CN104193952A - Colorized polyurethane emulsion for water-proof coating and preparation method of colorized polyurethane emulsion - Google Patents
Colorized polyurethane emulsion for water-proof coating and preparation method of colorized polyurethane emulsion Download PDFInfo
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- CN104193952A CN104193952A CN201410397842.5A CN201410397842A CN104193952A CN 104193952 A CN104193952 A CN 104193952A CN 201410397842 A CN201410397842 A CN 201410397842A CN 104193952 A CN104193952 A CN 104193952A
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- C08G18/30—Low-molecular-weight compounds
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Abstract
The invention discloses a colorized polyurethane emulsion for a water-proof coating. The colorized polyurethane emulsion is characterized by comprising the following components in parts by mass: 10-20 parts of aromatic diisocyanate, 15-30 parts of polyglycol, 4-8 parts of chain extender, 1-5 parts of organic neutralizing agent and 100 parts of water, wherein the chain extender comprises the following components in parts by mass: 1-2 parts of hydrophilic chain extender, 2-4 parts of main chain extender and 1-2 parts of chain post-extender. The colorized polyurethane emulsion for the water-proof coating disclosed by the invention has the advantages of excellent stability, mechanical properties and color development.
Description
Technical field
The present invention relates to a kind of polyaminoester emulsion and preparation method thereof, is a kind of colour polyurethane emulsion for waterproof paint and preparation method thereof specifically.
Background technology
Waterproof color coating is that the exterior wall that current buildings is conventional applies material, its effect is at building surface, to form dense film by chemical reaction, prevent that moisture is in the seepage of building surface, to reduce the water ratio of buildings, the heat-sinking capability of improving buildings plays pigmentation to skin simultaneously.Existing waterproof color coating generally adopts isocyanic ester, polyethers etc. to generate the performed polymer containing isocyanate group through polyaddition reaction, and under performed polymer state, add the mixture of aftertreatment material and pigment, after fully stirring, form the waterproof paint of single-component polyurethane colour.Yet, because the reactive behavior of base polyurethane prepolymer for use as is higher, when adding the mixture of aftertreatment material and pigment, the combination of pigment and performed polymer molecular chain is more difficult, greatly affected the color developing after pigment adds, made coating reproduction effect of color after use poor.In addition, pigment is difficult to be combined with performed polymer molecular chain, makes pigment group free in coating more, has a strong impact on the stability of pigment after use, makes the situations such as coating easily occurs afterwards variable color in use, fades, efflorescence, and pigment pollutes the environment after separating out.In addition, after existing base polyurethane prepolymer for use as has reacted, need to carry out secondary reaction with aftertreatment material, when pigment and aftertreatment mixing of materials, need multistep additional process, so the production technique more complicated of the waterproof paint of traditional single-component polyurethane colour.Therefore, how developing that a kind of stability is high, the simple color waterproof polyurethane paint of technique, is the technical barrier of current polyurethane coating industry faces.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of colour polyurethane emulsion for waterproof paint with good stability, mechanical property and color developing is provided.
Another goal of the invention of the present invention is to provide the method for the above-mentioned colour polyurethane emulsion for waterproof paint of the simple preparation of a kind of technique.
Goal of the invention of the present invention is achieved in that a kind of colour polyurethane emulsion for waterproof paint, it is characterized in that: the described colour polyurethane emulsion for waterproof paint comprises aromatic diisocyanate, poly-dihydric alcohol, chainextender, organic neutralizer and water, and said components content is respectively by mass fraction: water: 100 parts; Aromatic diisocyanate: 10-20 part; Poly-dihydric alcohol: 15-30 part; Chainextender: 4-8 part; Organic neutralizer: 1-5 part, described chainextender comprises hydrophilic chain extender, main chainextender and rear chainextender, the content of hydrophilic chain extender, main chainextender and rear chainextender is respectively by mass fraction: hydrophilic chain extender: 1-2 part; Main chainextender: 2-4 part; Rear chainextender: 1-2 part.
Described poly-dihydric alcohol is polypropylene glycol.
Described aromatic diisocyanate is tolylene diisocyanate.
Described hydrophilic chain extender is dimethylol propionic acid.
Described main chainextender is BDO.
Described rear chainextender is quadrol.
Described organic neutralizer is triethylamine.
The described colour polyurethane emulsion for waterproof paint comprises colour developing chainextender, and colour developing chainextender content is pressed massfraction and calculated as 1-2 part.
Described colour developing chainextender comprises a kind of in blue chainextender, red chainextender and yellow chainextender.
Described preparation method comprises the following steps:
A: take raw material for standby according to said ratio;
B: in being housed, the flask of agitator adds poly-dihydric alcohol, and standby after dewatering 1-3 hour under 100-120 ℃, vacuum environment;
C: the mixture of b step is cooled to 70-90 ℃, adds hydrophilic chain extender, and standby after dewatering under vacuum environment 1-2 hour;
D: pass into nitrogen in the mixture in c step, flask is cooled to 50-70 ℃, add aromatic diisocyanate reaction 1-3 hour, then carry out the mensuration for the first time of isocyanic ester base value (nco value);
E: the mixture obtaining in d step dripped main chainextender and colour developing chainextender at 50-70 ℃ in 20-40 minute;
F: add acetone to reduce mixture viscosity in the mixture in e step, and react 3-8 hour under 50-70 ℃ of environment, then carry out the mensuration for the second time of isocyanic ester base value (nco value);
G: the mixture of f step is cooled to 30-40 ℃, and adds organic neutralizer reaction 10-30 minute;
H: the mixture that g step is made is transferred in Emulsion cask, adds water to carry out emulsification 20-40 minute;
I: chainextender after adding in the mixture making in g step, and dispersed with stirring 20-50 minute, then filter;
J: obtain colour polyurethane emulsion after extracting the acetone in i step gained mixture.
