Combination of stabilizing agent in use for producing polyolefine resin

A technology of composition and stabilizer, which is applied in the field of polyolefin resin stabilizer composition, can solve the problems of easy blockage, short filter replacement cycle, affecting product production capacity, etc., and achieve good filter permeability and excellent stability and color protection ability, good thermal degradation effect

Inactive Publication Date: 2004-10-27
宁波金海雅宝化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bisphosphite auxiliary antioxidant AT-626 composition-AT-10 / AT-626 / calcium stearate provided by the inventor, although its processing stability is very remarkable, the color and luster is whiter, but the filter replacement cycle Short, easy to block the net, thus affecting the production capacity of the product

Method used

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  • Combination of stabilizing agent in use for producing polyolefine resin
  • Combination of stabilizing agent in use for producing polyolefine resin
  • Combination of stabilizing agent in use for producing polyolefine resin

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] Example 1: Processing stability test: After the stabilizer composition provided by the invention is mixed with the sample to be tested, it is sent into the TE-35 type 35mm twin-screw extruder with a screw length-to-diameter ratio of 28:1 through a hopper, The temperature distribution is shown in Table 1 for the initial extrusion. The screw speed was set at 60rpm, the measured outlet melt temperature was 224°C, and the head pressure was 1.7Mpa. The extrudate is pelletized after cooling in a water bath. The pellets were then cyclically extruded four times under cyclic extrusion process conditions. The temperature distribution is shown in multiple extrusion 1 in Table 1; the screw speed is set at 60 rpm, and the measured outlet melt temperature is 283°C. Head pressure 2.5-2.0Mpa. Melt index (MFR) was measured with SWO MeltfixerHT melt flow rate tester (2.16Kg / 230°C); yellowness index (YI) was measured with ZE 2000 yellowness index tester (2mm thick sheet). The test res...

example 2

[0032] Example 2: It is a comparative example of Example 1. The polypropylene composition is the same, except that 500ppm of calcium stearate is used instead of DHT-4A. The test results are shown in PW2 in Table 2.

example 3

[0033] Example 3: The process is the same as Example 1, polypropylene composition: Gx2225: 1500ppm; DHT-4A: 200ppm; base material: BOPP powder (F280S). See Gx in Table 2 for test results.

[0034]

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PUM

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Abstract

A composite stabilizer used for preparing the polyolefine resin contains hindered phenol as primary antioxidizing agent, phosphite as secondary antioxidizing agent and deacidifying agent.

Description

technical field [0001] The invention relates to a stabilizer composition, in particular to a polyolefin resin stabilizer composition. Background technique [0002] It is well known that polyolefin resin is easy to degrade during melt processing under high temperature and high shear force. After adding stabilizers such as antioxidants to stabilize it, it can inhibit degradation and ensure the stability of the product. At the same time, the color of the product can also be obtained. Significant improvement. Usually, a combination of various hindered phenol primary antioxidants / phosphite secondary antioxidants / acid scavenger compositions is used to ensure the stability of polyolefins in a molten state. For example, the AT-10 / AT-168 / calcium stearate stabilizer composition is used in polyolefin melt processing, although its stabilization effect is remarkable, but the color is not very white. The bisphosphite auxiliary antioxidant AT-626 composition-A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/521C08L23/00
Inventor 严光明
Owner 宁波金海雅宝化工有限公司
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