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Special TPU material for encapsulation, and preparation method thereof

A technology of encapsulation and raw materials, which is applied in the field of special TPU materials for encapsulation and its preparation, can solve the problems of poor bonding strength between encapsulation materials and substrates, loss of protective effect of encapsulation sheath, and surface precipitation affecting the appearance, etc., to achieve Good protection and modification, superior soft touch, excellent melt flow properties

Inactive Publication Date: 2017-06-16
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, TPU materials for encapsulation generally have the problems of poor fluidity and narrow processing temperature window; the bonding strength between the encapsulation material and the substrate is poor, and degumming is prone to occur, resulting in the loss of protective effect of the encapsulation sheath
In addition, TPU has high requirements for color masterbatch or additives, improper selection will lead to surface precipitation and affect the appearance

Method used

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  • Special TPU material for encapsulation, and preparation method thereof
  • Special TPU material for encapsulation, and preparation method thereof
  • Special TPU material for encapsulation, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Polybutylene adipate (M=3500): 78.77g, MDI-100: 15.94g, BDO: 3.75g, antioxidant 1010 and DLTP each 0.25g, anti-yellowing agents UV-320 and 292 each 0.2 g, 0.3 g each of stearic acid amide and oleic acid amide. Add the metered polyester polyol, antioxidant, light stabilizer, and lubricant into the A reactor equipped with mechanical stirring and thermometer, and set the temperature at 100±5°C; place the diisocyanate MDI-100 in the B reaction kettle In the reactor, set the temperature at 70±5°C; place the chain extender BDO in the C reactor, set the temperature at 50±10°C; Infusion system, the raw material components in the A / B / C reactor are mixed and injected into the feed port of the twin-screw reactor through the high-speed rotating mixing head, and at the same time, the catalyst is added to the feed port of the twin-screw extruder through a micro injection pump. T-12: 0.04g, the mixed material is uniformly reacted and plasticized in the twin-screw barrel, and cut into...

Embodiment 2

[0025] Prepare according to the preparation method of Example 1.

[0026] Polyethylene adipate (M=1500): 49.2g, MDI-100: 38.29g, BDO: 10.9g, antioxidant 1010 and 168 each 0.35g, anti-yellowing agent UV-P and 292 each 0.25 g, 0.2 g each of oleic acid amide and butyl stearate, catalyst T-9: 0.01 g.

Embodiment 3

[0028] Prepare according to the preparation method of Example 1.

[0029] Polybutylene adipate (M=2500): 64.01g, MDI-100: 27g, BDO: 7.46g, 0.2g each of antioxidants 1076 and 168, 0.15g each of anti-yellowing agents UV-320 and 770 , stearic acid amide and stearic acid monoglyceride each 0.4, catalyst T-9: 0.03g.

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Abstract

The invention relates to a special TPU material for encapsulation, and a preparation method thereof, and belongs to the technical field of thermoplastic polyurethane elastomers. The special TPU material for encapsulation is prepared from, by weight, 48.6-79.3% of polymer polyol, 15.7-38.6% of diisocyanate , 3.7-11% of a chain extender, 0.3-0.8% of an antioxidant, 0.3-0.8% of a light stabilizer, 0.3-1% of a lubricant and 0.01-0.04% of a catalyst. The TPU material for encapsulation has excellent fluidity and wide processing temperature zone when used for producing encapsulation products, is simple and stable to operate, has excellent adhesion performance with various substrates, and can be mixed with various color master batch powders to form the products with different colors. The invention also provides the simple and easy preparation method of the special TPU material.

Description

technical field [0001] The invention relates to a special TPU material for encapsulation and a preparation method thereof, belonging to the technical field of thermoplastic polyurethane elastomers. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) has been widely used in automotive interiors, shoe materials, Clothing and toys and other fields. Due to its excellent elasticity, solvent resistance and oil resistance, TPU has been widely concerned and applied in the coating of special-shaped parts, such as soft-touch handle equipment, non-slip casters, electronic and electrical housing protection, elastic buttons, etc. However, at present, TPU materials for encapsulation generally have the problems of poor fluidity and narrow processing temperature window; the bonding strength between the encapsulation material and the substrate is poor, and degumming is prone to occur, resulting in the loss of protective effect of the encapsulation sheath. In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/08C08K5/20C08K5/101C08K5/103
CPCC08G18/0895C08G18/4238C08G18/664C08G18/7671C08K5/101C08K5/103C08K5/20C08K2201/014
Inventor 陈淑海宋小娜张宁贺宽宽
Owner SHANDONG INOV POLYURETHANE
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