CN102533079A - Extinction-type water-based polyurethane finishing agent used for synthetic leather - Google Patents
Extinction-type water-based polyurethane finishing agent used for synthetic leather Download PDFInfo
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- CN102533079A CN102533079A CN2011104046227A CN201110404622A CN102533079A CN 102533079 A CN102533079 A CN 102533079A CN 2011104046227 A CN2011104046227 A CN 2011104046227A CN 201110404622 A CN201110404622 A CN 201110404622A CN 102533079 A CN102533079 A CN 102533079A
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Abstract
The invention relates to the field of synthetic leather, in particular to a polyurethane surface finishing agent used for synthetic leather. An extinction-type water-based polyurethane finishing agent used for synthetic leather comprises the following components in percentage by weight: 20-50 percent of emulsified anion polyurethane resin, 3-10 percent of water-based acrylic resin, 1-10 percent of extinction powder, 0.5-2 percent of wetting dispersant reagent, 0.5-3 percent of organic silicon feeling agent, 0.5-3 percent of thickening agent used for water-based polyurethane and 20-70 percent of deionized water, wherein the solid content of the water-based polyurethane surface finishing agent is 10-50 percent, and the viscosity is 500-5,000mPa.s. The polyurethane surface finishing agent solves the problem that the anti-sticking performance of middle-low-modulus water-based polyurethane resin is poorer, and the glossiness, transparency, anti-sticking performance and low-temperature storage stability of the product are superior to the current solvent type polyurethane leather treating agent.
Description
Technical field
The present invention relates to synthetic leather and make the field, relate in particular to extinction type waterborne polyurethane for synthetic leather finish.
Background technology
The synthetic leather finish is that synthetic leather is carried out aftertreatment, gives a kind of product of special gloss of synthetic leather and feel, and along with synthetic leather is used more and more widely, the demand of synthetic leather finish is also increasing.Extinction type use for synthetic leather polyurethane finishing agent adopts solvent borne polyurethane as carrier mostly on the market now; Organic solvents such as a large amount of DMF, TOL and MEK have been used; When finish oven dry film forming, solvent evaporates pollutes environment, does not meet current to environmental protection requirement.The solvent-borne type finish is owing to contain a large amount of inflammable solvents in addition, and the safety of storage and transportation also has hidden danger.
Summary of the invention
To the deficiency of solvent-borne type extinction type polyurethane decorative paint for leather, the object of the present invention is to provide extinction type waterborne polyurethane for synthetic leather finish.The present invention improves the dullness and the penetrating degree of water-based extinction type polyurethane finishing agent.
In order to realize above-mentioned purpose, the technical scheme below the present invention has adopted:
Extinction type waterborne polyurethane for synthetic leather finish, this waterborne polyurethane coating agent comprises following component by weight percentage:
Water-latex type anionic polyurethane resin 20%～50%
Water-borne acrylic resin 3%～10%
Flatting silica 1%～10%
Wetting dispersing agent 0.5%～2%
Organic silicon hand feeling agent 0.5%～3%
Aqueous polyurethane is with thickening material 0.5%～3%
Deionized water 20%～70%;
Above-mentioned waterborne polyurethane coating agent solid content is between 15%～45%, and viscosity is at 500～4000mPa. s.
As preferably, above-mentioned waterborne polyurethane coating agent comprises following component by weight percentage:
Water-latex type anionic polyurethane resin 25%～40%
Water-borne acrylic resin 5%～8%
Flatting silica 4%～8%
Wetting dispersing agent 1%～2%
Organic silicon hand feeling agent 1%～2.5%
Aqueous polyurethane is with thickening material 1%～2.5%
Deionized water 35%～65%.
As preferably, above-mentioned waterborne polyurethane coating agent comprises following component by weight percentage:
Water-latex type anionic polyurethane resin 30%～40%
Water-borne acrylic resin 5%～8%
Flatting silica 4%～8%
Wetting dispersing agent 1%～1.5%
Organic silicon hand feeling agent 1%～2%
Aqueous polyurethane is with thickening material 1%～2%
Deionized water 40%～65%.
As preferably, this above-mentioned waterborne polyurethane coating agent also comprises 0.5%～2% flow agent, and flow agent is silicone based flow agent.
As preferably, this above-mentioned waterborne polyurethane coating agent also comprises 0.1%～0.5% skimmer, and skimmer adopts the silicone skimmer.
As preferably, this above-mentioned waterborne polyurethane coating agent solid content is between 15～35%, and viscosity is at 800～2000 mPa. s.
As preferably, one or more in above-mentioned ammonia ester resin, polyester urethane resin and the polyether(poly)urethane resin, as preferably, the solid content of described water-latex type anionic polyurethane resin is 30%～45%.
As preferably, above-mentioned flatting silica is an aerosil class flatting silica, and wetting dispersing agent is selected polycarboxylate sodium's class dispersion agent for use.
