CN107778433A - A kind of preparation method of hydrophilic polyurethane material - Google Patents
A kind of preparation method of hydrophilic polyurethane material Download PDFInfo
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- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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Abstract
The invention discloses a kind of preparation method of hydrophilic polyurethane material, including：Step 1, diisocyanate is put into mechanical agitation in reactor with poly- hexanedioic acid ethylene glycol, to being completely dissolved, then to add silester and the 4h of end hydroxyl silicone oil ultrasonic reaction 2, obtain being modified prefabricated dispersion；Step 2, composite catalyst and initiator are added in the prefabricated dispersion of modification, after stirring, titanium dioxide alcohol liquid is added dropwise, the 4h of constant temperature and pressure ultrasonic reaction 2, obtains organic silicon modified polyurethane dispersant；Step 3, foaming agent is added into organic silicon modified polyurethane dispersant, 30 50min of reaction is evaporated under reduced pressure after stirring, then sealing pressing reacts 20 40min, obtains organic silicon modified polyurethane viscous fluid；Step 4, organic silicon modified polyurethane viscous fluid is put into pressurized, heated in reactor and reacts 2 4h, hydrophilic polyurethane material is obtained after quick pressure releasing.The preparation technology of the present invention is simple, and operating mode is easily controllable, and product quality is stable, green, is adapted to industrialized production.
Description
Technical field
The invention belongs to polyurethane material technical field, and in particular to a kind of preparation method of hydrophilic polyurethane material.
Background technology
Polyurethane material is the current best insulation material of performance in the world.Main chain is containing-NHCOO-constitutional repeating unit
A kind of polymer.English abbreviation PU.It is polymerized by isocyanates (monomer) with hydroxy compounds.Due to containing highly polar ammonia
Carbamate base, insoluble in non-polar group, there is good oil resistivity, toughness, wearability, resistance to ag(e)ing and cohesive.With
The material for adapting to wide temperature range (- 50-150 DEG C), including elastomer, thermoplastic resin and thermosetting can be made in different material
Resin.Not hydrolysis under high temperature, also not alkali-proof medium.Polyurethane elastomer be used as roller, conveyer belt, flexible pipe, auto parts,
Sole, synthetic leather, electric wire and medical artificial organ etc.；Flexible foam is used for vehicle, room, the pad of clothes, firmly
Matter foams are used as heat-insulated, sound-absorbing, packaging, insulation and low ratio foamed synthetic wood, coating be used for advanced vehicle, furniture, wood and
Metal protection, pond dam and building anti-seepage material, and fabric coating etc..Adhesive to metal, glass, ceramics, leather,
Fiber etc. has good adhesion strength.In addition polyurethane may also be fabricated which emulsion, magnetic material etc..
In recent years, as country has to face to environmental protection and the lifting of energy-saving and emission-reduction requirement, solvent borne polyurethane leather production
Face transition and upgrade.Aqueous polyurethane is as decentralized medium using water, is free of in dispersion liquid or containing minimal amount of organic solvent, removes
Outside excellent properties with solvent borne polyurethane, also there is environmentally friendly, nontoxic, energy-conservation, substituted using aqueous polyurethane molten
Formulation polyurethane turns into a kind of inevitable trend.But due to introducing more hydrophily on the molecular chain-end of aqueous polyurethane
Group so that it is poor in mechanical property, heat endurance, water-fast solvent resistance, so as to limit its extensive use.
Si-O-Si keys in silicone molecules with larger cohesive energy because causing the quasi-molecule with high temperature resistant, resistance to
The excellent performances such as hydrolysis.It is one kind of aqueous polyurethane leather research by organic-silicon-modified lifting mechanical property and fire resistance
Important directions.It is to be commonly used organosilicon auxiliary agent to be added directly into polyaminoester emulsion this physical admixture is blended
Method of modifying.But organosilicon and polyurethane resin, the compatibility especially between WATER AS FLOW MEDIUM is poor, and this method of modifying will
Cause the precipitation of organosilicon, cause product surface fuel-displaced, leather turns white, the side effects such as gloss declines.Recently, Chinese patent
CN102604026 proposes, being chemically synthesized process hides with by way of organic-silicon-modified polyurethane resin, to be obviously improved
The compatibility of machine silicon and polyurethane, improve mechanical property, thermal stability and the polyurethane tree that is apparent, but preparing of polyurethane leather
Fat is still based on solvent type, causes its low production efficiency and high energy consumption, process is complicated, is unfavorable for environmental protection.Chinese patent
CN103981716 is prepared for organic-silicon-modified aqueous polyurethane by multistep organic synthesis, but its preparation process is cumbersome severe
Carve, the aqueous polyurethane solid content of gained is low, is only applicable to do the surface conditioning agent of leather, and lacking with not color inhibition
Point.
