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Transparent high-elasticity thermoplastic polyurethane and method of producing the same

A thermoplastic polyurethane and high-elasticity technology, applied in the field of transparent high-elasticity thermoplastic polyurethane and its preparation, can solve problems such as numerous intermediate processes and complex production processes, and achieve the effects of easy control, simple production process, good transparency and elasticity

Active Publication Date: 2009-04-08
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above inventions all adopt the form of castable to obtain transparent high-elastic thermoplastic polyurethane, and then pulverize it, extrude and granulate it to obtain polyurethane particles. There are many intermediate processes and the production process is complicated.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0024] The preparation method of transparent high-elasticity thermoplastic polyurethane of the present invention comprises the following sequential steps:

[0025] (1) Dehydration of polyether polyols

[0026] Vacuum dehydrate the polyether polyol at 110-130°C for 1.5-2.5 hours, so that the moisture content of the polyol is less than 0.05%;

[0027] (2) The mixture obtained in step 1 is mixed in proportion with isocyanate, part catalyst, antioxidant, anti-yellowing agent, etc.;

[0028] (3) The mixture obtained in step 2 enters the extruder, and the remaining catalyst, small molecule chain extender and filler are added in the second zone of the extruder to continue the reaction and extrude.

[0029] The mixture enters the extruder after high-speed stirring. The extruder is a twin-screw extruder with a length-to-diameter ratio of 64:1. The reaction time of the material in the extruder is 0.5-5min, and the reaction temperature is 150-200°C. The temperature setting of the extru...

Embodiment 1

[0035] 2000g of polytetrahydrofuran diol was vacuum dehydrated at 120°C for 2h to make the moisture content less than 0.05%.

[0036] Put the above mixture together with 500.48g MDI, 0.25g dibutyltin dilaurate, 0.25g triethylamine, 1.0g1010, 1.0gUV327 into the high-speed mixing head, and add 20g nano TiO at the same time 2 , the particle size is 5-10nm, at a speed of not less than 3000r / min, especially 3500r / min, stirring for 0.5-1min, so that the mixture continuously flows into the extruder for reaction.

[0037]The extruder is a twin-screw extruder with a length-to-diameter ratio of 64:1 and a reaction temperature of 150-200°C. The control temperatures of the extruder section are: 90±5°C for the first zone and 150±5°C for the second zone , the third zone 170±5℃, the fourth zone 175±5℃, the fifth zone 180±5℃, the sixth zone 180±5℃, the seventh zone 180±5℃, the eighth zone 180±5℃, the Zone 9 180±5℃, Zone 10 180±5℃, Zone 11 180±5℃, Zone 12 180±5℃, Zone 13 180±5℃, Zone 14 185±5...

Embodiment 2

[0039] 2000g of polyoxypropylene diol was vacuum dehydrated at 120°C for 2h to make the moisture content less than 0.05%.

[0040] Put the above mixture together with 348.24g of TDI, 0.25g of dibutyltin dilaurate, 0.25g of triethylenediamine, 1.0g of 1076, 1.0g of UV531, 1.0g of talcum powder, etc. into the high-speed mixing head, and stir at a speed of 3500r / min for 0.5 min, so that the mixture continuously flows into the extruder for reaction, the control temperature of the extruder section is: 90±5°C, 150±5°C, 170±5°C, 175±5°C, 180±5°C, 180±5°C ℃, 180±5℃, 180±5℃, 180±5℃, 180±5℃, 180±5℃, 180±5℃, 180±5℃, 185±5℃, 175±5℃, 165±5℃ ℃, when the material flows through the second zone, start to add 62.07g ethylene glycol, 0.25g dibutyltin dilaurate, and 0.25g triethylenediamine according to the flow ratio, and the time for the material to flow through the extruder is 2.5min. The required time is 10 minutes, and the mixture of ethylene glycol, dibutyltin dilaurate and triethylenediam...

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PUM

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Abstract

The invention relates to a transparent, high-elasticity and thermoplastic polyurethane and a preparation method thereof. The formula thereof by weight is as follows: 70 portions to 90 portions of polyether polyol, 3 portions to 20 portions of small molecular chain extender, 10 portions to 30 portions of diisocyanate, 0.1 portion to 0.5 portion of catalyst, 0 portion to 1.0 portion of antioxidant, 0 portion to 1.0 portion of yellowing resistant agent and 0 portion to 20 portions of other filler. An extruder method is adopted for production. The products can be applied to transparent shoulder straps, clothes, documentation material for shoes and the like.

Description

technical field [0001] The invention relates to a transparent high-elasticity thermoplastic polyurethane and a preparation method thereof, in particular to a transparent high-elasticity thermoplastic polyurethane raw material applied to transparent shoulder straps and a preparation method for producing the material. Background technique [0002] Polyurethane is a linear or slightly branched and cross-linked polymer material polymerized from oligomer diols, diisocyanates and low molecular weight diols or diamines. The integrity of polyurethane, including elasticity and clarity, depends on the type of polyol and isocyanate, including the molecular weight of the polyurethane and the chemical structure of the polyurethane backbone, the degree of crosslinking, crystallinity, and phase separation in the polyurethane. It is generally understood that in order to enhance optical clarity, polymers should generally have low crystalline content and / or low or no macroscopic phase separat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/10C08L75/08C08K5/134C08K5/3475C08K3/22C08K5/132C08K3/34
Inventor 靳东杰唐舫成汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS
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