Chlorinated high polymer with good heat stability and preparation method thereof

A technology of thermal stability and high polymer, applied in the field of chlorinated high polymer and its preparation, can solve the problems of heat resistance and poor light aging performance, and achieve the effects of low manufacturing cost, environmental protection and high purity

Inactive Publication Date: 2012-08-22
程贤甦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVC and chlorinated polyethylene are often used as outdoor materials, but their heat resistance and light aging performance are poor, and free radicals will be generated under the action of heat and light to undergo dehydrochlorination reaction. Therefore, the addition of lignin can effectively capture free radicals and improve Light and heat stability of PVC or chlorinated polyethylene

Method used

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  • Chlorinated high polymer with good heat stability and preparation method thereof
  • Chlorinated high polymer with good heat stability and preparation method thereof
  • Chlorinated high polymer with good heat stability and preparation method thereof

Examples

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preparation example Construction

[0023] The preparation process of chlorinated high polymer materials with good thermal stability: PVC or chlorinated polyethylene powder is pre-dried at 100°C for 20-24 hours, first 100 parts of PVC or chlorinated polyethylene powder, 5-25 parts of solvent-based Lignin and appropriate amount of other processing aids are weighed according to the formula, put into a high-speed mixer and pre-mixed at high speed for 5-10 minutes, then add a certain amount of plasticizer and mix again at high speed. After mixing, the mixed material is placed on a double-roller mill for mixing, and the temperature of the double-rollers of the mill is 140-150°C. After mixing evenly, take out the tablet. The sheet is cut into the size of the inner cavity of a standard tableting mold, and the mold is preheated on a flat vulcanizing machine at a temperature of 150-160°C for 5-15 minutes. Then put the sheet into the mold and preheat for 5-15 minutes. Then pressurize to 12-15MPa, keep the pressure for 1...

Embodiment 1

[0028] Example 1. Adding high-boiling alcohol lignin as heat-stabilizing modifier for PVC

[0029] PVC powder was pre-dried at 100°C for 24h, weighed 200g of PVC powder, 20g of high boiling alcohol lignin dried at 80°C for 24h, 4g of calcium-zinc stabilizer, 40g of dibutyl phthalate Put the plasticizer into the high-speed mixer and pre-mix at high speed for 8 minutes. After mixing, put the mixed material on the double-roll mill for mixing. The temperature of the double-roll of the mill is 140°C. After mixing evenly, take out the tablet. The sheet was cut into the size of the inner cavity of a standard sheeting mold, and the mold was preheated on a flat vulcanizing machine at a temperature of 160°C for 5 minutes. Then put the sheet into the mold and preheat for 5min. Then pressurize to 15MPa, keep the pressure for 2 minutes, and deflate, repeat this three times; finally keep the pressure for 3 minutes, take out the mold and carry out cold pressing for 10 minutes. Finally,...

Embodiment 2

[0030] Example 2. Adding enzymatic lignin as thermal stability modifier for polyvinyl chloride

[0031] PVC powder is pre-dried at 100°C for 24 hours, weighed 200 grams of PVC powder, 30 grams of enzymatic lignin dried at 80°C for 24 hours, 4 grams of calcium-zinc stabilizer, and 40 grams of dibutyl phthalate plasticized Put the agent into the high-speed mixer and pre-mix at high speed for 8 min. After mixing, the mixed material was placed on a double-roll mill for mixing, and the temperature of the double-roll of the mill was 140° C. After mixing evenly, take out the tablet. The sheet was cut into the size of the inner cavity of a standard sheeting mold, and the mold was preheated on a flat vulcanizing machine at a temperature of 160°C for 5 minutes. Then put the sheet into the mold and preheat for 5min. Then pressurize to 15MPa, keep the pressure for 3 minutes, and deflate, repeat this three times; finally keep the pressure for 3 minutes, take out the mold and carry out ...

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Abstract

The invention discloses a chlorinated high polymer with good heat stability and a preparation method thereof. The chlorinated high polymer with good heat stability is prepared by mixing solvent lignin or derivatives of the solvent lignin which serves or serve as additives with high polymers such as polrvinyl chloride and chlorinated polyethylene which contain chlorine atoms in high polymer chain sections. The lignin additives used by the method come from natural high polymers without causing environment pollution and have low cost. The prepared chlorinated high polymer composite material has good heat-resistant stability. The lignin additives are suitable for Polymer processing technologies such as hot pressing or plastic extrusion. Renewable resources can be fully utilized, and consumption of petroleum chemicals can be reduced, thereby having remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the field of new material development and preparation, and more specifically relates to a chlorinated high polymer with good thermal stability and a preparation method thereof. Background technique [0002] Chlorinated polymers are polymers containing chlorine atoms in the polymer chain segment, such as polyvinyl chloride, chlorinated polyethylene, etc. are very commonly used polymer materials. Polyvinyl chloride (PVC) is a polymer polymerized from vinyl chloride monomer. It has the advantages of flame retardancy, weather resistance, corrosion resistance, water and chemical corrosion resistance, good comprehensive mechanical properties and electrical insulation properties. The disadvantages are Thermal stability and impact resistance are poor. Chlorinated polyethylene is a polymer produced by chlorinated substitution reaction of polyethylene. According to different physical properties and uses, chlorinated polyethylene can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/28C08L97/00C08L75/04C08L63/00C08K5/098C08K5/12C08K5/092C08H7/00
Inventor 程贤甦
Owner 程贤甦
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