The content of the invention
For the problems of the prior art, the present invention provides
To realize above technical purpose, the technical scheme is that：A kind of preparation method of hydrophilic polyurethane material,
It is characterized in that：Its preparation process is as follows：
Step 1, diisocyanate is put into reactor to mechanical agitation is to being completely dissolved with poly- hexanedioic acid ethylene glycol, then
Silester and end hydroxyl silicone oil ultrasonic reaction 2-4h are added, obtains being modified prefabricated dispersion；
Step 2, composite catalyst and initiator are added in the prefabricated dispersion of modification, after stirring, titanium dioxide is added dropwise
Titanium alcohol liquid, constant temperature and pressure ultrasonic reaction 2-4h, obtains organic silicon modified polyurethane dispersant；
Step 3, foaming agent is added into organic silicon modified polyurethane dispersant, reaction 30- is evaporated under reduced pressure after stirring
50min, then sealing pressing reaction 20-40min, obtains organic silicon modified polyurethane viscous fluid；
Step 4, organic silicon modified polyurethane viscous fluid is put into reactor pressurized, heated and reacts 2-4h, after quick pressure releasing
Obtain hydrophilic polyurethane material.
The mass ratio of diisocyanate and poly- hexanedioic acid ethylene glycol in the step 1 is 2-7:1, the diisocyanate
Using IPDI or hexamethylene diisocyanate, the addition of the silester is poly- hexanedioic acid second two
The 25-35% of alcohol quality, the addition of the end hydroxyl silicone oil are the 15-25% of poly- hexanedioic acid quality of glycol.
The end hydroxyl silicone oil uses both ends all for the hydroxyl hydrogen silicone oil of hydroxyl.
Mechanical agitation speed in step 1 is 3000-5000r/min, and the frequency of the ultrasonic reaction is 10-20kHz, temperature
Spend for 40-60 DEG C.
Composite catalyst in the step 2 uses porous oxidation aluminium base titanium platinum catalyst, and the composite catalyst adds
Amount is the 2-8% of poly- hexanedioic acid quality of glycol, and the initiator addition is the 10-15% of poly- hexanedioic acid quality of glycol,
The initiator uses di-cyclohexylperoxy di-carbonate, and the mixing speed is 2000-4000r/min.
The 20-50nm nano titanium oxides that the formula of titanium dioxide alcohol liquid in the step 2 is 10-20%, 1-5% gather
Vinylpyrrolidone, 75-89% absolute ethyl alcohols；The rate of addition of the titanium dioxide alcohol liquid is 10-20mL/min, the dioxy
The addition for changing titanium alcohol liquid is the 20-50% of poly- hexanedioic acid quality of glycol, and the pressure of the constant temperature and pressure ultrasonic reaction is 5-
9MPa, temperature are 110-150 DEG C, supersonic frequency 20-50kHz.
Foaming agent addition in the step 3 is the 2-7% of poly- hexanedioic acid quality of glycol, and the foaming agent uses carbon
Sour ammonium, the pressure for being evaporated under reduced pressure reaction are the 50-70% of atmospheric pressure, and temperature is 80-90 DEG C.
The pressure of sealing pressing reaction in the step 3 is 10-20MPa.
The pressure of pressurized, heated reaction in the step 4 is 8-12MPa, and temperature is 100-120 DEG C.
Quick pressure releasing speed in the step 4 is 10-15MPa/min.
Step 1 tentatively mixes diisocyanate with poly- hexanedioic acid ethylene glycol, forms mixed reaction solution, then adds silicic acid
Ethyl ester and end hydroxyl silicone oil, ultrasonic reaction are totally dispersed into mixed reaction solution, form material modified pre- of stable band
Dispersion processed.
