CN110358046A - A kind of heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property and preparation method thereof - Google Patents
A kind of heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property and preparation method thereof Download PDFInfo
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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
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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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
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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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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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
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
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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
- C09D175/06—Polyurethanes from polyesters
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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
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
Abstract
The invention discloses heatproof transfer coatings aqueous polyurethane emulsions of a kind of good film-forming property and preparation method thereof, its key points of the technical solution are that: the material composition including following components by weight percent: neopentyl glycol hexanedioic acid glycol 14%, diisocyanate (H12MDI) 10%, dihydromethyl propionic acid 1.4%, TMP 0.5%, CHDM 0.5%, BEPD 0.5%, acetone 18%, NMP 2%, DMEA 4.0%, stannous octoate 0.006%, ice pure water 45.894%, triethylamine 1.2%, the water that the ice pure water is 0~4 DEG C.By the present invention in that with the main bodys raw material such as oligomer polyol, diisocyanate, hydrophilic chain extender, crosslinking agent and amine chainextender, with the two-step method of prepolymer method, under the premise of not improving the cost of raw material, there is provided that a kind of metastatic is good, a kind of heatproof transfer coatings aqueous polyurethane emulsion of the good good film-forming property of temperature tolerance.
Description
[technical field]
The present invention relates to heatproof transfer coatings aqueous polyurethane emulsions of a kind of good film-forming property and preparation method thereof, belong to
Technical field of coatings.
[background technique]
It by one layer of solvent type transfer coatings of coating on PET, then aluminizes, is then transferred to by aqueous wet type compound adhesive
Come above paper, this was once the one huge reform of cigarette packet industry, because this aluminizes on PET more environmentally friendly than directly, was more held
It is degradable.But recent years, since the relevant regulation of Environmental Protection in China is more and more severeer, solvent type transfer coatings, due to
VOC emission amount is big, and smell is big, inflammable and explosive to be increasingly restricted.It is therefore desirable to the trend of Water-borne modification is more and more obvious, but
Solvent type transfer coatings are mainly replaced by two kinds of aqueous products currently on the market, it is a kind of using aqueous acrylic emulsion as company
The aqueous transfer coating of ramming material replaces solvent type transfer coatings, and another way is aqueous turn that aqueous polyurethane is link stuff
Coating is moved to replace solvent type transfer coatings.But aqueous transfer coating printing of the aqueous acrylic emulsion as link stuff
It is good, great thermotolerance, but fissility is bad；Aqueous polyurethane is that the aqueous transfer coating fissility of link stuff is good, and temperature tolerance is bad.
[summary of the invention]
The purpose of the present invention is expanded by using oligomer polyol, diisocyanate, hydrophilic chain extender, crosslinking agent and amine
The main bodys raw material such as chain agent provide a kind of metastatic under the premise of not improving the cost of raw material with the two-step method of prepolymer method
It is good, a kind of heatproof transfer coatings aqueous polyurethane emulsion of the good good film-forming property of temperature tolerance.
It is a further object of the present invention to provide a kind of systems of the heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property
Preparation Method.
A kind of heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property, the substance group including following components by weight percent
At:
Preferably, the oligomer polyol be polycarbonate glycol (PCDL), neopentyl glycol hexanedioic acid glycol (PNA),
Any one in polytetrahydrofuran ether glycol (PTMG).
Preferably, the diisocyanate is any one in H12MDI and IPDI.
Preferably, the hydrophilic chain extender is any one in dihydromethyl propionic acid (DMPA) and dihydroxy butyric acid.
Preferably, the crosslinking agent is three kinds of mixtures of trimethylolpropane, CHDM, BEPD.
Preferably, the catalyst is stannous octoate.
Preferably, the amine chainextender is that DMEA is dissolved in acquired solution in 3% ice pure water, and the ice pure water is 0~4
DEG C water.
Preferably, the neutralizer is triethylamine, any one in diamines.
