CN107936211A - A kind of aqueous polyurethane of pigment dyeing and preparation method thereof - Google Patents
A kind of aqueous polyurethane of pigment dyeing and preparation method thereof Download PDFInfo
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- CN107936211A CN107936211A CN201711194407.2A CN201711194407A CN107936211A CN 107936211 A CN107936211 A CN 107936211A CN 201711194407 A CN201711194407 A CN 201711194407A CN 107936211 A CN107936211 A CN 107936211A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The embodiment of the present application shows a kind of aqueous polyurethane of pigment dyeing and preparation method thereof, and the polyurethane includes：Polytetramethylene ether diol：2 mass parts, 5 mass parts；Poly- carbon polyol：10 mass parts, 15 mass parts；Hexamethylene diisocyanate：40 mass parts, 74 mass parts；Monoethanolamine：2 mass parts, 10 mass parts；PH adjusting agent：0.1 mass parts, 1 mass parts；Surfactant：0.2 mass parts, 0.5 mass parts.The embodiment of the present application shows that aqueous polyurethane easily dyes, and is prepared into coating, and small, good color fastness is influenced on coating material feel, meanwhile, polyurethane performance is stablized, and is not susceptible to decompose under acid or alkalescence environment.
Description
Technical field
The present invention relates to dyestuff preparing technical field, the aqueous polyurethane of more particularly to a kind of pigment dyeing and its preparation
Method.
Background technology
Coating is a kind of matching engineering material for the continuous film that firm attachment can be simultaneously formed coated in body surface, its
It is widely used in industrial production and daily life, plays the positive effect of protection base material and aesthetic appeal.With various countries
The enhancing of sound and people's environmental consciousness of environmental regulation, volatile organic compounds in traditional solvent-borne coating and harmful
The discharge capacity of air pollutants is limited be subject to more and more stringent, exploitation low stain, high-performance, multi-functional environment-friendly type aqueous painting
Material becomes the Main way of coating technology development.Waterborne two-component polyurethane coating is by the height of solvent-type double-component polyurethane coating
The low organic compound emission of performance and water paint is combined, and becomes the hot spot of coatings industry research.
Since the 1990s, the research to dual-component aqueous polyurethane is concentrated mainly on dual-component aqueous polyurethane
In synthesis and its research of basic theory, by the development of more than ten years, the Related product of waterborne two-component polyurethane coating is
It is used successfully to market.Dual-component aqueous polyurethane is by the water-based polyol resin of hydroxyl and the more isocyanides of low viscosity containing NCO group
Acid esters curing agent forms.Hydroxy resin is adjustable with polymer architecture, emulsion particle configuration designability, and can also assign a variety of
Feature, is the important factor in order of bi-component waterborne coating property.
During the polyurethane that polyurethane Preparation Method shown in the prior art prepares is in applied to coating, lead to
Coating material feel often is changed, it is partially hard to frequently result in the feel of coating material, meanwhile, coating fastness of the coating to coating material
Bad, polyurethane is unstable, decomposes under acid or alkalescence environment.
The content of the invention
The goal of the invention of the present invention is to provide a kind of aqueous polyurethane of pigment dyeing and preparation method thereof, existing to solve
There is technical problem existing for the polyurethane that the polyurethane Preparation Method shown in technology prepares.
The embodiment of the present application first aspect shows a kind of aqueous polyurethane of pigment dyeing, and the polyurethane includes：
Polytetramethylene ether diol：- 5 mass parts of 2 mass parts；
Poly- carbon polyol：- 15 mass parts of 10 mass parts；
Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts；
Monoethanolamine：- 10 mass parts of 2 mass parts；
PH adjusting agent：- 1 mass parts of 0.1 mass parts；
Surfactant：- 0.5 mass parts of 0.2 mass parts.
Selectable, the molecular weight of the polytetramethylene ether diol is：5000.
Selectable, the quality one's share of expenses for a joint undertaking amount of the poly- carbon polyol is：1000.
