CN101914854B - 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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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 urethane 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.The raising that the Along with people's dress requires.To snugness of fit require increasingly highly, film Compound Machining moisture-permeability waterproof fabric is developed.And, not merely stress water-proof function like so-called " respirable fabric (BreathableFabric) " towards frivolous, weatherable clothing exploitation and development, more clearly highlight wet function.Using in the garment material in recent years has the film compound 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 ability can be discharged the sweat steam again, can't dewfall take place in the overcoat and causes clammy uncomfortable phenomenon." water vapour permeability " 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-repellancy " is meant that cloth has the ability of keeping out moisture penetration fully.This type 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 weave construction (High-density weave structure).No matter be direct coating resin or film adhered; Its material characteristic can be divided into two kinds of little multi-hole type and hydrophilics (anapsid); Ten hundreds of micropores is contained on the resin that little multi-hole type is every square centimeter or the surface of processing film, and these micropores are little more than water droplet, even therefore also can stop the infiltration of moisture under pressure fully; Can let 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 Water Vapour Permeability combination cloth is arranged.
Waterproof and thoroughly 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 judgement of macroscopic physics.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.The rain or the water droplet of the outside can't infilter moisture-permeability waterproof machining cloth internal layer, but the aqueous vapor that human body gives out can promptly be discharged outside the clothes maintenance physical comfort (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 water vapour permeability waterproof processing cloth, outside the aqueous vapor clothes that evapotranspires.In important functions such as clothes internal condensation or icing phenomenons, the sensation of health can remain on comfortable state when water vapour permeability 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 each item 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 (tetrafluoroethylene) 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 performance history.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 receive widely and paying close attention to.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 ability flashing, wind proofing again can perspire, ventilative, comfortable and easy to wear.But externally under the abominable situation of environment, during like low temperature when heat retention difference and high temperature Water Vapour Permeability not enough.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, makes the clothes heat retaining property not good because pass through to wet, and 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 through special formulation of the present invention and technology has temperature sensing function; When envrionment temperature was higher, its moisture vapor transmission increased, and the heat extraction perspire is accelerated; Make the people feel nice and cool, when envrionment temperature was low, water vapour permeability reduced; Play the insulation thermal effect that keeps out the wind; Water vapour permeability and temperature regulation 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 envrionment 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 effective constituent and solvent composition, said effective constituent is urethane (PU; Polyurethane), said solvent be toluene (TOL, Toluene), N (DMF; Dimethylformamide) and butanone (MEK; Methyl ethyl ketone), in the temperature sensitive type waterproof moisture-penetrating urethane resin total weight percent, each component concentration is following:
Urethane: 29%～31%;
Toluene: 22%～24%;
N: 21%～23%;
Butanone: 23%～25%.
Be used to generate said urethane (each component concentration is following 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 glycol: 34.0%～35.0%;
Butyleneglycol: 7.0%～8.0%;
4,4-diphenylmethane diisocyanate (MDI): 26.5%～29.0%;
Inhibitor: 0.1%～0.3%;
Ultraviolet-resistant absorbent: 0.1%～0.3%;
Catalyst: 0.05%～0.10%;
Organo-siloxane: 0.8%～1.2%;
Matting agent: 9.5%～10.0%;
Wherein said polyester polyol, polyether glycol, butyleneglycol and 4; 4-diphenylmethane diisocyanate (MDI) reacts the said reactant that generates urethane for being used to, and said inhibitor, ultraviolet-resistant absorbent, catalyst, organo-siloxane and matting agent are said auxiliary agent.
Said 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 of producing is soft, rerum natura is good and the film sense is stronger.
Said polyether glycol is polyoxyethylene glycol-2000 (PEG-2000), provides urethane to have hydrophilic radical by the hydrophilic group of polyoxyethylene glycol and reaches wet purpose, and the polymerization degree and the content of design adjustment polyoxyethylene glycol, reach the high wet purpose of passing through.
Said butyleneglycol is 1, and 4-butyleneglycol (BDO) is chainextender.
Said catalyst is not for containing the metal solvent of organic tin, the reaching of catalyzed reaction.
Said inhibitor is that phenol is inhibitor, main application be prevent resin in the high-temperature reaction process thermooxidizing and urethane processing rear oxidation decompose.
Said ultraviolet-resistant absorbent is OR 10154 (Benzotriazol-es), has high ultraviolet absorption ability, good resistance to deterioration and processing stability, can prevent and slow down in the course of processing because light and thermo-cracking that thermooxidizing caused.
Said matting agent is an amorphous silica, and through special organic process, high, the dispersion easily of porosity has 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 flow agent of hydroxyl organo-siloxane, can promote leveling characteristics, wear resistance and help and peel off as the urethane upgrading, have concurrently ventilative, pass through wet and water-repellancy.