A kind of preparation method of heatproof transfer coatings aqueous polyurethane emulsion, comprising the following steps:
1), under the protection of dry nitrogen, 6~14% 100~110 DEG C of oligomer polyol dehydrations are vacuumized 1 hour,
Cool to 50~60 DEG C；
2) 10~12% diisocyanate, is added, from exotherm to 85 DEG C ± 3, reacts 2 hours, cool to 52~
54℃；
3), by 12~16% hydrophilic chain extender, 1.5~3% crosslinking agent and 2~4% NMP, be added, infuse after mixing
Meaning temperature can not increase it is too fast, 70~75 DEG C react 1 hour；
4), 0.006~0.012% catalyst is added, 60~65 DEG C are reacted 2 hours；
5) 12~18% acetone is added while, cooling, cools to 30~35 DEG C or less；
6) prepolymer discharging, is rapidly joined into amine chainextender into dispersion bucket, high speed dispersion 1 minute；
7) neutralizer and ice pure water, are rapidly joined in 1 minute, high speed dispersion 20 minutes；
8) it, vacuumizes desolventizing 1 hour for 57~60 DEG C, obtains heatproof transfer coatings aqueous polyurethane emulsion.
The viscosity of gained heatproof transfer coatings aqueous polyurethane emulsion is 14 ± 2 seconds/25 DEG C.
The present invention compared with the existing technology, has the advantage that
1, the heatproof transfer coatings aqueous polyurethane emulsion of a kind of good film-forming property of the invention, it is polynary using oligomer
Alcohol, diisocyanate, hydrophilic chain extender, crosslinking agent and amine chainextender prepare prepolymer with the two-step method of prepolymer method, quickly
Stirring and emulsifying vacuumizes desolventizing, by control reaction temperature, the density number of crosslinking, the degree of chain extension, generate molecular weight compared with
Big aqueous polyurethane emulsion；
2, the heatproof transfer coatings aqueous polyurethane emulsion of a kind of good film-forming property of the invention, using suitable hydrophilic expansion
Chain agent and suitable ratio, have reached that aqueous polyurethane emulsion partial size is few, the good overall target of levelling, using suitable crosslinking agent
Combination and ratio reach suitable molecular weight, while so that product is achieved heat-resist, take into account the characteristics of being easily peeled off, and make
The heatproof transfer coatings aqueous polyurethane emulsion obtained, performance is very excellent, and film forming ability is easily removed, and heatproof can reach 160 DEG C,
The viscous flower phenomenon of no xanthochromia, is better than same kind of products at abroad；
3, the heatproof transfer coatings aqueous polyurethane emulsion preparation method of a kind of good film-forming property of the invention, synthesis technology
Simply, easily controllable, reproducible, lotion the partial size of reaction is suitable, the quality of production is good, heat-resist, technique synthesizing environment-friendly, peace
Entirely, smell is few,；
4, the heatproof transfer coatings aqueous polyurethane emulsion preparation method of a kind of good film-forming property of the invention, using pre-polymerization
The two-step method of body method prepares prepolymer, and the particle size range for overcoming conventional urethane lotion is big, and partial size is thick, storage stability is not
Good, the physical property of film forming matter is bad to wait many shortcomings.
[specific embodiment]
The invention will be further described combined with specific embodiments below:
Embodiment 1:
A kind of heatproof transfer coatings aqueous polyurethane emulsion, the component comprising following weight proportion:
The preparation method of the heatproof transfer coatings aqueous polyurethane emulsion of embodiment 1, comprising the following steps:
1), under the protection of dry nitrogen, 110 DEG C of polycarbonate glycol (PCDL) dehydrations are vacuumized 1 hour, cool to 60
℃；
2) H12MDI, is added, from exotherm to 88 DEG C, reacts 2 hours, cools to 54 DEG C；
3) it, by dihydromethyl propionic acid (DMPA), is added after being mixed with the crosslinking agent of TMP, CHDM and BEPD and NMP, temperature
Can not increase it is too fast, 75 DEG C react 1 hour；
4), catalyst is added, 65 DEG C are reacted 2 hours；
5) acetone is added while, cooling, cools to 35 DEG C；
6) prepolymer discharging, is rapidly joined into DMEA into dispersion bucket, high speed dispersion 1 minute；
7) triethylamine and ice pure water, are rapidly joined in 1 minute, high speed dispersion 20 minutes；
8) it, vacuumizes desolventizing 1 hour for 60 DEG C, obtains heatproof transfer coatings aqueous polyurethane emulsion.