The embodiment of the present application second aspect shows a kind of preparation method of the aqueous polyurethane of pigment dyeing, the method
Including：
Prepolymerization：Weigh polytetramethylene ether diol：- 5 mass parts of 2 mass parts；Poly- carbon polyol：10 mass parts-
15 mass parts；Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts, solvent are added in reactor, and it is anti-that prepolymerization occurs
Should, 2h is reacted, solvent is then sloughed, obtains prepolymerization product；
Adjust pH：- 10 mass parts of 2 mass parts of monoethanolamine are added in prepolymerization product, by pH adjusting agent：0.1 matter
The mass parts of part -1 are measured, add prepolymerization product, adjust the pH to 4.0-5.0 of prepolymerization product, it is poly- to obtain acid neutralization
Close reaction product；
Emulsion reaction：Surfactant in polymeric reaction product is neutralized to acid, is stirred, obtains pigment dyeing use
Aqueous polyurethane.
Selectable, in the prepolymerization step, prepolymerization reaction temperature is 80-100 DEG C.
Selectable, in the emulsion reaction step, the speed of stirring is 1500-2000r/min.
Selectable, pH adjusting agent is：For the one or more mixing in triethylamine, glacial acetic acid.
It is selectable, it is described then the step of slough solvent in, reaction temperature is 120-150 DEG C.
Selectable, solvent is：Acetone, butanone, N- ethyl pyrrolidones, are 10-30% by weight addition；Water is pressed
Weight ratio addition is 50-70%.
From above technical scheme, the embodiment of the present application shows aqueous polyurethane and its preparation of a kind of pigment dyeing
Method, the polyurethane include：Polytetramethylene ether diol：- 5 mass parts of 2 mass parts；Poly- carbon polyol：- 15 matter of 10 mass parts
Measure part；Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts；Monoethanolamine：- 10 mass parts of 2 mass parts；PH adjusting agent：
- 1 mass parts of 0.1 mass parts；Surfactant：- 0.5 mass parts of 0.2 mass parts.The embodiment of the present application shows that aqueous polyurethane holds
Easy dyeing, is prepared into coating, and small, good color fastness is influenced on coating material feel, meanwhile, polyurethane performance is stablized, acid or
It is not susceptible to decompose under the environment of alkalescence.
Method shown in the embodiment of the present application includes：Prepolymerization：Weigh polytetramethylene ether diol：2 mass parts -5
Mass parts；Poly- carbon polyol：- 15 mass parts of 10 mass parts；Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts, solvent
Add in reactor, prepolymerization occurs, react 2h, then slough solvent, obtain prepolymerization product；Adjust pH：Will
PH adjusting agent：- 1 mass parts of 0.1 mass parts, add prepolymerization product, adjust the pH to 4.0- of prepolymerization product
5.0, obtain acid and neutralize polymeric reaction product；Emulsion reaction：Surfactant in polymeric reaction product is neutralized to acid, is sufficiently stirred
Uniformly, the aqueous polyurethane of pigment dyeing is obtained.
Method shown in the embodiment of the present application passes through polytetramethylene ether diol and the combination of poly- carbon polyol and hexa-methylene
Diisocyanate prepolymer reacts, and reaction a period of time adds monoethanolamine, is neutralized using pH adjusting agent acid, and it is anti-that emulsification finally occurs
Should.The base material handled using the method shown in the embodiment of the present application is easier to dye, and feel influences small, good color fastness.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the flow according to a preparation method for being preferable to carry out the aqueous polyurethane of a kind of pigment dyeing exemplified
Figure.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Whole description, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the present application first aspect shows a kind of aqueous polyurethane of pigment dyeing, and the polyurethane includes：It is poly-
Tetramethylene ether glycol：- 5 mass parts of 2 mass parts；Poly- carbon polyol：- 15 mass parts of 10 mass parts；Hexa-methylene diisocyanate
Ester：- 74 mass parts of 40 mass parts；Monoethanolamine：- 10 mass parts of 2 mass parts；PH adjusting agent：- 1 mass parts of 0.1 mass parts；Table
Face activating agent：- 0.5 mass parts of 0.2 mass parts.
Selectable, the molecular weight of the polytetramethylene ether diol is：5000.
Selectable, the quality one's share of expenses for a joint undertaking amount of the poly- carbon polyol is：1000.
