CN109762151A - A kind of polyester polyol and preparation method thereof for melt spun spandex - Google Patents
A kind of polyester polyol and preparation method thereof for melt spun spandex Download PDFInfo
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- CN109762151A CN109762151A CN201811599264.8A CN201811599264A CN109762151A CN 109762151 A CN109762151 A CN 109762151A CN 201811599264 A CN201811599264 A CN 201811599264A CN 109762151 A CN109762151 A CN 109762151A
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Abstract
The invention discloses a kind of polyester polyol for melt spun spandex, the polyester polyol is under the effect of the catalyst, condensation polymer made from polycondensation reaction to occur with binary acid, small molecule polyol, the polyethers of small-molecular-weight, acid or ester containing sodium sulfonate.Polyester polyol for melt spun spandex of the invention contains polyester and polyether soft segments, after melt spun spandex, so that polyurethane has the Comprehensive Characteristics of polyester and polyethers, and sodium sulfonate ionic group is introduced in strand, so that the dyeability of polyurethane greatly improves, excellent combination property.
Description
Technical field
The present invention relates to polyester polyol fields, and in particular to a kind of polyester polyol and its preparation for melt spun spandex
Method.
Background technique
The excellent performance of spandex fibre keeps its fabric comfortable and easy to wear, can be suitble to the curved needs of physical feeling, make clothes pair
The binding force very little of body, at the same fabric there are also good wrinkle resistance, without pleats, fold style-ability is permanent.Mainly
For manufacturing the sports such as various sweat shirts, swimsuit, roller-skating clothing, golf clothes；There are also suit, flying suit, work
The band of the various spe-cial-purpose uniforms such as clothes is tightly to part；It is the tight of women, gym wear, underwear, brassiere, panty hose, waistband, high-elastic
The female articles such as socks, gloves, jacket, skirt；Elastic force corduroy, Expandra, elastic force hair gabardine and hair fancy suiting clothes are used
Material；Decorative fabric fabric is wrapped up in outside furniture automotive seat；It is each that medical aspect makees surgery elastoplast, leather hose, artificial organ materials etc.
Kind auxiliary appliance equipment.
Melting spandex technique is one of current two big prevailing technology method (dry method and fusion method) of world's spandex, is in recent years
The new technology to grow up, it is few with equipment investment, production cycle is short, production procedure is simple, yield is high, at low cost, especially
Common concern of the advantages such as pollution-free by people becomes the hot spot that all big enterprises mutually study, develop, invest unexpectedly.Melt spandex
Because process flow is simple, equipment investment is low, high production efficiency, spins that speed is fast and the advantages that being easily achieved the fine-denier of spandex benefits from deeply
Family is welcome, and is not required to solvent in melting spandex production, without any emission and residue, Environmental Safety is referred to as green in the world
Color spandex, so, development prospect is generally had an optimistic view of.It twists thread for covering yarn, wrap yarn and conjunction, because spandex is several after dyeing
All covered by foreign minister's fiber, thus it is general do not have to consider spandex color whether, but direct dyes and reactive dye
Color fastness is poor (especially dark).
Spandex fibre main component polyalcohol, for being broadly divided into hydroxyl telechelic polyester and end hydroxy polyether:
Polyester-type (Ester): preferable tensile property, flexural property, abrasion resistance and solvent resistance and resistance to higher
Temperature.General hydroxyl telechelic polyester binary acid and excessive dihydric alcohol are made through mixed polycondensation, relative molecular mass 500-
5000 wax-like or liquid-state oligomers.
Polyether-type (Ether): hydrolysis and high resilience, low temperature performance well.End hydroxy polyether end hydroxy polyether is with ring
The epoxides such as oxidative ethane, propylene oxide or tetrahydrofuran are monomer, are with compounds such as propylene glycol, butanediol, glycerol
Beginning agent is reacted through cationic ring opening polymerization and is made.
