CN101914854A - Temperature sensitive type waterproof moisture-penetrating urethane resin and preparation method thereof - Google Patents
Temperature sensitive type waterproof moisture-penetrating urethane resin and preparation method thereof Download PDFInfo
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- CN101914854A CN101914854A CN2009101821832A CN200910182183A CN101914854A CN 101914854 A CN101914854 A CN 101914854A CN 2009101821832 A CN2009101821832 A CN 2009101821832A CN 200910182183 A CN200910182183 A CN 200910182183A CN 101914854 A CN101914854 A CN 101914854A
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Abstract
The invention discloses a temperature sensitive type waterproof moisture-penetrating urethane resin and a preparation method thereof. Compared with a general waterproof moisture-penetrating urethane resin used in the market, the temperature sensitive type waterproof moisture-penetrating urethane resin increases a temperature sensitive function; the molecular arrangement mode of the urethane resin is controlled through special formula and process so that the urethane resin has higher response capacity on environmental temperature; when the environmental temperature is higher, the moisture-penetrating amount of the urethane resin is increased, heat rejection and perspiration elimination are accelerated so that people feel cool; when the environmental temperature is lower, moisture-penetrating property is lowered so as to play roles of wind stop, heat preservation and warm keeping, and moisture-penetrability and temperature regulation play a coordination role simultaneously, therefore a wearer can feel comfortable under the conditions of changeable environmental temperature or calorification and perspiration elimination of human bodies, and the like.
Description
Technical field
The present invention relates to a kind of polyurethane resin and preparation method thereof, the special-purpose temperature sensitive type waterproof moisture-penetrating urethane resin of especially a kind of waterproof moisture permeating fabric processing.
Background technology
The fabric in past does not have the Waterproof Breathable function, in clammy weather, some dress ornament such as down jackets, insulated cold wear etc., no water-proof function, sleet from outside corrode always interior; The waterproof that has is airtight, and the steam row that health distributes does not go out, and is outside interior wetting, very uncomfortable.Wear the raising of requirement along with people.Requirement to snugness of fit is more and more higher, and film Compound Machining moisture-permeability waterproof fabric is developed.And, not merely emphasize water-proof function as so-called " respirable fabric (BreathableFabric) " towards frivolous, weather-proof clothing exploitation and development, more clearly highlight wet function.Using in the garment material in recent years has the film composite fabric of respiratory function obviously to increase, and more and more for functional requirement.
So-called " Waterproof Breathable " cloth is the cloth that the rainproof penetration by water of a kind of energy can be discharged the sweat steam again, can't dewfall take place in the overcoat and causes clammy uncomfortable phenomenon." poisture-penetrability " means that steam that when strenuous exercise health discharges can reach cool effect and keep excellent comfortable and dry and comfortable by body surface evaporates into the outside; " water proofing property " is meant that cloth has the ability of keeping out moisture penetration fully.This class water-proof cloth normally on the cloth surface with PU, Teflon film (PTFE), TPU, TPE ... process Deng the material coating or with the film applying.
The mode of waterproof moisture permeating fabric performance has three kinds: 1. directly coating (Directcoating); 2. fit (Lamination); 3. high density institutional framework (High-density weave structure).No matter be direct coating resin or film adhered, its material characteristic can be divided into two kinds of little porous type and hydrophilics (anapsid), ten hundreds of micropores is contained on the resin that little porous type is every square centimeter or the surface of processing film, these micropores are little more than water droplet, even therefore also can stop the infiltration of moisture under pressure fully, can allow the interior aqueous vapor of clothes discharge again, keep dry and comfortable.Hydrophilic then is to utilize hydrophilic group that sweat absorption is discharged sweat by diffusion, convection type again.According to the actual environment demand, different water pressure resistances and moisture permeability combination cloth is arranged.
