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Method for modifying hollow glass microspheres by ionic liquid and flame-retardant thermoplastic polyurethane elastomer using it as flame retardant

The technology of hollow glass microspheres and thermoplastic polyurethane is applied in the field of flame retardant modification of thermoplastic polyurethane elastomer, which can solve the problems of low flame retardant efficiency, large addition amount, and large heat release of thermoplastic polyurethane elastomer, so as to improve the flame retardancy. Effects of performance, small vapor pressure, and wide electrochemically stable potential window

Active Publication Date: 2019-03-05
JIANGSU STERRIC CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is: in view of the special structure and good performance of hollow glass microspheres, and the application of ionic liquids in improving the combustion performance of materials, to provide a method for modifying hollow glass microspheres with ionic liquids and using them as flame retardants The flame-retardant thermoplastic polyurethane elastomer solves the disadvantages of large addition amount, low flame-retardant efficiency and large heat release of thermoplastic polyurethane elastomer when hollow glass microspheres are used alone as a flame retardant in the prior art, and improves the resistance of thermoplastic polyurethane elastomer. Flammability

Method used

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  • Method for modifying hollow glass microspheres by ionic liquid and flame-retardant thermoplastic polyurethane elastomer using it as flame retardant
  • Method for modifying hollow glass microspheres by ionic liquid and flame-retardant thermoplastic polyurethane elastomer using it as flame retardant
  • Method for modifying hollow glass microspheres by ionic liquid and flame-retardant thermoplastic polyurethane elastomer using it as flame retardant

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Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0038] [ EOOEMIm][PF 6 ]) Modified hollow glass microspheres, at room temperature, control the rotational speed at 10-50r / min, and banbury for 10min; press the obtained material with a flat vulcanizing machine, control the temperature at 175-180°C, and hold the pressure for 10-20min , cooled for 1-2min to obtain the product; cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The standard size of the oxygen index, UL94, cone calorimeter experiment (radiation power 35kW / m 2 ), its limiting oxygen index is 23.75, the vertical combustion level can reach UL94V-1, and the peak heat release rate (PHRR) is 779.33kW / m 2 , the remaining mass is (MASS) 7.21%, and the total heat release (THR) is 108.80MJ / m 2 , the total smoke production (TSR) is 828.83 m 2 / m 2 .

Embodiment 1-2

[0039] [ EOOEMIm][PF 6 ]) Modified hollow glass microspheres, at room temperature, control the rotational speed at 10-50r / min, and banbury for 10min; press the obtained material with a flat vulcanizing machine, control the temperature at 175-180°C, and hold the pressure for 10-20min , cooled for 1-2min to obtain the product; cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The size of the oxygen index, UL94, cone calorimeter experiment (radiation power 35kW / m 2 ), its limiting oxygen index is 23.75, the vertical combustion level can reach UL94V-1, and the peak heat release rate (PHRR) is 675.53kW / m 2 , the remaining mass is (MASS) 9.64%, and the total heat release (THR) is 104.14MJ / m 2 , the total smoke production (TSR) is 825.56 m 2 / m 2 .

Embodiment 1-3

[0040] Example 1-3: 99.5% of the thermoplastic polyurethane elastomer was added to the internal mixer for internal mixing for 3 minutes according to the mass percentage, and 0.5% 1-acetate-3-methylimidazolium hexafluorophosphate was added in the mass percentage ([EOOEMIm][PF 6 ]) Modified hollow glass microspheres, at room temperature, control the rotational speed at 10-50r / min, and banbury for 10min; press the obtained material with a flat vulcanizer, control the temperature at 175-180°C, and hold the pressure for 10-20min , cooled for 1-2min to obtain the product; cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The standard size of the oxygen index, UL94, cone calorimeter experiment (radiation power 35kW / m 2 ), its limiting oxygen index is 24.50, the vertical combustion level can reach UL94V-1, and the peak heat release rate (PHRR) is 577.55kW / m 2 , the remaining mass is (MASS) 10.42%, and the total heat release (THR) is 103.18MJ / m 2 , the total smoke production...

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Abstract

The invention discloses a method of modifying hollow glass microbeads with an ionic liquid and a flame-retarding thermoplastic polyurethane elastomer with the modified hollow glass microbeads as a flame retardant. The method includes the steps of: 1) treating the hollow glass microbeads with a hydrochloric acid solution; 2) after the acid treatment, repeatedly washing and drying the hollow glass microbeads; 3) activating the hollow glass microbeads, adding a silane coupling agent, and performing mechanical stirring reflux; 4) stopping the reaction and cooling the reaction product to room temperature, and performing suction filtration with acetonitrile, ethanol and deionized water and drying the reaction product; 5) adding the ionic liquid to the silanized hollow glass microbeads and performing mechanical stirring reflux; 6) stopping the reaction and cooling the reaction product to room temperature, performing suction filtration successively with ethanol, a mixed solution of ethanol and deionized water, and ethanol, and drying the reaction product. By means of the hollow glass microbeads modified with the ionic liquid as the flame retardant for preparing flame-retarding thermoplastic polyurethane (TPU) elastomer, not only is oxygen index of the composite material improved, but also the vertical combustion performance, which reflects melt-dripping resistance, is improved, so that heat release rate is reduced and smoke is significantly inhibited.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant modification of thermoplastic polyurethane elastomers, in particular to a method for modifying hollow glass microspheres by ionic liquids, and the use of modified hollow glass microspheres in the preparation of flame-retardant thermoplastic polyurethane elastomer composite materials Applications. Background technique [0002] Thermoplastic polyester elastomer (TPU) is known as "an epoch-making new polymer material" and is one of the six most promising synthetic materials in the world. It has both the processing performance of plastic and the physical and mechanical properties of rubber. It has high strength, high elasticity, high wear resistance, oil resistance, low temperature brittleness resistance, radiation resistance, and the hardness can be adjusted in a wide range. Performance, has been widely used in aerospace, medical and health, agriculture, animal husbandry and food industries....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K9/02C08K9/06C08K9/04C08K7/28C08L75/04
CPCC08K7/28C08K9/02C08K9/04C08K9/06C08K9/10C08L2201/02C08L2207/04C08L75/04
Inventor 陈希磊孙立水李娟凌坤华范阳海吴建康
Owner JIANGSU STERRIC CHEM IND
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