Have many times, polyurethane will meet the requirement of actual performance, comprehensively consider and set cured hardness, bendability, flexible
Property etc. various performances balance, and will be in conjunction with actual cost factor, single polyester or polyether polyurethane are not able to satisfy
Actual needs, ordinary circumstance can be combined collocation by both the above or plurality of raw materials to carry out reacting obtained polyurethane.But
The polyurethane for being this preparation is simple physical constant superposition or compounding, is difficult to prepare the high polyurethane production of comprehensive performance
Product.Another, when problem present spandex, most of is all polyether-type, and dyeing is difficult.And polyester-type spandex, resilience performance are
Difference.
Acid dyeing is typically all aromatic sulfonate sodium, and containing groups such as sulfonic group, hydroxyls, minority is carboxylic acid
Sodium salt is ionized into pigment acid anion in water, can on fiber amino or amide groups combine, therefore the eggs such as hair, silk can be used for
The dyeing of white matter fiber and polyamide-based synthetic fibers and stamp.Acid dyes is bright in colour, and dyefastness is good.This kind of dyestuff is big
It is mostly dyed in Acidic Liquid, because of referred to herein as acid dyeing.
Currently, polyester polyol is all the hydrophily using sodium sulfonate, aqueous polyurethane is prepared, and utilizes the dye of sulfonate
The report that color preparation can dye spandex is seldom.
Based on the above situation, the polyester polyol and preparation method thereof that the invention proposes a kind of for melt spun spandex, can
Effectively solve problem above.
Summary of the invention
The polyester polyol and preparation method thereof that the purpose of the present invention is to provide a kind of for melt spun spandex.Of the invention
Polyester polyol for melt spun spandex contains polyester and polyether soft segments, after being applied to melt spun spandex, so that polyurethane has
There are the Comprehensive Characteristics of polyester and polyethers, and introduce sodium sulfonate ionic group in strand, so that the dyeability of polyurethane is significantly
It improves, excellent combination property:
1. higher mechanical strength and oxidation stability；
2. flexibility with higher and resilience；
3. having excellent oil resistivity, solvent resistance, water resistance；
4. having excellent dyeability.
The present invention is achieved through the following technical solutions:
A kind of polyester polyol for melt spun spandex, the polyester polyol are with binary acid, small molecule polyol, small
Under the effect of the catalyst condensation polymer made from polycondensation reaction occurs for the polyethers of molecular weight, acid or ester containing sodium sulfonate.
Polyester polyol for melt spun spandex of the invention contains polyester and polyether soft segments, is applied to melt spun spandex
Afterwards, so that polyurethane has the Comprehensive Characteristics of polyester and polyethers, and sodium sulfonate ionic group is introduced in strand, so that poly- ammonia
The dyeability of ester greatly improves, excellent combination property:
1. higher mechanical strength and oxidation stability；
2. flexibility with higher and resilience；
3. having excellent oil resistivity, solvent resistance, water resistance；
4. having excellent dyeability.
Preferably, the hydroxyl value of the polyester polyol is 110~120mgKOH/g, and acid value is 0.1~0.5mgKOH/g, point
Son amount is distributed as 1.4~2.2.
Preferably, the catalyst be butyl titanate, stannous octoate and tetraisopropyl titanate in any one or it is more
Kind.
Preferably, the binary acid is to mix to ethanedioic acid, malonic acid, succinic acid, adipic acid, decanedioic acid and phthalic acid
Close acid.
Preferably, the small molecule polyol be 1,4-butanediol, ethylene glycol, trimethylolpropane, 1,2-PD and
Any one or more in diglycol.
Preferably, the polyethers of the small-molecular-weight is polyethylene glycol polyalcohol, polypropylene glycol polyalcohol and polytetrahydrofuran
Any one or more in polyalcohol.
Preferably, the molecular weight of the polyethylene glycol polyalcohol, polypropylene glycol polyalcohol and polytetrahydrofuran polyol is equal
It is 200~1000.
