CN106065059A - A kind of aqueous polyurethane for sofa artificial leather bass and preparation method thereof - Google Patents
A kind of aqueous polyurethane for sofa artificial leather bass and preparation method thereof Download PDFInfo
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- CN106065059A CN106065059A CN201610470985.3A CN201610470985A CN106065059A CN 106065059 A CN106065059 A CN 106065059A CN 201610470985 A CN201610470985 A CN 201610470985A CN 106065059 A CN106065059 A CN 106065059A
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- aqueous polyurethane
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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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- 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
- C08G18/4804—Two or more polyethers of different physical or chemical nature
-
- 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
- C08G18/4825—Polyethers containing two hydroxy groups
-
- 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
- C08G18/58—Epoxy resins
- C08G18/584—Epoxy resins having nitrogen
-
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1477—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing nitrogen
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
- D06N3/146—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes characterised by the macromolecular diols used
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The present invention provides a kind of aqueous polyurethane for sofa artificial leather bass and preparation method thereof, and this aqueous polyurethane includes the raw material of following weight portion: polyisocyanates 15 40 parts；Polyether polyol 80～100 parts；The epoxy resin 26 parts that glycine is modified；Hydrophilic chain extender 25 parts；Catalyst 0.01 0.5 parts；PH auxiliary agent 1 4.5 parts；Ethylenediamine 38 parts.The present invention adds glycine modified epoxy, the epoxide group of glycine modified epoxy plays the effect of crosslinking, form abundant network structure, thus accelerate the speed of the film-forming of resin, make acquisition aqueous polyurethane good stability, weatherability excellent simultaneously.
Description
Technical field
The present invention relates to field of waterborne polyurethane, specifically disclose a kind of aqueous polyurethane for sofa artificial leather bass and
Preparation method.
Background technology
At present, Synthetic Leather is widely used and quickly develops, and its special structure makes it have excellence
Chemical property, such as unique pliability, low temperature resistant, wear-resisting, caking property and high cohesion can etc., therefore this product is led in many
Territory is all widely used.Especially waterborne polyurethane synthetic leather, it not only has the chemical property of above-mentioned excellence, has more ring
Guarantor, nontoxic character, thus obtain liking of numerous clients.But conjunction prepared by most of aqueous polyurethane in the market
The validity period of finished leather product can only achieve 3-4, the phenomenon there will be crackle afterwards, being easily peeled.The validity period length of synthetic leather
Influence whether the quality of whole product, especially as the product of sofa artificial leather class.So need badly a kind of for have good weatherability,
The aqueous polyurethane of the husky leather that peel strength is high solves the problems referred to above.
Summary of the invention
It is an object of the invention to overcome existing defect, it is provided that a kind of aqueous polyurethane for sofa artificial leather bass and
Preparation method, is obtained sofa artificial leather by this resin and has a preferable feel, excellent weatherability, the advantage of folding resistance.
In order to realize object above, the present invention is by including what techniques below scheme realized: a kind of for sofa artificial leather bass
Aqueous polyurethane, including the raw material of following weight portion:
Preferably, described polyether polyol selected from PolyTHF ethoxylated polyhydric alcohol, polyoxypropylene polyol any one
Plant or multiple.
Preferably, described polyisocyanates is selected from toluene diisocyanate, methyl diphenylene diisocyanate, isophorone
In diisocyanate, hexamethylene diisocyanate and dicyclohexyl diisocyanate any one or multiple.
Preferably, described catalyst selected from organic zinc compound, organo-tin compound, organic alkali metal salt, tertiary amine and
Any one or more in salt compound.
Preferably, described organic zinc compound in zinc Isoocatanoate, zinc octoate and zinc acetylacetonate any one；Described
Organo-tin compound is selected from dibutyl tin laurate and stannous octoate any one；Described organic alkali metal salt is sodium acetate.
Preferably, described glycine modified epoxy is according to (1.5-2.5) by epoxy resin and glycine: 1 rub
You prepare than carrying out reaction；Wherein, reaction temperature is 50-100 DEG C, and reaction pH is 7-8.
It is highly preferred that described epoxy resin is bisphenol A type epoxy resin.