Step 2 adds composite catalyst and initiator into the prefabricated dispersion of modification, titanium dioxide alcohol liquid is added dropwise, in perseverance
Ultrasonic reaction is carried out under warm constant-pressure conditions, catalyst improves the catalytic activity of titanium ion and platinum particles under ultrasound condition, drawn
Hair agent is decomposed in the condition, is ensured that hydroxyl is acted on to the end chain of diisocyanate and poly- hexanedioic acid ethylene glycol, is played and change
Property effect, while the polyurethane promoted between diisocyanate and poly- hexanedioic acid ethylene glycol synthesizes, and nano titanium oxide can
It is dispersed in polyurethane, is fixed nano titanium oxide by hole caused by cross-linking reaction, ensures the fixation of titanium dioxide, together
When can also play a part of filler with increase performance.
Foaming agent is added into organic silicon modified polyurethane dispersant in step 3, the mode foaming agent of stirring is totally dispersed into
Organic silicon modified polyurethane dispersant, being evaporated under reduced pressure and improving dispersant concentration by way of sealing pressing, foam simultaneously
Body occurs rupture and produces bubble, and hole caused by bubble acts in pressure to be further compacted, and plays a part of structure consolidation.
Organic silicon modified polyurethane viscous fluid is carried out pressurized, heated reaction by step 4 to infiltrate into polyurethane by pressure
Inside, and increase the heat power of molecule under heating condition, ensure internal and external pressure balance, external and internal pressure is brought by quick pressure releasing
Change, internal pressure will connect bad key bridge fracture, and form the connection effect of stabilized structure, ensure polyurethane material
It is firm.
From the above, it can be seen that the present invention possesses advantages below：
1. the preparation technology of the present invention is simple, operating mode is easily controllable, and product quality is stable, green, is adapted to industrialization
Production.
2. polyurethane material prepared by the present invention has good color inhibition, water-fast, heat-resisting and wear-resisting etc. performance, have good
Good mechanics and mechanical strength, improve traditional waterborne polyurethane in water resistance and poor mechanical property etc. defect.
Embodiment
Describe the present invention in detail in conjunction with the embodiments, but any restriction is not done to the claim of the present invention.
Embodiment 1
A kind of preparation method of hydrophilic polyurethane material, it is characterised in that：Its preparation process is as follows：
Step 1, diisocyanate is put into reactor to mechanical agitation is to being completely dissolved with poly- hexanedioic acid ethylene glycol, then
Silester and end hydroxyl silicone oil ultrasonic reaction 2h are added, obtains being modified prefabricated dispersion；
Step 2, composite catalyst and initiator are added in the prefabricated dispersion of modification, after stirring, titanium dioxide is added dropwise
Titanium alcohol liquid, constant temperature and pressure ultrasonic reaction 2h, obtains organic silicon modified polyurethane dispersant；
Step 3, foaming agent is added into organic silicon modified polyurethane dispersant, reaction 30min is evaporated under reduced pressure after stirring,
Then sealing pressing reaction 20min, obtains organic silicon modified polyurethane viscous fluid；
Step 4, organic silicon modified polyurethane viscous fluid is put into pressurized, heated in reactor and reacts 2h, obtained after quick pressure releasing
To hydrophilic polyurethane material.
The mass ratio of diisocyanate and poly- hexanedioic acid ethylene glycol in the step 1 is 2:1, the diisocyanate is adopted
With IPDI, the addition of the silester is the 25% of poly- hexanedioic acid quality of glycol, the end hydroxyl
The addition of base silicone oil is the 15% of poly- hexanedioic acid quality of glycol.
The end hydroxyl silicone oil uses both ends all for the hydroxyl hydrogen silicone oil of hydroxyl.
Mechanical agitation speed in step 1 is 3000r/min, and the frequency of the ultrasonic reaction is 10kHz, temperature 40
℃。
Composite catalyst in the step 2 uses porous oxidation aluminium base titanium platinum catalyst, and the composite catalyst adds
Amount is the 2% of poly- hexanedioic acid quality of glycol, and the initiator addition is the 10% of poly- hexanedioic acid quality of glycol, described to draw
Hair agent uses di-cyclohexylperoxy di-carbonate, and the mixing speed is 2000r/min.
