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Stabilizing agent composition in use for producing polyolefine resin

A technology for processing stabilizers and polyolefin resins, which is applied in the field of processing stabilizer compositions for polyolefin resins, can solve the problems of easy blockage, affecting product production capacity, short filter replacement cycle, etc., and achieve good filter permeability , excellent stability and color protection, good resistance to thermal degradation

Inactive Publication Date: 2006-04-26
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 that the present inventor has provided---AT-10 / AT-626 / calcium stearate, although its processing stability is very remarkable, and color and luster is more pure and white, but filter replacement The cycle is short and the network is easy to be blocked, thus affecting the production capacity of the product

Method used

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  • Stabilizing agent composition in use for producing polyolefine resin
  • Stabilizing agent composition in use for producing polyolefine resin
  • Stabilizing agent composition in use for producing polyolefine resin

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] 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 Meltfixer HT melt flow rate tester (2.16Kg / 230°C); yellowness index (YI) was measured with ZE 2000 yellowness index tester (2mm thick sheet). See PW1 in ...

example 2

[0036]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

[0037] 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.

[0038]

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Abstract

The invention discloses a polyolefin resin stabilizer composition, which comprises 10-80% of hindered phenol main antioxidant; 10-80% of phosphite auxiliary antioxidant; and 5-50% of acid scavenger. The stabilizer composition provided by the invention not only greatly improves the stability, and the color of the obtained product is white, but also greatly prolongs the replacement cycle of the filter net.

Description

technical field [0001] The invention relates to a stabilizer composition, in particular to a processing stabilizer composition for polyolefin resins. 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-62...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/00C08K5/13C08K5/524C08L23/00C08K5/521
Inventor 严光明
Owner 宁波金海雅宝化工有限公司
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