CN103289056A - Method for producing high-hydroscopicity soft polyurethane foam through bamboo fiber polyhydric alcohol - Google Patents
Method for producing high-hydroscopicity soft polyurethane foam through bamboo fiber polyhydric alcohol Download PDFInfo
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Abstract
The invention relates to a method for producing high-hydroscopicity soft polyurethane foam through bamboo fiber polyhydric alcohol. The method includes the following steps: 1, adding concentrated sulfuric acid into polyethylene glycol and glycerol, raising temperature, adding bamboo fibers to fully react, adding sodium hydroxide into the mixture after reaction to adjust pH(potential of hydrogen) value to be in the range of 6.5-7.5, and obtaining the bamboo fiber polyhydric alcohol; 2, taking and mixing ingredients including, by weight, 5-45 parts of the bamboo fiber polyhydric alcohol, 55-95 parts of the polyether polyol, 1-1.5 parts of water, 0.2-0.4 part of stannous octoate, 0.12-0.16 part of triethylene diamine, 1-4 parts of foam stabilizing agents, 2.5-5 parts of physical foaming agents, 5-7 parts of trepanning agents, 2.5-7.5 parts of triethanolamine, and mixing and foaming the mixture with 26-66 parts of toluene diisocyanate. A hydrophilic structure in the bamboo fiber polyhydric alcohol is utilized, so that the soft polyurethane foam with high hydroscopicity and water retaining capacities is produced successfully.
Description
Technical field
The present invention relates to the method that a kind of bamboo fibers polyvalent alcohol prepares high suction flexible PU foam.
Background technology
Porous plastics is one of principal item of polyurethane synthetic material, all is widely used at aspects such as furniture, bed accessory, transportation, refrigerations.The used main raw material of urethane foam is organic isocyanate, polyol compound and auxiliary agent.Polyether glycol belongs to non-renewable petroleum resources, and in recent years, plant liquefaction polyvalent alcohol replacement polyether glycol prepares polyurethane material and caused concern widely.
The bamboo resource of China is very abundant, bamboo class area accounts for about 1/3 of world's bamboo class area, the bamboo growth cycle is short, 2-3 can be become a useful person and disposable plantation is managed for a long time, bamboo fibers mainly contains three kinds of bamboo fiber, bamboo pulp fiber and bamboo-carbon fibres, and to be the chip that will produce in the wood working process remove impurity such as wherein xylogen, pectin, vinifera palm oil by mechanical means and biotechnology to the used bamboo fibers of this experiment makes.
The bamboo fibers polyvalent alcohol is made by bamboo fibers liquefaction, contains abundant hydroxyl and ethylene oxide segment through characterizing it, therefore adds the polyurethane foam that part bamboo fibers polyvalent alcohol can make a kind of high suction and quality softness in common polyether glycol.The height suction flexible PU foam that this method makes is having very big application prospect aspect medical and health, the industrial cleaning.
Summary of the invention
The object of the present invention is to provide a kind of bamboo fibers polyvalent alcohol to prepare the method for high suction flexible PU foam, overcoming the shortcoming that exists in the existing preparation high-hydroscopicity polyurethane foam method, and improve the degradability of polyurethane foamed material.
The detailed process of a kind of high suction flexible polyurethane foams of preparation proposed by the invention is as follows:
(1): one or more and glycerol in the polyoxyethylene glycol of number-average molecular weight 200 ~ 600 are mixed, add the vitriol oil after being warming up to 150 ℃, stir 10 ~ 20min, add the bamboo fibers that is dried to constant weight again, continue reaction 2h;
(2): add the liquefied product of sodium hydroxide regulating step (1) gained, make that the pH of final liquefied product is 7, namely obtain the bamboo fibers polyvalent alcohol;
(3): the bamboo fibers polyvalent alcohol of 5 ~ 45 weight parts, the polyether glycol of 55 ~ 95 weight parts, the water of 1 ~ 1.5 weight part, the stannous octoate of 0.2 ~ 0.4 weight part, the triethylene diamine of 0.12 ~ 0.16 weight part, the suds-stabilizing agent of 1 ~ 4 weight part, the pneumatogen of 2.5 ~ 5 weight parts, the pore-creating agent of 5 ~ 7 weight parts, the trolamine of 2.5 ~ 7.5 weight parts, the tolylene diisocyanate of 26 ~ 66 weight parts are mixed under homogenizer, namely make the high-hydroscopicity flexible PU foam after the foaming.