Waterproof and saturating wet these two functions generally it seems it is contradiction, should waterproof wet thoroughly again, as long as make the micro-pore diameter of coated fabric be controlled to be 0.2～5 μ scope from the physics judgement of macroscopic view.Because the diameter of stream molecule is 0.0004 μ; And the diameter of various misty rains is: mist 20 μ, mist 200 μ, drizzle 400 μ, light rain 900 μ, heavy rain 3000～4000 μ, heavy rain 6000～10000 μ.Utilize the type of little porous resin and film, countless epithelium holes are about 0.2～10 μ, and are littler than the diameter (100～6000 μ) of raindrop, bigger than the diameter (0.0004 μ) of aqueous vapor.Rain of the outside or water droplet can't infilter moisture-permeability waterproof processing cloth internal layer, but the aqueous vapor that human body gives out can promptly be discharged outside the clothes maintenance health comfortable (Comfort).Human body is in the body heat of promptly can not feeling the at ordinary times drainage of evapotranspiring, and sweating comes out considerable moisture content during motion, has obvious sensation.At first can be absorbed in underwear and the clothes during perspiration, again via poisture-penetrability waterproof processing cloth, the aqueous vapor clothes outside of evapotranspiring.In important functions such as clothes internal condensation or icing phenomenons, the sensation of health can remain on comfortable state when poisture-penetrability had the rising of the clothes of preventing internal temperature and prevents cold.
Recently, people improve constantly snugness of fit, functional requirement, impel us to adopt various new techniques to improve every performance of fabric, the exploitation of different process, technology is the main means of giving the new function of fabric, since the Waterproof Breathable product is arranged, the fabric that the Waterproof Breathable function is arranged at first is Ventile, and it is the close weave of 100% cotton textiles.Convert the TEFLON research and development to TPFE film (polytetrafluoroethylene (PTFE)) up to the seventies by R.W.Gore, lamination or (compound) fabric of being named Goretex came out in 1971, were progress important in the waterproof moisture permeating fabric development process.Science and technology development promotes textile industry constantly forward, and the clothes of 21 century will develop towards comfortable and easy to wearization, functionalization direction.Various intelligent, function fabrics are subjected to paying close attention to widely.The temperature sensitive type waterproof moisture-penetrating fabric is exactly one of them.
With the weaving face fabric that existing waterproof moisture-penetrating urethane resin processes, though have the function of Waterproof Breathable, the energy flashing, wind proofing again can perspire, ventilative, comfortable and easy to wear.But externally under the abominable situation of environment, moisture permeability deficiency when warmth retention property difference and high temperature during as low temperature.Cause in the life of summer high temperature state, because the vapor transfer rate deficiency still has sultry sensation; And live on the mountain winter for a long time, because saturating wetting makes the clothes heat insulating ability not good, has the possibility of freezing to death.
Summary of the invention
In order to address the above problem, the invention provides a kind of temperature sensitive type waterproof moisture-penetrating urethane resin and preparation method thereof, the temperature sensitive type waterproof moisture-penetrating urethane resin that makes by special formulation of the present invention and technology has temperature sensing function, when environment temperature is higher, its moisture vapor transmission increases, the heat extraction perspire is accelerated, make the people feel nice and cool, when environment temperature is low, water vapour permeability reduces, and plays the insulation thermal effect that keeps out the wind, and poisture-penetrability and adjustment are brought into play coordinative role simultaneously, the wearer, can feel comfortably cool under the situation such as changeable or human body heating perspiration in environment temperature.
The present invention for the technical scheme that solves its technical problem and adopt is: a kind of temperature sensitive type waterproof moisture-penetrating urethane resin, by active ingredient and solvent composition, described active ingredient is polyurethane (PU, Polyurethane), described solvent be toluene (TOL, Toluene), dimethyl formamide (DMF, Dimethylformamide) and butanone (MEK, Methyl ethyl ketone), in the temperature sensitive type waterproof moisture-penetrating urethane resin total weight percent, each constituent content is as follows:
Polyurethane: 29%～31%;
Toluene: 22%～24%;
Dimethyl formamide: 21%～23%;
Butanone: 23%～25%.
Be used to generate described polyurethane (each constituent content is as follows for PU, each reactant that Polyurethane) is adopted and the total weight percent meter of each auxiliary agent:
Polyester polyol: 18.5%～19.5%;
Polyether polyol: 34.0%～35.0%;
Butanediol: 7.0%～8.0%;
4,4-diphenylmethane diisocyanate (MDI): 26.5%～29.0%;
Antioxidant: 0.1%～0.3%;
Ultraviolet-resistant absorbent: 0.1%～0.3%;
Catalyst: 0.05%～0.10%;
Organosiloxane: 0.8%～1.2%;
Delustering agent: 9.5%～10.0%;
Wherein said polyester polyol, polyether polyol, butanediol and 4,4-diphenylmethane diisocyanate (MDI) reacts the described reactant that generates polyurethane for being used to, and described antioxidant, ultraviolet-resistant absorbent, catalyst, organosiloxane and delustering agent are described auxiliary agent.