As preferably, the auxiliary agent of polyether-modified dimethyl silica alkanes is selected in above-mentioned organic silicon hand feeling agent for use.
As preferably, above-mentioned aqueous polyurethane is selected polyurethane associative thickener for use with thickening material.
A kind of preparation method who prepares above-mentioned extinction type waterborne polyurethane for synthetic leather finish, this method comprises the steps:
1) in still, adds water-latex type anionic polyurethane resin and water-borne acrylic resin, stir;
2) add wetting dispersing agent and deionized water while stirring;
3) add the thickening material of formula ratio 40%～60%, stir 10～20min, treat that viscosity slightly rises after, add flatting silica while stirring;
4) flatting silica adds the back and stirs 20～40min, after the band flatting silica disperses fully, adds hand feeling agent, adds remaining thickening material then in batches, regulates waterborne polyurethane coating agent to suitable viscosity;
5) stir 20～40min, treat stable viscosity, measure viscosity in acceptability limit after, discharging.
It is main resin carrier that the present invention adopts the water-latex type anionic polyurethane resin, adopts the water dilution, does not add any organic solvent, and production and use all have favorable environment protection.Simultaneously because solvent type polyurethane resin is a solution-type; Film forming is even; Parcel property to flatting silica in filming is good, and the water-latex type anionic polyurethane resin is emulsion state existence, latex particle and flatting silica phase-splitting separately during film forming; Can't effectively wrap up flatting silica, the aqueous polyurethane delustring finish that is is not so good as solvent-borne type delustring finish on dullness and permeability.
For the dullness and the penetrating degree that improve water-based extinction type polyurethane finishing agent, the present invention improves from two aspects:
(1) selected for use suitable wetting dispersing agent to improve the dispersion of flatting silica in urethane resin.Because the surface tension of water is bigger, the flatting silica dispersed therein is that water is not so good as the solvent borne polyurethane system to its wetting ability.After adding wetting dispersing agent, the surface tension of system reduces greatly, and through dispersed with stirring, the transparency of smearing that obtains is significantly improved flatting silica more easily;
(2) in aqueous polyurethane, introduced a spot of water-borne acrylic resin; Because vinyl resin and urethane resin consistency are not fine; So can form slight phase separation after the oven dry of filming, and increase the roughness of film coated surface, improved apparent dullness.
Embodiment
Embodiment 1
The solid content that in mixing kettle, adds 20 parts is 20% waterborne polyurethane resin and 3 parts water-borne acrylic resin, and the skimmer that adds 0.1 part then stirs.The thickening material that adds 68.4 parts of water and 1.5 parts while stirring stirs 15min, treats that viscosity rising back stirs the flatting silica that the limit adds 4 parts.After stirring 30min, add 0.5 part flow agent and 0.5 part hand feeling agent, add remaining polyurethane associative thickener after stirring in batches; Stir 30min; The viscosity of surveying behind the stable viscosity is 1500 mPa. s, and discharging obtains solid content and be 20% extinction type waterborne polyurethane coating agent.
Embodiment 2
The solid content that in mixing kettle, adds 25 parts is 25% waterborne polyurethane resin and 5 parts water-borne acrylic resin, and the skimmer that adds 0.3 part then stirs.The thickening material that adds 63.5 parts of water and 0.6 part while stirring stirs 15min, treats that viscosity rising back stirs the flatting silica that the limit adds 2 parts.After stirring 30min, add 1 part flow agent and 1 part hand feeling agent, add remaining polyurethane associative thickener after stirring in batches; Stir 30min; The viscosity of surveying behind the stable viscosity is 600mPa. s, and discharging obtains solid content and be 15% extinction type waterborne polyurethane coating agent.
Embodiment 3
The solid content that in mixing kettle, adds 35 parts is 30% waterborne polyurethane resin and 8 parts water-borne acrylic resin, and the skimmer that adds 0.3 part then stirs.The thickening material that adds 48.7 parts of water and 0.5 part while stirring stirs 15min, treats that viscosity rising back stirs the flatting silica that the limit adds 5 parts.After stirring 30min, add 1.5 parts flow agent and 2 parts hand feeling agent, add remaining polyurethane associative thickener after stirring in batches; Stir 30min; The viscosity of surveying behind the stable viscosity is 1800 mPa. s, and discharging obtains solid content and be 25% extinction type waterborne polyurethane coating agent.
Embodiment 4
The solid content that in mixing kettle, adds 40 parts is 20% waterborne polyurethane resin and 3 parts water-borne acrylic resin, and the skimmer that adds 0.2 part then stirs.The thickening material that adds 39.5 parts of water and 0.9 part while stirring stirs 15min, treats that viscosity rising back stirs the flatting silica that the limit adds 6 parts.After stirring 30min, add 1.5 parts flow agent and 1.5 parts hand feeling agent, add remaining polyurethane associative thickener after stirring in batches; Stir 30min; The viscosity of surveying behind the stable viscosity is 3000 mPa. s, and discharging obtains solid content and be 27% extinction type waterborne polyurethane coating agent.