Preferably, the acid or ester containing sodium sulfonate is 5-sodium sulfo isophthalate, ethylene m-phthalate -5-
Any one or more in sodium sulfonate and ethylene m-phthalate -5- sodium sulfonate.
The present invention also provides a kind of preparation methods of polyester polyol for melt spun spandex, including the following steps:
A, binary acid, small molecule polyol, the polyethers of small-molecular-weight, the acid containing sodium sulfonate or ester, catalyst are successively added
Enter in reactor, nitrogen-sealed, heating, after temperature rises to 140~150 DEG C, control reflux tower top temperature at 100~105 DEG C,
200~255 DEG C are warming up to 10~20 DEG C of heating rates hourly；
B, under the conditions of 220~225 DEG C react 2~8h, when water rate reach 90% or more or acid value be reduced to
After 30mgKOH/g or less, starts to start vacuum pump, vacuum degree is slowly improved, until acid value drops to 1.0mgKOH/g hereinafter, obtaining
The polyester polyol for melt spun spandex.
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
Polyester polyol for melt spun spandex of the invention contains polyester and polyether soft segments, is applied to melt spun spandex
Afterwards, so that polyurethane has the Comprehensive Characteristics of polyester and polyethers, and sodium sulfonate ionic group is introduced in strand, so that poly- ammonia
The dyeability of ester greatly improves, excellent combination property:
1. higher mechanical strength and oxidation stability；
2. flexibility with higher and resilience；
3. having excellent oil resistivity, solvent resistance, water resistance；
4. having excellent dyeability.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
Test method described in following embodiments or test method are unless otherwise specified conventional method；The reagent
And material is obtained from routine business approach, or prepare in conventional manner unless otherwise specified.
Molecular weight of the present invention is number-average molecular weight.
Embodiment 1:
A kind of polyester polyol for melt spun spandex, the polyester polyol are with binary acid, small molecule polyol, small
Under the effect of the catalyst condensation polymer made from polycondensation reaction occurs for the polyethers of molecular weight, acid or ester containing sodium sulfonate.
Embodiment 2:
A kind of polyester polyol for melt spun spandex, the polyester polyol are with binary acid, small molecule polyol, small
Under the effect of the catalyst condensation polymer made from polycondensation reaction occurs for the polyethers of molecular weight, acid or ester containing sodium sulfonate.
Preferably, the hydroxyl value of the polyester polyol is 110~120mgKOH/g, and acid value is 0.1~0.5mgKOH/g, point
Son amount is distributed as 1.4~2.2.
Preferably, the catalyst be butyl titanate, stannous octoate and tetraisopropyl titanate in any one or it is more
Kind.
Preferably, the binary acid is to mix to ethanedioic acid, malonic acid, succinic acid, adipic acid, decanedioic acid and phthalic acid
Close acid.
Preferably, the small molecule polyol be 1,4-butanediol, ethylene glycol, trimethylolpropane, 1,2-PD and
Any one or more in diglycol.
Preferably, the polyethers of the small-molecular-weight is polyethylene glycol polyalcohol, polypropylene glycol polyalcohol and polytetrahydrofuran
Any one or more in polyalcohol.
Preferably, the molecular weight of the polyethylene glycol polyalcohol, polypropylene glycol polyalcohol and polytetrahydrofuran polyol is equal
It is 200~1000.
Preferably, the acid or ester containing sodium sulfonate is 5-sodium sulfo isophthalate, ethylene m-phthalate -5-
Any one or more in sodium sulfonate and ethylene m-phthalate -5- sodium sulfonate.
