CN106118428A - A kind of waterproof scratch resistant aqueous polyurethane coating and preparation method thereof - Google Patents
A kind of waterproof scratch resistant aqueous polyurethane coating and preparation method thereof Download PDFInfo
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- CN106118428A CN106118428A CN201610605818.5A CN201610605818A CN106118428A CN 106118428 A CN106118428 A CN 106118428A CN 201610605818 A CN201610605818 A CN 201610605818A CN 106118428 A CN106118428 A CN 106118428A
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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
- C09D175/08—Polyurethanes from polyethers
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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
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
- C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
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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
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
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- 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
- C08G18/61—Polysiloxanes
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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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6648—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6651—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6659—Compounds of group C08G18/42 with compounds of group C08G18/34
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- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- 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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
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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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/6692—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/34
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- 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
- C09D175/06—Polyurethanes from polyesters
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Abstract
The invention discloses a kind of waterproof scratch resistant aqueous polyurethane coating and preparation method thereof；Described coating includes each component of following parts by weight: polyisocyanates 5～12 parts, polyethers or PEPA 5～12 parts, organosilicon polyhydric alcohol 1～4 parts, solvent 8～14 parts, hydrophilic chain extender 1～3 parts, small molecule chain extender 1～3 parts, nertralizer 1～3 parts, water 50～70 parts.The present invention, by the reaction of organosilicon polyhydric alcohol with polyisocyanates, introduces organosilicon composition in polyaminoester emulsion, thus significantly improves the resistance to water of coating, slipping；Compared with general water paint, make coating film forming rear surface to reduce by the introducing of organosilicon polyhydric alcohol, impart its good solvent resistance；Compared with addition type organosilicon auxiliary agent, organosilicon polyhydric alcohol, with isocyanates reactive grafting to strand, gives the higher storage stability of coating.
Description
Technical field
The present invention relates to transfer coatings technical field, be specifically related to a kind of waterproof scratch resistant aqueous polyurethane coating and system thereof
Preparation Method.
Background technology
China's tobacco bale printing technology is high to technological requirement, considerably beyond European and American developed countries.Tobacco and wine in early days, food
The gold silver paperboard of the packing box such as product, article of everyday use mainly uses composite algorithm technique to produce, will aluminium foil or aluminizer straight with paper
Connect compound.The aluminium foil and the plastic sheeting that use in product cannot recycle, and cause the wasting of resources and environmental pollution.In order to protect
Environment is cost-effective, the straight plating method technique of existing many employings and transfer method technique.Compared with straight plating method technique, the advantage of transfer method technique
It is: paper is required low, the Paper or cardboard of any thickness can be used；The flatness that can make full use of thin film makes paper metallic luster
Brighter.Play a crucial role in transfer method technique is transfer coatings.It can give following effect: with being easily peeled of thin film
Property, with the adhesive force of aluminium lamination, print line, glossiness etc..The aqueous polyurethane coating existence two big subject matters of tobacco bale transfer at present:
Due to the aqueous transfer coating easy moisture absorption, poor water resistance for solvent-borne type；The membrane formation mechanism of water paint is with solvent-borne type not
With, and the molecular weight difference comprising polymer in the two is relatively big, causes water paint to wear no resistance, easy scratch.
By the retrieval of existing patent documentation is found, the Chinese invention patent application of Application No. 201010597225.1
Disclosing the preparation method of a kind of organic silicon modified aqueous polyurethane, it uses different performed polymer, is gathered by physical modification
Urethane performed polymer, then make organic silicon modified polyurethane copolymer with polysiloxanes addition polymerization, chain extending reaction.But, although
This patent uses the method for modifying that is polymerized with polyurethane of polysiloxanes can improve the resistance to water of coating, and with the side of physical blending
Method compares the compatibility that can suitably improve organosilicon siloxanes and polyurethane.But even with the method for addition polymerization,
Polysiloxanes (PMDS) is limited with the compatibility of polyurethane, and using of a large amount of polysiloxanes can be to the levelling of coating, printing opacity
Rate produces the most serious impact.
Summary of the invention
For above-mentioned defect of the prior art, it is an object of the invention to provide a kind of waterproof scratch resistant aqueous polyurethane
Coating and preparation method thereof.