Embodiment 5
The solid content that in mixing kettle, adds 50 parts is 50% waterborne polyurethane resin and 10 parts water-borne acrylic resin, and the skimmer that adds 0.5 part then stirs.The thickening material that adds 24 parts of water and 0.25 part while stirring stirs 15min, treats that viscosity rising back stirs the flatting silica that the limit adds 8 parts.After stirring 30min, add 2 parts flow agent and 3 parts hand feeling agent, add remaining polyurethane associative thickener after stirring in batches; Stir 30min; The viscosity of surveying behind the stable viscosity is 1200 mPa. s, and discharging obtains solid content and be 44% extinction type waterborne polyurethane coating agent.
Test Example
Performance test, the glossiness test.
The extinction type waterborne polyurethane resin of preparation is coated the synthetic leather surface with the method for roller coating, and then toast 3min in 130 ℃ the baking oven, behind the complete drying, cooling is surveyed 60 degree angle glossiness with glossometer.
| Synthetic leather is untreated | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Pool degree (gloss unit) | 26 | 1.2 | 1.8 | 0.9 | 0.8 | 0.4 |
。
Claims (10)
1. extinction type waterborne polyurethane for synthetic leather finish is characterized in that this waterborne polyurethane coating agent comprises following component by weight percentage:
Water-latex type anionic polyurethane resin 20%～50%
Water-borne acrylic resin 3%～10%
Flatting silica 1%～10%
Wetting dispersing agent 0.5%～2%
Organic silicon hand feeling agent 0.5%～3%
Aqueous polyurethane is with thickening material 0.5%～3%
Deionized water 20%～70%;
Above-mentioned waterborne polyurethane coating agent solid content is between 15%～45%, and viscosity is at 500～4000mPa. s.
2. extinction type waterborne polyurethane for synthetic leather finish according to claim 1 is characterized in that this waterborne polyurethane coating agent comprises following component by weight percentage:
Water-latex type anionic polyurethane resin 25%～40%
Water-borne acrylic resin 5%～8%
Flatting silica 4%～8%
Wetting dispersing agent 1%～2%
Organic silicon hand feeling agent 1%～2.5%
Aqueous polyurethane is with thickening material 1%～2.5%
Deionized water 35%～65%.
3. extinction type waterborne polyurethane for synthetic leather finish according to claim 1 is characterized in that this waterborne polyurethane coating agent comprises following component by weight percentage:
Water-latex type anionic polyurethane resin 30%～40%
Water-borne acrylic resin 5%～8%
Flatting silica 4%～8%
Wetting dispersing agent 1%～1.5%
Organic silicon hand feeling agent 1%～2%
Aqueous polyurethane is with thickening material 1%～2%
Deionized water 40%～65%.
4. according to claim 1 or 2 or 3 described extinction type waterborne polyurethane for synthetic leather finishs, it is characterized in that: this waterborne polyurethane coating agent also comprises 0.5%～2% flow agent, and flow agent is silicone based flow agent.
5. according to claim 1 or 2 or 3 described extinction type waterborne polyurethane for synthetic leather finishs, it is characterized in that: this waterborne polyurethane coating agent also comprises 0.1%～0.5% skimmer, and skimmer adopts the silicone skimmer.
6. according to claim 1 or 2 or 3 described extinction type waterborne polyurethane for synthetic leather finishs, it is characterized in that: this waterborne polyurethane coating agent solid content is between 15～35%, and viscosity is at 800～2000 mPa. s.
7. according to claim 1 or 2 or 3 described extinction type waterborne polyurethane for synthetic leather finishs; It is characterized in that: the solid content of water-latex type anionic polyurethane resin is 25%～60%; Fixed substance is selected one or more in aliphatic polyurethane resin, aromatic urethane resin, polyester urethane resin and the polyether(poly)urethane resin for use; As preferably, the solid content of described water-latex type anionic polyurethane resin is 30%～45%.
8. according to claim 1 or 2 or 3 described extinction type waterborne polyurethane for synthetic leather finishs, it is characterized in that: flatting silica is an aerosil class flatting silica, and wetting dispersing agent is selected polycarboxylate sodium's class dispersion agent for use.
9. according to claim 1 or 2 or 3 described extinction type waterborne polyurethane for synthetic leather finishs, it is characterized in that: the auxiliary agent of polyether-modified dimethyl silica alkanes is selected in the organic silicon hand feeling agent for use.
10. according to claim 1 or 2 or 3 described extinction type waterborne polyurethane for synthetic leather finishs, it is characterized in that: aqueous polyurethane is selected polyurethane associative thickener for use with thickening material.
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| CN2011104046227A CN102533079A (en) | 2011-12-08 | 2011-12-08 | Extinction-type water-based polyurethane finishing agent used for synthetic leather |
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Application publication date: 20120704 |