The present invention also provides a kind of preparation methods of polyester polyol for melt spun spandex, including the following steps:
A, binary acid, small molecule polyol, the polyethers of small-molecular-weight, the acid containing sodium sulfonate or ester, catalyst are successively added
Enter in reactor, nitrogen-sealed, heating, after temperature rises to 140~150 DEG C, control reflux tower top temperature at 100~105 DEG C,
200~255 DEG C are warming up to 10~20 DEG C of heating rates hourly；
B, under the conditions of 220~225 DEG C react 2~8h, when water rate reach 90% or more or acid value be reduced to
After 30mgKOH/g or less, starts to start vacuum pump, vacuum degree is slowly improved, until acid value drops to 1.0mgKOH/g hereinafter, obtaining
The polyester polyol for melt spun spandex.
Embodiment 3
Adipic acid 4672Kg, terephthalic acid (TPA) 5312Kg, ethylene glycol 4000Kg, poly- tetrahydro furan are sequentially added into reaction kettle
Mutter polyalcohol (molecular weight 500) 300KG, 5-sodium sulfo isophthalate (5-SSIPA) 200KG, catalyst butyl titanate
1.5Kg；Nitrogen seals kettle, and control reflux tower top temperature is at 101 DEG C after being heated to 140 DEG C, with 10 DEG C of rate of heat addition liters hourly
Temperature reacts 3h under the conditions of 240 DEG C to 230 DEG C, and when water rate reaches 90% or more, unlatching vacuum pump is evacuated to acid value reduction
To 1.0mgKOH/g hereinafter, preparing hydroxyl value is 113.18mgKOH/g, acid value is the polyester polyol of 0.30mgKOH/g, molecule
Amount distribution: 1.9.
Comparative example 1
Adipic acid 4672Kg, terephthalic acid (TPA) 5312Kg, ethylene glycol 4130Kg, poly- tetrahydro furan are sequentially added into reaction kettle
Mutter polyalcohol (molecular weight 500) 300KG, catalyst butyl titanate 1.5Kg；Nitrogen seals kettle, and reflux is controlled after being heated to 140 DEG C
Tower top temperature is warming up to 230 DEG C at 101 DEG C, with 10 DEG C of rates of heat addition hourly, reacts 3h under the conditions of 240 DEG C, works as water outlet
Rate reaches 90% or more, opens vacuum pump and is evacuated to acid value and is reduced to 1.0mgKOH/g hereinafter, preparing hydroxyl value and being
114.38mgKOH/g, acid value are the polyester polyol of 0.27mgKOH/g, molecular weight distribution: 1.9.
The preparation of thermoplastic polyurethane spandex section: according to polyester polyol, (polyester of embodiment 3 and comparative example 1 is more respectively
First alcohol): Isosorbide-5-Nitrae butanediol: MDI is the molar ratio of 1:1:2, after vaccum dewatering, is squeezed into reaction twin-screw, 170 DEG C of reaction temperature,
Granulation underwater, product dry, after packaging.
The properties of product of preparation are as follows:
Embodiment 4
Sequentially add adipic acid 4600Kg, succinic acid 5512Kg into reaction kettle, ethylene glycol 3800Kg, polypropylene glycol is polynary
Alcohol (molecular weight 2000) 200KG, ethylene m-phthalate -5- sodium sulfonate (SIPE) 600KG, octoate catalyst stannous 2Kg；Nitrogen
Sealing gland kettle, control reflux tower top temperature is warming up to 230 at 105 DEG C with 10 DEG C of rates of heat addition hourly after being heated to 160 DEG C
DEG C, 3h is reacted under the conditions of 240 DEG C, when water rate reaches 90% or more, unlatching vacuum pump is evacuated to acid value and is reduced to
For 1.0mgKOH/g hereinafter, preparing hydroxyl value is 113.18mgKOH/g, acid value is the polyester polyol of 0.30mgKOH/g, molecular weight
Distribution: 1.6.