Described polyester polyol is the tetramethylene adipate triol, make in the polyurethane molecular soft section chain relatively evenly, rerum natura is stronger, the temperature sensitive type waterproof moisture-penetrating film softness of producing, rerum natura is good and the film sense is stronger.
Described polyether polyol is polyethylene glycol-2000 (PEG-2000), provide polyurethane to have hydrophilic radical by the hydrophilic group of polyethylene glycol and reach wet purpose, and design adjusts the degree of polymerization and the content of polyethylene glycol, reaches high saturating wet purpose.
Described butanediol is 1, and 4-butanediol (BDO) is chain extender.
Described catalyst is not for containing the metal solvent of organic tin, the reaching of catalytic reaction.
Described antioxidant is that phenol is antioxidant, main application be prevent resin in the high-temperature reaction process thermal oxide and polyurethane processing rear oxidation decompose.
Described ultraviolet-resistant absorbent is benzotriazole derivatives (Benzotriazol-es), has high ultraviolet absorption ability, good ageing resistance and processing stability, can prevent and slow down in the process because light and thermal cracking that thermal oxide caused.
Described delustering agent is an amorphous silica, and through special organic process, porosity height, dispersion easily have very high flatting efficiency, because its tiny particle diameter and special organic process make polyurethane coating film have outstanding surface smoothing performance.
Use the reaction shape levelling agent of hydroxyl organosiloxane, can promote levelability, ABRASION RESISTANCE and help and peel off, have ventilative, saturating wet and water proofing property concurrently as the polyurethane upgrading.
A kind of preparation method of temperature sensitive type waterproof moisture-penetrating urethane resin, raw material has solvent, reactant and auxiliary agent, described solvent is toluene, dimethyl formamide and butanone, described reactant is polyester polyol, polyether polyol, butanediol and 4, the 4-diphenylmethane diisocyanate, described auxiliary agent is antioxidant, ultraviolet-resistant absorbent, catalyst, organosiloxane and delustering agent, and preparation process is undertaken by following processing step:
With toluene, dimethyl formamide and butanone drop in the reactor, obtain mixed solvent, and mixed solvent is heated to 35～45 ℃, with polyester polyol, polyether polyol, antioxidant and catalyst add in the reactor, after treating that above-mentioned adding material dissolves fully, add 4, the 4-diphenylmethane diisocyanate, reactor temperature is controlled at 70～80 ℃ carries out polymerisation, add several times 4 in the course of reaction in good time, the 4-diphenylmethane diisocyanate is glutinous to increase, and detect viscosity at any time, treat that viscosity rises to design viscosity (700～800PS/75～80 ℃) time and adds by toluene, the mixed solvent that dimethyl formamide and butanone are formed, and then add butanediol and keep 70～80 ℃ of sustained responses of temperature, add several times 4 in the course of reaction in good time, the 4-diphenylmethane diisocyanate is glutinous to increase, and detect viscosity at any time, along with the rising of viscosity adds by toluene, the mixed solvent that dimethyl formamide and butanone are formed is with dilution, treat to add when viscosity is elevated to a certain degree organosiloxane, ultraviolet-resistant absorbent and delustering agent sustained response are complete, the control specification is 600～1000PS/25 ℃, make described temperature sensitive type waterproof moisture-penetrating urethane resin, its solid content is 29%～31%.
The invention has the beneficial effects as follows: temperature sensitive type waterproof moisture-penetrating urethane resin of the present invention is used on the coated fabric, with one of use on the market as waterproof moisture-penetrating urethane resin relatively, increase the temperature temperature sensing function, make it have stronger respond by special material and special technology controlling and process polyurethane resin molecules align mode for environment temperature, when its environment temperature is low (＜Tg) vapor transfer rate is lower than 1000g/m
224hr plays the low temperature heat-preserving function, than under the high ambient temperature (＞Tg) its moisture permeability is brought up to 3000g/m
2Reach the function of perspire more than the 24hr.Poisture-penetrability is subjected to adjustment like this, makes the wearer all can feel comfortably cool under the changeable situation of environment temperature, is different from GENERAL TYPE waterproof moisture-penetrating urethane resin in the market.Weaving face fabric with temperature sensitive type waterproof moisture-penetrating urethane resin processing of the present invention is mainly used in fields such as clothes, industry cloth, can be used as ready-made clothes science and technology, motion science and technology, medical science and technology, protection science and technology, and tradesman's such as public security fire-fighting, field army, People's Armed Police clothes, can under various environmental conditions, improve wearing comfortableness.