The 20nm nano titanium oxides that the formula of titanium dioxide alcohol liquid in the step 2 is 10%, 1% polyvinyl pyrrole
Alkanone, 75% absolute ethyl alcohol；The rate of addition of the titanium dioxide alcohol liquid is 10mL/min, the addition of the titanium dioxide alcohol liquid
Measure as the 20% of poly- hexanedioic acid quality of glycol, the pressure of the constant temperature and pressure ultrasonic reaction is 5MPa, and temperature is 110 DEG C, is surpassed
Acoustic frequency is 20kHz.
Foaming agent addition in the step 3 is the 2% of poly- hexanedioic acid quality of glycol, and the foaming agent uses carbonic acid
Ammonium, the pressure for being evaporated under reduced pressure reaction is the 50% of atmospheric pressure, and temperature is 80 DEG C.
The pressure of sealing pressing reaction in the step 3 is 10MPa.
The pressure of pressurized, heated reaction in the step 4 is 8MPa, and temperature is 100 DEG C.
Quick pressure releasing speed in the step 4 is 10MPa/min.
Embodiment 2
A kind of preparation method of hydrophilic polyurethane material, it is characterised in that：Its preparation process is as follows：
Step 1, diisocyanate is put into reactor to mechanical agitation is to being completely dissolved with poly- hexanedioic acid ethylene glycol, then
Silester and end hydroxyl silicone oil ultrasonic reaction 4h are added, obtains being modified prefabricated dispersion；
Step 2, composite catalyst and initiator are added in the prefabricated dispersion of modification, after stirring, titanium dioxide is added dropwise
Titanium alcohol liquid, constant temperature and pressure ultrasonic reaction 4h, obtains organic silicon modified polyurethane dispersant；
Step 3, foaming agent is added into organic silicon modified polyurethane dispersant, reaction 50min is evaporated under reduced pressure after stirring,
Then sealing pressing reaction 40min, obtains organic silicon modified polyurethane viscous fluid；
Step 4, organic silicon modified polyurethane viscous fluid is put into pressurized, heated in reactor and reacts 4h, obtained after quick pressure releasing
To hydrophilic polyurethane material.
The mass ratio of diisocyanate and poly- hexanedioic acid ethylene glycol in the step 1 is 7:1, the diisocyanate is adopted
With hexamethylene diisocyanate, the addition of the silester is the 35% of poly- hexanedioic acid quality of glycol, the end hydroxyl
The addition of base silicone oil is the 25% of poly- hexanedioic acid quality of glycol.
The end hydroxyl silicone oil uses both ends all for the hydroxyl hydrogen silicone oil of hydroxyl.
Mechanical agitation speed in step 1 is 5000r/min, and the frequency of the ultrasonic reaction is 20kHz, temperature 60
℃。
Composite catalyst in the step 2 uses porous oxidation aluminium base titanium platinum catalyst, and the composite catalyst adds
Amount is the 8% of poly- hexanedioic acid quality of glycol, and the initiator addition is the 15% of poly- hexanedioic acid quality of glycol, described to draw
Hair agent uses di-cyclohexylperoxy di-carbonate, and the mixing speed is 4000r/min.
The 50nm nano titanium oxides that the formula of titanium dioxide alcohol liquid in the step 2 is 20%, 5% polyvinyl pyrrole
Alkanone, 89% absolute ethyl alcohol；The rate of addition of the titanium dioxide alcohol liquid is 20mL/min, the addition of the titanium dioxide alcohol liquid
Measure as the 50% of poly- hexanedioic acid quality of glycol, the pressure of the constant temperature and pressure ultrasonic reaction is 9MPa, and temperature is 150 DEG C, is surpassed
Acoustic frequency is 50kHz.
Foaming agent addition in the step 3 is the 7% of poly- hexanedioic acid quality of glycol, and the foaming agent uses carbonic acid
Ammonium, the pressure for being evaporated under reduced pressure reaction is the 70% of atmospheric pressure, and temperature is 90 DEG C.