Comparative example 2
Sequentially add adipic acid 4600Kg, succinic acid 5512Kg into reaction kettle, ethylene glycol 3500Kg, polypropylene glycol is polynary
Alcohol (molecular weight 2000) 200KG, octoate catalyst stannous 2Kg；Nitrogen seals kettle, control reflux tower top temperature after being heated to 160 DEG C
At 105 DEG C, 230 DEG C are warming up to 10 DEG C of rates of heat addition hourly, reacts 3h under the conditions of 240 DEG C, when water rate reaches
90% or more, unlatching vacuum pump is evacuated to acid value and is reduced to 1.0mgKOH/g hereinafter, preparing hydroxyl value is 113.00mgKOH/
G, acid value are the polyester polyol of 0.22mgKOH/g, molecular weight distribution: 1.6.
The preparation of thermoplastic polyurethane spandex section: according to polyester polyol, (polyester of embodiment 4 and comparative example 2 is more respectively
First alcohol): Isosorbide-5-Nitrae butanediol: MDI is the molar ratio of 1:1:2, after vaccum dewatering, is squeezed into reaction twin-screw, 170 DEG C of reaction temperature,
Granulation underwater, product dry, after packaging.
The properties of product of preparation are as follows:
Embodiment 5
Sequentially add adipic acid 4872Kg, succinic acid 5702Kg into reaction kettle, ethylene glycol 3100Kg, polytetrahydrofuran is more
First alcohol (molecular weight 600) 500KG, ethylene m-phthalate -5- sodium sulfonate (SIPE) 900KG, catalyst butyl titanate
3Kg；Nitrogen seals kettle, and control reflux tower top temperature is at 104 DEG C after being heated to 150 DEG C, with 10 DEG C of rate of heat addition heatings hourly
To 230 DEG C, 3h is reacted under the conditions of 240 DEG C, when water rate reaches 90% or more, unlatching vacuum pump is evacuated to acid value and is reduced to
For 1.0mgKOH/g hereinafter, preparing hydroxyl value is 113.18mgKOH/g, acid value is the polyester polyol of 0.30mgKOH/g, molecular weight
Distribution: 2.
Comparative example 3
Adipic acid 4872Kg, succinic acid 5702Kg, ethylene glycol 3200Kg, M-phthalic acid second are sequentially added into reaction kettle
Diester -5- sodium sulfonate (SIPE) 900KG, catalyst butyl titanate 3Kg；Nitrogen seals kettle, controls reflux column after being heated to 150 DEG C
Temperature is pushed up at 104 DEG C, 230 DEG C is warming up to 10 DEG C of rates of heat addition hourly, reacts 3h under the conditions of 240 DEG C, work as water rate
Reach 90% or more, opens vacuum pump and be evacuated to acid value and be reduced to 1.0mgKOH/g hereinafter, preparing hydroxyl value and being
112.10mgKOH/g, acid value are the polyester polyol of 0.20mgKOH/g, molecular weight distribution: 2.
The preparation of thermoplastic polyurethane spandex section: according to polyester polyol, (polyester of embodiment 5 and comparative example 3 is more respectively
First alcohol): Isosorbide-5-Nitrae butanediol: MDI is the molar ratio of 1:1:2, after vaccum dewatering, is squeezed into reaction twin-screw, 170 DEG C of reaction temperature,
Granulation underwater, product dry, after packaging.
The properties of product of preparation are as follows:
Embodiment 6
Sequentially add adipic acid 4550Kg, succinic acid 5221Kg into reaction kettle, ethylene glycol 4000Kg, polytetrahydrofuran is more
First alcohol (molecular weight 300) 600KG, ethylene m-phthalate -5- sodium sulfonate (SIPE) 400KG, octoate catalyst stannous
2.5Kg；Nitrogen seals kettle, and control reflux tower top temperature is at 101 DEG C after being heated to 140 DEG C, with 10 DEG C of rate of heat addition liters hourly
Temperature reacts 3h under the conditions of 240 DEG C to 230 DEG C, and when water rate reaches 90% or more, unlatching vacuum pump is evacuated to acid value reduction
To 1.0mgKOH/g hereinafter, preparing hydroxyl value is 113.18mgKOH/g, acid value is the polyester polyol of 0.30mgKOH/g, molecule
Amount distribution: 1.8.
