Method for preparing special polyethylene resin composition for pipe by master batch method

A technology of polyethylene resin and composition, which is applied in the field of preparation of polyethylene resin composition for manufacturing pipes, can solve the problem that the light aging resistance of non-black PE pipes cannot reach the same level, and achieve obvious positive effects and improved light aging resistance Effect

Inactive Publication Date: 2013-04-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a method for preparing a special polyethylene resin composition for pipes by a masterbatch method. The prepared polyethylene resin composition can be used to manufacture non-black pipes whose coloring agent i

Method used

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  • Method for preparing special polyethylene resin composition for pipe by master batch method
  • Method for preparing special polyethylene resin composition for pipe by master batch method
  • Method for preparing special polyethylene resin composition for pipe by master batch method

Examples

Experimental program
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Effect test

Embodiment 1～8

[0025] Take the PE resin with a melt flow rate of 18-22g / 10min as the carrier, add the colorant permanent orange G and the components of the additive according to the required proportion, and mix well. The materials are put into the twin-screw extruder for melt mixing and granulation. The residence time of the material in the screw is 2-4 minutes, and the temperature of the screw is controlled at 160-200°C. The obtained masterbatch particles are finished products after being cooled and dried, and 500kg samples are prepared for each embodiment.

[0026] Above-mentioned additive comprises antioxidant, light stabilizer I and light stabilizer II, wherein:

[0027] Antioxidant is B225 antioxidant,

[0028] Light stabilizer I is 2'-(2'-hydroxyl-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole,

[0029] Light stabilizer II is N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)hexanediamine.

[0030] See Table 1 for the proportioning of each component of the additive and the addition ...

Embodiment 9～16、 comparative example 4～6

[0039] Take the masterbatches prepared in Examples 1-8 and Comparative Examples 1-3, and use the conventional masterbatch method to manufacture the special PE resin for pipes.

[0040] Take 500kg of PE resin base material, the PE resin base material is bimodal molecular weight distribution polyethylene, its density is 0.920-0.965g / mL, and the melt flow rate under the load 5kg test condition is 0.2-0.5g / 10min. The weight average molecular weight Mw of the low molecular weight part L 20000-22000, the weight average molecular weight Mw of the high molecular weight part H 250,000 to 280,000, the weight ratio W of the low molecular weight part to the high molecular weight part L :W H It is 1: (1.2~1.4).

[0041] Calculate the required amount of masterbatch according to the required content of the colorant permanent orange G and additives in the PE resin specially used for pipes, mix the required amount of masterbatch and PE base material, and put them into the twin-screw extrude...

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Abstract

The invention discloses a method for preparing a special polyethylene resin composition for a pipe by a master batch method, which comprises the following steps of: 1) mixing polyethylene resin serving as a carrier, a coloring agent and an additive and stirring uniformly; and performing melting mixing granulation by a twin-screw extruder to obtain master batch, wherein the coloring agent is permanent orange G or phthalocyanine blue; the coloring agent comprises an antioxidant B225, a light stabilizer 2'-(2'-hydroxy-3'-tertiary butyl-5'-methylphenyl)-5-chlorobenzotriazole and N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylene diamine; the amount of the coloring agent is 1-5% by weight; and the amount of the additive is 15-50% by weight; and 2) proportionally mixing the master batch and the resin base material and stirring uniformly, and performing melting mixing granulation by a screw extruder to obtain a product of polyethylene resin composition, wherein the content of the coloring agent is 0.02-0.10% by weight, and the content of the additive is 0.3-1.0% by weight. Through the invention, the light aging resistance of the prepared polyethylene material is obviously improved.

Description

technical field [0001] The invention relates to a preparation method of a special polyethylene resin composition for making pipes, in particular to a preparation method of a special polyethylene resin composition for making pipes in which the coloring agent used is permanent orange G or phthalocyanine blue. Background technique [0002] With the deepening of the development and utilization of plastic pipes and the continuous improvement of production technology, the application fields of plastic pipes are becoming wider and wider. Its excellent chemical corrosion resistance and increasingly perfect mechanical properties are generally recognized by people. Plastic pipes are no longer simple. Based on the price advantage, it is used as a substitute for metal pipes. Among them, the development of polyethylene (PE) pipes is very rapid. The early PE pipes were mainly used for the transportation of liquid media or solid media under low pressure conditions, such as sewage discharge...

Claims

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Application Information

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IPC IPC(8): C08J3/22C08L23/06C08K5/3475C08K5/3435B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 孙旭辉王荣和陈国康黄伟东吴建东闵丽华
Owner CHINA PETROLEUM & CHEM CORP
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