Polyvinyl chloride (PVC) mixture with high elongation at break

A technology of elongation at break and polyvinyl chloride, which is applied in the fields of polyvinyl chloride mixture with excellent weather resistance, processing performance, high elongation and toughness, can solve the problem that PVC products are prone to nail cracking, poor processing performance, low temperature toughness Problems not solved, etc.

Active Publication Date: 2012-08-15
SHANDONG RIKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, polyvinyl chloride (PVC) resin has the following disadvantages: 1. Poor processability; 2. Poor low temperature impact strength; 3. Poor thermal stability; 4. Poor low temperature toughness
People have invented a variety of methods to improve the shortcomings of PVC, for example: people have invented processing aids to improve the processing performance of PVC; invented impact modifiers to improve the low temperature impact performance of PVC; invented heat stabilizers to improve PVC thermal stability, but the low temperature toughness of PVC has not been resolved
The reason why PVC products are difficult to replace wood is because PVC products are prone to nail cracking
Secondly, the reason why PVC doors and windows are prone to weld fillet cracking is also because of the low elongation at break and poor toughness of PVC.
[0003] For a long time, there has been a big misunderstanding in the field of PVC modification. It is mistakenly believed that the notched impact

Method used

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  • Polyvinyl chloride (PVC) mixture with high elongation at break

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In the reactor of 30 liters that stirring paddle is equipped with, add 0.25 parts of methyl methacrylate / acrylic acid copolymers that dissolve into water as dispersant, add the polyoxyethylene lauryl ether of 0.24 parts as emulsifier, Then add water, so that the total water consumption and all auxiliary raw materials are 250 parts, then add 30 parts of high-density polyethylene, after stirring the temperature of the reaction material rises to 80 ° C, start to feed 18 parts of chlorine gas, The speed is kept at 18 parts / hour, and then the temperature is raised to 135°C while the chlorine gas is passed, and the heating time is one hour. The temperature rises and the chlorine gas is carried out at the same time. Parts of speed is passed into remaining 18 parts of chlorine. Then keep the temperature between 135-138 DEG C and react for 3 hours, cool to below 40 DEG C, centrifuge and dry to obtain rubber powder (sample 1) with elongation at break of 1140%.

[0046] The conve...

Embodiment 2

[0049] Add water, 0.1 part of polymethyl methacrylate / acrylic acid copolymer dispersant, 0.05 part of initiator in a 30-liter reactor equipped with a stirring paddle, and use the total water consumption and all auxiliary raw materials to be 250 parts , and then add 30 parts of sample (1), after stirring the temperature of the reaction material to 80 ° C, then add 5 parts of butyl acrylate and 1 part of methyl methacrylate, keep the temperature at 80 to 85 ° C, and react After 3 hours, it was cooled to below 40° C., centrifuged, and dried to obtain a rubber powder (sample 2) with an elongation at break of 1260%.

[0050] The conversion rate of the reaction was 99.3%, and the particle size of the powder was 310 microns.

[0051] The preparation method of PVC mixture and PVC sheet product is the same as embodiment 1.

Embodiment 3

[0053] In the reactor of 30 liters that stirring paddle is equipped with, add 0.25 parts of methyl methacrylate / acrylic acid copolymers that dissolve into water as dispersant, add the polyoxyethylene lauryl ether of 0.24 parts as emulsifier, Then add water, so that the total water consumption and all auxiliary raw materials are 250 parts, then add 30 parts of high-density polyethylene, after stirring the temperature of the reaction material rises to 90 ° C, start to feed 18 parts of chlorine gas, The speed is kept at 18 parts / hour, and then the temperature is raised to 140°C while passing chlorine gas, and the heating time is 1 hour. Parts of speed is passed into remaining 18 parts of chlorine. Then keep the temperature between 138-142° C. and react for 3 hours, cool to below 40° C., centrifuge, and dry to obtain rubber powder (sample 3) with an elongation at break of 1320%.

[0054] The conversion rate of the reaction was 99.2%, and the particle size of the powder was 340 mi...

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Abstract

The invention provides a polyvinyl chloride (PVC) mixture which comprises the following components in parts by weight: (a) 100 parts of PVC resin, (b) 5-30 parts of low-temperature toughening modifier, (c) 0.5-5 parts of stabilizer, (d) 0-50 parts of filler, (e) 0-50 parts of wood meal, (f) 0-10 parts of acrylic polymer, (g) 0-20 parts of anti-shock modifier, (h) 0-5 parts of lubricant and (i) 0-10 parts of pigment. The low-temperature toughening modifier is rubber powder of which the elongation at break is 1000-1600% and the weight percent of chlorine is at least 10%. The elongation at break of the PVC mixture is greatly enhanced, thereby basically overcoming the defect of low elongation at break of the PVC product, greatly widening the application range of PVC and enhancing the industrial competitive power of PVC.

Description

technical field [0001] The invention relates to a polyvinyl chloride mixture, in particular to a polyvinyl chloride mixture with high elongation and excellent toughness, processability and weather resistance. Background technique [0002] Generally speaking, polyvinyl chloride (PVC) resin has the following disadvantages: 1. Poor processability; 2. Poor low-temperature impact strength; 3. Poor thermal stability; 4. Poor low-temperature toughness. People have invented a variety of methods to improve the shortcomings of PVC, for example: people have invented processing aids to improve the processing performance of PVC; invented impact modifiers to improve the low temperature impact performance of PVC; invented heat stabilizers to improve PVC thermal stability, but the low temperature toughness of PVC has not been resolved. The toughness of PVC has become a major obstacle to the development of PVC. For example, in the field of water supply pipes, PVC pipes are gradually replace...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L97/02C08L33/04C08L23/28C08L51/06C08F10/02C08F8/22C08F255/02
Inventor 赵东日
Owner SHANDONG RIKE CHEM
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