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Flame-retardant PVC material and preparation method thereof

A technology of PVC material and PVC resin, which is applied in the field of flame-retardant PVC material and its preparation, can solve the problems of reducing PVC mechanical properties, limited improvement effect, and uneven dispersion, so as to delay thermal degradation speed, slow down or inhibit combustion, and improve dispersion performance effect

Pending Publication Date: 2022-02-15
杨春生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PVC flame retardant provided by the present invention can greatly improve the flame retardant performance of PVC with little influence on the original mechanical properties of PVC, thereby further expanding the application range of PVC and improving the application value of PVC. Components such as antimony and magnesium hydroxide are commonly used inorganic flame retardants in this field, and they are easy to agglomerate and unevenly disperse in PVC materials. Although they can improve the flame retardant performance of PVC to a certain extent, the improvement effect is limited, but it will also reduce PVC's own mechanical properties

Method used

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  • Flame-retardant PVC material and preparation method thereof
  • Flame-retardant PVC material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] This embodiment provides a flame-retardant PVC material.

[0028] Composition of raw materials (parts by weight): 100 parts of PVC resin, 10 parts of surface-modified porous aluminum hydroxide microspheres, 5 parts of SbOCl, 2 parts of smoke suppressant, 2 parts of diisobutyl phthalate, bis(3,5 - 1 part of tertiary butyl-4-hydroxyphenyl) sulfide. The smoke suppressant is a compound mixture of zinc borate and molybdenum trioxide with a mass ratio of 3:1.

[0029] Surface modified porous aluminum hydroxide microspheres are prepared by the following method:

[0030] S1. Preparation of porous nano-aluminum hydroxide microspheres: adding pseudo-boehmite powder into water to obtain a suspension with a mass fraction of 15 wt%, adding 2 mol / L hydrochloric acid, adjusting the pH value to 4, heating to 70°C, and obtaining The sol is spray-dried after cooling to obtain porous nano-aluminum hydroxide microspheres;

[0031] S2. Porous nano-aluminum hydroxide microspheres loaded w...

Embodiment 2

[0035] This embodiment provides a flame-retardant PVC material.

[0036] Composition of raw materials (parts by weight): 120 parts of PVC resin, 10-15 parts of surface-modified porous aluminum hydroxide microspheres, 10 parts of SbOCl, 3 parts of smoke suppressant, 2-5 parts of di-n-octyl phthalate, 2, 3 parts of 6-tertiary butyl-4-methylphenol. The smoke suppressant is a compound mixture of zinc borate and molybdenum trioxide, with a mass ratio of 3:2.

[0037] Surface modified porous aluminum hydroxide microspheres are prepared by the following method:

[0038] S1. Preparation of porous nano-aluminum hydroxide microspheres: adding pseudo-boehmite powder into water to obtain a suspension with a mass fraction of 15 wt%, adding 0.5 mol / L of sulfuric acid, adjusting the pH value to 5, heating to 80°C, Obtain sol, spray dry after cooling, obtain porous nano-aluminum hydroxide microsphere;

[0039] S2. Porous nano-aluminum hydroxide microspheres loaded with adipic acid: Dissolv...

Embodiment 3

[0043] This embodiment provides a flame-retardant PVC material.

[0044] Composition of raw materials (parts by weight): 110 parts of PVC resin, 12 parts of surface-modified porous aluminum hydroxide microspheres, 7 parts of SbOCl, 2.5 parts of smoke suppressant, 3.5 parts of dioctyl phthalate, tetrakis [β-( 2 parts of 3,5-tertiary butyl-4-hydroxyphenyl) propionate] pentaerythritol ester. The smoke suppressant is a compound mixture of zinc borate and molybdenum trioxide with a mass ratio of 3:1.5.

[0045] Surface modified porous aluminum hydroxide microspheres are prepared by the following method:

[0046] S1. Preparation of porous nano-aluminum hydroxide microspheres: adding pseudo-boehmite powder into water to obtain a suspension with a mass fraction of 20 wt%, adding 1 mol / L nitric acid, adjusting the pH to 4.5, heating to 75°C, and obtaining The sol is spray-dried after cooling to obtain porous nano-aluminum hydroxide microspheres;

[0047] S2. Porous nano-aluminum hyd...

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Abstract

The invention provides a flame-retardant PVC material and a preparation method thereof, belonging to the technical field of PVC materials. The flame-retardant PVC material is prepared from the following raw materials in parts by weight: 100-120 parts of PVC resin, 10-15 parts of surface-modified porous aluminum hydroxide microspheres, 5-10 parts of SbOCl, 2-3 parts of a smoke suppressant, 2-5 parts of a plasticizer and 1-3 parts of an antioxidant, wherein the surface modified porous aluminum hydroxide microspheres are porous aluminum hydroxide microspheres with surfaces coated with polydopamine, and the particle sizes of the microspheres range from 100 nm to 500 nm. The flame-retardant PVC material prepared by the invention not only has good flame retardance, but also has better smoke suppression and abatement effects; cost is low due to the addition of an inorganic flame retardant; and the prepared PVC material has little influence on mechanical properties and has good market prospects.

Description

technical field [0001] The invention relates to the technical field of PVC materials, in particular to a flame-retardant PVC material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is formed by polymerization of vinyl chloride monomer (VCM) in peroxide, azo compound and other initiators; or under the action of light and heat according to the mechanism of free radical polymerization of polymers. PVC is a thermoplastic material with a wide range of uses. Due to the defects of PVC itself, plasticizers need to be added to improve the performance of PVC. However, after plasticizers are added to PVC materials, the flame retardancy of PVC materials is greatly reduced. , and the PVC material will produce a large amount of black smoke and toxic gas when a fire breaks out, causing secondary disasters. Therefore, how to improve the flame retardancy of PVC materials is a technical problem that needs to be solved at present. [0003] PVC flame ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/10C08K7/24C08K3/18C08K3/38C08K3/22
CPCC08K9/10C08K7/24C08K3/18C08K3/38C08K3/22C08L2201/02C08K2003/2227C08K2003/2255C08K2003/387C08L27/06
Inventor 杨春生
Owner 杨春生
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