It is an object of the invention to be achieved through the following technical solutions:
The present invention relates to a kind of waterproof scratch resistant aqueous polyurethane coating, described coating includes each group of following parts by weight
Point:
Preferably, described polyisocyanates includes methyl diphenylene diisocyanate, toluene di-isocyanate(TDI), dicyclohexyl
One or more in methane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate.
Preferably, described PEPA is one or more that degree of functionality is more than or equal in the PEPA of 2, described
(number is all) molecular weight of PEPA is 2000～4000；Described polyether polyol be degree of functionality be more than or equal to 2 polyethers many
One or more in unit's alcohol, (number is all) molecular weight of described polyether polyol is 2000～4000.
Preferably, described organosilicon polyhydric alcohol is end hydroxyalkyl groups polysiloxanes organo-silicon compound, end hydroxy polyether
One or more in modified polyorganosiloxane organo-silicon compound.
Preferably, during described solvent includes acetone, butanone, N-Methyl pyrrolidone, N-ethyl pyrrolidone, ethyl acetate
One or more.
Preferably, described hydrophilic chain extender includes dihydromethyl propionic acid, dimethylolpropionic acid, diaminobenzoic acid, second two
One or more in amido ethyl sulfonic acid sodium, 1,4-butanediol-2-sodium sulfonate, N methyldiethanol amine.
Preferably, described small molecule chain extender include ethylene glycol, propylene glycol, butanediol, neopentyl glycol, hexanediol, 4,4'-
One or more in diaminourea-3,3'-dichloro diphenyl methane.
Preferably, described nertralizer includes triethylamine, diethanolamine, triethanolamine, N-dimethylethanolamine, N, N-bis-
One or more in the different monooctyl ester of methylamino para Toluic Acid.
The invention still further relates to the preparation method of a kind of above-mentioned waterproof scratch resistant aqueous polyurethane coating, the method includes as follows
Step:
(1) by described polyethers or PEPA, organosilicon polyhydric alcohol input reactor, at 120 DEG C, under vacuum condition
Stirring dehydration, until after polyethers or PEPA are less than 200ppm with the water content in the mixture of organosilicon polyhydric alcohol, fall
Temperature is to 85 DEG C；
(2) it is kept stirring for and polyisocyanates is put in reactor, stirring 1～2 hour；
(3) it is kept stirring for and disperses to put in reactor the most afterwards by hydrophilic chain extender and small molecule chain extender, stirring
Mix 1～2 hour；
(4) add nertralizer after being cooled to less than 50 DEG C, stir 0.5 hour；
(5) product is poured in dispersion cylinder, use high speed dispersor to add water-dispersible emulsifying 0.5 hour；
(6) by the emulsion of preparation at 50 DEG C, under vacuum condition, solvent is sloughed.
Compared with prior art, there is advantages that
(1) by the reaction of organosilicon polyhydric alcohol with polyisocyanates, polyaminoester emulsion introduces organosilicon composition, from
And significantly improve the resistance to water of coating, slipping；
(2) with water as main dispersing medium, being substantially free of organic solvent, volatile organic matter (VOCs) content is extremely low, raw
Produce low cost；
(3) compared with general water paint, the introducing of organosilicon polyhydric alcohol makes coating film forming rear surface to reduce, and imparts
Its good solvent resistance, is more suitable for solvent resistance is required higher mode of printing (such as intaglio printing, silk screen printing)；
(4) compared with addition type organosilicon auxiliary agent, organosilicon polyhydric alcohol, with isocyanates reactive grafting to strand, is composed
Give the higher storage stability of coating；
(5) the transfer coatings system of the present invention employs end hydroxyalkyl groups polysiloxanes organo-silicon compound, end hydroxyl
Base Siloxane-Oxyalkylene Copolymers organo-silicon compound, it has the good compatibility with polyurethane, it is possible to significantly improve coating
Water-fast, scraping and wiping resistance performance, and levelling, light transmittance will not be produced significantly negative effect.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.Following example will assist in those skilled in the art
It is further appreciated by the present invention, but limits the present invention the most in any form.It should be pointed out that, to those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make certain adjustments and improvements.These broadly fall into the guarantor of the present invention
Protect scope.
The terminal hydroxy group modified polyorganosiloxane that following example relate to is to replace terminal hydroxy group dimethyl with a part of organic group
Methyl in siloxanes, modified main purpose is to improve the effect of auxiliary agent, and the compatibility increases reactivity etc..Its molecular formula is:
Wherein, R=alkane, polyethers etc., m=10～
30, n=1～10.