Preferably, described pH auxiliary agent is amine auxiliary agent, such as triethylamine.
The present invention also provides for the preparation method of a kind of aqueous polyurethane for sofa artificial leather bass, at least includes following step
Rapid:
1) add polyisocyanates, polyether polyol, under the conditions of 80-90 DEG C, carry out prepolymerization reaction；
2) add epoxy resin, hydrophilic chain extender and the catalyst that glycine is modified, under the conditions of 60-70 DEG C, carry out chain extension
Reaction.
In sum, the present invention provides a kind of aqueous polyurethane for sofa artificial leather bass and preparation method thereof, the present invention
Beneficial effect: the present invention adds glycine modified epoxy, and the epoxy radicals of glycine modified epoxy is hydrophilic base
Group so that acquisition aqueous polyurethane good stability, weatherability are excellent；Further, glycine modified epoxy uses bisphenol A-type
Epoxy resin, thus improve the mechanical property of aqueous polyurethane, improve the stripping of the sofa artificial leather bass prepared by aqueous polyurethane
Intensity.
Detailed description of the invention
The present invention is expanded on further below in conjunction with embodiment.Should be understood that embodiment is merely to illustrate the present invention, and unrestricted
The scope of the present invention.
It is critical only that of the present invention adds glycine modified epoxy, and the epoxy radicals of propylhomoserin modified epoxy is parent
Aqueous group so that acquisition aqueous polyurethane good stability, weatherability are excellent, and the goods of aqueous polyurethane have good physics
Mechanical performance.Preferably, the epoxy resin that glycine is modified is the bisphenol A type epoxy resin that glycine is modified.
The bisphenol A type epoxy resin of glycine modification is reacted with glycine in the basic conditions by bisphenol A type epoxy resin
Prepare.It prepares concrete course of reaction: after being mixed with bisphenol A type epoxy resin by glycine units, 50-100 DEG C, pH be
2-4h is reacted, it is thus achieved that the bisphenol A type epoxy resin that glycine is modified, as shown in reaction equation (1) under the conditions of 7-8.Described mixing
Mode can be to stand, vibrate, stir or ultrasonic disperse, so that glycine units is the most equal with bisphenol A type epoxy resin
Even mixing.If the bisphenol A type epoxy resin relative molecular mass selected is relatively low, reaction temperature is less than 50 DEG C；Bisphenol A-type ring
During epoxy resins relative molecular mass is equal, reaction temperature controls between 50-95 DEG C；Bisphenol A type epoxy resin relative molecular mass
Higher, reaction temperature controls at 95-100 DEG C, the highest.
The mol ratio that in reaction equation (1), glycine units mixes with bisphenol A type epoxy resin is 1:(1.5-2.5), preferably
Ground, mol ratio is 1:2,1:1.5,1:2.5, and all using mol ratio in detail below in embodiment is that glycine prepared by 1:2 is modified
Epoxy resin.
Wherein, polyether polyol selected from PolyTHF ethoxylated polyhydric alcohol, polyoxypropylene polyol any one or
Multiple, such as: polypropylene glycol (PPG), PTMG；The preferred diisocyanate of polyisocyanates, such as toluene two
Carbimide, methyl diphenylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexyl
Diisocyanate.
The invention provides the preparation method of a kind of aqueous polyurethane for sofa artificial leather bass, comprise the following steps:
First, perform step 1), add polyisocyanates, polyether polyol, under the conditions of 80-90 DEG C, carry out pre-polymerization anti-
Should, the response time is 2-3h.
Then, perform step 2), add epoxy resin, hydrophilic chain extender and catalyst that glycine is modified, at 60-70 DEG C
Under the conditions of carry out chain extending reaction, the response time is 3-4h.
In step 1), 2) in, temperature is relatively big on the impact of course of reaction, need to control temperature in course of reaction.
In step 2) in, hydrophilic chain extender is carboxylic acid type chain extender, preferably dihydromethyl propionic acid.