Raw material prepared by polytetramethylene ether diol shown in the embodiment of the present application is tetrahydrofuran, monomer tetrahydrofuran into
Row ring-opening polymerisation, forms the glycols that main chain is made of carbochain and ether chain, linear structure, and hydroxyl is located at the both ends of main chain.Due to
The main chain of PTMEG is made of carbochain and ether chain, since without unsaturated bond, compliance is good, thus has preferable resistance to ag(e)ing
Can, mechanical property is optimal；Again due to without ester bond, and there is preferable anti-hydrolytic performance.And then ensure that the embodiment of the present application is shown
Polyurethane on coating material feel influence it is small.
The embodiment of the present application prepares polyurethane using polyether polyol as raw material.The polyether polyol is that main chain contains
Ehter bond (- R-O-R -), end group or side base contain the oligomer of more than 2 hydroxyls (- OH).Be with low molecular weight polyols,
Polyamine or compound containing active hydrogen are initiator ,-ring-opening polymerisation forms under catalyst action with oxyalkylene.Oxyalkylene
Hydrocarbon is mainly propylene oxide (propylene oxide), ethylene oxide (ethylene oxide), wherein mostly important with propylene oxide.Polyalcohol rises
Beginning agent has the trihydroxylic alcohol such as the dihydric alcohols such as propane diols, ethylene glycol, glycerine trimethylolpropane and season penta, tetrol, xylitol, sorb
The polyalcohols such as alcohol, sucrose；Amine initiator is diethylamine, diethylenetriamine etc..
Polyether polyol molecular weight shown in the embodiment of the present application is 5000, is neutralized with acid, it is in faint acidity to make polyethers.
And then ensure that the polyurethane that the embodiment of the present application prepares has good water resistance, impact resistance and low temperature properties.And then protect
The polyurethane that card application embodiment is prepared has good antiacid alkali ability.
The embodiment of the present application second aspect shows a kind of preparation method of the aqueous polyurethane of pigment dyeing, refers to figure
1, the described method includes：
S101 weighs polytetramethylene ether diol：- 5 mass parts of 2 mass parts；Poly- carbon polyol：- 15 quality of 10 mass parts
Part；Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts, solvent are added in reactor, and prepolymerization, reaction occurs
2h, then sloughs solvent, obtains prepolymerization product；
- 10 mass parts of 2 mass parts of monoethanolamine are added in S102 prepolymerization products, by pH adjusting agent：0.1 mass
- 1 mass parts of part, add prepolymerization product, adjust the pH to 4.0-5.0 of prepolymerization product, obtain acid neutralization and polymerize
Reaction product；
S103 neutralizes surfactant in polymeric reaction product to acid, stirs, obtains the water of pigment dyeing
Property polyurethane.
Method shown in the embodiment of the present application includes：Prepolymerization：Weigh polytetramethylene ether diol：2 mass parts -5
Mass parts；Poly- carbon polyol：- 15 mass parts of 10 mass parts；Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts, solvent
Add in reactor, prepolymerization occurs, react 2h, then slough solvent, obtain prepolymerization product；Adjust pH：Will
PH adjusting agent：- 1 mass parts of 0.1 mass parts, add prepolymerization product, adjust the pH to 4.0- of prepolymerization product
5.0, obtain acid and neutralize polymeric reaction product；Emulsion reaction：Surfactant in polymeric reaction product is neutralized to acid, is sufficiently stirred
Uniformly, the aqueous polyurethane of pigment dyeing is obtained.
Selectable, in the prepolymerization step, prepolymerization reaction temperature is 80-100 DEG C.
Prepolymerization reaction temperature can ensure polytetramethylene ether diol for 80-100 DEG C, poly- carbon polyol, and, six methylenes
The polymerisation of group diisocyanate is smoothed out, while ensures that solvent is non-volatile during the reaction.
Selectable, in the emulsion reaction step, the speed of stirring is 1500-2000r/min.
Selectable, pH adjusting agent is：Triethylamine, be one or more of mixing in glacial acetic acid.
It is selectable, it is described then the step of slough solvent in, reaction temperature is 120-150 DEG C.
Selectable, solvent is：Acetone, butanone, N- ethyl pyrrolidones, are 10-30% by weight addition；Water is pressed
Weight ratio addition is 50-70%.
