vinyltrimethoxysilane, 0.2 part of dicumyl peroxide (DCP), and 0.1 part of di-n-butyltin dilaurate to prepare a silane crosslinking agent;

[0057] Put 47 parts of copolymerized polypropylene, 45 parts of homopolypropylene, 8 parts of cold-resistant toughening agent SEBS, 0.35 parts of nucleating agent TMB-4, 0.4 parts of antioxidant, and 0.8 parts of processing aid into temperature-controlled high-speed mixing Mix in the machine for 5 minutes, the temperature of the mixer is controlled at 80°C, and the rotation speed is 500r / min to obtain the premix;

[0058] Then feed the premixed material into the twin-screw extruder, preheat for 3 minutes, and then vacuumize, extrude, water-cool, pelletize, dry, and mix uniformly to obtain recycled materials for preparing automobile bumpers. The pre-melting zone of the extruder is 175°C, the first melting zone is 185°C, the first high-temperature shearing zone is 195°C, the second high-temperature shearing ...

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PUM

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Abstract

The invention relates to a transparent polypropylene material with high heat resistance and cold resistance and a preparation method thereof, wherein the material is prepared from co-polypropylene, homo-polypropylene, cold-resistant flexibilizer, cross-linking agent, nucleating agent, antioxidant and processing agent; and the total weight of the co-polypropylene, the homo-polypropylene and cold-resistant flexibilizer is 100 parts. The transparent polypropylene material with high heat resistance and cold resistance has favorable rigidity, low temperature toughness, heat resistance and favorable plastic light transmission; the light transmittance of the prepared product is up to more than 40%; and the hollow products prepared via injection molding and blow molding are good in forming, low in breakage rate and long in use time, and can be used for producing transparent hollow pots.

Description

[0001] technical field [0002] The invention belongs to the technical field of composite materials, and in particular relates to a transparent polypropylene material with high heat resistance and high cold resistance and a preparation method thereof. [0003] Background technique [0004] As the fastest-growing variety of general-purpose thermoplastics, polypropylene plays an increasingly important role in economic construction and people's lives, and is widely used in the automotive industry, household appliances, electronics, packaging, building materials, and furniture. Polypropylene is divided into copolymerized polypropylene and homopolymerized polypropylene. The material properties of the two different polymerization methods are quite different. Among them, homopolymerized polypropylene has the advantages of high transparency and strong rigidity, but at the same time it has poor toughness, size The disadvantages of poor stability, low temperature brittleness and easy...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/14C08L53/02C08K5/053C08K5/523C08K5/20C08K5/5425C08K5/14C08K5/57C08J3/24B29B9/06B29C47/92B29C48/92
CPCB29B9/12B29B7/46B29B7/72B29B7/7461B29B9/06B29C48/92B29C2948/92209B29C2948/92561B29C2948/9259B29C2948/92704B29C2948/92838C08L23/06B29C2948/9258C08L23/14C08L2201/08C08L2205/03C08L2205/24C08L2312/08C08L53/02C08K5/00C08K5/5425C08K5/14C08K5/57
Inventor 杨桂生康克琪
Owner HEFEI GENIUS NEW MATERIALS