The specific embodiment
The prescription of the embodiment of the invention is referring to table 1:
Table 1:(unit: each ingredients constitute raw material total weight percent, %)
Described polyester polyol is the tetramethylene adipate triol, make in the polyurethane molecular soft section chain relatively evenly, rerum natura is stronger, the temperature sensitive type waterproof moisture-penetrating film softness of producing, rerum natura is good and the film sense is stronger.
Described polyether polyol is polyethylene glycol-2000 (PEG-2000), provide polyurethane to have hydrophilic radical by the hydrophilic group of polyethylene glycol and reach wet purpose, and design adjusts the degree of polymerization and the content of polyethylene glycol, reaches high saturating wet purpose.
Described butanediol is 1, and 4-butanediol (BDO) is chain extender.
Described catalyst is not for containing the metal solvent of organic tin, the reaching of catalytic reaction.
Described antioxidant is that phenol is antioxidant, main application be prevent resin in the high-temperature reaction process thermal oxide and polyurethane processing rear oxidation decompose.
Described ultraviolet-resistant absorbent is benzotriazole derivatives (Benzotriazol-es), has high ultraviolet absorption ability, good ageing resistance and processing stability, can prevent and slow down in the process because light and thermal cracking that thermal oxide caused.
Described delustering agent is an amorphous silica, and through special organic process, porosity height, dispersion easily have very high flatting efficiency, because its tiny particle diameter and special organic process make polyurethane coating film have outstanding surface smoothing performance.
Use the reaction shape levelling agent of hydroxyl organosiloxane, can promote levelability, ABRASION RESISTANCE and help and peel off, have ventilative, saturating wet and water proofing property concurrently as the polyurethane upgrading.
Toluene, dimethyl formamide and butanone are solvents in the above-mentioned raw materials, polyester polyol, polyether polyol, butanediol and 4, the 4-diphenylmethane diisocyanate is that reactant is, antioxidant, ultraviolet-resistant absorbent, catalyst, organosiloxane and delustering agent are auxiliary agents.
Preparation process is undertaken by following processing step: with toluene, dimethyl formamide and butanone drop in the reactor, obtain mixed solvent, and mixed solvent is heated to 35～45 ℃, with polyester polyol, polyether polyol, antioxidant and catalyst add in the reactor, after treating that above-mentioned adding material dissolves fully, add 4, the 4-diphenylmethane diisocyanate, reactor temperature is controlled at 70～80 ℃ carries out polymerisation, add several times 4 in the course of reaction in good time, the 4-diphenylmethane diisocyanate is glutinous to increase, and detect viscosity at any time, treat that viscosity rises to design viscosity (700～800PS/75～80 ℃) time and adds by toluene, the mixed solvent that dimethyl formamide and butanone are formed, and then add butanediol and keep 70～80 ℃ of sustained responses of temperature, add several times 4 in the course of reaction in good time, the 4-diphenylmethane diisocyanate is glutinous to increase, and detect viscosity at any time, along with the rising of viscosity adds by toluene, the mixed solvent that dimethyl formamide and butanone are formed is with dilution, treat to add when viscosity is elevated to a certain degree organosiloxane, ultraviolet-resistant absorbent and delustering agent sustained response are complete, the control specification is 600～1000PS/25 ℃, make described temperature sensitive type waterproof moisture-penetrating urethane resin, its solid content is 29%～31%.
Development of the present invention is based on following know-why:
Temperature sensitive type waterproof moisture-penetrating urethane resin is a kind of block copolymerization chain macromolecule compound, and this chain macromolecule compound is to be formed by soft segment and rigid chain segment block.Soft segment is that basic polyester polyether polyol is formed by carbon carbon bond, gives performances such as polyurethane resin flexibility, flexibility; Rigid chain segment is to be generated by isocyanates and micromolecule dihydroxylic alcohols (chain extender) reaction, and it gives performances such as polyurethane high-wearing feature, high mechanical properties.Ratio between kind by adjusting polyester polyether polyol, low-molecular-weight diol and they and the isocyanates finally changes the structure of polyurethane, thereby changes the performance of polyurethane.So temperature sensitive type waterproof moisture-penetrating is actually by the molecular structure of regulating polyurethane resin with the adjusting of polyurethane resin performance and realizes.