A kind of preparation method of temperature sensitive type waterproof moisture-penetrating urethane resin; Raw material has solvent, reactant and auxiliary agent; Said solvent is toluene, N and butanone, and said reactant is polyester polyol, polyether glycol, butyleneglycol and 4, the 4-diphenylmethane diisocyanate; Said auxiliary agent is inhibitor, ultraviolet-resistant absorbent, catalyst, organo-siloxane and matting agent, and the preparation process is undertaken by following process step:
Toluene, N and butanone are dropped in the reaction kettle, obtain mixed solvent, and mixed solvent is heated to 35～45 ℃; Polyester polyol, polyether glycol, inhibitor and catalyst are added in the reaction kettle, treat that above-mentioned adding material dissolves fully after, add 4; The 4-diphenylmethane diisocyanate is controlled at 70～80 ℃ with reactor temperature and carries out polyreaction, adds several times 4 in the reaction process in good time; The 4-diphenylmethane diisocyanate is glutinous to increase; And detect viscosity at any time, treat to add the mixed solvent of forming by toluene, N and butanone when viscosity rises to design viscosity (700～800PS/75～80 ℃), and then add butyleneglycol and keep 70～80 ℃ of sustained reactions of temperature; Add several times 4 in the reaction process in good time; The 4-diphenylmethane diisocyanate is glutinous to increase, and detects viscosity at any time, adds the mixed solvent is made up of toluene, N and butanone along with the rising of viscosity to dilute; It is complete to treat to add when viscosity is elevated to a certain degree organo-siloxane, ultraviolet-resistant absorbent and matting agent sustained reaction; The control specification is 600～1000PS/25 ℃, makes said temperature sensitive type waterproof moisture-penetrating urethane resin, and 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 response capacity by special material and special technology controlling and process urethane resin molecular arrangement mode for envrionment temperature, when its envrionment 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 Water Vapour Permeability is brought up to 3000g/m
2Reach the function of perspire more than the 24hr.Water vapour permeability receives temperature regulation like this, makes the wearer under the changeable situation of envrionment temperature, all can feel comfortably cool, and 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 envrionment conditionss, improve wearing comfortableness.
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, %)
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 |
| Polyester polyol | 5.629 | 5.718 | 5.51 | 6.006 | 5.987 | 5.871 | 5.55 |
| Polyether glycol | 10.369 | 10.446 | 10.034 | 10.78 | 10.592 | 10.599 | 10.2 |
| Butyleneglycol | 2.268 | 2.44 | 2.204 | 2.356 | 2.21 | 2.135 | 2.31 |
| 4, the 4-diphenylmethane diisocyanate | 8.306 | 8.54 | 7.83 | 8.162 | 8.443 | 8.464 | 8.7 |
| Inhibitor | 0.056 | 0.031 | 0.087 | 0.077 | 0.043 | 0.061 | 0.036 |
| Ultraviolet-resistant absorbent | 0.057 | 0.031 | 0.087 | 0.086 | 0.061 | 0.046 | 0.036 |
| Catalyst | 0.015 | 0.015 | 0.029 | 0.022 | 0.018 | 0.027 | 0.024 |
| Organo-siloxane | 0.3 | 0.244 | 0.319 | 0.308 | 0.368 | 0.308 | 0.294 |
| Matting agent | 3 | 3.035 | 2.9 | 3.003 | 2.978 | 2.989 | 2.85 |
| Toluene | 23.9 | 23.5 | 24 | 23.2 | 22 | 23 | 23.3 |
| N | 21.8 | 23 | 22.8 | 21 | 22.5 | 22 | 22.7 |
| Butanone | 24.3 | 23 | 24.2 | 25 | 24.8 | 24.5 | 24 |
Said 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 of producing is soft, rerum natura is good and the film sense is stronger.
Said polyether glycol is polyoxyethylene glycol-2000 (PEG-2000), provides urethane to have hydrophilic radical by the hydrophilic group of polyoxyethylene glycol and reaches wet purpose, and the polymerization degree and the content of design adjustment polyoxyethylene glycol, reach the high wet purpose of passing through.
Said butyleneglycol is 1, and 4-butyleneglycol (BDO) is chainextender.
Said catalyst is not for containing the metal solvent of organic tin, the reaching of catalyzed reaction.
Said inhibitor is that phenol is inhibitor, main application be prevent resin in the high-temperature reaction process thermooxidizing and urethane processing rear oxidation decompose.
Said ultraviolet-resistant absorbent is OR 10154 (Benzotriazol-es), has high ultraviolet absorption ability, good resistance to deterioration and processing stability, can prevent and slow down in the course of processing because light and thermo-cracking that thermooxidizing caused.
