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Preparation method of phthalic anhydride polyalcohol for synthesis of thermoplastic polyurethane (TPU)

A thermoplastic polyurethane and polyol technology, applied in the field of preparation of phthalic anhydride polyol, can solve the problems of inability to meet the application requirements of thermoplastic polyurethane, poor heat resistance, yellowing resistance and hydrolysis resistance, etc. Variable performance, high gloss effect

Inactive Publication Date: 2013-09-18
安庆市索隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, commercially available phthalic anhydride polyols are used to produce thermoplastic polyurethane (TPU), which mainly has poor heat resistance, yellowing resistance, and hydrolysis resistance, which cannot meet the application requirements of thermoplastic polyurethane (TPU).

Method used

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  • Preparation method of phthalic anhydride polyalcohol for synthesis of thermoplastic polyurethane (TPU)
  • Preparation method of phthalic anhydride polyalcohol for synthesis of thermoplastic polyurethane (TPU)
  • Preparation method of phthalic anhydride polyalcohol for synthesis of thermoplastic polyurethane (TPU)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Phthalic anhydride polyols for the synthesis of thermoplastic polyurethane materials are prepared using the following raw materials in parts by weight:

[0031] Phthalic anhydride

250 copies

1,4-Butanediol

500 copies

Adipic acid

480 copies

Triphenyl phosphite

5 copies

[0032] The preparation method steps are as follows:

[0033] ①. Put the raw materials into the reaction kettle according to the parts by weight, pass nitrogen gas under the liquid surface, stir and heat up;

[0034] ②. When the feed temperature reaches 90°C, start the fractionation operation, and set the temperature of the fractionation tower at 99-101°C;

[0035] ③. Continue the fractionation operation and slowly heat up;

[0036] ④. When the temperature of the material rises to 140-150°C, keep it warm for 2 hours;

[0037] ⑤. Then heat up to 240°C at a constant speed for 2 hours, then add 10 parts of auxiliary agent (triphenyl phosphite, consisten...

Embodiment 2

[0043] Phthalic anhydride polyols for the synthesis of thermoplastic polyurethane materials are prepared using the following raw materials in parts by weight:

[0044] Phthalic anhydride

[0045] The preparation method is the same as in Example 1.

Embodiment 3

[0047] Phthalic anhydride polyols for the synthesis of thermoplastic polyurethane materials are prepared using the following raw materials in parts by weight:

[0048] Phthalic anhydride

[0049] The preparation method is the same as in Example 1.

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Abstract

The invention relates to a preparation method of a phthalic anhydride polyalcohol and particularly discloses a preparation method of a phthalic anhydride polyalcohol for synthesis of thermoplastic polyurethane (TPU). The phthalic anhydride polyalcohol is prepared from phthalic anhydride, a dihydric alcohol, a dibasic acid and an additive. Compared with the prior art, because the optimal components are used for combined, the yellowing properties of the phthalic anhydride polyalcohol is greatly improved, the synthesized TPU has good yellowing resistance and high gloss and can be better applied to the filed of shoe materials, garment, inflatable toys, overwater and underwater sports equipment, medical equipment, fitness equipment, automobile eat materials, umbrellas, luggages and bags.

Description

technical field [0001] The invention relates to a preparation method of phthalic anhydride polyol, in particular, the invention discloses a preparation method of phthalic anhydride polyol used for synthesizing thermoplastic polyurethane (TPU) materials. Background technique [0002] Thermoplastic polyurethane (TPU) is made of raw materials such as isocyanate (MDI) containing NCO functional groups and polyol (POLYOL) containing OH functional groups through extrusion and mixing. Due to its good elasticity, good physical properties, and various mechanical strengths Therefore, it is widely used in processing methods such as injection, extrusion, calendering and dissolving into solution resins. It is a plastic material often used by plastic processing industry, and its products cover the range of industrial applications and civilian necessities. [0003] Thermoplastic polyurethane (TPU) is increasingly popular due to its superior performance and environmental protection concept. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/181C08G18/42
Inventor 李大光
Owner 安庆市索隆新材料有限公司