A kind of preparation method of thermoplastic polyurethane micro-airbag elastomer material

A thermoplastic polyurethane and elastomer material technology, applied in chemical instruments and methods, chemical/physical/physical-chemical stationary reactors, chemical/physical processes, etc., can solve the problems of low yield and high energy consumption

Active Publication Date: 2018-04-13
NANTONG DE NEW MATERIAL CO LTD
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  • Abstract
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  • Application Information

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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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  • A kind of preparation method of thermoplastic polyurethane micro-airbag elastomer material
  • A kind of preparation method of thermoplastic polyurethane micro-airbag elastomer material
  • A kind of preparation method of thermoplastic polyurethane micro-airbag elastomer material

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preparation example Construction

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

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

[0054] (2), the high-molecular-weight hot melt of step (1) is pushed in the kneading extruder by twin-screw reactor outlet, continue to react, generate the high-molecular thermoplastic polyurethane melt of narrow molecular weight distribution;

[0055] (3), continue to feed the obtained polymer thermoplastic polyurethane melt into the foaming extruder, and at the same time, add polymer particle auxiliary materials, nucleating agents, and foaming agents to the foaming extruder to make the materials mix and distribute After uniformity, the melt booster pump controls the pressure and quantitatively transports it to the die head, and extrudes f...

Embodiment 1

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

[0078] Wherein, the polytetrahydrofuran ether glycol of preferred molecular weight 1000-2000 of polyol, adding weight ratio is 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%, release agent 0.05-0.5%. The polymer chain extension reaction is carried out in the twin-screw reactor to produce a linear polyurethane macromolecular polymer with a molecular weight of 100,000 to 500,000. The heating temperature of the twin-screw reactor is 180-240°C, and the rotation speed is 100-1500rpm; the rotation speed of the mixing extruder is 100-300rpm, and the heating temperature is 140-220°C.

[0079] The polymer auxiliary material is the molecular ...

Embodiment 2

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

[0084] Wherein, the polytetrahydrofuran ether glycol of preferred molecular weight 1000 left and right of polyhydric alcohol, adding weight ratio is 55%, diphenylmethane diisocyanate 35%, n-butanol 5.5%, hindered phenolic antioxidant (Ciba Irganox1010) 2%, 2% hindered amine light stabilizer, 0.5% mold release agent. The polymer chain extension reaction is carried out in the twin-screw reactor to produce a linear polyurethane macromolecular polymer with a molecular weight of about 300,000. The heating temperature of the twin-screw reactor is 180°C, and the rotation speed is 800rpm; the rotation speed of the mixing extruder is 100rpm, and the heating temperature is 140°C.

[0085] The polymer auxiliary material is the molecular weight M w About...

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Abstract

The invention relates to a preparation method of a thermoplastic polyurethane micro-airbag elastomer material, which comprises the following steps: (1) feeding liquid raw materials such as diisocyanate molecules and solid additives into a twin-screw reactor to carry out polymerization chain extension reaction to obtain high molecular weight (2) Push the high molecular weight hot melt into the mixing extruder to continue the reaction to generate a high molecular thermoplastic polyurethane melt; (3) continue to combine the obtained high molecular thermoplastic polyurethane melt with the polymer Pellets, etc. are added to the foaming extruder, and then extruded from the die head to the underwater pelletizing chamber in the form of high-pressure hot melt; (4) The pellets are carried by the process water and sent to the separation process through the multi-stage pressure release and expansion process water pipeline. Machine place, after separation, screening and drying, the target product will be formed. Compared with the prior art, the present invention can directly produce thermoplastic polyurethane elastomer materials from liquid raw materials such as MDI, which greatly reduces energy consumption and material consumption, and improves product yield and production efficiency.

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 and other fields that require high material application environments or use. Thermoplastic polyurethane elastomer itself has excellent physical properties, acid resistance, alkali resistance, low temperature elasticity, wear 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 goods. At present, the foaming and puffing of thermoplastic polyurethane elastomers for lightweighting is entering the stage of development and application. ...

Claims

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Application Information

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Patent Type & Authority Patents(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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