Embodiment 1
The present embodiment relates to a kind of waterproof scratch resistant aqueous polyurethane coating, including each component of following parts by weight: many
Isocyanates 10 parts, polyethers or PEPA 10 parts, organosilicon polyhydric alcohol 1 part, solvent 12 parts, hydrophilic chain extender 3 parts, little point
Sub-chain extender 2 parts, nertralizer 2 parts, 60 parts of water.
As a example by preparation 100kg waterproof scratch resistant aqueous polyurethane coating, the preparation method of the coating of the present embodiment is concrete
Comprise the steps:
(1) by 10kg PEPA, (degree of functionality hydroxy-terminated polyester polyhydric alcohol more than or equal to 2, molecular weight is 2000
～2500), 1kg organosilicon polyhydric alcohol (end hydroxyalkyl groups polysiloxanes organo-silicon compound), at 120 DEG C, stirs under vacuum condition
Mix dehydration 0.5 hour, until the water content in PEPA and organosilicon polyhydric alcohol is cooled to 85 DEG C less than after 200ppm；
(2) it is kept stirring for and 10kg methyl diphenylene diisocyanate is put in reactor, stirring 2 hours；
(3) reactor is put into after being kept stirring for and 3kg dihydromethyl propionic acid and 2kg butanediol are dispersed in 12kg acetone
In, stir 2 hours；
(4) add 2kg triethanolamine after being cooled to less than 50 DEG C, stir 0.5 hour；
(5) product is poured in dispersion cylinder, use high speed dispersor to add the water-dispersible emulsifying of 60kg 0.5 hour；
(6) by the emulsion of preparation at 50 DEG C, slough solvent under vacuum condition, obtain described waterproof scratch resistant aqueous polyurethane
Coating.
The performance of the waterproof scratch resistant aqueous polyurethane coating that the present embodiment prepares is as shown in table 3.
In the coating system of the present embodiment, examination polysiloxanes, modified polyorganosiloxane and Different adding amount are to light transmittance
Impact；Light transmittance is tested: using thin film light transmittance mist degree tester, basement membrane is PET film, and coatings dry measure is 1.2g/m2。
Result is as shown in table 1:
Table 1
* PET basement membrane light transmittance is 90%.
In the coating system of the present embodiment, examination polysiloxanes, modified polyorganosiloxane and Different adding amount are to levelling
Impact；Levelling is tested, and uses JB 3,998 85 standard.Its result is as shown in table 2:
Table 2
Embodiment 2
The present embodiment relates to a kind of waterproof scratch resistant aqueous polyurethane coating, including each component of following parts by weight: many
Isocyanates 12 parts, polyethers or PEPA 10 parts, organosilicon polyhydric alcohol 2 parts, solvent 10 parts, hydrophilic chain extender 3 parts, little point
Sub-chain extender 3 parts, nertralizer 2 parts, 58 parts of water.
As a example by preparation 100kg waterproof scratch resistant aqueous polyurethane coating, the preparation method of the coating of the present embodiment is concrete
Comprise the steps:
(1) by 10kg PEPA (degree of functionality more than 2 hydroxy-terminated polyester polyhydric alcohol, molecular weight be 3500～
4000), 2kg organosilicon polyhydric alcohol (end hydroxy polyether modified polyorganosiloxane organo-silicon compound), at 120 DEG C, stirs under vacuum condition
Mix dehydration 0.5 hour, until the water content in PEPA and organosilicon polyhydric alcohol is cooled to 85 DEG C less than after 200ppm；
(2) it is kept stirring for and 12kg isophorone diisocyanate is put in reactor, stirring 2 hours；
(3) it is kept stirring for and by 3kg ethylenediamine base ethyl sulfonic acid sodium and 3kg 4,4'-diaminourea-3,3'-dichloro diphenyl methane
Put in reactor after being dispersed in the mixed solvent of 6kg N-crassitude and 4kg ethyl acetate, stir 2 hours；
(4) add 2kg N, the different monooctyl ester of N dimethylamine base para Toluic Acid after being cooled to less than 50 DEG C, stir 0.5 hour；
(5) product is poured in dispersion cylinder, use high speed dispersor to add the water-dispersible emulsifying of 58kg 0.5 hour；
(6) by the emulsion of preparation at 50 DEG C, slough solvent under vacuum condition, obtain described waterproof scratch resistant aqueous polyurethane
Coating.