The pressure of sealing pressing reaction in the step 3 is 20MPa.
The pressure of pressurized, heated reaction in the step 4 is 12MPa, and temperature is 120 DEG C.
Quick pressure releasing speed in the step 4 is 15MPa/min.
Embodiment 3
A kind of preparation method of hydrophilic polyurethane material, it is characterised in that：Its preparation process is as follows：
Step 1, diisocyanate is put into reactor to mechanical agitation is to being completely dissolved with poly- hexanedioic acid ethylene glycol, then
Silester and end hydroxyl silicone oil ultrasonic reaction 3h are added, obtains being modified prefabricated dispersion；
Step 2, composite catalyst and initiator are added in the prefabricated dispersion of modification, after stirring, titanium dioxide is added dropwise
Titanium alcohol liquid, constant temperature and pressure ultrasonic reaction 3h, obtains organic silicon modified polyurethane dispersant；
Step 3, foaming agent is added into organic silicon modified polyurethane dispersant, reaction 40min is evaporated under reduced pressure after stirring,
Then sealing pressing reaction 30min, obtains organic silicon modified polyurethane viscous fluid；
Step 4, organic silicon modified polyurethane viscous fluid is put into pressurized, heated in reactor and reacts 3h, obtained after quick pressure releasing
To hydrophilic polyurethane material.
The mass ratio of diisocyanate and poly- hexanedioic acid ethylene glycol in the step 1 is 5:1, the diisocyanate is adopted
With IPDI, the addition of the silester is the 30% of poly- hexanedioic acid quality of glycol, the end hydroxyl
The addition of base silicone oil is the 20% of poly- hexanedioic acid quality of glycol.
The end hydroxyl silicone oil uses both ends all for the hydroxyl hydrogen silicone oil of hydroxyl.
Mechanical agitation speed in step 1 is 4000r/min, and the frequency of the ultrasonic reaction is 15kHz, temperature 50
℃。
Composite catalyst in the step 2 uses porous oxidation aluminium base titanium platinum catalyst, and the composite catalyst adds
Amount is the 5% of poly- hexanedioic acid quality of glycol, and the initiator addition is the 13% of poly- hexanedioic acid quality of glycol, described to draw
Hair agent uses di-cyclohexylperoxy di-carbonate, and the mixing speed is 3000r/min.
The 40nm nano titanium oxides that the formula of titanium dioxide alcohol liquid in the step 2 is 15%, 5% polyvinyl pyrrole
Alkanone, 80% absolute ethyl alcohol；The rate of addition of the titanium dioxide alcohol liquid is 15mL/min, the addition of the titanium dioxide alcohol liquid
Measure as the 30% of poly- hexanedioic acid quality of glycol, the pressure of the constant temperature and pressure ultrasonic reaction is 7MPa, and temperature is 130 DEG C, is surpassed
Acoustic frequency is 4kHz.
Foaming agent addition in the step 3 is the 5% of poly- hexanedioic acid quality of glycol, and the foaming agent uses carbonic acid
Ammonium, the pressure for being evaporated under reduced pressure reaction is the 60% of atmospheric pressure, and temperature is 85 DEG C.
The pressure of sealing pressing reaction in the step 3 is 15MPa.
The pressure of pressurized, heated reaction in the step 4 is 10MPa, and temperature is 110 DEG C.
Quick pressure releasing speed in the step 4 is 12MPa/min.
Performance test
In summary, the present invention has advantages below：
1. the preparation technology of the present invention is simple, operating mode is easily controllable, and product quality is stable, green, is adapted to industrialization
Production.
2. polyurethane material prepared by the present invention has good color inhibition, water-fast, heat-resisting and wear-resisting etc. performance, have good
Good mechanics and mechanical strength, improve traditional waterborne polyurethane in water resistance and poor mechanical property etc. defect.