Embodiment 2:
A kind of heatproof transfer coatings aqueous polyurethane emulsion, the component comprising following weight proportion:
The preparation method of the heatproof transfer coatings aqueous polyurethane emulsion of embodiment 2, comprising the following steps:
1) under the protection of dry nitrogen, by polycarbonate glycol (PCDL), 105 DEG C of dehydrations are vacuumized 1 hour, cool to 55
℃；
2) H12MDI, is added, from exotherm to 86 DEG C, reacts 2 hours, cools to 53 DEG C；
3) it, by dihydromethyl propionic acid (DMPA), is added after being mixed with the crosslinking agent of TMP, CHDM and BEPD and NMP, temperature
Can not increase it is too fast, 72 DEG C react 1 hour；
4), catalyst is added, 63 DEG C react 2 hours,
5) acetone is added while, cooling, cools to 33 DEG C；
6) prepolymer discharging, is rapidly joined into DMEA aqueous solution into dispersion bucket, high speed dispersion 1 minute；
7) triethylamine and ice pure water, are rapidly joined in 1 minute, high speed dispersion 20 minutes；
8) it, vacuumizes desolventizing 1 hour for 58 DEG C, obtains heatproof transfer coatings aqueous polyurethane emulsion.
Embodiment 3:
A kind of heatproof transfer coatings aqueous polyurethane emulsion, the component comprising following weight proportion:
The preparation method of the heatproof transfer coatings aqueous polyurethane emulsion of embodiment 3, comprising the following steps:
1), under the protection of dry nitrogen, by neopentyl glycol hexanedioic acid glycol (PNA), 108 DEG C of dehydrations are vacuumized 1 hour, drop
Temperature is to 55 DEG C；
2) H12MDI, is added, from exotherm to 85 DEG C, reacts 2 hours, cools to 52 DEG C；
3) it, by dihydromethyl propionic acid (DMPA), is added after being mixed with the crosslinking agent of TMP, CHDM and BEPD and NMP, temperature
Can not increase it is too fast, 72 DEG C react 1 hour；
4), catalyst is added, 62 DEG C are reacted 2 hours；
5) acetone is added while, cooling, cools to 32 DEG C；
6) prepolymer discharging, is rapidly joined into DMEA aqueous solution into dispersion bucket, high speed dispersion 1 minute；
7) triethylamine and ice pure water, are rapidly joined in 1 minute, high speed dispersion 20 minutes；
8) it, vacuumizes desolventizing 1 hour for 58 DEG C, obtains heatproof transfer coatings aqueous polyurethane emulsion.
Embodiment 4:
A kind of heatproof transfer coatings aqueous polyurethane emulsion, the component comprising following weight proportion:
The preparation method of the heatproof transfer coatings aqueous polyurethane emulsion of embodiment 4, comprising the following steps:
1), under the protection of dry nitrogen, by neopentyl glycol hexanedioic acid glycol (PNA), 103 DEG C of dehydrations are vacuumized 1 hour, drop
Temperature is to 52 DEG C；
2) IPDI, is added, from exotherm to 84 DEG C, reacts 2 hours, cools to 53 DEG C；
3) it, by dihydromethyl propionic acid (DMPA), is added after being mixed with the crosslinking agent of TMP1, CHDM and BEPD and NMP, temperature
Can not increase it is too fast, 71 DEG C react 1 hour；
4), catalyst is added again, 62 DEG C are reacted 2 hours；
5) acetone is added while, cooling, cools to 31 DEG C；
6), prepolymer discharging rapidly joins DMEA aqueous solution into dispersion bucket, and high speed dispersion 1 minute；
7) triethylamine and ice pure water, 20 minutes of high speed dispersion, are rapidly joined in 1 minute
8) it, vacuumizes desolventizing 1 hour for 59 DEG C, obtains heatproof transfer coatings aqueous polyurethane emulsion.
Embodiment 5:
A kind of heatproof transfer coatings aqueous polyurethane emulsion, the component comprising following weight proportion:
The preparation method of the heatproof transfer coatings aqueous polyurethane emulsion of embodiment 5, comprising the following steps:
1), under the protection of dry nitrogen, by polytetrahydrofuran ether glycol (PTMG), 100 DEG C of dehydrations are vacuumized 1 hour, drop
Temperature is to 50 DEG C；
2) H12MDI, is added, from exotherm to 83 DEG C, reacts 2 hours, cools to 52 DEG C；
3) it, by dimethylolpropionic acid, is added after being mixed with the crosslinking agent of TMP, CHDM and BEPD and NMP, pays attention to temperature not
Can increase it is too fast, 70 DEG C react 1 hour；
4), catalyst is added, 60 DEG C are reacted 2 hours；
5) acetone is added while, cooling, cools to 30 DEG C；
6) prepolymer discharging, is rapidly joined into DMEA aqueous solution into dispersion bucket, high speed dispersion 1 minute；
7) diamines and ice pure water, are rapidly joined in 1 minute, high speed dispersion 20 minutes；
8) it, vacuumizes desolventizing 1 hour for 57 DEG C, obtains heatproof transfer coatings aqueous polyurethane emulsion.