Method shown in the embodiment of the present application is using one or more of mixing in acetone, butanone, 1-methyl-2-pyrrolidinone
As solvent；
Polytetramethylene ether diol, poly- carbon polyol, and, hexamethylene diisocyanate passes through stirring in acetone
Subsequent ionization, solvent shown in the embodiment of the present application is to polytetramethylene ether diol, poly- carbon polyol, and, six methylenes
The prepolymerization product generated after group diisocyanate polymerisation, has anchor fixed effect, and then ensures to use the application
The base material for the method processing for implementing to exemplify is easier to dye, and feel influences small, good color fastness.
Embodiment 1：
Weigh polytetramethylene ether diol：2 mass parts；Poly- carbon polyol：10 mass parts；Hexamethylene diisocyanate：
42 mass parts, solvent add 80 DEG C of reaction temperature in reactor, and prepolymerization occurs, and react 2h, then slough solvent, slough
The temperature of solvent is 120 DEG C, obtains prepolymerization product；
2 mass parts of monoethanolamine are added in prepolymerization product, by pH adjusting agent：0.1 mass parts, it is anti-to add prepolymerization
Product is answered, adjusts the pH to 4.0 of prepolymerization product, acid is obtained and neutralizes polymeric reaction product；
Surfactant in polymeric reaction product is neutralized to acid, is stirred, the speed of stirring is 1500r/min,
Obtain the aqueous polyurethane of pigment dyeing.
Embodiment 2：
Weigh polytetramethylene ether diol：5 mass parts；Poly- carbon polyol：15 mass parts；Hexamethylene diisocyanate：
74 mass parts, solvent add 100 DEG C of reaction temperature in reactor, and prepolymerization occurs, and react 2h, then slough solvent, take off
The temperature for removing solvent is 150 DEG C, obtains prepolymerization product；
10 mass parts of monoethanolamine are added in prepolymerization product, by pH adjusting agent：1 mass parts, it is anti-to add prepolymerization
Product is answered, adjusts the pH to 4.0-5.0 of prepolymerization product, acid is obtained and neutralizes polymeric reaction product；
S103 neutralizes surfactant in polymeric reaction product to acid, stirs, the speed of stirring is 2000r/
Min, obtains the aqueous polyurethane of pigment dyeing.
Embodiment 3：
Weigh polytetramethylene ether diol：2 mass parts；Poly- carbon polyol：10 mass parts；Hexamethylene diisocyanate：
60 mass parts, solvent add 100 DEG C of reaction temperature in reactor, and prepolymerization occurs, and react 2h, then slough solvent, take off
The temperature for removing solvent is 120 DEG C, obtains prepolymerization product；
5 mass parts of monoethanolamine are added in prepolymerization product, by pH adjusting agent：0.1 mass parts, it is anti-to add prepolymerization
Product is answered, adjusts the pH to 5.0 of prepolymerization product, acid is obtained and neutralizes polymeric reaction product；
Surfactant in polymeric reaction product is neutralized to acid, is stirred, the speed of stirring is 1500r/min,
Obtain the aqueous polyurethane of pigment dyeing.
Embodiment 4：
Weigh polytetramethylene ether diol：5 mass parts；Poly- carbon polyol：10 mass parts；Hexamethylene diisocyanate 74
Mass parts, solvent add 80 DEG C of reaction temperature in reactor, and prepolymerization occurs, and react 2h, then slough solvent, slough molten
The temperature of agent is 150 DEG C, obtains prepolymerization product；
8 mass parts of monoethanolamine are added in prepolymerization product, by pH adjusting agent：1 mass parts, add prepolymerization
Product, adjusts the pH to 4.0 of prepolymerization product, obtains acid and neutralizes polymeric reaction product；
Surfactant in polymeric reaction product is neutralized to acid, is stirred, the speed of stirring is 2000r/min,
Obtain the aqueous polyurethane of pigment dyeing.
From above technical scheme, the embodiment of the present application shows aqueous polyurethane and its preparation of a kind of pigment dyeing
Method, the polyurethane include：Polytetramethylene ether diol：- 5 mass parts of 2 mass parts；Poly- carbon polyol：- 15 matter of 10 mass parts
Measure part；Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts；Monoethanolamine：- 10 mass parts of 2 mass parts；PH adjusting agent：
- 1 mass parts of 0.1 mass parts；Surfactant：- 0.5 mass parts of 0.2 mass parts.The embodiment of the present application shows that aqueous polyurethane holds
Easy dyeing, is prepared into coating, and small, good color fastness is influenced on coating material feel, meanwhile, polyurethane performance is stablized, in acidity
Or it is not susceptible to decompose under the environment of alkalescence.
