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Preparation method of thermoplastic polyurethane micro air bag elastomer material

A technology of thermoplastic polyurethane and elastomer materials, applied in chemical instruments and methods, chemical/physical/physicochemical fixed reactors, chemical/physical processes, etc., can solve problems such as high energy consumption and low yield

Active Publication Date: 2017-11-24
NANTONG DE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the disadvantages of material degradation caused by multi-process manufacturing of thermoplastic polyurethane foamed elastomers in the market, high energy consumption, low yield, etc., this patent combines thermoplastic polyurethane micro-airbag elastomers with one-step polymerization reaction, and masters direct production from liquid raw materials. Process and formula for preparing thermoplastic polyurethane micro-airbag expanded elastomer

Method used

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  • Preparation method of thermoplastic polyurethane micro air bag elastomer material
  • Preparation method of thermoplastic polyurethane micro air bag elastomer material
  • Preparation method of thermoplastic polyurethane micro air bag elastomer material

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preparation example Construction

[0052] A preparation method of thermoplastic polyurethane micro airbag elastomer material includes the following steps:

[0053] (1) Feeding liquid raw materials including diisocyanate molecules and polyols and solid additives into a twin-screw reactor to perform polymerization chain extension reaction to obtain a high molecular weight hot melt;

[0054] (2) Push the high molecular weight hot melt of step (1) from the outlet of the twin-screw reactor into the mixing extruder to continue the reaction to generate a polymer thermoplastic polyurethane melt with a narrow molecular weight distribution;

[0055] (3). Continue to feed the obtained polymer thermoplastic polyurethane melt into the foaming extruder. At the same time, add polymer particle auxiliary materials, nucleating agent and foaming agent to the foaming extruder to mix and distribute the materials After homogenization, the pressure is controlled and quantitatively delivered to the die by the melt booster pump, and extruded ...

Embodiment 1

[0077] According to the above as figure 1 The process flow of preparing the heat-damaged polyurethane micro airbag elastomer material of the present invention according to the following raw material formula and process conditions:

[0078] Among them, the polyol is preferably polytetrahydrofuran ether glycol with a molecular weight of 1000-2000, added in a weight ratio of 55-70%, diphenylmethane diisocyanate 20-35%, n-butanol 5-15%, hindered phenolic antioxidant ( Ciba Irganox 1010) 0.5-2%, hindered amine light stabilizer 0.5-2%, mold release agent 0.05-0.5%. The polymer chain extension reaction is carried out in a double screw reactor to produce linear polyurethane macromolecular polymers with a molecular weight of 100,000 to 500,000. The heating temperature of the twin-screw reactor is 180-240℃, and the rotating speed is 100-1500rpm; the rotating speed of the mixing extruder is 100-300rpm, and the heating temperature is 140-220℃.

[0079] Polymer excipients are molecular weight ...

Embodiment 2

[0083] According to the above as figure 1 The process flow of preparing the heat-damaged polyurethane micro airbag elastomer material of the present invention according to the following raw material formula and process conditions:

[0084] Among them, the polyol is preferably polytetrahydrofuran ether glycol with a molecular weight of about 1000, and the weight ratio is 55%, diphenylmethane diisocyanate 35%, n-butanol 5.5%, hindered phenolic antioxidant (Ciba Irganox 1010) 2%, Hindered amine light stabilizer 2%, release agent 0.5%. The polymer chain extension reaction is carried out in a twin-screw reactor to produce linear polyurethane macromolecular polymers with a molecular weight of about 300,000. The heating temperature of the twin-screw reactor is 180°C and the rotating speed is 800 rpm; the rotating speed of the mixing extruder is 100 rpm and the heating temperature is 140°C.

[0085] Polymer excipients are molecular weight M w About 80,000 polyether thermoplastic polyureth...

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Abstract

The invention relates to a preparation method of a thermoplastic polyurethane micro air bag elastomer material. The preparation method comprises the following steps of (1) feeding liquid raw materials such as diisocyanate molecules and a solid additive into a twin screw reactor, and carrying out polymerization chain extending reaction to obtain a high molecular weight hot melt; (2) pushing the high molecular weight hot melt into a mixing extrusion molding machine, and carrying out continuous reaction to produce a macromolecular thermoplastic polyurethane melt; (3) continuously adding the obtained macromolecular thermoplastic polyurethane melt, polymer particles and the like in a foaming extrusion molding machine, and then extruding the material from a mold head to an underwater pelletizing chamber in a form of a high-pressure hot melt; and (4) carrying pelletization by process water, sending the pellet-carrying process water to a separation machine by a multi-stage pressure relief and expansion process water pipeline, and carrying out separation, screening and drying to obtain a target product. Compared with the prior art, by adopting the preparation method provided by the invention, the thermoplastic polyurethane elastomer material can be directly prepared from the liquid raw materials such as MDI, so that the energy consumption and the material consumption are greatly lowered, the yield of a product is increased, the production efficiency of the product is improved and the like.

Description

Technical field [0001] The invention relates to the field of preparation of thermoplastic polyurethane elastomer materials, in particular to a preparation method of thermoplastic polyurethane micro airbag elastomer materials. Background technique [0002] Thermoplastic polyurethane elastic materials are widely used in automobiles, shoe materials, oil pipes, water pipes, cables, films, etc., which require high material application environment or use. Thermoplastic polyurethane elastomer itself has excellent physical properties, acid resistance, alkali resistance, low temperature elasticity, abrasion resistance, transparency, and easy coloring. With the society's demand for environmental protection, energy saving, and consumption reduction, lightweight materials have become a major trend in consumables and consumer products. At present, the foaming and expansion of thermoplastic polyurethane elastomers for lightweighting is entering the development and application stage. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08L77/00C08L67/00C08L27/06C08L51/00C08K7/24C08K3/26C08K3/36C08K3/34C08K3/04C08K5/02C08J9/14C08J9/12C08G18/76C08G18/48C08G18/42B29B9/06
CPCC08G18/42C08G18/4854C08G18/7671C08J9/122C08J9/141C08L75/06C08L75/08B29B9/065C08K2003/265C08K2201/011C08J2475/08C08L2205/24C08L2205/025C08J2375/08C08J2375/06C08J2203/06C08J2203/182C08J2203/14C08K3/26C08K3/36C08K3/34C08K3/04C08K5/02C08K7/24C08L77/00C08L67/00C08L27/06C08L51/003C08L51/006B29B9/12C08G18/4238C08G18/3206C08G18/667B01J19/20C08J9/16B29C48/40C08J9/0095B01J19/0013B01J2219/00162C08J2205/044C08J2375/04C08J2300/22C08J2300/26C08J9/0061C08J9/0066B29C48/92B29C48/0012B29C48/67B29C48/345B29C48/022B29C48/515B29K2075/00B29K2105/041
Inventor 陈乔健郭杨龙
Owner NANTONG DE NEW MATERIAL CO LTD
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