Halogen free flame retardant PVC material and preparation method thereof

A technology for PVC materials and flame-retardant dyes, which is applied in the field of halogen-free flame-retardant PVC materials and its preparation, and can solve the problems of affecting the flame-retardant properties of materials, low flame-retardant properties, and poor compatibility

Inactive Publication Date: 2020-04-10
安徽瑞智福瑶环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a halogen-free flame-retardant PVC material and its preparation method. By preparing unsaturated chromatic monomers, the unsaturated chromatic monomers and PVC are directly grafted through free radical polymerization, so that the unsaturated chromatic monomers Evenly grafted on the PVC molecular chain, and because the prepared unsaturated dye monomer contains a large number of phosphate groups, after grafting on the PVC molecule, the PVC molecular chain contains a large amount of phosphate groups evenly, and then The prepared PVC material has a uniform flame retardant performance, and then solves the problem that the flame retardant performance of the existing PVC material is low. Generally, the flame retardant performance is improved by adding a flame retardant, and the compatibility between the organic phosphorus flame retardant and PVC Poor performance, which in turn causes the flame retardant to not be uniformly dispersed in the PVC material, which affects the flame retardant performance of the material

Method used

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  • Halogen free flame retardant PVC material and preparation method thereof
  • Halogen free flame retardant PVC material and preparation method thereof
  • Halogen free flame retardant PVC material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The specific preparation process of unsaturated chromatids is as follows:

[0022] Step 1: Weigh 100g of phytic acid and dissolve it in water to form a phytic acid solution with a concentration of 60%, then add 108g of 2-methyl-4-oxo-2-pentanol and the prepared phytic acid solution to the reaction vessel at the same time, Then raise the temperature to 80-85°C and stir for 4-5h at constant temperature, then evaporate to remove the solvent to obtain product A, and the reaction structure is as follows;

[0023]

[0024] Step 2: Mix concentrated hydrochloric acid with a mass concentration of 70% and concentrated sulfuric acid with a mass concentration of 60% according to a volume ratio of 1:4 to prepare a mixed acid solution, and then add 120mL of the mixed acid solution and 23g of the direct dye to the reaction at the same time In the kettle, lower the temperature to 10-15°C, then add 3.6g of paraformaldehyde and 10g of product A to it, stir and react at constant temper...

Embodiment 2

[0027]The specific preparation process of the unsaturated chromatid is as follows: add 100g of direct dye to 200mL of water and stir to dissolve, then raise the temperature to 250°C, add 8g of p-toluenesulfonic acid to it, stir for 4-5min, then add 26g of maleic anhydride, and then react under constant temperature reflux 15-16h, then filter, wash and dry to obtain unsaturated chromatids.

Embodiment 3

[0029] The specific preparation method of unsaturated piperidine amine monomer is as follows: Add 15.6g of 2,2,6,6-tetramethylpiperidinamine into 200mL of ether, then add 7g of crotonaldehyde to it, heat up to 70-80°C for reflux reaction 8-10h, and then carry out vacuum distillation to obtain a light yellow liquid, which is the unsaturated piperidine amine monomer.

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Abstract

The invention discloses a halogen free flame retardant PVC material, which comprises following components in parts by weight: 78 to 86 parts of PVC, 5 to 7 parts of unsaturated chromatid, 0.6 to 0.8 part of unsaturated piperylhydrazine monomers, 2.3 to 2.5 parts of BPO, 0.9 to 1 part of a dispersant, and 0.5 to 0.6 part of nano calcium carbonate. Prepared unsaturated chromatids and PVC carry out free radical polymerization reactions directly; unsaturated chromatids are uniformly grafted onto the PVC molecular chains; at the same time, prepared unsaturated chromatids are rich in phosphate groups, after unsaturated chromatids are grafted to PVC molecules, the PVC molecular chains uniformly have a large amount of phosphate groups, thus the prepared PVC material has a uniform flame retardant performance; in the prior art, the flame retardant performance of a conventional PVC material is bad, normally, a flame retardant is added to enhance the flame retardant performance, due to the bad compatibility between an organic phosphor flame retardant and PVC, the flame retardant cannot be uniformly dispersed in the PVC material, the flame retardant performance of the PVC material is influenced, and the problems mentioned above are solved.

Description

technical field [0001] The invention belongs to the field of new material processing and relates to the preparation of PVC materials, in particular to a halogen-free flame-retardant PVC material and a preparation method thereof. Background technique [0002] PVC materials are widely used in wire sheaths, optical fiber sheaths, billboards, etc. due to their good mechanical properties and excellent dielectric properties. In order to achieve aesthetic performance, coloring pigments are added during the preparation of PVC materials to prepare different colors. PVC material, during the coloring process, is free from the system due to the poor compatibility or incompatibility of the coloring matter, and deposits on the surface of the processing equipment, resulting in uneven coloring and lightening of the color, which affects the appearance. At the same time, PVC In the process of material processing, in order to improve the performance of the material, half of them need to add me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F259/04C08F230/02C08F226/02
CPCC08F259/04
Inventor 王双炎王善波
Owner 安徽瑞智福瑶环保科技有限公司
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