Performance test such as table 1 after the heatproof transfer coatings of Examples 1 to 5 aqueous polyurethane emulsion film-forming:
1, water-based temperature resistant transfer coatings manufacturing process: 70 parts of heatproof transfer coatings aqueous polyurethane emulsion is taken respectively, is added
Enter in the glass that volume is 150ml, then adds 27 parts of distilled water, 1 part of coalescing agent, 1 part of anti-wear agent, 0.6
0.2 part of aqueous levelling agent (organic silicon modified by polyether), 0.2 part of aqueous defoamer, with 350~550 is added in the wetting agent of part
Rev/min revolving speed stirs 15~30 minutes, until system is uniform, with the filter screen filtration of 250 mesh, filtrate is inverted in black glue
In tank, for use.
2, film-forming process: using 2# scraper, water-based temperature resistant transfer coatings scratched respectively on the front of PET film,
Number is 1,2,3,4,5, sets 105 DEG C for oven temperature, and humidity 10% places 1,2,3,4,5 films 3 hours respectively,
Film-forming.
Table 1:
By testing resulting result above:
1) heatproof transfer coatings aqueous polyurethane emulsion of the invention, good leveling property, removing are easy, and heatproof is high.
2) heatproof transfer coatings aqueous polyurethane emulsion of the invention is aqueous dispersion, to human body and the equal nothing of environment
Adverse effect meets the environmental protection standard requirement of country and industry.
Claims (4)
1. a kind of heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property, it is characterised in that including following components by weight percent
Material composition:
The water that the ice pure water is 0~4 DEG C.
2. a kind of heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property according to claim 1, feature exist
In: the amine chainextender is that DMEA is dissolved in acquired solution in 3% ice pure water.
3. a kind of preparation method of the heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property, it is characterised in that including following
Step:
1), under the protection of dry nitrogen, 6~14% 100~110 DEG C of oligomer polyol dehydrations are vacuumized 1 hour, are cooled down
To 50~60 DEG C；
2) 10~12% diisocyanate, is added, from exotherm to 85 DEG C ± 3, reacts 2 hours, cools to 52~54 DEG C；
3), by 12~16% hydrophilic chain extender, 1.5~3% crosslinking agent and 2~4% NMP, be added after mixing, pay attention to temperature
Degree can not increase it is too fast, 70~75 DEG C react 1 hour；
4), 0.006~0.012% catalyst is added, 60~65 DEG C are reacted 2 hours；
5) 12~18% acetone is added while, cooling, cools to 30~35 DEG C or less；
6) prepolymer discharging, is rapidly joined into amine chainextender into dispersion bucket, high speed dispersion 1 minute；
7) neutralizer and ice pure water, are rapidly joined in 1 minute, high speed dispersion 20 minutes；
8) it, vacuumizes desolventizing 1 hour for 57~60 DEG C, obtains heatproof transfer coatings aqueous polyurethane emulsion.
4. a kind of preparation side of the heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property according to claim 1
Method, it is characterised in that: the viscosity of gained heatproof transfer coatings aqueous polyurethane emulsion is 14 ± 2 seconds/25 DEG C.
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| CN201710077579.5A CN106589310B (en) | 2017-02-14 | 2017-02-14 | A kind of heatproof transfer coatings aqueous polyurethane emulsion and preparation method thereof |
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| CN201910677749.2A Withdrawn CN110358046A (en) | 2017-02-14 | 2017-02-14 | A kind of heatproof transfer coatings aqueous polyurethane emulsion of good film-forming property and preparation method thereof |
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| CN111234282A (en) * | 2020-01-14 | 2020-06-05 | 桂柳春 | Aluminum-free high-brightness transfer film and preparation method thereof |
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Also Published As
| Publication number | Publication date |
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| CN110358048A (en) | 2019-10-22 |
| CN110358048B (en) | 2021-08-10 |
| CN106589310B (en) | 2019-09-06 |
| CN110358047A (en) | 2019-10-22 |
| CN110358047B (en) | 2021-08-10 |
| CN106589310A (en) | 2017-04-26 |
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