The performance of the waterproof scratch resistant aqueous polyurethane coating that the present embodiment prepares is as shown in table 3.
Embodiment 3
The present embodiment relates to a kind of waterproof scratch resistant aqueous polyurethane coating, including each component of following parts by weight: many
Isocyanates 8 parts, polyethers or PEPA 12 parts, organosilicon polyhydric alcohol 3 parts, solvent 10 parts, hydrophilic chain extender 3 parts, little point
Sub-chain extender 2 parts, nertralizer 2 parts, 60 parts of water.
As a example by preparation 100kg waterproof scratch resistant aqueous polyurethane coating, the preparation method of the coating of the present embodiment is concrete
Comprise the steps:
(1) by 12kg polyether polyol (degree of functionality be 3 hydroxy-end capped polyoxyalkylene polyol, molecular weight be 3000～
3500), 3kg organosilicon polyhydric alcohol (end hydroxyalkyl groups polysiloxanes organo-silicon compound), at 120 DEG C, stirs under vacuum condition
It is dehydrated 0.5 hour, until the water content in polyether polyol and organosilicon polyhydric alcohol is cooled to 85 DEG C less than after 200ppm；
(2) it is kept stirring for and 6kg dicyclohexyl methyl hydride diisocyanate and 2kg hexamethylene diisocyanate are put into anti-
Answer in still, stir 2 hours；
(3) it is kept stirring for and 3kgN-methyl diethanolamine and 2kg neopentyl glycol are dispersed in 10kg N-ethyl pyrrolidine
Put in reactor after in ketone, stir 2 hours；
(4) add 2kg N-dimethylethanolamine after being cooled to less than 50 DEG C, stir 0.5 hour；
(5) product is poured in dispersion cylinder, use high speed dispersor to add the water-dispersible emulsifying of 60kg 0.5 hour；
(6) by the emulsion of preparation at 50 DEG C, slough solvent under vacuum condition, obtain described waterproof scratch resistant aqueous polyurethane
Coating.
The performance of the waterproof scratch resistant aqueous polyurethane coating that the present embodiment prepares is as shown in table 3.
Embodiment 4
The present embodiment relates to a kind of waterproof scratch resistant aqueous polyurethane coating, including each component of following parts by weight: many
Isocyanates 5 parts, polyethers or PEPA 5 parts, organosilicon polyhydric alcohol 1 part, solvent 8 parts, hydrophilic chain extender 1 part, little molecule
Chain extender 1 part, nertralizer 1 part, 50 parts of water.
As a example by preparation 72kg waterproof scratch resistant aqueous polyurethane coating, the preparation method of the coating of the present embodiment is specifically wrapped
Include following steps:
(1) by 5kg polyether polyol (degree of functionality be 4 hydroxy-end capped polyoxyalkylene polyol, molecular weight be 2500～
3000), 1kg organosilicon polyhydric alcohol (end hydroxyalkyl groups polysiloxanes organo-silicon compound), at 120 DEG C, stirs under vacuum condition
It is dehydrated 0.5 hour, until the water content in polyether polyol and organosilicon polyhydric alcohol is cooled to 85 DEG C less than after 200ppm；
(2) it is kept stirring for and 5kg toluene di-isocyanate(TDI) is put in reactor, stirring 2 hours；
(3) reactor is put into after being kept stirring for and 1kg dimethylolpropionic acid and 1kg propylene glycol are dispersed in 8kg butanone
In, stir 2 hours；
(4) add 1kg diethanolamine after being cooled to less than 50 DEG C, stir 0.5 hour；
(5) product is poured in dispersion cylinder, use high speed dispersor to add the water-dispersible emulsifying of 50kg 0.5 hour；
(6) by the emulsion of preparation at 50 DEG C, slough solvent under vacuum condition, obtain described waterproof scratch resistant aqueous polyurethane
Coating.
The performance of the waterproof scratch resistant aqueous polyurethane coating that the present embodiment prepares is as shown in table 3.
Embodiment 5
The present embodiment relates to a kind of waterproof scratch resistant aqueous polyurethane coating, including each component of following parts by weight: many
Isocyanates 12 parts, polyethers or PEPA 12 parts, organosilicon polyhydric alcohol 4 parts, solvent 14 parts, hydrophilic chain extender 2 parts, little point
Sub-chain extender 2 parts, nertralizer 3 parts, 70 parts of water.
