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High-tensile-strength impact modifier for PVC (polyvinyl chloride) and preparation technique thereof

An impact modifier and high tensile strength technology, which is applied in the field of PVC impact modifier preparation, can solve the problems of poor weather resistance, low tensile strength, and limit the application and promotion of CPE, so as to improve weather resistance and processing performance effect

Active Publication Date: 2012-12-19
SHANDONG RUIFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the specific application process of CPE, there are disadvantages such as low tensile strength, narrow processing range, and poor weather resistance, which limit the application and promotion of CPE in PVC products.

Method used

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  • High-tensile-strength impact modifier for PVC (polyvinyl chloride) and preparation technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The high tensile strength impact modifier for PVC, the following parts by weight are based on 100 parts by weight of polyethylene, and its preparation process is as follows:

[0026] (1) Mix 2.0 parts by weight of glycidyl methacrylate, 0.5 parts by weight of styrene, 1.5 parts by weight of tert-butyl peroxybenzoate, and 0.3 parts by weight of dodecyl mercaptan to form a modified mixed system;

[0027] (2) Add the mixing system in step (1) and 100 parts by weight of HDPE into a high-speed mixer, set the speed at 3000r / min for mixing, wait until the temperature of the material rises to 85-90°C, discharge, dry and pulverize to 70-90 mesh, obtain glycidyl methacrylate modified polyethylene copolymer;

[0028] (3) Add 1000 parts by weight of 20wt.% hydrochloric acid solution, 100 parts by weight of glycidyl methacrylate modified polyethylene copolymer obtained in step (2), 1.5 parts by weight of polyvinyl alcohol, carbonic acid Calcium 5.0 parts by weight, then stir and di...

Embodiment 2

[0031] The high tensile strength impact modifier for PVC, the following parts by weight are based on 100 parts by weight of polyethylene, and its preparation process is as follows:

[0032] (1) Mix 1.0 parts by weight of glycidyl methacrylate, 1.0 parts by weight of methyl methacrylate, 1.0 parts by weight of dicumyl peroxide, and 0.2 parts by weight of dodecyl mercaptan to form a modified mixed system;

[0033] (2) Add the mixing system in step (1) and 100 parts by weight of HDPE into a high-speed mixer, set the speed at 3000r / min for mixing, wait until the temperature of the material rises to 85-90°C, discharge, dry and pulverize to 70-90 mesh, obtain glycidyl methacrylate modified polyethylene copolymer;

[0034] (3) Add 1000 parts by weight of 20wt.% hydrochloric acid solution, 100 parts by weight of glycidyl methacrylate modified polyethylene copolymer obtained in step (2), 1.4 parts by weight of hydroxypropyl methylcellulose to the chlorination kettle in sequence Parts ...

Embodiment 3

[0037] The high tensile strength impact modifier for PVC, the following parts by weight are based on 100 parts by weight of polyethylene, and its preparation process is as follows:

[0038](1) Mix 0.8 parts by weight of glycidyl methacrylate, 0.8 parts by weight of maleic anhydride, 0.5 parts by weight of dibenzoyl peroxide, and 0.08 parts by weight of dodecyl mercaptan to form a modified mixed system;

[0039] (2) Add the mixing system in step (1) and 100 parts by weight of HDPE into a high-speed mixer, set the speed at 3000r / min for mixing, wait until the temperature of the material rises to 85-90°C, discharge, dry and pulverize to 70-90 mesh, obtain glycidyl methacrylate modified polyethylene copolymer;

[0040] (3) Add 1000 parts by weight of 20wt.% hydrochloric acid solution, 100 parts by weight of glycidyl methacrylate modified polyethylene copolymer obtained in step (2), and 1.6 parts by weight of alkylphenol polyoxyethylene ether to the chlorination kettle. parts by w...

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Abstract

The invention belongs to the technical field of preparation of PVC (polyvinyl chloride) impact modifiers, and particularly relates to a high-tensile-strength impact modifier for PVC and a preparation technique thereof. The preparation technique comprises the following steps: grafting epoxypropyl methacrylate onto a polyethylene main chain in the presence of a grafting assistant, and carrying out chlorination modification by an acid-phase process to obtain the high-tensile-strength impact modifier for PVC. The impact modifier for PVC can be widely used in the fields of PVC profiles, tubes and plates, can be used instead of high-price acrylate impact modifiers in the aspects of shock resistance and tensile property, and greatly enhances the weather resistance and working properties of the PVC product. The invention satisfies the performance requirements for rigidity, weather resistance, dimensional stability and the like, and the production process is green and environment-friendly and is easy to control.

Description

technical field [0001] The invention belongs to the technical field of preparation of PVC impact modifiers, and in particular relates to a high tensile strength impact modifier for PVC and a preparation process thereof. Background technique [0002] High-density vinyl chloride (HDPE) is high-quality, cheap, easy to obtain, and has a wide range of uses. It is a thermoplastic polyolefin produced by ethylene copolymerization. Compared with LDPE and MDPE, it has better hardness and mechanical strength, better wear resistance, corrosion resistance and chemical stability, and is mainly used to manufacture containers, pipes, wires and cables, etc. However, high-density polyethylene is a non-polar polymer, and there are no branches on the molecular chain, the arrangement is regular, and it has a high density. Functional groups or polar components can expand its application field. Chemical modification is the main way of HDPE modification, mainly including graft modification, cross...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F220/32C08F8/22C08L51/06C08L27/06
Inventor 刘春信呼建强张振国唐晓明张海瑜
Owner SHANDONG RUIFENG CHEM
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