Said matting agent is an amorphous silica, and through special organic process, high, the dispersion easily of porosity has 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 flow agent of hydroxyl organo-siloxane, can promote leveling characteristics, wear resistance and help and peel off as the urethane upgrading, have concurrently ventilative, pass through wet and water-repellancy.
Toluene, N and butanone are solvents in the above-mentioned raw materials; Polyester polyol, polyether glycol, butyleneglycol and 4; The 4-diphenylmethane diisocyanate is that reactant does, inhibitor, ultraviolet-resistant absorbent, catalyst, organo-siloxane and matting agent are auxiliary agents.
The preparation process is undertaken by following process step: toluene, N and butanone are dropped in the reaction kettle, obtain mixed solvent, and mixed solvent is heated to 35～45 ℃; Polyester polyol, polyether glycol, inhibitor and catalyst are added in the reaction kettle, treat that above-mentioned adding material dissolves fully after, add 4; The 4-diphenylmethane diisocyanate is controlled at 70～80 ℃ with reactor temperature and carries out polyreaction, adds several times 4 in the reaction process in good time; The 4-diphenylmethane diisocyanate is glutinous to increase; And detect viscosity at any time, treat to add the mixed solvent of forming by toluene, N and butanone when viscosity rises to design viscosity (700～800PS/75～80 ℃), and then add butyleneglycol and keep 70～80 ℃ of sustained reactions of temperature; Add several times 4 in the reaction process in good time; The 4-diphenylmethane diisocyanate is glutinous to increase, and detects viscosity at any time, adds the mixed solvent is made up of toluene, N and butanone along with the rising of viscosity to dilute; It is complete to treat to add when viscosity is elevated to a certain degree organo-siloxane, ultraviolet-resistant absorbent and matting agent sustained reaction; The control specification is 600～1000PS/25 ℃, makes said temperature sensitive type waterproof moisture-penetrating urethane resin, and 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 glycol is formed by carbon carbon bond, gives performances such as urethane resin flexibility, flexibility; Rigid chain segment is to be generated by isocyanic ester and small molecules divalent alcohol (chainextender) reaction, and it gives performances such as urethane high-wearing feature, high mechanical strength.Ratio between kind through adjustment polyester polyether glycol, low-molecular-weight diol and they and the isocyanic ester finally changes the structure of urethane, thereby changes the performance of urethane.So temperature sensitive type waterproof moisture-penetrating is actually through the molecular structure of regulating urethane resin with the adjusting of urethane 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 urethane resin is carried out molecular designing.The present invention utilizes and contains hydrophilic radical in the molecular structure of urethane resin or hydrophilic component is arranged on its main chain, after the coating oven dry, forms nonporous film.Temperature sensitive type waterproof moisture-penetrating with the hydrophilic radical of urethane resin film as the water vapour molecule medium of movement; Water molecules is because hydrogen bond and other intermolecular forces; At high humidity one side draught attached water molecule; Be delivered to low humidity one side desorb through 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-repellancy 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 urethane resin and fabric.
See through new synthetic technology and understanding in depth to urethane resin; We find under higher envrionment temperature; Polyurethane molecular becomes soft section of crystal form to meet by the rubbery state of the glassy transition that freezes for enlivening; If the second-order transition temperature (Tg) of urethane resin is adjusted near the envrionment temperature (20 ℃) of a little higher than human body the most comfortable, can utilize it to be used as the processing of fabric functional property, produce the temperature sensitive type waterproof moisture-penetrating fabric that envrionment temperature is had regulating effect.Utilize its moisture vapor permeability controlled by temperature, when envrionment temperature is low (＜Tg), this a kind of fabric has not pass through and wet or lowly passes through wet windproof heat insulation function, and under higher envrionment temperature (＞Tg) time, it can play the high thermolysis that wets.Substantially improve the wear comfortableness of fabric.
The present invention utilizes a kind of new synthetic processing formula and technology, selects the polymerization degree and the content of design hydrophilic group, and the second-order transition temperature (Tg) of control urethane is set in room temperature (TR that human body sensory is comfortable) with Tg.So, when environment was higher than Tg, polymkeric substance underwent phase transition heat absorption, and polymer volume expands simultaneously, and the hydrophilic radical spatial volume increases, and the thermal motion aggravation increases moisture vapor transmission, and the heat extraction perspire is accelerated, and makes the people feel nice and cool.When envrionment temperature is lower than Tg, the crystallization of hydrophilic radical segment, polymer phase-change is emitted heat, and pedesis simultaneously reduces, and water vapour permeability reduces, and plays the insulation thermal effect that keeps out the wind.Moisture vapor permeability and temperature regulation 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 envrionment temperature.
