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Controllable degradation PVC composition and preparation method thereof

A technology of composition and mixture, which is applied in the processing and application of polymer materials, can solve the problems of destroying the soil environment, reducing the mechanical properties of materials, and affecting the rooting and growth of crops, so as to improve impact performance and tear resistance, and improve biological Degradability, effect of improving light transmittance and thermal insulation performance

Inactive Publication Date: 2018-12-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the analysis of the above patents, it is found that most of the methods to achieve degradation are by adding a certain amount of starch, but the addition of a large amount of starch not only greatly reduces the mechanical properties of the material, but also after degradation, the polymer plastics are still scattered in the soil in the form of flakes. , will seriously damage the soil environment and affect the rooting and growth of crops in the next season

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1. In parts by weight, 100 parts of 1200-type PVC resin, 5 parts of liquid calcium-zinc stabilizer 9700, 50 parts of trioctyl citrate, and 5 parts of nano-calcium carbonate are weighed in proportion and put into a high-speed mixer Stir and mix at high speed. When the temperature rises to 115°C, put the mixture in the high-speed mixer into a low-speed mixer to stir and cool. After the temperature drops to 45°C, release the material; 60 parts, 60 parts of polypropylene carbonate resins, 1 part of phosphite lipid antioxidant and take each component; Polypropylene carbonate resin molecular weight is 180,000;

[0028] Step 2. Add the weighed components together into the high-speed mixer and mix for 120s, and the released material is the composition dry mix;

[0029] Step 3. Add the mixed composition dry blend into a twin-screw extruder or a twin / single-screw extruder, melt, blend and extrude at a temperature of 150°C~165°C, and cut into Pellets are the compositions of ...

Embodiment 2

[0031]Step 1. In parts by weight, 100 parts of 1300-type PVC resin, 4.8 parts of liquid calcium zinc stabilizer 9700, 52 parts of trioctyl citrate, and 4.8 parts of nano-calcium carbonate are weighed in proportion and put into a high-speed mixer Stir and mix at a high speed. When the temperature rises to 112°C, put the mixture in the high-speed mixer into a low-speed mixer to stir and cool. After the temperature drops to 48°C, release the material. In percent by weight, each component is weighed according to 35 parts of polyvinyl chloride mixture, 65 parts of polypropylene carbonate resin, and 1.2 parts of phosphite antioxidant; the molecular weight of polypropylene carbonate resin is 150,000;

[0032] Step 2. Add the weighed components together into the high-speed mixer and mix for 110s, and the released material is the composition dry mix;

[0033] Step 3. Add the mixed composition dry blend into a twin-screw extruder or a twin / single-screw extruder, melt, blend and extrude ...

Embodiment 3

[0035] Step 1. In parts by weight, 100 parts of 1000-type PVC resin, 5.2 parts of liquid calcium zinc stabilizer 9700, 48 parts of trioctyl citrate, and 5.2 parts of nano-calcium carbonate are weighed in proportion and put into a high-speed mixer Stir and mix at a high speed. When the temperature rises to 118°C, put the mixture in the high-speed mixer into a low-speed mixer to stir and cool. After the temperature drops to 42°C, release the material. In percent by weight, each component is weighed according to 45 parts of polyvinyl chloride mixture, 55 parts of polypropylene carbonate resin, and 0.8 part of phosphite antioxidant; the molecular weight of polypropylene carbonate resin is 200,000;

[0036] Step 2. Add the weighed components together into the high-speed mixer and mix for 125s, and the released material is the composition dry mix;

[0037] Step 3. Add the mixed composition dry blend into a twin-screw extruder or a twin / single-screw extruder, melt, blend and extrude ...

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Abstract

The invention relates to a controllable degradation PVC composition and a preparation method thereof, and belongs to the field of processing and applications of polymer materials, wherein the raw materials comprise, by weight, 30-50 parts of a polyvinyl chloride mixture, 50-70 parts of a polypropylene carbonate resin, and 0-2 parts of an anti-oxidation anti-aging agent, the molecular weight of thepolypropylene carbonate resin is 100000-300000, the polyvinyl chloride mixture comprises polyvinyl chloride, a calcium-zinc stabilizer, a plasticizer and a reinforcing filler according to a mass ratio of 100:4.5-5.5:45-55:4.5-5.5, and the plasticizer is a citric acid ester plasticizer. During the preparation, the polyvinyl chloride mixture is first mixed, the polyvinyl chloride, the polypropylenecarbonate resin and the anti-oxidation anti-aging agent are mixed to form a composition mixture, and extruding is performed to obtain the product. According to the present invention, through the synergistic action and reasonable combination of various resins or auxiliary agents, the degradation of the PVC composition is achieved, and the composition has good thermal insulation performance and good biodegradability.

Description

technical field [0001] A controllable degradable PVC composition and a preparation method belong to the field of processing and application of polymer materials. Background technique [0002] With the development of the plastic industry, plastic products are more and more widely used. Among them, PVC is widely used in packaging, medical, chemical building materials, crop covering and other fields because of its cheap price, good flexibility, wide adaptability and large output. The film produced by PVC is also widely used in packaging and agricultural covering film. However, PVC resin products are difficult to degrade. These non-degradable PVC films, bags and other wastes remain in the soil and accumulate continuously, causing pollution to the soil and the environment. Traditional plastic waste treatment mainly involves recycling, burying, and incineration. These treatment methods are inefficient, consume a lot of energy, and incineration will produce a lot of toxic gases, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L27/06C08K13/02C08K5/11C08K3/26C08K5/524
CPCC08K2003/265C08K2201/011C08L69/00C08L2201/06C08L27/06C08K13/02C08K5/11C08K3/26C08K5/524
Inventor 刘容德王晶张新华李静刘浩张桦王晓敏桂俊杰孙培培
Owner CHINA PETROLEUM & CHEM CORP
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