In step 2) in, the epoxy resin of glycine modification is to join aqueous polyurethane molecular structure as chain extender
In, the epoxide group of epoxy resin, the introducing of hydrophilic group can increase the stability of resin；The introducing of epoxide group can be with shape
The network structure that one-tenth is abundant, and accelerate the film-forming of resin, improve the resistant of high or low temperature of waterborne polyurethane resin, weatherability；
Preferably, epoxy resin uses bisphenol A type epoxy resin, has good physical property.
Finally, perform step 3), add pH auxiliary agent, be subsequently adding frozen water emulsifying, add ethylenediamine and carry out rear chain extending reaction,
After stirring 30-50min, it is thus achieved that aqueous polyurethane emulsion.
Wherein, pH auxiliary agent is amine auxiliary agent, preferably triethylamine, and triethylamine is alkalescence, can generate salt with acid, at this
Be used for neutralization procedure 2 in bright) in the hydroxy-acid group of hydrophilic chain extender in chain extending reaction.
In step 3) in use frozen water be that the temperature of rear chain extending reaction is controlled in low temperature range, such as 0 DEG C.
Below in conjunction with specific embodiment, technical scheme is illustrated.
Embodiment 1
In there-necked flask, add 75g PPG-3000,25g PTMG, be subsequently adding 10g dicyclohexyl
Methane diisocyanate, 30g isophorone diisocyanate are heated to 90 DEG C and carry out prepolymerization reaction, react 2h；It is subsequently adding 5g
The epoxy resin of glycine modification, 4g dihydromethyl propionic acid, 0.2g zinc octoate, be heated to 70 DEG C and carry out chain extending reaction, react 3h,
Add triethylamine 3g to neutralize, be subsequently adding frozen water emulsifying, add 4g ethylenediamine and carry out rear chain extending reaction, after stirring 30min, it is thus achieved that
Aqueous polyurethane emulsion.
Embodiment 2
In there-necked flask, add 75g PPG-3000,25g PTMG, be subsequently adding 10g toluene two different
Cyanate ester, 30g isophorone diisocyanate are heated to 90 DEG C and carry out prepolymerization reaction, react 2h；It is subsequently adding 5g glycine to change
Property epoxy resin, 4g dihydromethyl propionic acid, 0.5g dibutyl tin laurate, being heated to 70 DEG C carries out chain extending reaction, reacts 3h,
Add triethylamine 3g to neutralize, be subsequently adding frozen water emulsifying, add 8g ethylenediamine and carry out rear chain extending reaction, after stirring 30min, it is thus achieved that
Aqueous polyurethane emulsion.
Embodiment 3
In there-necked flask, add 70g PPG-3000,20g PTMG, be subsequently adding 15g dicyclohexyl
Methane diisocyanate, 10g isophorone diisocyanate are heated to 80 DEG C and carry out prepolymerization reaction, react 3h；It is subsequently adding 3g
The epoxy resin of glycine modification, 3g dihydromethyl propionic acid, 0.1g zinc octoate, be heated to 65 DEG C and carry out chain extending reaction, react 4h,
Add triethylamine 2.3g to neutralize, be subsequently adding frozen water emulsifying, add 4g ethylenediamine and carry out rear chain extending reaction, after stirring 30min, obtain
Obtain aqueous polyurethane emulsion.
Embodiment 4
In there-necked flask, add 70g PPG-3000,20g PTMG, be subsequently adding 25g hexa-methylene
Diisocyanate is heated to 80 DEG C and carries out prepolymerization reaction, reacts 3h；It is subsequently adding the modified epoxy resin of 3g glycine, 3g dihydroxy
Methylpropanoic acid, 0.1g sodium acetate, be heated to 65 DEG C and carry out chain extending reaction, react 4h, adds triethylamine 2.3g and neutralizes, is subsequently adding
Frozen water emulsifying, adds 5g ethylenediamine and carries out rear chain extending reaction, after stirring 30min, it is thus achieved that aqueous polyurethane emulsion.