It is understood that above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to this
Technical scheme described by inventive embodiments.It will be understood by those within the art that still the present invention can be carried out
Modification or equivalent substitution, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (10)
- A kind of 1. preparation method of hydrophilic polyurethane material, it is characterised in that：Its preparation process is as follows：Step 1, diisocyanate is put into mechanical agitation in reactor with poly- hexanedioic acid ethylene glycol, to being completely dissolved, then to add Silester and end hydroxyl silicone oil ultrasonic reaction 2-4h, obtain being modified prefabricated dispersion；Step 2, composite catalyst and initiator are added in the prefabricated dispersion of modification, after stirring, titanium dioxide alcohol is added dropwise Liquid, constant temperature and pressure ultrasonic reaction 2-4h, obtains organic silicon modified polyurethane dispersant；Step 3, foaming agent is added into organic silicon modified polyurethane dispersant, reaction 30-50min is evaporated under reduced pressure after stirring, Then sealing pressing reaction 20-40min, obtains organic silicon modified polyurethane viscous fluid；Step 4, organic silicon modified polyurethane viscous fluid is put into pressurized, heated in reactor and reacts 2-4h, obtained after quick pressure releasing Hydrophilic polyurethane material.
- A kind of 2. preparation method of hydrophilic polyurethane material according to claim 1, it is characterised in that：The step 1 In the mass ratio of diisocyanate and poly- hexanedioic acid ethylene glycol be 2-7:1, the diisocyanate is different using isophorone two Cyanate or hexamethylene diisocyanate, the addition of the silester are the 25-35% of poly- hexanedioic acid quality of glycol, The addition of the end hydroxyl silicone oil is the 15-25% of poly- hexanedioic acid quality of glycol.
- A kind of 3. preparation method of hydrophilic polyurethane material according to claim 2, it is characterised in that：The terminal hydroxy group Silicone oil uses both ends all for the hydroxyl hydrogen silicone oil of hydroxyl.
- A kind of 4. preparation method of hydrophilic polyurethane material according to claim 1, it is characterised in that：In step 1 Mechanical agitation speed is 3000-5000r/min, and the frequency of the ultrasonic reaction is 10-20kHz, and temperature is 40-60 DEG C.
- A kind of 5. preparation method of hydrophilic polyurethane material according to claim 1, it is characterised in that：The step 2 In composite catalyst use porous oxidation aluminium base titanium platinum catalyst, the composite catalyst addition is poly- hexanedioic acid ethylene glycol The 2-8% of quality, the initiator addition are the 10-15% of poly- hexanedioic acid quality of glycol, and the initiator uses peroxidating Two dicyclohexyl carbonates, the mixing speed are 2000-4000r/min.
- A kind of 6. preparation method of hydrophilic polyurethane material according to claim 1, it is characterised in that：The step 2 In titanium dioxide alcohol liquid formula for 10-20% 20-50nm nano titanium oxides, 1-5% polyvinylpyrrolidones, 75-89% Absolute ethyl alcohol；The rate of addition of the titanium dioxide alcohol liquid is 10-20mL/min, and the addition of the titanium dioxide alcohol liquid is poly- The 20-50% of hexanedioic acid quality of glycol, the pressure of the constant temperature and pressure ultrasonic reaction is 5-9MPa, and temperature is 110-150 DEG C, Supersonic frequency is 20-50kHz.
- A kind of 7. preparation method of hydrophilic polyurethane material according to claim 1, it is characterised in that：The step 3 In foaming agent addition be poly- hexanedioic acid quality of glycol 2-7%, the foaming agent uses ammonium carbonate, the vacuum distillation The pressure of reaction is the 50-70% of atmospheric pressure, and temperature is 80-90 DEG C.
- A kind of 8. preparation method of hydrophilic polyurethane material according to claim 1, it is characterised in that：The step 3 In sealing pressing reaction pressure be 10-20MPa.
- A kind of 9. preparation method of hydrophilic polyurethane material according to claim 1, it is characterised in that：The step 4 In the pressure of pressurized, heated reaction be 8-12MPa, temperature is 100-120 DEG C.
- A kind of 10. preparation method of hydrophilic polyurethane material according to claim 1, it is characterised in that：The step 4 In quick pressure releasing speed be 10-15MPa/min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109422896A (en) * | 2017-08-24 | 2019-03-05 | 山东理工大学 | Foaming agent comprising primary amine salt and propyl alcohol amine salt and the purposes for polyurethane refrigerator ice cabinet foam-body material |
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