Bamboo fibers described in the step (1) is mao bamboon fiber or cizu fiber.
Tolylene diisocyanate component described in the step (3) is a kind of or its mixture in 2,4 toluene diisocyanate and 2, the 6-tolylene diisocyanate.
Polyether glycol described in the step (3) is polyethers GEP-330N or polyethers GEP-560S.
The present invention has the following advantages:
This preparation method is simple, the bamboo fibers polyvalent alcohol that makes by aforesaid method contains great amount of hydroxy group and ethylene oxide chain link, not only make the bamboo fibers polyvalent alcohol to participate in reaction as one of polyethers component, and the ethylene oxide chain link has great wetting ability, polyurethane foam by the preparation of this method is the quality softness not only, and water-intake rate height, water-retaining capacity is big, not only avoid in the polyoxyethylene polyvalent alcohol of synthesizing isocyanate end-blocking the phenomenon of gel easily, and overcome the shortcoming that polyurethane foam that direct filling super absorbent resin makes can not be recycled.
Embodiment
Now in conjunction with comparative example and specific embodiment content of the present invention is described in detail.
The material umber all by weight among the following comparative example of the present invention and the embodiment.
The comparative example 1
The ordinary soft polyurethane foam is main raw material with polyether glycol GEP-330N, TDI 80/20, adopts single stage method to produce foam, is made by the raw material of following mass fraction:
The foam water-intake rate that makes is 650%, and water-retaining capacity is 0.67g/g, and tensile strength is 45KPa, and density is 43.7kg/m
3
Embodiment 1
(a): be that 400 polyoxyethylene glycol and the glycerol of 90g mix with the number-average molecular weight of 200g, be warming up to 150 ℃, the vitriol oil that adds 9g then mixes, and the time is 10 ~ 20 minutes, then add the mao bamboon fiber that 50g is dried to constant weight and react, the time is 2h.
(b): add the liquefied product of sodium hydroxide regulating step (a) gained, make that the pH of final liquefied product is 6.5 ~ 7.5, namely obtain mao bamboon fiber polyvalent alcohol.
(c): high suction flexible PU foam is main raw material with mao bamboon fiber polyvalent alcohol, polyether glycol GEP-330N, TDI 80/20, adopts single stage method to produce foam, is made by the raw material of following mass fraction:
The foam water-intake rate that makes is 1304%, and water-retaining capacity is 1.2g/g, and tensile strength is 43KPa, and density is 45.1kg/m
3
Embodiment 2
(a): be that 200 polyoxyethylene glycol and the glycerol of 200g mix with the number-average molecular weight of 200g, be warming up to 150 ℃, the vitriol oil that adds 8g then mixes, and the time is 10 ~ 20 minutes, then add the mao bamboon fiber that 40g is dried to constant weight and react, the time is 2h.
(b): add the liquefied product of sodium hydroxide regulating step (a) gained, make that the pH of final liquefied product is 6.5 ~ 7.5, namely obtain mao bamboon fiber polyvalent alcohol.
(c): high suction flexible PU foam is main raw material with mao bamboon fiber polyvalent alcohol, polyether glycol GEP-330N, TDI 80/20, adopts single stage method to produce foam, is made by the raw material of following mass fraction:
The foam water-intake rate that makes is 1536%, and water-retaining capacity is 4.95g/g, and tensile strength is 41KPa, and density is 46.8kg/m
3
Embodiment 3
(a): be that 600 polyoxyethylene glycol and the glycerol of 40g mix with the number-average molecular weight of 360g, be warming up to 150 ℃, the vitriol oil that adds 4g then mixes, and the time is 10 ~ 20 minutes, then add the mao bamboon fiber that 50g is dried to constant weight and react, the time is 2h.
