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Halogen-free phosphate-free environment-friendly synergistic flame retardant and use thereof

A synergistic flame retardant and synergistic flame retardant technology, which is applied in the field of flame retardants, can solve the problems of insignificant synergistic effect, loose combination, slipping processing of extruder screw, etc., and achieve excellent synergistic flame retardant effect. , easy to use effect

Active Publication Date: 2013-04-17
JIANGSU YONGXIN MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This kind of high molecular weight polysiloxane flame retardant is only physically mixed with aluminum hydroxide and magnesium hydroxide, etc., without chemical reaction, so the combination is not close, basically two substances, so when used as a flame retardant The synergistic effect is not significant, so the addition amount needs to be more than 5% or even 10% of the weight ratio of aluminum hydroxide and magnesium hydroxide to show a significant synergistic flame retardant effect
Moreover, high dosage often leads to processing difficulties such as extruder screw slippage

Method used

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  • Halogen-free phosphate-free environment-friendly synergistic flame retardant and use thereof
  • Halogen-free phosphate-free environment-friendly synergistic flame retardant and use thereof
  • Halogen-free phosphate-free environment-friendly synergistic flame retardant and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0051] Raw material description:

[0052] PE: Polyethylene

[0053] EVA: Ethylene-vinyl acetate copolymer

[0054] POE: polyolefin elastomer

[0055] PE+EVA+POE mixture: a mixture of PE, EVA, and POE at a mass ratio of 25:52:23

[0056] In the structural unit of the graft-modified polysiloxane used, R is a methoxyl group, and W is a phenyl group

[0057] The preparation method of graft modified polysiloxane:

[0058] Octamethylcyclotetrasiloxane plus sulfuric acid ring-opening and phenyltrimethoxysilane are obtained through equilibrium polymerization. The grafting rate and weight average molecular weight are controlled by conventional methods in the field, and the weight average molecular weight is measured by GPC.

[0059] The conditions for the preparation of graft-modified polysiloxane in this example and the following examples all adopt the conventional conditions of ring-opening polymerization in the art.

[0060] experiment method:

[0061] Mix (PE+EVA+POE) mixture...

Embodiment 8-13

[0066] experiment method:

[0067] Mix (PE+EVA+POE) mixture with Al(OH) 3 Mix evenly in a high-speed mixer or internal mixer at a weight ratio of 4:6, add the above-mentioned graft-modified polysiloxane, continue to mix evenly and granulate to prepare low-smoke and halogen-free cable materials, inject into standard samples to measure oxygen index and Mechanical properties parameters.

[0068]

[0069]

[0070] *Addition % refers to the weight percentage of graft-modified polysiloxane in Al(OH)3.

Embodiment 14-20

[0072] experiment method:

[0073] Mix (PE+EVA+POE) mixture and inorganic flame retardant in a high-speed mixer or internal mixer at a weight ratio of 4:6, add graft-modified polysiloxane, continue to mix and granulate to prepare low-smoke Halogen-free cable material, injected into a standard sample to measure the oxygen index and mechanical performance parameters.

[0074]

[0075] *Addition % refers to: graft modified polysiloxane accounts for Mg(OH) 2 weight percent.

[0076] In the structural unit of the graft-modified polysiloxane used in label 15, R is a methoxyl group, and W is a phenyl group, which is octamethylcyclotetrasiloxane plus sulfuric acid ring-opening and phenyltrimethoxysilane equilibrium aggregated to obtain.

[0077] The structural unit R of the graft-modified polysiloxane adopted by the label 16 is an aminopropyl group, and W is a methyl group; Obtained by equilibrium polymerization of silanes.

[0078] The structural unit R of the graft-modified ...

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Abstract

The invention discloses a halogen-free phosphate-free environment-friendly synergistic flame retardant and the use thereof. The halogen-free phosphate-free synergistic flame retardant takes grafted and modified polysiloxane as a synergistic flame retardant component; the main chain Si of the grafted and modified polysiloxane is grafted with a group which has reaction activity on the surface hydroxyl group of Mg(OH) or AL(OH)3; the grafting ratio of the grafted and modified polysiloxane is 0.001 to 50%; and the weight-average molecular weight Mw of the grafted and modified polysiloxane is 80 to 7,000,000g / mol. The halogen-free phosphate-free synergistic flame retardant is environment-friendly and efficient, can be matched with other environment-friendly inorganic flame retardants, such as magnesium hydroxide and aluminum hydroxide, in a very small amount, and obviously improves the flame retardation of the system without reducing the mechanical performance of the final added system.

Description

technical field [0001] The invention relates to a flame retardant, in particular to a halogen-free, phosphorus-free, environment-friendly and synergistic flame retardant for polymer materials such as plastics or rubber and its application. Background technique [0002] Inorganic environmentally friendly flame retardants such as aluminum hydroxide and magnesium hydroxide have been developed rapidly in recent years because they do not produce toxic gases during combustion; but they can only achieve a certain flame retardant effect at a high filling amount, resulting in Viscosity increases, molding processability deteriorates, and the water resistance, electrical and mechanical properties of the flame retardant material decrease. The synergistic use of silicone and aluminum hydroxide or magnesium hydroxide can not only improve the flame retardant efficiency, but also increase the dispersion of aluminum hydroxide or magnesium hydroxide in the substrate and reduce the amount of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/08C08L83/06C08G77/06C08G77/26C08G77/18C08G77/16C08K3/22C08L23/08C08L23/06H01B3/44
Inventor 姜文
Owner JIANGSU YONGXIN MATERIAL TECH CO LTD
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