Embodiment 5
In there-necked flask, add 65g PPG-3000,15g PTMG, be subsequently adding 10g dicyclohexyl
Methane diisocyanate, 5g isophorone diisocyanate are heated to 85 DEG C and carry out prepolymerization reaction, react 3h；It is subsequently adding 2g sweet
The epoxy resin of propylhomoserin modification, 2g dihydromethyl propionic acid, 0.05g zinc octoate, be heated to 60 DEG C and carry out chain extending reaction, react 4h,
Add triethylamine 2.3g to neutralize, be subsequently adding frozen water emulsifying, add 5g ethylenediamine and carry out rear chain extending reaction, after stirring 40min, obtain
Obtain aqueous polyurethane emulsion.
Embodiment 6
In there-necked flask, add 65g PPG-2000,15g PTMG, be subsequently adding 10g toluene two different
Cyanate ester, 5g isophorone diisocyanate are heated to 85 DEG C and carry out prepolymerization reaction, react 3h；It is subsequently adding 2g glycine modified
Epoxy resin, 2g dihydromethyl propionic acid, 0.05g zinc octoate, be heated to 60 DEG C and carry out chain extending reaction, react 4h, add three second
Amine 2.3g neutralizes, and is subsequently adding frozen water emulsifying, adds 5g ethylenediamine and carries out rear chain extending reaction, after stirring 40min, it is thus achieved that aqueous is gathered
Urethane emulsion.
Embodiment 7
In there-necked flask, add 65g PPG-2000,15g PTMG, be subsequently adding 15g diphenylmethyl
Alkane diisocyanate is heated to 85 DEG C and carries out prepolymerization reaction, reacts 3h；It is subsequently adding the modified epoxy resin of 2g glycine, 2g bis-
Hydroxymethyl propionic acid, 0.05g zinc octoate, be heated to 60 DEG C and carry out chain extending reaction, react 4h, adds triethylamine 2.3g and neutralizes, then
Add frozen water emulsifying, add 5g ethylenediamine and carry out rear chain extending reaction, after stirring 40min, it is thus achieved that aqueous polyurethane emulsion.
Comparative example 8
In there-necked flask, add 70g PPG-3000,20g PTMG, be subsequently adding 25g hexa-methylene
Diisocyanate is heated to 80 DEG C and carries out prepolymerization reaction, reacts 3h；It is subsequently adding 6g dihydromethyl propionic acid, 0.1g sodium acetate, adds
Heat carries out chain extending reaction to 65 DEG C, reacts 4h, adds triethylamine 2.3g and neutralizes, be subsequently adding frozen water emulsifying, adds 5g ethylenediamine
Carry out rear chain extending reaction, after stirring 30min, it is thus achieved that aqueous polyurethane emulsion.
Method of testing:
Above-described embodiment 1～7 is obtained aqueous polyurethane with comparative example 8 and prepares sofa artificial leather with identical technique respectively,
Sofa artificial leather includes inter-adhesive base material and film.
(1) peel strength test: then the film to each sofa artificial leather carries out peel strength test, and wherein, broadwise refers to
The cloth length direction of base material, warp-wise refers to the direction of transverse yarns on base material.Take the sofa artificial leather of 3cm × 3cm
Release coated film, tests and records the newton number peeling off required power.
(2) folding resistance test: test whether each sofa artificial leather crackle occurs after 100,000 bendings at normal temperatures.
(3) weatherability test: by embodiment 1～7 and the sofa artificial leather that obtains of comparative example 8 at temperature 70 C, humidity 95%
After condition places 336h, test the peel strength of each sofa artificial leather, and flexibility (23 DEG C).
Test result:
From table 1,2 can be seen that embodiment 1～7 and comparative example 8 obtain sofa artificial leather and all reach in the peel strength of warp-wise and broadwise
To 30N/3cm, at normal temperatures, the most flawless after 100,000 doublings；Sofa artificial leather embodiment 1～8 obtained is at temperature 70 C, wet
After the condition of degree 95% places 336h, the most cracking phenomenon, but test obtains the song of the sofa artificial leather that embodiment 1～7 obtains
Rich property is higher than comparative example 8；Embodiment 1～7 and comparative example 8 peel strength all decline, but add the asphalt mixtures modified by epoxy resin that glycine is modified
The peel strength of the sofa artificial leather of fat declines 7-11N/3cm, and is not added with the stripping of the sofa artificial leather of the modified epoxy resin of glycine
Intensity have dropped 20N/3cm.Can illustrate from test result, the epoxy resin adding glycine modified can well improve skin
The weatherability of leather, folding resistance.