Method shown in the embodiment of the present application includes：Prepolymerization：Weigh polytetramethylene ether diol：2 mass parts -5
Mass parts；Poly- carbon polyol：- 15 mass parts of 10 mass parts；Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts, solvent
Add in reactor, prepolymerization occurs, react 2h, then slough solvent, obtain prepolymerization product；Adjust pH：Will
PH adjusting agent：- 1 mass parts of 0.1 mass parts, add prepolymerization product, adjust the pH to 4.0- of prepolymerization product
5.0, obtain acid and neutralize polymeric reaction product；Emulsion reaction：Surfactant in polymeric reaction product is neutralized to acid, is sufficiently stirred
Uniformly, the aqueous polyurethane of pigment dyeing is obtained.
Method shown in the embodiment of the present application passes through polytetramethylene ether diol and the combination of poly- carbon polyol and hexa-methylene
Diisocyanate prepolymer reacts, and reaction a period of time adds monoethanolamine, is neutralized using pH adjusting agent acid, and it is anti-that emulsification finally occurs
Should.The base material handled using the method shown in the embodiment of the present application is easier to dye, and feel influences small, good color fastness.
Those skilled in the art will readily occur to the present invention its after considering specification and putting into practice invention disclosed herein
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by appended claim.
Claims (9)
1. a kind of aqueous polyurethane of pigment dyeing, it is characterised in that the polyurethane includes：
Polytetramethylene ether diol：- 5 mass parts of 2 mass parts；
Poly- carbon polyol：- 15 mass parts of 10 mass parts；
Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts；
Monoethanolamine：- 10 mass parts of 2 mass parts；
PH adjusting agent：- 1 mass parts of 0.1 mass parts；
Surfactant：- 0.5 mass parts of 0.2 mass parts.
2. polyurethane according to claim 1, it is characterised in that the molecular weight of the polytetramethylene ether diol is：
5000。
3. aqueous polyurethane according to claim 1, it is characterised in that the quality one's share of expenses for a joint undertaking amount of the poly- carbon polyol is：
1000。
A kind of 4. preparation method of the aqueous polyurethane of pigment dyeing, it is characterised in that the described method includes：
Prepolymerization：Weigh polytetramethylene ether diol：- 5 mass parts of 2 mass parts；Poly- carbon polyol：- 15 matter of 10 mass parts
Measure part；Hexamethylene diisocyanate：- 74 mass parts of 40 mass parts, solvent are added in reactor, prepolymerization occur, instead
2h is answered, then sloughs solvent, obtains prepolymerization product；
Adjust pH：- 10 mass parts of 2 mass parts of monoethanolamine are added in prepolymerization product, by pH adjusting agent：0.1 mass parts-
1 mass parts, add prepolymerization product, adjust the pH to 4.0-5.0 of prepolymerization product, obtain acid and neutralize polymerisation
Product；
Emulsion reaction：Surfactant in polymeric reaction product is neutralized to acid, stirs, obtains the water of pigment dyeing
Property polyurethane.
5. according to the method described in claim 4, it is characterized in that, in the prepolymerization step, prepolymerization reaction temperature is
80-100℃。
6. according to the method described in claim 5, it is characterized in that, in the emulsion reaction step, the speed of stirring is 1500-
2000r/min。
7. according to the method described in claim 6, it is characterized in that, pH adjusting agent is：Triethylamine, be glacial acetic acid in one kind or
Several mixing.
8. the method according to the description of claim 7 is characterized in that it is described then the step of slough solvent in, reaction temperature is
120-150℃。
9. according to the method described in claim 8, it is characterized in that, solvent is：Acetone, butanone, N- ethyl pyrrolidones, by weight
Amount is 10-30% than addition；Water is 50-70% by weight addition.
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| CN103073988A (en) * | 2013-01-17 | 2013-05-01 | 杭州电子科技大学 | Preparation method of epoxy resin-modified polyurethane emulsion leather finishing agent |
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