Toughening modifying agent for transparent polyvinyl chloride product and high-transparency polyvinyl chloride mixture

A technology of toughening modifier and polyvinyl chloride, which is applied in the field of polyvinyl chloride, can solve the problems of poor weather resistance, poor toughness, easy precipitation and transparency, etc., to improve tear resistance, improve toughness, and good transparency Effect

Inactive Publication Date: 2017-01-25
SHANDONG RIKE CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The first technical problem to be solved by the present invention is: obtain a kind of Toughening modifier for transparent polyvinyl chloride products. Transparent PVC products modified with this toughening modifier have high light transmittance, good weather resistance and good toughness without precipitation, thus solving the problem of Solved the problems of poor weather resistance, poor toughness and easy precipitation of MBS products in the prior art and poor transparency of general CPE products

Method used

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  • Toughening modifying agent for transparent polyvinyl chloride product and high-transparency polyvinyl chloride mixture
  • Toughening modifying agent for transparent polyvinyl chloride product and high-transparency polyvinyl chloride mixture
  • Toughening modifying agent for transparent polyvinyl chloride product and high-transparency polyvinyl chloride mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add 0.6 parts of methyl methacrylate / acrylic acid copolymer dissolved in water as a dispersant, and 0.18 parts of polyoxyethylene lauryl ether as an emulsifier into a 24-cubic reactor equipped with a stirring paddle , then add water so that the total water consumption and all auxiliary raw materials are 300 parts, and then add 27.5 parts with a number average molecular weight (Mn) of 22,000, a molecular weight distribution (Mw / Mn) of 2.9, and a particle size of D 50 It is 170 micron high-density polyethylene. Under stirring conditions, after the temperature of the reaction material rises to 78°C, 10 parts of chlorine gas is introduced, and the speed of chlorine flow is maintained at 10 parts per hour, and then the temperature is raised to 123°C, the heating time is 1 hour, and the heating and chlorine gas flow are carried out at the same time. After the reaction temperature reaches 123°C, keep the temperature above 123°C, and feed the remaining 16 parts of chlorine gas a...

Embodiment 2

[0058] In a 24-cubic reactor equipped with a stirring paddle, add 0.1 part of methyl methacrylate / acrylic acid copolymer as a dispersant, 0.05 part of an initiator, and add water so that the total water consumption and all auxiliary raw materials are 250 parts , then add 30 parts of sample 1, after the temperature of the reaction material is raised to 80°C under stirring, then add 4 parts of butyl acrylate and 4 parts of methyl methacrylate, keep the temperature at 80-85°C, and react 3 Hours later, it was cooled to below 40° C., centrifuged and dried to obtain a rubber powder (sample 2) with an elongation of 1524%, a hardness of 55.4, and a tensile strength of 9.8 MPa. The conversion rate of the reaction was 99.4%, and the particle size of the powder was 260 microns.

Embodiment 3

[0060] Add 0.65 parts of water-soluble methyl methacrylate / acrylic acid copolymer to a 24-cubic reactor equipped with a stirring paddle as a dispersant, and add 0.20 parts of polyoxyethylene lauryl ether as an emulsifier , then add water so that the total water consumption and all auxiliary raw materials are 300 parts, and then add 30 parts with a number average molecular weight (Mn) of 21,000, a molecular weight distribution (Mw / Mn) of 2.5, and a particle size of D 50 It is 160-micron high-density polyethylene. Under stirring conditions, after the temperature of the reaction material rises to 82°C, 15 parts of chlorine gas is introduced, and the speed of chlorine flow is maintained at 15 parts per hour, and then the temperature is raised to 122°C, the heating time is 1 hour, and the heating and chlorine gas flow are carried out at the same time. After the reaction temperature reaches 122°C, keep the temperature above 122°C, and feed the remaining 18 parts of chlorine gas at a ...

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Abstract

The invention discloses a toughening modifying agent for a transparent polyvinyl chloride (PVC) product and a high-transparency polyvinyl chloride mixture. The toughening modifying agent is selected from chlorinated polyethylene or a copolymer of the chlorinated polyethylene and (methyl) alkyl acrylate or a mixture of the chlorinated polyethylene and a (methyl) alkyl acrylate polymer; the grain diameter D50 of the chlorinated polyethylene is smaller than 20 microns, the number-average molecular weight Mn is smaller than 25000 and the molecular weight distribution is more than or equal to 2.0 and smaller than or equal to 3.5; the polyvinyl chloride mixture is prepared from: (a) 100 parts of polyvinyl chloride resin; (b) 3 to 15 parts of the toughening modifying agent; (c) 0.5 to 5 parts of a stabilizer; (d) 0 to 10 parts of a PVC product machining auxiliary agent; (e) 0 to 10 parts of an anti-impact modifying agent; (f) 0 to 5 parts of a lubricant; (g) 0 to 10 parts of a plasticizer. The toughening modifying agent provided by the invention is used for modifying the PVC product and the obtained product has high light transmittance, good weather resistance and good toughness.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride, in particular to a modifier for transparent polyvinyl chloride products and a polyvinyl chloride mixture. Background technique [0002] Polyvinyl chloride has the characteristics of flame retardancy, chemical resistance, high mechanical strength and good electrical insulation. However, polyvinyl chloride also has the following disadvantages: 1. Poor processability; 2. Poor low temperature impact toughness; 3. Thermal stability 4. Poor impact strength at low temperature. In the later stage, people invented a variety of methods to improve PVC products to improve the shortcomings of PVC. For example, people invented processing aids to improve the processing performance of PVC; invented impact modifiers to improve the low-temperature impact properties of PVC; A heat stabilizer was invented to improve the thermal stability of PVC, and a low-temperature toughener with high elongation at bre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F8/22C08F220/18C08F220/14C08L27/06C08L23/28C08L33/08C08L33/12
CPCC08F8/22C08F220/14C08F220/18C08F220/1804C08L27/06C08L2201/10C08F110/02C08L23/286C08L33/08C08L33/12
Inventor 赵东日路恩斌徐峰刘孝阳
Owner SHANDONG RIKE CHEM
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