Temperature sensitive type waterproof moisture-penetrating urethane resin of the present invention, available dry process is applied to weaving face fabric production, is applied to earlier on the separate-type paper and after the oven for drying film forming, can gets a uniform thin film; Change again to paste and be compound on the fabric; Can give that fabric is windproof, the functional performance 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 following:
1, process engineering:
Cloth is dyed → and (Cire) is subsequent use 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 separate-type paper, after the oven dry film forming, goes up the solid transfer again and is compound on the base cloth, can obtain having the compound 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 fields such as clothes, industry cloth; Can be used as ready-made clothes science and technology (winter insulated cold wear, raincoat, wind coat, ski suit, cap strip, gloves material, various ready-made clothes material), motion science and technology (mountain-climbing dress and equipment thereof, navigation dress, outdoor activity are with cap strip and gloves material, fishing trousers, aerobatic exercise clothes, training clothes), medical science and technology (deserted vest, medical mattress sheath), protection science and technology (horsecloth, racing car clothes, Garment for motorcycle driver, field work clothes, working wear); And tradesman's such as public security fire-fighting, field army, People's Armed Police clothes, can under various envrionment conditionss, improve wearing comfortableness.
Claims (4)
1. temperature sensitive type waterproof moisture-penetrating urethane resin; By effective constituent and solvent composition, said effective constituent is urethane, and said solvent is toluene, N and butanone; In the temperature sensitive type waterproof moisture-penetrating urethane resin total weight percent, each component concentration is following:
Urethane: 29%～31%;
Toluene: 22%～24%;
N: 21%～23%;
Butanone: 23%～25%,
It is characterized in that: to be used to generate each reactant that said urethane adopted and the total weight percent of each auxiliary agent, each component concentration is following:
Polyester polyol: 18.5%～19.5%;
Polyether glycol: 34.0%～35.0%;
Butyleneglycol: 7.0%～8.0%;
4,4-diphenylmethane diisocyanate: 26.5%～29.0%;
Inhibitor: 0.1%～0.3%;
Ultraviolet-resistant absorbent: 0.1%～0.3%;
Catalyst: 0.05%～0.10%;
Organo-siloxane: 0.8%～1.2%;
Matting agent: 9.5%～10.0%;
Wherein said polyester polyol, polyether glycol, butyleneglycol and 4,4-diphenylmethane diisocyanate are to be used to react the said reactant that generates urethane, and said inhibitor, ultraviolet-resistant absorbent, catalyst, organo-siloxane and matting agent are said auxiliary agent.
2. temperature sensitive type waterproof moisture-penetrating urethane resin as claimed in claim 1 is characterized in that: said polyester polyol is the tetramethylene adipate triol; Said polyether glycol is a polyoxyethylene glycol-2000; Said butyleneglycol is 1, the 4-butyleneglycol.
3. temperature sensitive type waterproof moisture-penetrating urethane resin as claimed in claim 1 is characterized in that: said catalyst is not for containing the metal solvent of organic tin; Said inhibitor is that phenol is inhibitor; Said ultraviolet-resistant absorbent is an OR 10154; Said matting agent is an amorphous silica.
4. 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; Said solvent is toluene, N and butanone, and said reactant is polyester polyol, polyether glycol, butyleneglycol and 4, the 4-diphenylmethane diisocyanate; Said auxiliary agent is inhibitor, ultraviolet-resistant absorbent, catalyst, organo-siloxane and matting agent, and the preparation process is undertaken by following process step:
Toluene, N and butanone are dropped in the reaction kettle, obtain mixed solvent, and mixed solvent is heated to 35～45 ℃; Polyester polyol, polyether glycol, inhibitor and catalyst are added in the reaction kettle, treat that above-mentioned adding material dissolves fully after, add 4; The 4-diphenylmethane diisocyanate is controlled at 70～80 ℃ with reactor temperature and carries out polyreaction, adds several times 4 in the reaction process in good time; The 4-diphenylmethane diisocyanate is glutinous to increase, and detects viscosity at any time, treats that viscosity adds the mixed solvent of being made up of toluene, N and butanone when rising to the design viscosity; And then add butyleneglycol and keep 70～80 ℃ of sustained reactions of temperature; Add several times 4 in the reaction process, the 4-diphenylmethane diisocyanate is glutinous to increase, and detects viscosity at any time in good time; Add the mixed solvent formed by toluene, N and butanone along with the rising of viscosity to dilute; It is complete to treat to add when viscosity is elevated to a certain degree organo-siloxane, ultraviolet-resistant absorbent and matting agent sustained reaction, and the control specification is 600～1000PS/25 ℃, makes said temperature sensitive type waterproof moisture-penetrating urethane resin.
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| CN101914854A (en) | 2010-12-15 |
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