Flame-retardant high polymer material based on compounding of phosphorus containing char-forming agents and hypophosphite/phosphonate

A polymer material and phosphonate technology, applied in the field of halogen-free flame-retardant polymer materials, can solve the problems of unsustainable flame retardancy, unsatisfactory smoke suppression effect, and reduced total release, so as to achieve low smoke generation, Good smoke suppression effect, the effect of adding less

Active Publication Date: 2017-03-15
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, there are still two major deficiencies in the intumescent flame retardant system: First, most of the smoke suppression effects are not ideal, such as the intumescent flame retardant system reported in Ind.Eng.Chem.Res.2016, 55, 7132. When the addition amount is 30wt%, it can only reduce the total smoke emission of the base material by 1.1%. Durable, affecting long-term use, such as the report in RSC Advances, 2015, 5, 16328 that the oxygen index of polymer materials containing intumescent flame retardants dropped by about 4.5-5.5% after soaking in water for 7 days

Method used

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  • Flame-retardant high polymer material based on compounding of phosphorus containing char-forming agents and hypophosphite/phosphonate
  • Flame-retardant high polymer material based on compounding of phosphorus containing char-forming agents and hypophosphite/phosphonate
  • Flame-retardant high polymer material based on compounding of phosphorus containing char-forming agents and hypophosphite/phosphonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 60% low-density polyethylene (PE), 30% phosphorus-containing char-forming agent (obtained from the reaction of ethylenediamine), 5% aluminum diisobutylphosphinate flame retardant and 5% by mass percentage % The synergistic flame retardant zinc borate is dried in a vacuum oven for 8 hours, mixed evenly, then placed in a twin-screw extruder at a temperature of 150-180°C to melt and extrude, cooled, granulated and dried.

[0034] The oxygen index of the obtained halogen-free flame-retardant PE material is 38.0%, and the UL-94 vertical combustion rating is V-0. Compared with the pure substrate in the cone calorimetry test, the total amount of heat release is reduced by 70.5%, and the total amount of smoke release is reduced by 67.5%. %, after soaking in hot water at 70°C for 168h and drying, the vertical burning test grade remains unchanged, and the oxygen index only decreases by 0.1%.

Embodiment 2

[0036] In terms of mass percentage, 69% polypropylene (PP), 1% phosphorus-containing char-forming agent (obtained from the reaction of ethanolamine), 25% phenylisobutylphosphinate aluminum flame retardant and 5% di Calcium isobutylphosphinate flame retardant is dried in a vacuum oven for 8 hours, mixed evenly, then placed in a twin-screw extruder at a temperature of 190-220°C to melt and extrude, cooled, granulated and dried.

[0037] The oxygen index of the obtained halogen-free flame-retardant PP material is 39.0%, and the UL-94 vertical combustion rating is V-0. Compared with the pure substrate in the cone calorimetry test, the total amount of heat release is reduced by 65.5%, and the total amount of smoke release is reduced by 62.8% %, after soaking in hot water at 70°C for 168 hours and drying, the vertical burning test grade remains unchanged, and the oxygen index only decreases by 0.4%.

Embodiment 3

[0039] 70% polystyrene (PS), 28.5% phosphorus-containing char-forming agent (derived from the reaction of phenylenediamine), 0.5% aluminum hypophosphite flame retardant and 1% synergistic flame retardant by mass percentage The powdered stone is dried in a vacuum oven for 8 hours, mixed evenly, then placed in a twin-screw extruder at a temperature of 210-240°C to melt and extrude, cooled, granulated and dried.

[0040] The oxygen index of the obtained halogen-free flame-retardant PS material is 35.0%, and the UL-94 vertical combustion rating is V-0. Compared with the pure substrate in the cone calorimetry test, the total amount of heat release is reduced by 60.2%, and the total amount of smoke release is reduced by 56.6%. %, after soaking in hot water at 70°C for 168h and drying, the vertical burning test grade remains unchanged, and the oxygen index drops by 0%.

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Abstract

The invention discloses a flame-retardant high polymer material based on compounding of phosphorus containing char-forming agents and hypophosphite/phosphonate. The flame-retardant high polymer material is formed by blending, in weight percentage, 60-95% of high polymer base materials, 1-35% of phosphorus containing char-forming agents, 0.5-30% of hypophosphite/phosphonate and 0-5% of synergistic flame retardants. The compound main flame retardants used in the material have double char-forming functions, the material has excellent flame-retardant and smoke suppression properties, limit oxygen index reaches up to 27.0-49.5%, vertical burning test level ranges from UL-94V-1 to V-0, the total heat release of the material in cone calorimeter is reduced by 48.2-90.5% as compared with that of a pure base material, and total smoke release is reduced by 41.6-88.5%. Besides, the flame retardants used in the flame-retardant high polymer material have excellent water resistance, so that the material also has excellent water resistance, after the material is soaked in 70 DEG C for 168 hours and then dried, the vertical burning test level is unchanged, and the oxygen index is only reduced by 0-0.5%.

Description

technical field [0001] The invention belongs to the technical field of halogen-free flame-retardant polymer materials, and specifically relates to a polymer material based on the excellent flame-retardant performance, smoke-suppressing effect and water-resistant performance obtained by compounding phosphorus-containing char-forming agent and hypophosphorus / phosphonate . Background technique [0002] Since the 1950s, research on polymers has sprung up and developed rapidly. Various polymer materials have been developed and widely used in aerospace, building materials, electronic appliances, automobiles, home improvement, and textiles. And other fields, covering all aspects of people's daily life "clothing, food, housing and transportation", has become an indispensable part of the entire national economy, military industry and national defense. However, while polymer materials bring great convenience to modern people's life, they also bring great fire safety hazards. This is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L25/06C08L23/08C08L53/02C08L77/02C08L75/04C08L67/04C08L69/00C08L23/16C08K5/5399C08K5/5313C08K3/38C08K3/34C08K3/32C08K7/24C08K7/26C08K3/22C08K3/36C08K9/10
CPCC08K3/04C08K3/22C08K3/32C08K3/34C08K3/346C08K3/36C08K3/38C08K5/5313C08K5/5399C08K7/24C08K7/26C08K9/10C08K2003/221C08K2003/222C08K2003/387C08L23/0853C08L23/12C08L69/00C08L2201/02C08L2201/22C08L2207/066C08L23/06C08L25/06C08L23/0815C08L53/02C08L53/025C08L77/02C08L75/04C08L67/04C08L23/16C08L51/06C08K13/06
Inventor 王玉忠董亮平邓聪
Owner SICHUAN UNIV
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