Comparative example 4
Sequentially add adipic acid 4550Kg, succinic acid 5221Kg into reaction kettle, ethylene glycol 4300Kg, polytetrahydrofuran is more
First alcohol (molecular weight 300) 300KG, ethylene m-phthalate -5- sodium sulfonate (SIPE) 200KG, octoate catalyst stannous
2.5Kg；Nitrogen seals kettle, and control reflux tower top temperature is at 101 DEG C after being heated to 140 DEG C, with 10 DEG C of rate of heat addition liters hourly
Temperature reacts 3h under the conditions of 240 DEG C to 230 DEG C, and when water rate reaches 90% or more, unlatching vacuum pump is evacuated to acid value reduction
To 1.0mgKOH/g hereinafter, preparing hydroxyl value is 114mgKOH/g, acid value is the polyester polyol of 0.10mgKOH/g, molecular weight
Distribution: 1.8.
The preparation of thermoplastic polyurethane spandex section: according to polyester polyol, (polyester of embodiment 6 and comparative example 4 is more respectively
First alcohol): Isosorbide-5-Nitrae butanediol: MDI is the molar ratio of 1:1:2, after vaccum dewatering, is squeezed into reaction twin-screw, 170 DEG C of reaction temperature,
Granulation underwater, product dry, after packaging.
The properties of product of preparation are as follows:
Embodiment 7
Adipic acid 4790Kg, terephthalic acid (TPA) 3600Kg, ethylene glycol 4200Kg, poly- tetrahydro furan are sequentially added into reaction kettle
Mutter polyalcohol (molecular weight 1000) 300KG, ethylene m-phthalate -5- sodium sulfonate (SIPE) 300KG, and catalyst metatitanic acid four is different
Propyl ester 2.4Kg；Nitrogen seals kettle, and control reflux tower top temperature is at 102 DEG C after being heated to 130 DEG C, with 10 DEG C of heating speed hourly
Rate is warming up to 230 DEG C, reacts 3h under the conditions of 240 DEG C, and when water rate reaches 90% or more, unlatching vacuum pump is evacuated to acid value
1.0mgKOH/g is reduced to hereinafter, preparing hydroxyl value is 113.18mgKOH/g, acid value is the polyester polyol of 0.30mgKOH/g,
Molecular weight distribution: 2.1.
Comparative example 5
Adipic acid 2400Kg, terephthalic acid (TPA) 5111Kg, ethylene glycol 4200Kg, poly- tetrahydro furan are sequentially added into reaction kettle
Mutter polyalcohol (molecular weight 1000) 300KG, ethylene m-phthalate -5- sodium sulfonate (SIPE) 300KG, and catalyst metatitanic acid four is different
Propyl ester 2.4Kg；Nitrogen seals kettle, and control reflux tower top temperature is at 102 DEG C after being heated to 130 DEG C, with 10 DEG C of heating speed hourly
Rate is warming up to 230 DEG C, reacts 3h under the conditions of 240 DEG C, and when water rate reaches 90% or more, unlatching vacuum pump is evacuated to acid value
1.0mgKOH/g is reduced to hereinafter, preparing hydroxyl value is 113.18mgKOH/g, acid value is the polyester polyol of 0.30mgKOH/g,
Molecular weight distribution: 2.1.
The preparation of thermoplastic polyurethane spandex section: according to polyester polyol, (polyester of embodiment 7 and comparative example 5 is more respectively
First alcohol): Isosorbide-5-Nitrae butanediol: MDI is the molar ratio of 1:1:2, after vaccum dewatering, is squeezed into reaction twin-screw, 170 DEG C of reaction temperature,
Granulation underwater, product dry, after packaging.