As a example by preparation 119kg waterproof scratch resistant aqueous polyurethane coating, the preparation method of the coating of the present embodiment is concrete
Comprise the steps:
(1) by 12kg polyether polyol (degree of functionality be 2 hydroxy-end capped polyoxyalkylene polyol, molecular weight be 2600～
2900), 4kg organosilicon polyhydric alcohol (end hydroxyalkyl groups polysiloxanes organo-silicon compound), at 120 DEG C, stirs under vacuum condition
It is dehydrated 0.5 hour, until the water content in polyether polyol and organosilicon polyhydric alcohol is cooled to 85 DEG C less than after 200ppm；
(2) it is kept stirring for and 6kg toluene di-isocyanate(TDI) and 6kg hexamethylene diisocyanate is put in reactor,
Stir 2 hours；
(3) it is kept stirring for and 2kg1,4-butanediol-2-sodium sulfonate and 2kg ethylene glycol are dispersed in 14kg N-N-ethyl pyrrole N-
Put in reactor after in alkanone, stir 2 hours；
(4) add 3kg triethylamine after being cooled to less than 50 DEG C, stir 0.5 hour；
(5) product is poured in dispersion cylinder, use high speed dispersor to add the water-dispersible emulsifying of 70kg 0.5 hour；
(6) by the emulsion of preparation at 50 DEG C, slough solvent under vacuum condition, obtain described waterproof scratch resistant aqueous polyurethane
Coating.
The performance of the waterproof scratch resistant aqueous polyurethane coating that the present embodiment prepares is as shown in table 3.
Table 3
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformation or amendment within the scope of the claims, this not shadow
Ring the flesh and blood of the present invention.
Claims (9)
1. a waterproof scratch resistant aqueous polyurethane coating, it is characterised in that described coating includes each group of following parts by weight
Point:
Waterproof scratch resistant aqueous polyurethane coating the most according to claim 1, it is characterised in that described polyisocyanates bag
Include methyl diphenylene diisocyanate, toluene di-isocyanate(TDI), dicyclohexyl methyl hydride diisocyanate, isophorone diisocyanate
One or more in ester, hexamethylene diisocyanate.
Waterproof scratch resistant aqueous polyurethane coating the most according to claim 1, it is characterised in that described PEPA is
Degree of functionality is more than or equal to one or more in the PEPA of 2, and the molecular weight of described PEPA is 2000～4000；
Described polyether polyol is one or more that degree of functionality is more than or equal in the polyether polyol of 2, dividing of described polyether polyol
Son amount is 2000～4000.
Waterproof scratch resistant aqueous polyurethane coating the most according to claim 1, it is characterised in that described organosilicon polyhydric alcohol
For the one in end hydroxyalkyl groups polysiloxanes organo-silicon compound, end hydroxy polyether modified polyorganosiloxane organo-silicon compound
Or it is several.
Waterproof scratch resistant aqueous polyurethane coating the most according to claim 1, it is characterised in that described solvent includes third
One or more in ketone, butanone, N-Methyl pyrrolidone, N-ethyl pyrrolidone, ethyl acetate.
Waterproof scratch resistant aqueous polyurethane coating the most according to claim 1, it is characterised in that described hydrophilic chain extender bag
Include dihydromethyl propionic acid, dimethylolpropionic acid, diaminobenzoic acid, ethylenediamine base ethyl sulfonic acid sodium, 1,4-butanediol-2-sulfonic acid
One or more in sodium, N methyldiethanol amine.
Waterproof scratch resistant aqueous polyurethane coating the most according to claim 1, it is characterised in that described small molecule chain extender
Including in ethylene glycol, propylene glycol, butanediol, neopentyl glycol, hexanediol, 4,4'-diaminourea-3,3'-dichloro diphenyl methane
Plant or several.
Waterproof scratch resistant aqueous polyurethane coating the most according to claim 1, it is characterised in that described nertralizer includes three
Ethamine, diethanolamine, triethanolamine, N-dimethylethanolamine, N, one in the different monooctyl ester of N dimethylamine base para Toluic Acid or
Several.
