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A kind of preparation method of flame-retardant PVC injection plastic

A technology of injection molding and plasticizer, which is applied in the field of preparation of flame-retardant PVC injection molding, and can solve problems such as hazards, poor flame-retardant effect, and poor flame-retardant performance

Active Publication Date: 2021-02-23
ZHEJIANG WELLSCOM PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the cable industry usually uses PVC as the insulating pipe on the outside of the cable, but due to the disadvantages of PVC resin itself, its flame retardancy is poor, and it is difficult to meet the needs of the existing industry; there are also some in the prior art that have flame retardancy PVC cable injection molding, but the flame retardant additives added, some are flame retardants containing halogens, which have a greater harmful effect, and others have poor flame retardant effects; in addition, the existing PVC cable insulation pipes Generally hard, it is difficult to be suitable for certain use environments, and the addition of existing plasticizers to improve its softness will affect the flame retardancy of the pipe; Flame-retardant PVC injection molding material for PVC insulating materials with excellent flame-retardant properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method for flame-retardant PVC injection molding, comprising the following steps:

[0028] a) Diatomite modification: Soak diatomite in hydrochloric acid solution and water for 30 minutes respectively and dry, then add it to a saturated ammonium carbonate solution at 25°C that is twice the weight of diatomite, ultrasonically disperse and dry at the same time dry, then add polysiloxane flame retardant 0.2 times the weight of diatomite and silane coupling agent 0.3 times the weight of diatomite and mix evenly, then dry at 60°C to obtain modified diatomite;

[0029] b) Ingredients: 80 parts of PVC resin, 80 parts of modified diatomite, 20 parts of composite rubber, 5 parts of plasticizer, 6 parts of lubricant, 4 parts of heat stabilizer, 1 part of fluidity modifier, film-forming The weight ratio of 10 parts of agent weighs each component; Composite rubber comprises the component of following weight percentage, nitrile rubber 35wt%, EPDM rubber 30wt%, chloropr...

Embodiment 2

[0033] A preparation method for flame-retardant PVC injection molding, comprising the following steps:

[0034] a) Modification with diatomite: Soak diatomite in hydrochloric acid solution and water for 32 minutes respectively and dry it, then add it to a saturated ammonium carbonate solution at 26°C that is 2.5 times the weight of diatomite, ultrasonically disperse and dry at the same time dry, then add polysiloxane flame retardant 0.3 times the weight of diatomite and silane coupling agent 0.32 times the weight of diatomite and mix evenly, then dry at 62°C to obtain modified diatomite;

[0035] b) Ingredients: 80 parts of PVC resin, 85 parts of modified diatomite, 25 parts of composite rubber, 6 parts of plasticizer, 7 parts of lubricant, 4.5 parts of heat stabilizer, 2 parts of fluidity modifier, film forming The weight ratio of 12 parts of agent weighs each component; Composite rubber comprises the component of following weight percentage, nitrile rubber 36wt%, EPDM rubber...

Embodiment 3

[0039] A preparation method for flame-retardant PVC injection molding, comprising the following steps:

[0040] a) Diatomite modification: Soak diatomite in hydrochloric acid solution and water for 35 minutes respectively and dry it, then add it to a saturated ammonium carbonate solution at 27.5°C that is 3 times the weight of diatomite, ultrasonically disperse and dry at the same time dry, then add polysiloxane flame retardant 0.35 times the weight of diatomite and silane coupling agent 0.35 times the weight of diatomite, mix evenly, and then dry at 65°C to obtain modified diatomite;

[0041] b) Ingredients: 80 parts of PVC resin, 90 parts of modified diatomite, 27.5 parts of composite rubber, 6.5 parts of plasticizer, 7.5 parts of lubricant, 5 parts of heat stabilizer, 2.5 parts of fluidity modifier, film forming The weight ratio of 12.5 parts of agent takes each component; Composite rubber comprises the component of following weight percentage, nitrile rubber 37.5wt%, EPDM ...

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PUM

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Abstract

The invention belongs to the technical field of cable injection plastic manufacturing. The invention discloses a preparation method of flame-retardant PVC injection molding, which comprises the steps of diatomite modification, batching, mixing and granulation, wherein the diatomite modification includes sequentially soaking diatomite in hydrochloric acid solution and water and Dry it, then add it into saturated ammonium carbonate solution, ultrasonically disperse and dry it at the same time, then add polysiloxane flame retardant and silane coupling agent, mix evenly, and then dry to prepare modified diatomite. The flame-retardant PVC injection compound prepared by the invention has excellent injection molding processing performance, excellent flame-retardant effect, and has the characteristics of smooth and delicate surface, good softness and the like of injection molded products.

Description

technical field [0001] The invention relates to the technical field of cable injection molding, in particular to a method for preparing flame-retardant PVC injection molding. Background technique [0002] In the prior art, the cable industry usually uses PVC as the insulating pipe on the outside of the cable, but due to the disadvantages of PVC resin itself, its flame retardancy is poor, and it is difficult to meet the needs of the existing industry; there are also some in the prior art that have flame retardancy PVC cable injection molding, but the flame retardant additives added, some are flame retardants containing halogens, which have a greater harmful effect, and others have poor flame retardant effects; in addition, the existing PVC cable insulation pipes Generally hard, it is difficult to be suitable for certain use environments, and the addition of existing plasticizers to improve its softness will affect the flame retardancy of the pipe; Flame-retardant PVC injecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L9/02C08L23/16C08L11/00C08K13/06C08K9/10C08K9/02C08K9/06C08K7/26
Inventor 李晓东余立峰赵亚琼
Owner ZHEJIANG WELLSCOM PLASTIC CO LTD