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Polyester polyol for melt-spun polyurethane and preparation method of polyester polyol

A technology of polyester polyols and polyols, applied in the field of polyester polyols, to achieve the effects of high flexibility and resilience, excellent oil resistance, and excellent dyeing properties

Pending Publication Date: 2019-05-17
浙江吉仑高分子材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, polyester polyols use the hydrophilicity of sodium sulfonate to prepare water-based polyurethane, but there are few reports on the preparation of dyeable spandex by using the dyeability of sulfonate

Method used

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  • Polyester polyol for melt-spun polyurethane and preparation method of polyester polyol
  • Polyester polyol for melt-spun polyurethane and preparation method of polyester polyol
  • Polyester polyol for melt-spun polyurethane and preparation method of polyester polyol

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A kind of polyester polyol used for melt-spinning spandex, said polyester polyol is based on dibasic acid, small molecule polyol, polyether with small molecular weight, acid or ester containing sodium sulfonate, under the action of catalyst , The condensation polymer produced by polycondensation reaction.

Embodiment 2

[0045] A kind of polyester polyol used for melt-spinning spandex, said polyester polyol is based on dibasic acid, small molecule polyol, polyether with small molecular weight, acid or ester containing sodium sulfonate, under the action of catalyst , The condensation polymer produced by polycondensation reaction.

[0046] Preferably, the polyester polyol has a hydroxyl value of 110-120 mgKOH / g, an acid value of 0.1-0.5 mgKOH / g, and a molecular weight distribution of 1.4-2.2.

[0047] Preferably, the catalyst is any one or more of tetrabutyl titanate, stannous octoate and tetraisopropyl titanate.

[0048] Preferably, the dibasic acid is a mixed acid of tereoxalic acid, malonic acid, succinic acid, adipic acid, sebacic acid and phthalic acid.

[0049] Preferably, the small molecular polyol is any one or more of 1,4-butanediol, ethylene glycol, trimethylolpropane, 1,2-propanediol and diethylene glycol.

[0050] Preferably, the low molecular weight polyether is any one or more of...

Embodiment 3

[0057] In the reactor, add 4672Kg of adipic acid, 5312Kg of terephthalic acid, 4000Kg of ethylene glycol, polytetrahydrofuran polyol (molecular weight 500) 300KG, 200KG of isophthalic acid-5-sodium sulfonate (5-SSIPA), catalyst Tetrabutyl titanate 1.5Kg; seal the kettle with nitrogen, control the reflux tower top temperature at 101°C after heating to 140°C, raise the temperature to 230°C at a heating rate of 10°C per hour, and react at 240°C for 3 hours. When it reaches more than 90%, turn on the vacuum pump to evacuate until the acid value drops below 1.0mgKOH / g, and prepare a polyester polyol with a hydroxyl value of 113.18mgKOH / g and an acid value of 0.30mgKOH / g, with a molecular weight distribution of 1.9.

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Abstract

The invention discloses polyester polyol for melt-spun polyurethane. Polyester polyol is a polycondensate prepared from dibasic acid, small molecular polyol, polyether with small molecular weight andacid or ester containing sodium sulfonate by a polycondensation reaction under the action of a catalyst. Polyester polyol for melt-spun polyurethane contains polyester and polyether flexible segments,and after polyester polyol is applied to melt-spun polyurethane, polyurethane has the comprehensive characteristics of polyester and polyether, and sodium sulfonate ion groups are introduced into molecular chains, so that dyeability of polyurethane is greatly improved, and the comprehensive performance is excellent.

Description

technical field [0001] The invention relates to the field of polyester polyols, in particular to a polyester polyol used for melt spinning spandex and a preparation method thereof. Background technique [0002] The excellent performance of spandex fiber makes the fabric comfortable to wear, suitable for the bending of body parts, and makes the clothing have little binding force on the body. At the same time, the fabric has good wrinkle resistance, no wrinkle, and permanent wrinkle setting ability. constant. Mainly used in the manufacture of various sportswear, swimming suits, skating suits, golf and other sportswear; there are also belt-tight parts of various special clothing such as space suits, flight suits, work clothes, etc.; women's tights, bodybuilding clothes , underwear, bras, pantyhose, girdle, high elastic socks, gloves, jackets, skirts and other women's products; elastic corduroy, elastic denim, elastic wool gabardine and wool tweed clothing materials; decorative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/78D01F6/70D01F6/78
Inventor 吴李明吴键儒
Owner 浙江吉仑高分子材料股份有限公司