9. according to a preparation method for the waterproof scratch resistant aqueous polyurethane coating according to any one of claim 1～8, its
Being characterised by, described method comprises the steps:
S1, described polyethers or PEPA, organosilicon polyhydric alcohol are put in reaction vessel, at 110～130 DEG C, vacuum bar
Stirring dehydration under part, until after polyethers or PEPA are less than 200ppm with water content in the mixture of organosilicon polyhydric alcohol,
It is cooled to 80～90 DEG C；
S2, it is kept stirring for and described polyisocyanates is put in reaction vessel, stirring 1～2 hour；
S3, it is kept stirring for and disperses described hydrophilic chain extender and small molecule chain extender to put in reaction vessel the most afterwards,
Stir 1～2 hour；
S4, it is cooled to after less than 50 DEG C add described nertralizers, stirs 0.4～0.6 hour；
S5, in the stirring product of step S4, add water-dispersible emulsifying 0.4～0.6 hour；
S6, emulsion step S5 prepared, at 45～55 DEG C, slough solvent under vacuum condition, obtain described waterproof scratch resistant aqueous
Polyurethane coating.
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| CN109160994A (en) * | 2018-08-02 | 2019-01-08 | 万华化学集团股份有限公司 | One kind is for dry coating primer aqueous polyurethane dispersion and its preparation method and application |
| CN110358047A (en) * | 2017-02-14 | 2019-10-22 | 广东博海化工科技有限公司 | A kind of environment-friendly type heatproof transfer coatings aqueous polyurethane coating and preparation method thereof |
| CN110452352A (en) * | 2019-08-23 | 2019-11-15 | 三晃树脂（佛山）有限公司 | A kind of waterborne polyurethane resin and preparation method thereof |
| CN110669196A (en) * | 2019-08-14 | 2020-01-10 | 合肥科天水性科技有限责任公司 | Waterborne polyurethane and method for preparing transfer agent by using same and application of waterborne polyurethane |
| WO2021077448A1 (en) * | 2019-10-22 | 2021-04-29 | 江苏中路工程技术研究院有限公司 | New and old pavement base course joining interface treatment material and preparation method therefor |
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| CN106590399A (en) * | 2016-12-30 | 2017-04-26 | 康伦国 | Graphene-organosilicone modified polyurethane water-based paint |
| CN110358047A (en) * | 2017-02-14 | 2019-10-22 | 广东博海化工科技有限公司 | A kind of environment-friendly type heatproof transfer coatings aqueous polyurethane coating and preparation method thereof |
| CN108840987A (en) * | 2018-06-28 | 2018-11-20 | 优美特（北京）环境材料科技股份公司 | The polyalcohol modified aqueous polyurethane emulsion of organosilicon and preparation method |
| CN109160994B (en) * | 2018-08-02 | 2021-01-15 | 万华化学集团股份有限公司 | Polyurethane dispersion for dry coating primer, and preparation method and application thereof |
| CN109160994A (en) * | 2018-08-02 | 2019-01-08 | 万华化学集团股份有限公司 | One kind is for dry coating primer aqueous polyurethane dispersion and its preparation method and application |
| CN110669196A (en) * | 2019-08-14 | 2020-01-10 | 合肥科天水性科技有限责任公司 | Waterborne polyurethane and method for preparing transfer agent by using same and application of waterborne polyurethane |
| CN110452352A (en) * | 2019-08-23 | 2019-11-15 | 三晃树脂（佛山）有限公司 | A kind of waterborne polyurethane resin and preparation method thereof |
| CN110452352B (en) * | 2019-08-23 | 2021-08-13 | 三晃树脂（佛山）有限公司 | Waterborne polyurethane resin and preparation method thereof |
| WO2021077448A1 (en) * | 2019-10-22 | 2021-04-29 | 江苏中路工程技术研究院有限公司 | New and old pavement base course joining interface treatment material and preparation method therefor |
| CN113088176A (en) * | 2021-04-01 | 2021-07-09 | 南阳金牛彩印集团有限公司 | Self-repairing scratch-resistant polyurethane coating and preparation method thereof |
| CN114230755A (en) * | 2021-12-22 | 2022-03-25 | 广州富思德化工科技有限公司 | High-solid-content strong-adhesion waterborne polyurethane emulsion and preparation method thereof |
| CN114958171A (en) * | 2022-06-08 | 2022-08-30 | 刘小群 | Preparation method of polyborosiloxane modified polyurethane water-based paint |
| CN115368818A (en) * | 2022-08-26 | 2022-11-22 | 苏州鑫新海运有限公司 | Waterproof impervious coating composition and application thereof |
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