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Zinc phosphomolybdate flame retarding and smoke suppressing PVC sheet material

A technology of zinc phosphomolybdate and phosphomolybdic acid, which is applied in the direction of phosphorus compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of exhaustion of HCl, weakening of flame retardant performance, weakening of PVC flame retardant performance, etc., and achieve the reduction of benzene And the generation of aromatic hydrocarbons, the improvement of flame retardant and smoke suppression performance, and the effect of promoting cross-linking into char

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AI Technical Summary

Problems solved by technology

Pure polyvinyl chloride (PVC) has a relatively high chlorine content, making its limiting oxygen index range from 45 to 49. It is difficult to ignite and continue to burn in the air, so pure polyvinyl chloride (PVC) has excellent flame retardancy; However, pure polyvinyl chloride (PVC) will emit a lot of black smoke when it burns in the air, especially the polyvinyl chloride (PVC) treated with plasticizers, such as plasticizer dioctyl phthalate (DOP) For example, polyvinyl chloride (PVC) burns and decomposes to produce HCl, which quickly reacts with DOP to produce phthalic acid, and its combustion will also form black smoke, which further weakens the smoke suppression performance of polyvinyl chloride (PVC); it also leads to the consumption of HCl Exhausted, and then unable to capture free radicals that promote combustion, resulting in weakened flame retardant properties. In order to meet technical and safety indicators, polyvinyl chloride (PVC) needs to be treated with flame retardant and smoke suppression
[0003] At present, the smoke suppressants used in polyvinyl chloride (PVC) are mainly molybdenum compounds, among which molybdenum trioxide (MoO3) and ammonium octamolybdate have been commercialized, but MoO3 will catalyze polyvinyl chloride (PVC) under high temperature. ) The cationic cracking reaction of the polyene chain results in an increase in aliphatic hydrocarbons and a decrease in aromatic hydrocarbons. As a fuel, aliphatic hydrocarbons burn to release more heat, which weakens the flame retardant performance of PVC, and the flame retardant effect of ammonium octamolybdate is limited, so , the above two smoke suppressants need to be compounded with flame retardants to be used in PVC
For the combined use of smoke suppressant and flame retardant, it is necessary to consider the ratio of its use, otherwise, it will affect its flame retardant and smoke suppression effect on PVC

Method used

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  • Zinc phosphomolybdate flame retarding and smoke suppressing PVC sheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 3 parts of molybdenum trioxide, ammonium octamolybdate and zinc phosphomolybdate, 4 parts of rare earth stabilizer, 0.5 part of CaSt stabilizer, 2 parts of phosphate coupling agent, 8 parts of DOP, and 0.4 part of PE wax to 100 parts In PVC resin (PVC-SG5, average density 1.40 g / cm3, Xinjiang Zhongtai Chemical Co., Ltd.), after uniform mixing in a high-speed pulverizer, kneading on an open mill for 4 min at a temperature of 150 °C; the kneaded product Hot pressing in a hydraulic press, pre-pressing for 2 min, hot pressing for 4 min, temperature 170 °C; hot-pressed products were cold-pressed in a flat vulcanizer for 2 min to obtain PVC sheets, which were used for smoke density, cone calorimetry and thermal For weight loss analysis test.

[0025] The test result of embodiment 1:

Embodiment 2

[0027] Add 5 parts of molybdenum trioxide, ammonium octamolybdate and zinc phosphomolybdate, 4 parts of rare earth stabilizer, 0.5 part of CaSt stabilizer, 2 parts of phosphate coupling agent, 8 parts of DOP, and 0.4 part of PE wax to 100 parts In PVC resin (PVC-SG5, average density 1.40 g / cm3, Xinjiang Zhongtai Chemical Co., Ltd.), after uniform mixing in a high-speed pulverizer, kneading on an open mill for 4 min at a temperature of 150 °C; the kneaded product Hot pressing in a hydraulic press, pre-pressing for 2 min, hot pressing for 4 min, temperature 170 °C; hot-pressed products were cold-pressed in a flat vulcanizer for 2 min to obtain PVC sheets, which were used for smoke density, cone calorimetry and thermal For weight loss analysis test.

[0028] The test result of embodiment 2:

[0029]

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Abstract

The invention discloses a zinc phosphomolybdate flame retarding and smoke suppressing PVC sheet material which is prepared from the following components in parts by weight: 100 parts of PVC resin, 4 to 5 parts of a heat stabilizer, 5 to 20 parts of a plasticizer, 3 to 7 parts of a flame retarding and smoke suppressing agent, 0.5 to 3 parts of a phosphate coupling agent and 0.4 to 0.6 part of PE wax. According to the PVC sheet material, by the flame retarding action of phosphorus and the smoke suppressing action of molybdenum and zinc, the synergistic effect of phosphorus, molybdenum and zinc can effectively improve the flame retarding and smoke suppressing performance of the PVC sheet material.

Description

technical field [0001] The invention relates to a PVC sheet, in particular to a zinc phosphomolybdate flame-retardant and smoke-suppressing PVC sheet. Background technique [0002] As we all know, polyvinyl chloride (PVC) has excellent electrical insulation and mechanical properties, and its low price makes it widely used in construction and electrical fields. When used, PVC can be made into soft, semi-rigid and hard products according to the amount of plasticizer added. Pure polyvinyl chloride (PVC) has a relatively high chlorine content, making its limiting oxygen index range from 45 to 49. It is difficult to ignite and continue to burn in the air, so pure polyvinyl chloride (PVC) has excellent flame retardancy; However, pure polyvinyl chloride (PVC) will emit a lot of black smoke when it burns in the air, especially the polyvinyl chloride (PVC) treated with plasticizers, such as plasticizer dioctyl phthalate (DOP) For example, polyvinyl chloride (PVC) burns and decompos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/06C08K13/02C08K3/32C08K5/12C01B25/45
CPCC01B25/45C08L27/06C08L2201/02C08L23/06C08K13/02C08K2003/329C08K5/12
Inventor 马青赛朱山宝陈绪煌
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