Environment-friendly low-precipitation soft PVC material and preparation method thereof

A PVC material and soft technology, which is applied in the field of environmental protection and low precipitation soft PVC material and preparation, can solve the problems that the precipitation rate cannot meet the requirements, reduce the precipitation rate, and cannot meet the medical requirements, etc.

Pending Publication Date: 2021-05-18
浙江天原医用材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting soft polyvinyl chloride pellets have improved the plasticizing efficiency and toughness to a certain extent, and reduced the precipitation rate, but the precipitation rate of the product still cannot meet the requirements, and cannot meet the medical requirements

Method used

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  • Environment-friendly low-precipitation soft PVC material and preparation method thereof
  • Environment-friendly low-precipitation soft PVC material and preparation method thereof
  • Environment-friendly low-precipitation soft PVC material and preparation method thereof

Examples

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preparation example Construction

[0030] A kind of preparation of environment-friendly low precipitation soft PVC material comprises the following steps:

[0031] (1) Preparation of auxiliary stabilizer: add linseed oil and soybean oil to formic acid, stir and mix at 25°C, the stirring speed is 9000r / min, slowly add hydrogen peroxide containing catalyst, control the reaction temperature and keep it at 60°C, and the stirring speed is The epoxidation reaction was carried out at 1300r / min. After the hydrogen peroxide was added, and the temperature was kept at 60°C, the reaction was continued for 11 hours. The mass ratio of the linseed oil, soybean oil and formic acid is 60:40:20. The mass ratio of the catalyst to the hydrogen peroxide is 1:30; the mass ratio of the hydrogen peroxide to the linseed oil is 2:1. The catalyst is phosphoric acid.

[0032] (2) Preparation of calcium-zinc composite stabilizer: calcium stearate, zinc stearate, polyethylene wax, β-(3,5-ditert-tert Butyl-4-hydroxyphenyl) n-octadecyl pro...

Embodiment 1-10

[0035] The parts by weight of the raw materials used in each embodiment are shown in Table 1 below:

[0036] Table 1, the amount of each component is in kg

[0037]

Embodiment 11

[0056] A kind of preparation of environment-friendly low precipitation soft PVC material comprises the following steps:

[0057] (1) Preparation of auxiliary stabilizer: Add linseed oil and soybean oil to formic acid, stir and mix at 20°C, the stirring speed is 800r / min, slowly add hydrogen peroxide containing catalyst, control the reaction temperature to remain at 50°C, and the stirring speed is The epoxidation reaction was carried out at 1200r / min. After the hydrogen peroxide was added, and the temperature was kept at 50°C, the reaction was continued for 10 hours. The mass ratio of the linseed oil, soybean oil and formic acid is 50:50:10. The mass ratio of the catalyst to the hydrogen peroxide is 1:20; the mass ratio of the hydrogen peroxide to the linseed oil is 1:1. The catalyst is titanium dioxide.

[0058] (2) Preparation of calcium-zinc composite stabilizer: calcium stearate, zinc stearate, polyethylene wax, β-(3,5-ditert-tert Butyl-4-hydroxyphenyl) n-octadecyl propi...

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Abstract

The invention relates to an environment-friendly low-precipitation soft PVC material and a preparation method thereof. 100 parts by weight of polyvinyl chloride resin powder, 30-80 parts by weight of an environment-friendly plasticizer, 5-10 parts by weight of an auxiliary stabilizer, 0.1-0.5 part by weight of a calcium-zinc composite stabilizer and 0.2-0.6 part by weight of wax powder are uniformly mixed at normal temperature to obtain the product. The preparation method comprises the following steps: adding the polyvinyl chloride resin powder, the environment-friendly plasticizer and the auxiliary stabilizer into a high-speed hot kneading machine, mixing for 10-30 minutes, then adding the calcium-zinc composite stabilizer and the wax powder, continuously mixing for 10-15 minutes, discharging the kneaded material into a cold kneading machine, cooling, plasticizing, extruding, granulating and molding. Compared with the prior art, the PVC material obtained by the method has the advantages of environmental protection, low precipitation, softness and high thermal stability.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an environment-friendly low-precipitation soft PVC material and a preparation method. Background technique [0002] As the most widely used plastic raw material, polyvinyl chloride has long been widely used in various industries at home and abroad. In foreign countries, the popularity rate of polyvinyl chloride products is very high, and the use rate of polyvinyl chloride is also very high. In recent years, with the continuous improvement of people's living standards, people have higher and higher environmental protection requirements for polyvinyl chloride plastic products, especially in Europe. Ortho-phthalic plasticizers such as DEHP shall not be used in plastic products that affect human health. [0003] The polyvinyl chloride products previously developed in China were basically formulated with ortho-benzene plasticizers, which completely failed to mee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L91/00C08L23/06C08L63/00C08K5/12C08K5/098C08K3/26C08K5/134C08K13/02
CPCC08L27/06C08L2205/035C08L2205/025C08L2201/08C08L91/00C08L23/06C08L63/00C08K5/12C08K5/098C08K3/26C08K5/1345C08K13/02
Inventor 游茵王静雅吴维新苏青青
Owner 浙江天原医用材料有限公司
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