Degradable colored polyvinyl chloride composition and preparation method thereof

A technology of polyvinyl chloride and composition, applied in the field of degradable colored polyvinyl chloride composition and preparation thereof, can solve the problems of insufficient strength of PVC material, uncontrollable degradation speed, environmental pollution, etc., and achieves rapid degradability, hygiene and safety The effect of degradability, stable coloring performance

Inactive Publication Date: 2021-06-04
张玉花
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Medical waste belongs to the first category of hazardous waste. Discarded disposable medical PVC products are usually buried with other solid waste; the experimental research of the European Vinyl Products Committee has proved that waste PVC products are not easy to decompose, and there will be a certain amount of waste in the landfill process. A large number of plasticizers and stabilizers are released into the soil, causing pollution to the environment; the existing technology usually uses modified starch, corn fiber, etc. to accelerate the degradation of plastics, but the addition of thes...

Method used

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  • Degradable colored polyvinyl chloride composition and preparation method thereof
  • Degradable colored polyvinyl chloride composition and preparation method thereof
  • Degradable colored polyvinyl chloride composition and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Preparation of polyvinyl chloride macromolecular chain transfer agent.

[0032] In a 50 mL branched flask, add RAFT reagent 4-cyano-4-(thiobenzoic acid) valeric acid (4.0 mmol) and 20 mL of anhydrous tetrahydrofuran THF, heat up to 70 ° C, dropwise add SOCl 2 (4.0mmol), dropwise completed reaction 2h, decompression distillation removes SOCl 2 and THF to obtain 4-cyano-4-(thiobenzoic acid) valeryl chloride, and add an appropriate amount of toluene to dissolve it.

[0033] N 2 Under protection, add single-terminal hydroxyl polyvinyl chloride PVC-OH (1.0mmol) into a 50ml Schlenk bottle, add 30ml of anhydrous toluene, heat up to 70°C, inject 1ml of pyridine after the PVC-OH is completely dissolved, and stir for 30min , add the above-mentioned 4-cyano-4-(thiobenzoic acid) valeric acid chloride product dropwise, raise the temperature to 75°C and continue the reaction for 2h, after two cycles of continuous dissolution / precipitation in toluene / methanol, dry under vacuum at 45...

Embodiment 2

[0035] Preparation of degradable polyvinyl chloride block copolymers.

[0036] Add methacrylic acid (10.0mmol), polyvinyl chloride macromolecular chain transfer agent (0.1mmol), azobisisobutyronitrile (0.01mmol) into a 50ml Schlenk bottle, N 2 Under protection, add 20mL N,N-dimethylformamide, react at 60°C for 8h, put the product into liquid nitrogen to quench the reaction to stop the reaction, use methanol / water as the precipitant, repeat the precipitation 3 times, vacuum 45 Dry at ℃ to constant weight to obtain a degradable polyvinyl chloride block copolymer with a yield of 76.3%.

Embodiment 3

[0038] Preparation of colored polyvinyl chloride block copolymers.

[0039] Add colorant (10.0mmol), polyvinyl chloride macromolecular chain transfer agent (0.1mmol), azobisisobutyronitrile (0.01mmol) into a 50ml Schlenk bottle, N 2 Under protection, add 20mL N,N-dimethylformamide, react at 60°C for 8h, put the product into liquid nitrogen to quench the reaction to stop the reaction, use methanol / water as the precipitant, repeat the precipitation 3 times, vacuum 45 Dry at ℃ to constant weight to obtain a degradable polyvinyl chloride block copolymer with a yield of 76.3%.

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Abstract

The invention discloses a degradable colored polyvinyl chloride composition and a preparation method thereof. The degradable colored polyvinyl chloride composition is prepared from the following components in parts by weight: 60 to 100 parts of degradable colored polyvinyl chloride segmented copolymer, 15 parts of nano calcium carbonate, 10 parts of ethylene-1-octene copolymer, 2 parts of polyvinyl alcohol, 1.5 parts of (2, 4-di-tert-butylphenyl) phosphite triester and 1 part of 2-hydroxy-4-methoxydipropiophenone. The degradable colored polyvinyl chloride composition prepared by the invention has sanitary safety and rapid degradability, can meet the requirements of physical and chemical properties of disposable medical consumables, and meanwhile, the obtained polyvinyl chloride material has stable coloring performance.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a degradable colored polyvinyl chloride composition and a preparation method thereof. Background technique [0002] Medical waste belongs to the first category of hazardous waste. Discarded disposable medical PVC products are usually buried with other solid waste; the experimental research of the European Vinyl Products Committee has proved that waste PVC products are not easy to decompose, and there will be a certain amount of waste in the landfill process. A large number of plasticizers and stabilizers are released into the soil, causing pollution to the environment; the existing technology usually uses modified starch, corn fiber, etc. to accelerate the degradation of plastics, but the addition of these materials will lead to insufficient strength of PVC materials and unacceptable degradation speed. control, the physical and chemical properties cannot meet the perf...

Claims

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Application Information

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IPC IPC(8): C08L53/00C08L23/08C08L29/04C08K3/26C08K5/526C08K5/132C08F293/00
CPCC08F293/005C08F2438/03C08K2003/265C08K2201/011C08L53/00C08L2201/06C08L2205/03C08L23/0815C08L29/04C08K3/26C08K5/526C08K5/132
Inventor 张玉花
Owner 张玉花
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