(b): add the liquefied product of sodium hydroxide regulating step (a) gained, make that the pH of final liquefied product is 6.5-7.5, namely obtain mao bamboon fiber polyvalent alcohol.
(c): high suction flexible PU foam is main raw material with mao bamboon fiber liquefaction polyvalent alcohol, polyether glycol GEP-330N, TDI 65/35, adopts single stage method to produce foam, is made by the raw material of following mass fraction:
The foam water-intake rate that makes is 1895%, and water-retaining capacity is 8.06g/g, and tensile strength is 38KPa, and density is 47.9kg/m
3
Embodiment 4
(a): be that 400 polyoxyethylene glycol and the glycerol of 90g mix with the number-average molecular weight of 210g, be warming up to 150 ℃, the vitriol oil that adds 9g then mixes, and the time is 10 ~ 20 minutes, then add the mao bamboon fiber that 50g is dried to constant weight and react, the time is 2h.
(b): add the liquefied product of sodium hydroxide regulating step (a) gained, make that the pH of final liquefied product is 6.5 ~ 7.5, namely obtain mao bamboon fiber polyvalent alcohol.
(c): high suction flexible PU foam is main raw material with mao bamboon fiber liquefaction polyvalent alcohol, polyether glycol GEP-330N, TDI 80/20, adopts single stage method to produce foam, is made by the raw material of following mass fraction:
The foam water-intake rate that makes is 2293%, and water-retaining capacity is 11.56g/g, and tensile strength is 39KPa, and density is 52.5kg/m
3
Embodiment 5
(a): be that 400 polyoxyethylene glycol and the glycerol of 90g mix with the number-average molecular weight of 210g, be warming up to 150 ℃, the vitriol oil that adds 9g then mixes, and the time is 10 ~ 20 minutes, then add the cizu fiber that 50g is dried to constant weight and react, the time is 2h.
(b): add the liquefied product of sodium hydroxide regulating step (a) gained, make that the pH of final liquefied product is 6.5 ~ 7.5, namely obtain cizu fiber polyvalent alcohol.
(c): high suction flexible PU foam is main raw material with cizu fiber liquefaction polyvalent alcohol, polyether glycol GEP-330N, TDI 80/20, adopts single stage method to produce foam, is made by the raw material of following mass fraction:
The foam water-intake rate that makes is 2313%, and water-retaining capacity is 14.73g/g, and tensile strength is 37KPa, and density is 54.2kg/m
3
Claims (4)
1. a bamboo fibers polyvalent alcohol prepares the method for high suction flexible PU foam, it is characterized in that may further comprise the steps, following consumption is weight part:
1) with one or more and glycerol mixing in the polyoxyethylene glycol of number-average molecular weight 200 ~ 600, add the vitriol oil after being warming up to 150 ℃, stir 10 ~ 20min, add the bamboo fibers that is dried to constant weight again, continue reaction 2h, it is 6.5 ~ 7.5 that reaction finishes back adding sodium hydroxide adjusting pH, namely obtains the bamboo fibers polyvalent alcohol;
2) the bamboo fibers polyvalent alcohol of above-mentioned 5 ~ 45 weight parts, the polyether glycol of 55 ~ 95 weight parts, the water of 1 ~ 1.5 weight part, the stannous octoate of 0.2 ~ 0.4 weight part, the triethylene diamine of 0.12 ~ 0.16 weight part, the suds-stabilizing agent of 1 ~ 4 weight part, the pneumatogen of 2.5 ~ 5 weight parts, the pore-creating agent of 5 ~ 7 weight parts, the trolamine of 2.5 ~ 7.5 weight parts are mixed, again with the tolylene diisocyanate mixed foaming of 26 ~ 66 weight parts.
2. a kind of bamboo fibers polyvalent alcohol according to claim 1 prepares the method for high suction flexible PU foam, it is characterized in that bamboo fibers is mao bamboon fiber or cizu fiber.
3. a kind of bamboo fibers polyvalent alcohol according to claim 1 prepares the method for high suction flexible PU foam, it is characterized in that described tolylene diisocyanate is a kind of or its mixture in 2,4 toluene diisocyanate and 2, the 6-tolylene diisocyanate.