Improve in order to make temperature sensitive type waterproof moisture-penetrating urethane resin be applied to fabric processing back waterproofing and moisture-penetration performances, at first polyurethane resin is carried out MOLECULE DESIGN.The present invention utilizes and contains hydrophilic radical in the molecular structure of polyurethane resin or hydrophilic component is arranged on its main chain, after the coating oven dry, forms nonporous film.Temperature sensitive type waterproof moisture-penetrating uses the hydrophilic radical of urethane resin film as the water vapour molecule medium of movement, hydrone is because hydrogen bond and other molecular separating force, at high humility one side draught attached water molecule, be delivered to low humidity one side desorb by hydrophilic radical on the macromolecular chain, form " absorption-diffusion-desorb " process, reach wet purpose.Hydrophilic component is the hydrophilic radical in the polyurethane molecular chain.Its water proofing property comes from the continuity and the bigger surface tension of fabric of film self.Utilize temperature sensitive type waterproof moisture-penetrating to carry out the compound loomage water proof and moisture permeable function of giving with polyurethane resin and fabric.
See through new synthetic technology and understanding in depth to polyurethane resin, we find under higher environment temperature, polyurethane molecular becomes soft section of crystalline state to meet by the rubbery state of the glassy transition that freezes for enlivening, if the vitrification point (Tg) of polyurethane resin is adjusted near the environment temperature (20 ℃) of a little higher than human body the most comfortable, can utilize it to be used as fabric functional processing, produce the temperature sensitive type waterproof moisture-penetrating fabric that environment temperature is had regulating action.Utilize its moisture vapor permeability controlled by temperature, when environment temperature is low (＜Tg), this a kind of fabric has wet thoroughly or low saturating wet windproof heat insulation function, and under higher environment temperature (＞Tg) time, it can play high thermolysis of wetting.Substantially improve the wear comfortableness of fabric.
The present invention utilizes a kind of new synthetic processing formula and technology, selects the degree of polymerization and the content of design hydrophilic group, and the glass transition temperature (Tg) of control polyurethane is set in room temperature (temperature range that human body sensory is comfortable) with Tg.So, when environment was higher than Tg, polymer underwent phase transition heat absorption, and polymer volume expands simultaneously, and the hydrophilic radical spatial volume increases, and the warm-up movement aggravation increases moisture vapor transmission, and the heat extraction perspire is accelerated, and makes the people feel nice and cool.When environment temperature is lower than Tg, the crystallization of hydrophilic radical segment, polymer phase-change is emitted heat, and Brownian movement simultaneously reduces, and water vapour permeability reduces, and plays the insulation thermal effect that keeps out the wind.Moisture vapor permeability and adjustment are brought into play coordinative role simultaneously, and the wearer, can feel comfortably cool under the situation such as changeable or human body heating perspiration in environment temperature.
Temperature sensitive type waterproof moisture-penetrating urethane resin of the present invention, available dry process is applied to weaving face fabric production, be applied to earlier on the release liners and after the oven for drying film forming, can get a homogeneous film, change again to paste and be compound on the fabric, can give that fabric is windproof, the functional characteristic of waterproof, because of its sensitivity characteristic for temperature, cloth makes that can to reach low temperature behind the clothing warming, high temperature perspire airing function can promote the attractive in appearance of clothing and value.
This temperature sensitive type waterproof moisture-penetrating urethane resin is applied on the fabric, and the suggestion processing mode is as follows:
1, process engineering:
Cloth is dyed → and (Cire) is standby in water-sprinkling (W/R) → press polish;
2, processing formula:
Temperature sensitive type waterproof moisture-penetrating urethane resin: colorant: DMF/MEK is 100: 6～10: 30～40 (weight ratios);
3, application viscosity 3000～6000cps/ normal temperature, cutter is coated with gluing on release liners, after the drying film forming, goes up the solid transfer again and is compound on the base cloth, can obtain having the composite fabric of functional requirement after the placement maturation.This fabric is made clothing and can be promoted clothing and must be worth.
Weaving face fabric with this temperature sensitive type waterproof moisture-penetrating urethane resin processing is mainly used in clothes; fields such as industry cloth; can be used as ready-made clothes science and technology (winter insulated cold wear; raincoat; wind coat; ski suit; cap strip; the gloves material; various ready-made clothes material); motion science and technology (mountain-climbing dress and equipment thereof; the navigation dress; outdoor exercises are with cap strip and gloves material; fishing trousers; the aerobic exercise clothes; the training clothes); medical science and technology (deserted vest; the medical mattress sheath); protection science and technology (horsecloth; the racing car clothes; Garment for motorcycle driver; the field work clothes; working wear); and public security fire-fighting; field army; tradesmans' such as People's Armed Police clothes can improve wearing comfortableness under various environmental conditions.