The technical performance testing result of the sofa artificial leather bass of table 1 embodiment 1 to 4 preparation
The technical performance testing result of the sofa artificial leather bass of table 2 embodiment 5 to 8 preparation
To sum up, the present invention adds glycine modified epoxy, and the epoxide group of glycine modified epoxy plays friendship
The effect of connection, forms abundant network structure, thus accelerates the speed of the film-forming of resin, makes to obtain the poly-ammonia of aqueous simultaneously
Ester good stability, weatherability are excellent；The structure ring of bisphenol-A is introduced in polyurethane by glycine modified epoxy resin, thus
Improve the mechanical property of aqueous polyurethane, improve the peel strength of the sofa artificial leather bass prepared by aqueous polyurethane.So, this
Bright effectively overcome various shortcoming of the prior art and have high industrial utilization.
The above, only presently preferred embodiments of the present invention, not any formal and substantial to present invention restriction,
It should be pointed out that, for those skilled in the art, on the premise of without departing from the inventive method, also can make
Some improvement and supplement, these improve and supplement also should be regarded as protection scope of the present invention.All those skilled in the art,
Without departing from the spirit and scope of the present invention, make when available disclosed above technology contents a little more
The equivalent variations moved, modify and develop, is the Equivalent embodiments of the present invention；Meanwhile, all substantial technological pair according to the present invention
The change of any equivalent variations that above-described embodiment is made, modify and develop, all still fall within the scope of technical scheme
In.
Claims (8)
1. the aqueous polyurethane for sofa artificial leather bass, it is characterised in that: include the raw material of following weight portion:
Polyisocyanates 15-40 part；
Polyether polyol 80～100 parts；
Epoxy resin 2-6 part that glycine is modified；
Hydrophilic chain extender 2-5 part；
Catalyst 0.01-0.5 part；
PH auxiliary agent 1-4.5 part；
Ethylenediamine 3-8 part.
2. the aqueous polyurethane for sofa artificial leather bass as claimed in claim 1, it is characterised in that: described polyether polyol is selected
From PolyTHF ethoxylated polyhydric alcohol, polyoxypropylene polyol any one or multiple.
3. the aqueous polyurethane for sofa artificial leather bass as claimed in claim 1, it is characterised in that: described polyisocyanates selects
From toluene diisocyanate, methyl diphenylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and
In dicyclohexyl diisocyanate any one or multiple.
4. the aqueous polyurethane for sofa artificial leather bass as claimed in claim 1, it is characterised in that: described catalyst is selected from having
Any one or more in machine zinc compound, organo-tin compound, organic alkali metal salt, tertiary amine and salt compound thereof.
5. the aqueous polyurethane for sofa artificial leather bass as claimed in claim 1, it is characterised in that: described pH auxiliary agent is that amine helps
Agent.
6. the aqueous polyurethane for sofa artificial leather bass as claimed in claim 1, it is characterised in that: described glycine modification ring
Epoxy resins is according to (1.5-2.5) by epoxy resin and glycine: the mol ratio of 1 carries out reaction and prepares, and its reaction temperature is 50-
100 DEG C, reaction pH is 7-8.
7. the aqueous polyurethane for sofa artificial leather bass as claimed in claim 6, it is characterised in that: described epoxy resin is double
Phenol A type epoxy resin.
8. the method preparing the aqueous polyurethane for sofa artificial leather bass as described in claim 1 to 7 is arbitrary, its feature
It is: at least comprise the following steps:
1) add described polyisocyanates, described polyether polyol, under the conditions of 80-90 DEG C, carry out prepolymerization reaction；
2) epoxy resin, described hydrophilic chain extender and described catalyst that described glycine is modified are added, under the conditions of 60-70 DEG C
Carry out chain extending reaction.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108948322A (en) * | 2018-06-01 | 2018-12-07 | 合肥科天水性科技有限责任公司 | A kind of waterborne polyurethane resin for sofa artificial leather, preparation method and applications |
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| CN106065059B (en) | 2018-07-27 |
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