Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A preparing method of chlorinated polyethylene

A technology of chlorinated polyethylene and high-density polyethylene, applied in the field of plastic products, can solve the problems of product performance gap, carbon tetrachloride residue, limited application field, etc.

Inactive Publication Date: 2017-09-26
河北泰纳新材料科技有限公司
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The other is the solvent method technology, which is a homogeneous reaction after dissolving in carbon tetrachloride solution and introducing chlorine gas. The chlorination reaction is balanced, easy to control, and relatively stable in weight, but carbon tetrachloride enters the atmosphere during the production process. , has great damage to the ozone layer, and the finished product has carbon tetrachloride residue
[0004] In the prior art, the applicable fields of chlorinated polyethylene products are limited, because the properties of rubber and plastics are different, and the performance index requirements for chlorinated polyethylene itself are also different. The chlorinated polyethylene used in rubber requires low Mooney viscosity, High elongation, plastics require good processability of chlorinated polyethylene, there is a big difference between the raw materials used and the process formula, resulting in a significant gap in performance between the products used by the two

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A preparing method of chlorinated polyethylene
  • A preparing method of chlorinated polyethylene

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The embodiment of the present invention discloses a preparation method of chlorinated polyethylene, which includes the following steps: step a) under stirring conditions, add high-density polyethylene powder into 600-1000 parts by weight of hydrochloric acid solution, add 1-5 parts by weight Surfactant, heat up to 50-60°C and stir for 10-30 minutes; step b) add 1-3 parts by weight of sodium polymethacrylate and 0.5-1.8 parts by weight of sodium tripolyphosphate to the product obtained in step a, and peroxide 0.4-1.2 parts by weight of benzoyl, stirring, continue to heat up to 65-70°C; step c) pass chlorine gas into the mixture obtained in step b to carry out chlorination reaction, continue to heat up to 120-140°C to stop the reaction, and control the reaction pressure 0.4-0.45MPa, and then deacidification by filtration, neutralization, centrifugal dehydration, and drying to obtain chlorinated polyethylene.

[0019] As a preferred version, the mass concentration of the h...

Embodiment 1

[0028] 1. Prepare 800Kg of hydrochloric acid solution with a concentration of 22%, slowly start stirring, add 100Kg of high-density polyethylene powder, add 1 Kg of surfactant, heat up to 55°C and stir for 20 minutes, and perform surface pretreatment on the polyethylene powder to improve its Active, the surfactant is sodium dodecylbenzenesulfonate;

[0029] 2. Then add 1.3Kg of sodium polymethacrylate, 0.98Kg of sodium tripolyphosphate, and 0.6Kg of benzoyl peroxide, stir and mix thoroughly, and then continue to heat up.

[0030] 3. Raise the temperature to 65°C, start to feed chlorine gas into the reactor for chlorination reaction, continuously raise the temperature to 130°C to stop the reaction, control the pressure of the reactor to 0.4-0.45MPa, and feed 60Kg of chlorine gas at 65-110°C for 2- For 3 hours, 60Kg of chlorine gas is introduced at 110-130°C for 2-3 hours;

[0031] 4. After the chlorination is completed, the modified chlorinated polyethylene is obtained through...

Embodiment 2-4

[0033] Adopt the preparation method of embodiment 1, the quality of sodium dodecylbenzenesulfonate is respectively 2Kg, 3Kg, 4Kg;

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A preparing method of chlorinated polyethylene is provided. The method includes, under stirring, adding high-density polyethylene powder into a hydrochloric acid solution, adding a surfactant into the mixture, heating the mixture to 50-60 DEG C, stirring the mixture for 10-30 min, then adding sodium polymethacrylate, sodium tripolyphosphate and benzoyl peroxide, stirring the mixture, heating the mixture to 65-70 DEG C, feeding chlorine to perform a chlorination reaction, continuously heating the mixture, then terminating the reaction, controlling reaction pressure, and performing filtration for acid removing, neutralization, centrifugal dehydration and drying to obtain the chlorinated polyethylene. Compared with the prior art, the surfactant is utilized to modify the high-density polyethylene powder in the method, and the chlorinated polyethylene can have low Mooney viscosity and a high elongation through ratio adjustment and can be applied in the rubber and plastic fields so that the application range of chlorinated polyethylene modified products is wider. Process water used in production is recycled and zero emission of water is achieved largely so that the method is energy-saving and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of plastic products, in particular to a preparation method of chlorinated polyethylene. Background technique [0002] Chlorinated polyethylene is a chlorine-containing polymer produced by chlorination of polyethylene. It has saturated molecular chains, stable chemical properties, non-toxic, odorless, and harmless to the environment. It is mainly used as coatings, inks, and adhesives. Chlorinated polyethylene is dissolved in toluene, xylene and higher alcohols, and the coating prepared by its solution has excellent chemical resistance and salt spray resistance, and has high adhesion to substrates such as steel and cement, and is an ideal anti-corrosion material. Membrane substances are widely used in heavy anti-corrosion coatings, containers and architectural anti-corrosion coatings. [0003] There are many kinds of preparation techniques for chlorinated polyethylene: one is solid-phase method technology, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L23/28C08L33/02C08K3/32C08F8/22C08F110/02
CPCC08L23/286C08F8/22C08F2800/20C08K2003/324C08L33/02C08K3/32C08F110/02
Inventor 张保发刘国会张立华
Owner 河北泰纳新材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com