The properties of product of preparation are as follows:
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
Polyester polyol for melt spun spandex of the invention contains polyester and polyether soft segments, is applied to melt spun spandex
Afterwards, so that polyurethane has the Comprehensive Characteristics of polyester and polyethers, and sodium sulfonate ionic group is introduced in strand, so that poly- ammonia
The dyeability of ester greatly improves, excellent combination property:
1. higher mechanical strength and oxidation stability；
2. flexibility with higher and resilience；
3. having excellent oil resistivity, solvent resistance, water resistance；
4. having excellent dyeability.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit any simple modification to the above embodiments of the invention, equivalent variations, protection of the invention is each fallen within
Within the scope of.
Claims (9)
1. a kind of polyester polyol for melt spun spandex, it is characterised in that: the polyester polyol is with binary acid, small molecule
Under the effect of the catalyst polycondensation reaction contracting obtained occurs for polyalcohol, the polyethers of small-molecular-weight, acid or ester containing sodium sulfonate
Polymers.
2. the polyester polyol according to claim 1 for melt spun spandex, it is characterised in that: the polyester polyol
Hydroxyl value is 110~120mgKOH/g, and acid value is 0.1~0.5mgKOH/g, and molecular weight distribution is 1.4~2.2.
3. the polyester polyol according to claim 1 for melt spun spandex, it is characterised in that: the catalyst is metatitanic acid
Any one or more in four butyl esters, stannous octoate and tetraisopropyl titanate.
4. the polyester polyol according to claim 1 for melt spun spandex, it is characterised in that: the binary acid is to second
Diacid, malonic acid, succinic acid, adipic acid, decanedioic acid and phthalic acid mixed acid.
5. the polyester polyol according to claim 1 for melt spun spandex, it is characterised in that: the small molecule polyol
For any one or more in 1,4-butanediol, ethylene glycol, trimethylolpropane, 1,2-PD and diglycol.
6. the polyester polyol according to claim 1 for melt spun spandex, it is characterised in that: the small-molecular-weight gathers
Ether is any one or more in polyethylene glycol polyalcohol, polypropylene glycol polyalcohol and polytetrahydrofuran polyol.
7. the polyester polyol according to claim 6 for melt spun spandex, it is characterised in that: the polyethylene glycol is polynary
The molecular weight of alcohol, polypropylene glycol polyalcohol and polytetrahydrofuran polyol is 200~1000.
8. the polyester polyol according to claim 1 for melt spun spandex, it is characterised in that: the acid containing sodium sulfonate
Or ester is 5-sodium sulfo isophthalate, ethylene m-phthalate -5- sodium sulfonate and ethylene m-phthalate -5- sulfonic acid
Any one or more in sodium.
9. a kind of a kind of preparation method of the polyester polyol for melt spun spandex as claimed in any one of claims 1 to 8,
It is characterized in that, including the following steps:
A, binary acid, small molecule polyol, the polyethers of small-molecular-weight, the acid containing sodium sulfonate or ester, catalyst are sequentially added instead
It answers in device, nitrogen-sealed, heating, after temperature rises to 140~150 DEG C, control reflux tower top temperature is at 100~105 DEG C, with 10
~20 DEG C of heating rates hourly are warming up to 200~255 DEG C；
B, under the conditions of 220~225 DEG C react 2~8h, when water rate reach 90% or more or acid value be reduced to 30mgKOH/g
After below, start to start vacuum pump, slowly improve vacuum degree, until acid value drops to 1.0mgKOH/g hereinafter, obtaining described be used for
The polyester polyol of melt spun spandex.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114230753A (en) * | 2021-12-09 | 2022-03-25 | 烟台泰和新材料股份有限公司 | Preparation method of polyether ester type melt-spun spandex slice |
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| CN106480534A (en) * | 2016-10-20 | 2017-03-08 | 华峰重庆氨纶有限公司 | A kind of cation-dyeable polyurethane elastomeric fiber and preparation method thereof |
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| CN114230753A (en) * | 2021-12-09 | 2022-03-25 | 烟台泰和新材料股份有限公司 | Preparation method of polyether ester type melt-spun spandex slice |
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