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Master batch for preparing special polyethylene resin for tubular product

A technology of polyethylene resin and master batch, which is applied in the field of preparing master batch of polyethylene resin for pipes, can solve the problem that the light aging resistance is difficult to reach the same level of PE pipes, and achieve the effect of improving the light aging resistance.

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

AI Technical Summary

Problems solved by technology

[0003] The invention provides a masterbatch for preparing polyethylene resin for pipes, which can be used to manufacture non-black pipes whose coloring agent is permanent orange G or phthalocyanine blue. By adopting an improved combined light stabilizer, Solve the technical problem that the light aging resistance of non-black PE pipes is difficult to reach the same level as that of black PE pipes

Method used

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  • Master batch for preparing special polyethylene resin for tubular product
  • Master batch for preparing special polyethylene resin for tubular product
  • Master batch for preparing special polyethylene resin for tubular product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8

[0023] 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.

[0024] Above-mentioned additive comprises antioxidant, light stabilizer I and light stabilizer II, wherein:

[0025] Antioxidant is B225 antioxidant; Light stabilizer I is 2'-(2'-hydroxyl-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole; Light stabilizer II is N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)hexanediamine.

[0026] See Table 1 for the proportioning of each component of the additive and the addition amount of the addit...

Embodiment 9～16、 comparative example 4～6

[0035] 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.

[0036] 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).

[0037] 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 provides a master batch for preparing special polyethylene resin for a tubular product. The master batch is a composite, and is prepared by fusing and mixing carrier polyethylene resin, a coloring agent and an annexing agent. The coloring agent is fast orange G or phthalocyanine blue; and the annexing agent comprises antioxygen B225, a light stabilizer I 2'-(2'-oxhydryl-3'-tertiary butyl-5'-methyl phenyl)-5-chlorobenzotriazole and a light stabilizer IIN, N'-bi-(2,2,6,6-tetramethyl-4-piperidyl) hexamethylenediamine. The content of the coloring agent in the master batch is 1-5wt%, and the content of the annexing agent in the master batch is 15-50wt%. According to the master batch for preparing the special polyethylene resin for the tubular product provided by the invention, the light aging resistance of the PE (poly ethylene) material can be obviously improved on the premise that the use level of the annexing agent is not increased, and the special material for the black PE tubular product can be compared to carry out the aging test, so that almost the same aging resistance can be showed.

Description

technical field [0001] The invention relates to a masterbatch for preparing polyethylene resins for pipes, in particular to a masterbatch for preparing polyethylene resins for pipes in which the coloring agent 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, drainage, agricultural irrigation, and fine particl...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K5/3475C08K5/3435C08J3/22
Inventor 陈国康孙旭辉王荣和沈峰明
Owner CHINA PETROLEUM & CHEM CORP