Claims (5)
1. temperature sensitive type waterproof moisture-penetrating urethane resin, it is characterized in that: by active ingredient and solvent composition, described active ingredient is polyurethane, and described solvent is toluene, dimethyl formamide and butanone, in the temperature sensitive type waterproof moisture-penetrating urethane resin total weight percent, each constituent content is as follows:
Polyurethane: 29%～31%;
Toluene: 22%～24%;
Dimethyl formamide: 21%～23%;
Butanone: 23%～25%.
2. temperature sensitive type waterproof moisture-penetrating urethane resin as claimed in claim 1 is characterized in that: to be used to generate each reactant that described polyurethane adopted and the total weight percent of each auxiliary agent, each constituent content is as follows:
Polyester polyol: 18.5%～19.5%;
Polyether polyol: 34.0%～35.0%;
Butanediol: 7.0%～8.0%;
4,4-diphenylmethane diisocyanate: 26.5%～29.0%;
Antioxidant: 0.1%～0.3%;
Ultraviolet-resistant absorbent: 0.1%～0.3%;
Catalyst: 0.05%～0.10%;
Organosiloxane: 0.8%～1.2%;
Delustering agent: 9.5%～10.0%;
Wherein said polyester polyol, polyether polyol, butanediol and 4,4-diphenylmethane diisocyanate are to be used to react the described reactant that generates polyurethane, and described antioxidant, ultraviolet-resistant absorbent, catalyst, organosiloxane and delustering agent are described auxiliary agent.
3. temperature sensitive type waterproof moisture-penetrating urethane resin as claimed in claim 2 is characterized in that: described polyester polyol is the tetramethylene adipate triol; Described polyether polyol is a polyethylene glycol-2000; Described butanediol is 1, the 4-butanediol.
4. temperature sensitive type waterproof moisture-penetrating urethane resin as claimed in claim 2 is characterized in that: described catalyst is not for containing the metal solvent of organic tin; Described antioxidant is that phenol is antioxidant; Described ultraviolet-resistant absorbent is a benzotriazole derivatives; Described delustering agent is an amorphous silica.
5. the preparation method of a temperature sensitive type waterproof moisture-penetrating urethane resin, it is characterized in that: raw material has solvent, reactant and auxiliary agent, described solvent is toluene, dimethyl formamide and butanone, described reactant is polyester polyol, polyether polyol, butanediol and 4, the 4-diphenylmethane diisocyanate, described auxiliary agent is antioxidant, ultraviolet-resistant absorbent, catalyst, organosiloxane and delustering agent, and preparation process is undertaken by following processing step:
With toluene, dimethyl formamide and butanone drop in the reactor, obtain mixed solvent, and mixed solvent is heated to 35～45 ℃, with polyester polyol, polyether polyol, antioxidant and catalyst add in the reactor, after treating that above-mentioned adding material dissolves fully, add 4, the 4-diphenylmethane diisocyanate, reactor temperature is controlled at 70～80 ℃ carries out polymerisation, add several times 4 in the course of reaction in good time, the 4-diphenylmethane diisocyanate is glutinous to increase, and detect viscosity at any time, treat that viscosity adds by toluene when rising to the design viscosity, the mixed solvent that dimethyl formamide and butanone are formed, and then add butanediol and keep 70～80 ℃ of sustained responses of temperature, add several times 4 in the course of reaction in good time, the 4-diphenylmethane diisocyanate is glutinous to increase, and detect viscosity at any time, along with the rising of viscosity adds by toluene, the mixed solvent that dimethyl formamide and butanone are formed is with dilution, treat to add when viscosity is elevated to a certain degree organosiloxane, ultraviolet-resistant absorbent and delustering agent sustained response are complete, the control specification is 600～1000PS/25 ℃, makes described temperature sensitive type waterproof moisture-penetrating urethane resin.
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1070202C (en) * | 1996-07-15 | 2001-08-29 | 南亚塑胶工业股份有限公司 | Moisture penetrative and waterproof polyurethane resin and production thereof |
| CN101100500B (en) * | 2006-07-07 | 2011-06-08 | 西安工程大学 | Polyurethane shape memory macromolecule material and synthetic technique thereof |
| CN101081895B (en) * | 2007-07-12 | 2010-08-04 | 江苏东邦化学有限公司 | Water-washing resistant moisture-permeable water-proof polyurethane resin and method for manufacturing same |
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