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Flame retardant for pvc processing, preparation method thereof, and flame retardant power pipe containing the same

A flame retardant and flame retardant technology, applied in the field of PVC flame retardant, can solve the problems of unable to meet the requirements of inorganic flame retardant coating, limited β-cyclodextrin coating rate, difficulty in inorganic flame retardants, etc., to achieve increased Active loading sites, improved flame retardant effect, improved chelation effect

Active Publication Date: 2022-07-26
四川兴辉腾集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, in order to improve the flame retardant effect, the method of coating a variety of inorganic flame retardants is used to achieve its flame retardant purpose, but the coating rate of β-cyclodextrin is limited, which cannot meet the requirements of excessive inorganic flame retardant coating. Flame retardant coating requirements, and if the amount of inorganic flame retardant added is too large, there is a problem that the inorganic flame retardant is difficult to mix in the PVC system

Method used

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  • Flame retardant for pvc processing, preparation method thereof, and flame retardant power pipe containing the same
  • Flame retardant for pvc processing, preparation method thereof, and flame retardant power pipe containing the same

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preparation example Construction

[0037] Second, the present invention provides a preparation method of a flame retardant for PVC processing, comprising the following steps:

[0038] (1) Weigh the nano-inorganic flame retardant, organically modified cyclodextrin and salts containing flame retardant elements in proportion;

[0039](2) Dissolving the salt containing the flame retardant element in water to form a salt solution, and then immersing the organically modified cyclodextrin in the salt solution, so that the flame retardant element is loaded on the organically modified cyclodextrin, and at the same time adding nanometer The inorganic flame retardants are blended to form a coating liquid, which is uniformly stirred at 25-30° C. and 5000-8000 r / min, and then spray-dried to obtain a flame-retardant coating.

[0040] In the present invention, the mass ratio of the salts of flame retardant elements, water, organically modified cyclodextrin, and nano-inorganic flame retardant is 1-10:100-200:40-60:15-25.

[0...

Embodiment 1

[0047] A flame retardant for PVC processing, and a preparation method thereof, comprising the following steps:

[0048] (1) Preparation of organically modified cyclodextrin

[0049] DMF was placed in an airtight container, and potassium persulfate was added to dissolve after nitrogen removal; acrylonitrile and β-cyclodextrin were dissolved in an organic solvent, blended and treated at elevated temperature (65°C, 5h) to obtain the reaction product. After centrifugation, the product was repeatedly sonicated and dissolved in DMF until the supernatant had no white precipitate. The final product was washed with absolute ethanol and then dried to obtain an intermediate product; the intermediate product was added to 1 mol / L NaOH solution for saponification. After reaction (75°C, 1.5h), centrifugation, and drying (50°C, 4h), polyacrylonitrile saponified modified β-cyclodextrin was obtained. The volume ratio of DMF to acrylonitrile was 6:1, the addition amount of potassium persulfate ...

Embodiment 2

[0055] The difference between this example and Example 1 is that the addition amount of magnesium chloride and zinc chloride in (2) is 3 parts.

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Abstract

The invention relates to the technical field of PVC flame retardant, and discloses a flame retardant for PVC processing, comprising a flame retardant coating, wherein the flame retardant coating comprises a capsule core and an inner capsule shell; the capsule core is a nano inorganic flame retardant , the inner capsule shell is an organically modified cyclodextrin loaded with flame-retardant elements, and the organically modified cyclodextrin is grafted with a chelating functional group; the components of the flame-retardant coating are calculated in parts by weight , the capsule core accounts for 15 to 25 parts, and the inner capsule shell accounts for 40 to 60 parts. At the same time, a preparation method and a flame retardant power pipe are disclosed. In this application, β-cyclodextrin is organically modified to achieve the purpose of increasing the active loading sites of β-cyclodextrin; organic macromolecules with chelating functional groups can be selected to improve the efficiency of flame retardant elements and The degree of chelation of the macromolecular structure; and then through the synergistic effect of the flame-retardant elements and the nano-inorganic flame retardant, it is convenient to further improve the flame retardant effect and maintain the mechanical properties of the PVC system.

Description

technical field [0001] The invention relates to the technical field of PVC flame retardant, in particular to a flame retardant for PVC processing, a preparation method thereof, and a flame retardant power pipe comprising the same. Background technique [0002] PVC is a polymer material commonly used in the field of electric power. The characteristics of PVC are high voltage resistance and insulation resistance, as well as flame retardant, oil resistance, weather resistance, chemical resistance and other properties, so it is widely used. Since pure PVC is a rigid segment, it begins to decompose when it is above 90 °C. Plasticizers need to be added during processing. However, plasticizers are flammable. When adding soft PVC with plasticizers, flame retardants must be added. It has a flame retardant effect. At present, it is mostly realized by adding halogen-containing flame retardants. However, halogen-containing flame retardants will generate a large amount of smoke and tox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K3/22C08K3/26C08K7/04C08K7/10C08L27/06
CPCC08K9/10C08K3/22C08K3/2279C08K3/26C08K7/04C08K7/10C08L27/06C08K2201/011C08L2201/02C08K2003/2227C08K2003/2224C08L2203/18
Inventor 李伦朱明闯
Owner 四川兴辉腾集团有限公司
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