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A kind of preparation method of low volatile resin

A low-volatility resin technology, applied in the field of low-volatility resin preparation, can solve the problems of high volatile component content, complex process, high cost, etc., and achieve good melt fluidity, simple process and low production cost Effect

Active Publication Date: 2020-11-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a method for preparing a low-volatile resin, which solves the problems of high volatile component content, heavy odor, and complex process and high cost of existing low-emission type pipeline resin special materials in current polyolefin resin materials.

Method used

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  • A kind of preparation method of low volatile resin
  • A kind of preparation method of low volatile resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0075] Prepare according to the following formula:

[0076] 1) 97 parts by mass of polyethylene

[0077] 2) 0.9 parts by mass of deionized water

[0078] 3) Surfactant (polyoxyethylene 20 oleyl ether) 0.1 parts by mass

[0079] 4) Antioxidant 1010 2.0ppm parts by mass

[0080] First with the certain high-density polyethylene powder identical with embodiment 1 impurity removal, deblocking by 12kg / h processing capacity, with low molecular weight auxiliary agent (water, deionized water), antioxidant by the above-mentioned formula proportioning, Mix for 5 minutes at a speed of 300 rpm with a high mixer to obtain a premix. The detected total carbon value of the powder is 82.5μgC / g sample, in figure 1 In the extruder shown, the premixed material is added through the feeding port, the first-stage exhaust port is enabled, and the gauge pressure of the exhaust port is -0.04MPaG. Special materials for pipes. In this example, the temperature of the cooling water tank is 25-30°C, th...

Embodiment 3

[0095] Prepare according to the following formula:

[0096] 1) 97 parts by mass of polyethylene

[0097] 2) 0.9 parts by mass of deionized water

[0098] 3) Surfactant (polyoxyethylene 20 oleyl ether / polyoxyethylene lauryl ether / nonanol polyethylene glycol ether) 0.1 parts by mass (ratio 3:1:1)

[0099] 4) Antioxidant 1076 2.0ppm parts by mass

[0100] After removing impurities and blocks from a certain high-density polyethylene powder, mix low-molecular-weight additives (water, deionized water) and antioxidants according to the above formula through a high-speed mixer according to the processing capacity of 17kg / h. figure 1 In the vented extruder with the structure shown, it is added through the feeding funnel. After being mixed in the pre-mixing section, it enters the exhaust section, and the gauge pressure of the primary exhaust port is controlled to -0.03MPaG, and the gauge pressure of the secondary exhaust port is -0.06MPaG to exhaust, extrude and granulate to obtain l...

Embodiment 4

[0115] Prepare according to the following formula:

[0116]

[0117] First remove impurities and blocks from a certain linear low density polyethylene powder, and then add it together with antioxidants according to the above formula at a processing rate of 14kg / h. figure 1 For the vented screw extruder shown, after mixing the surfactant and deionized water with a premixer, add the first-level liquid injection port and the second-level liquid injection port at a ratio of 6:4, and the melt is pre-mixed After mixing in the first section, enter the exhaust section, control the gauge pressure of the primary exhaust port to -0.03MPaG, and the gauge pressure of the secondary exhaust port to -0.05MPaG to exhaust, extrude, and granulate to obtain a pipeline with low volatile content. material. After testing, the total carbon value of the raw material powder is 124.9 μgC / g sample. In this example, the temperature of the cooling water tank is 25-30°C, the rotational speed of the pel...

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Abstract

The invention relates to a preparation method of a low-volatile resin. The preparation method comprises the following steps: adding a mixture of polyethylene powder, deionized water and a low-molecular-weight assistant into a screw extruder, mixing and dissolving in a closed high-temperature screw cylinder, extruding and granulating. By adopting an extrusion devolatilization method, the removal ofmicromolecular volatile matters can be enhanced, and a prepared resin is low in volatile gas content and weak in smell, and has relatively good impact resistance, strength and toughness.

Description

technical field [0001] The invention relates to a preparation method of low volatile resin. Background technique [0002] During the polyolefin extrusion molding process, often because the raw materials contain too much water, gas or various volatile substances such as monomers, oligomers, solvents, etc., the volatile components of the molded products are too high, and It causes defects such as dull surface, dents, and bubbles inside the product, which seriously affects the quality of the product. Excessive content of volatile components in polyolefin products not only has an important impact on product quality, but also has an important impact on post-system safety and environmental protection. The national environmental protection standards are becoming more and more stringent, but the existing devolatilization technology is far from meeting the requirements, and the support of new technologies is urgently needed. [0003] At present, there are mainly the following four ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L71/02C08K5/134C08K5/13C08K5/372B29B9/06B29C48/76
CPCB29B9/06C08L23/06C08L2205/025C08L2205/035C08L71/02C08K5/1345C08K5/13C08K5/372
Inventor 黄正梁徐磊孙婧元杨遥廖祖维王靖岱蒋斌波阳永荣韩国栋吴文清叶天洲张池金盛涛叶健冯艺荣王杰任想马玉龙
Owner ZHEJIANG UNIV
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