Polypropylene composition and preparation method thereof

A polypropylene composition and technology of the composition, applied in the field of polypropylene composition and its preparation, can solve the problems of increasing impact resistance and spreading characteristics, and achieve the effect of excellent heat resistance and pressure resistance

Inactive Publication Date: 2014-01-22
大韩道恩高分子材料(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to previous experience, the decrease of α crystallization and the increase of β crystallization in polypr...

Method used

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  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (Production of ethylene-propylene random-elastic copolymer composition (C-1))

[0047] Temperature is 60 ℃, under the condition of pressure 7kg / cm2, in the reactor that is full of hydrocarbon solvent, inject propylene and ethylene monomer simultaneously, carry out polymerization reaction until the content ratio of ethylene and propylene is 2.8%: 97.2%, making melt index is 0.1g / 10min ethylene-propylene random copolymer.

[0048] Remove unreacted or low molecular weight by-products in the above. Then adjust the temperature in the reaction device to 52°C and the pressure to 3kgf / cm 2 The strip is injected with ethylene and propylene, and polymerized until the content ratio of ethylene and propylene reaches 50%:50% to produce ethylene-propylene elastic polymer. At this time, the relative weight ratio of the ethylene-propylene random copolymer and the ethylene-propylene elastic polymer was 98:2.

[0049] The reaction product was statically placed in a water tank at a tem...

example 2

[0053] (Production of ethylene-propylene random-elastic copolymer composition (C-2))

[0054] Temperature 60 ℃, under the condition of pressure 7kg / Cm , in the reactor that contains nucleophilic solvent, inject ethylene and propylene simultaneously, carry out polymerization reaction until the content ratio of ethylene and propylene is 2.5% by weight: 97.5% by weight, and melt index is made 0.4g / 10min ethylene-propylene random copolymer.

[0055] Remove unreacted or low molecular weight by-products in the above. Then adjust the temperature in the reaction device to 52°C and the pressure to 3kgf / cm 2 The strip is injected with ethylene and propylene, and polymerized until the content ratio of ethylene and propylene reaches 50%:50% to produce ethylene-propylene elastic polymer. At this time, the relative weight ratio of the ethylene-propylene random copolymer and the ethylene-propylene elastic polymer was 98:2.

[0056] The reaction product was statically placed in a water tan...

example 3

[0060] Production of Ethylene-Propylene Random Elastic Copolymer Composition (C-3))

[0061] Temperature 60 ℃, under the condition of pressure 7kg / cm2, inject ethylene and propylene simultaneously in the reactor that contains nucleophilic solvent, carry out usual polymerization reaction until the content ratio of ethylene and propylene is 2% by weight: 98% by weight, produced An ethylene-propylene random copolymer (A) having a melt index of 0.4 g / 10 min.

[0062] Remove the micro-reaction gas formed by the above-mentioned unreacted, the temperature in the reaction device is 52 ℃, and inject ethylene and propylene under the condition of pressure 3kgf / cm2, add polymerization reaction until the content ratio of ethylene and propylene reaches 50% by weight: 50% by weight An ethylene-propylene elastomeric polymer (B) is produced. At this time, the above-mentioned ethylene-propylene elastic polymer (B) production reaction adjusted the polymerization time so that the relative weight...

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Abstract

The invention discloses a polypropylene composition. The polypropylene composition includes an ethylene-propylene random elastic copolymer composition composed of an ethylene-propylene random copolymer with a melt index of 0.5 to 5 g/10 min and 0.5 to 10 wt% of ethylene and an ethylene-propylene elastic polymer with 25 to 75 wt% of ethylene and further includes a beta-crystal generating agent. The polypropylene composition has the characteristics of excellent impact resistance and overpressure resistance and is applicable to preparation of pipelines with the characteristics of improved flexibility, impact resistance at low temperature and overpressure resistance at high temperature.

Description

technical field [0001] The invention relates to a polypropylene composition with better impact resistance and pressure resistance and a preparation method thereof. Background technique [0002] In the past, pipes and hot water pipes were made of metal, but recently they are gradually replaced by cheap, hygienic and environmentally friendly plastics. Plastics are chemical resistant, freeze and have low thermal conductivity, thus having the advantage of preventing condensation and minimizing heat loss. [0003] Pipes are made of plastic materials with different physical properties due to different uses. For example, when making non-pressure pipes such as drainage pipes and sewer pipes, it is necessary to have excellent impact resistance and rigid plastic materials, and when making pressure pipes such as cold and warm water and heating, it is necessary to have excellent pressure resistance and impact resistance. Soft, low-rigidity plastic material. [0004] Recently, polypro...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/04C08K7/00C08K3/34C08F210/16
CPCC08L23/14C08F210/06C08F210/16C08L2203/18C08L2205/24C08L2308/00C08L23/16C08K7/26C08F210/02C08F2500/12
Inventor 赵德慧河贤洙于晓宁
Owner 大韩道恩高分子材料(上海)有限公司
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