4. a kind of bamboo fibers polyvalent alcohol according to claim 1 prepares the method for high suction flexible PU foam, it is characterized in that polyether glycol is polyethers GEP-330N or polyethers GEP-560S.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105504211A (en) * | 2016-01-07 | 2016-04-20 | 甘肃银光聚银化工有限公司 | Method for preparing polyurethane hydrophilic flexible foam |
| CN107602789A (en) * | 2017-09-29 | 2018-01-19 | 鹤山市杰之星五金实业有限公司 | A kind of plant polyatomic alcohol and its soft polyurethane foam containing plant polyatomic alcohol |
| CN108641391A (en) * | 2018-05-07 | 2018-10-12 | 东莞市创继荣高分子材料有限公司 | A kind of non-latex powder puff of bamboo fibre hydrophily and preparation method |
| CN108745318A (en) * | 2018-06-20 | 2018-11-06 | 叶建民 | A kind of preparation method of Eichhornia crassipes based aquagel adsorbent |
| CN109836807A (en) * | 2019-01-24 | 2019-06-04 | 天津市大邱庄泡沫塑料有限公司 | A kind of flexible polyurethane foam and its processing method |
| CN110294835A (en) * | 2019-07-05 | 2019-10-01 | 淮安同创泡绵有限公司 | A kind of hydrophilic polyurethane sponge for sewage treatment |
| CN110467718A (en) * | 2019-07-10 | 2019-11-19 | 厦门大学 | A kind of biomass-based buffering package foamed material and preparation method thereof |
| CN111454465A (en) * | 2020-04-15 | 2020-07-28 | 黎明化工研究设计院有限责任公司 | Modified lignin, full-water-based low-density flame-retardant flexible polyurethane foam composition and preparation method thereof |
| CN111592752A (en) * | 2020-06-10 | 2020-08-28 | 东莞市腾崴塑胶制品有限公司 | Bamboo fiber sponge and preparation method thereof |
-
2013
- 2013-07-07 CN CN 201310283205 patent/CN103289056A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105504211A (en) * | 2016-01-07 | 2016-04-20 | 甘肃银光聚银化工有限公司 | Method for preparing polyurethane hydrophilic flexible foam |
| CN105504211B (en) * | 2016-01-07 | 2018-09-28 | 甘肃银光聚银化工有限公司 | A method of preparing the soft bubble of polyurethane hydrophilic |
| CN107602789A (en) * | 2017-09-29 | 2018-01-19 | 鹤山市杰之星五金实业有限公司 | A kind of plant polyatomic alcohol and its soft polyurethane foam containing plant polyatomic alcohol |
| CN108641391A (en) * | 2018-05-07 | 2018-10-12 | 东莞市创继荣高分子材料有限公司 | A kind of non-latex powder puff of bamboo fibre hydrophily and preparation method |
| CN108745318A (en) * | 2018-06-20 | 2018-11-06 | 叶建民 | A kind of preparation method of Eichhornia crassipes based aquagel adsorbent |
| CN109836807A (en) * | 2019-01-24 | 2019-06-04 | 天津市大邱庄泡沫塑料有限公司 | A kind of flexible polyurethane foam and its processing method |
| CN110294835A (en) * | 2019-07-05 | 2019-10-01 | 淮安同创泡绵有限公司 | A kind of hydrophilic polyurethane sponge for sewage treatment |
| CN110467718A (en) * | 2019-07-10 | 2019-11-19 | 厦门大学 | A kind of biomass-based buffering package foamed material and preparation method thereof |
| CN111454465A (en) * | 2020-04-15 | 2020-07-28 | 黎明化工研究设计院有限责任公司 | Modified lignin, full-water-based low-density flame-retardant flexible polyurethane foam composition and preparation method thereof |
| CN111592752A (en) * | 2020-06-10 | 2020-08-28 | 东莞市腾崴塑胶制品有限公司 | Bamboo fiber sponge and preparation method thereof |
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Application publication date: 20130911 |