The present invention has the following advantages:
1, the colour polyurethane emulsion for waterproof paint of the present invention adopts the mixed chain extender system of hydrophilic chain extender, main chainextender and rear chainextender.By dividing and add hydrophilic chain extender, main chainextender and rear chainextender for three times in whole reaction process, progressively promote the molecular weight of polyurethane molecular chain, make chromophoric group energy smoothly and polyurethane backbone grafting.Above-mentioned graft reaction can promote the Chemical bond energy of chromophoric group and polyurethane backbone, greatly improved stability and the color developing of chromophoric group after reaction completes, avoid the phenomenons such as chromophoric group occurs variable color, fades after machining, efflorescence, solved the problem of separating out contaminate environment after chromophoric group processing.And hydrophilic chain extender can play self-emulsifying after adding organic neutralizer, promoted the emulsifying effectiveness of emulsion in water.
2, the colour polyurethane emulsion for waterproof paint of the present invention adopts aromatic diisocyanate to form polyurethane backbone by reaction, and phenyl ring can be given the intensity that polyurethane backbone is higher, can improve the remarkable shock strength of improving coating paint film.
3, the colour polyurethane emulsion for waterproof paint of the present invention adopts poly-dihydric alcohol as the chaining agent of polyurethane backbone, poly-dihydric alcohol is certainly as flexible molecule chain structure, it adds can make polyurethane backbone have good snappiness and ductility, can significantly improve tensile strength and the extensibility of coating paint film.
4, the preparation method of the colour polyurethane emulsion for waterproof paint of the present invention, adopt acetone as the solvent that becomes chain reaction, the temperature of whole reaction system is controlled to 30-120 ℃, and progressively reduce temperature of reaction in whole reaction process, above-mentioned preparation method carries out the processes such as grafting of formation, chain extension and the chromophoric group of polyurethane backbone under comparatively gentle reaction environment, can significantly improve the stability of reaction system, and save other following process operation in traditional colour polyurethane emulsion processing.
Embodiment
Colour polyurethane emulsion for waterproof paint of the present invention mainly comprises aromatic diisocyanate, poly-dihydric alcohol, chainextender, organic neutralizer and water.Aromatic diisocyanate reacts in reaction system with poly-dihydric alcohol and forms polyurethane backbone, and forms macromolecular chain structure under the step reaction of chainextender, and colour developing group is grafted on molecular chain in macromolecular chain forming process.Macromolecular chain polarity after organic neutralizer capable of regulating reaction system completes, improves the dispersity that emulsion adds emulsification after water.Said components content is respectively by mass fraction: water: 100 parts; Aromatic diisocyanate: 10-20 part; Poly-dihydric alcohol: 15-30 part; Chainextender: 4-8 part; Organic neutralizer: 1-5 part.In the present invention, chainextender mainly comprises hydrophilic chain extender, main chainextender and rear chainextender, and the content of hydrophilic chain extender, main chainextender and rear chainextender is respectively by mass fraction: hydrophilic chain extender: 1-2 part; Main chainextender: 2-4 part; Rear chainextender: 1-2 part.By above-mentioned three kinds of chainextenders, polyurethane backbone is carried out to gradation chain extension, improve the grafting stability of colour developing group.
Poly-dihydric alcohol of the present invention adopts polypropylene glycol, and polypropylene glycol molecular chain has good flexibility, when polyurethane backbone chaining, can give toughness and the ductility that molecular chain is higher, makes emulsion after varnish formation, have higher tensile strength and extension property.
Aromatic diisocyanate of the present invention adopts tolylene diisocyanate, because tolylene diisocyanate only has a phenyl ring, when strengthening molecular chain rigidity, it has higher polarity, and therefore after reacting chaining with poly-dihydric alcohol, it has good snappiness.
Hydrophilic chain extender of the present invention, main chainextender and rear chainextender adopt respectively dimethylol propionic acid, BDO and quadrol.Dimethylol propionic acid except forming chain extension effect polyurethane backbone, also makes urethane obtain automatic emulsifying performance in reaction system, can improve the stability of polyurethane backbone.BDO can further expand the molecular weight of polyurethane backbone after urethane chaining, gives the snappiness that molecular chain is higher simultaneously.Quadrol is the rear chainextender finally adding, and in reaction system, after neutralization, adds, and it can improve the molecular weight of polyurethane backbone equally, and can further chromophoric group be locked in polyurethane backbone.
Organic neutralizer of the present invention adopts triethylamine, triethylamine possesses the characteristic of organic bases, it adds and can regulate being totally acid chemical environment in reaction system, can reduce the polarity of polyurethane molecular main chain and chromophoric group, is beneficial to follow-up dispersion and emulsion processing.
In addition, the colour polyurethane emulsion for waterproof paint of the present invention has also added colour developing chainextender, and colour developing chainextender content is pressed massfraction and calculated as 1-2 part.Colour developing chainextender mainly comprises blue chainextender, red chainextender and yellow chainextender, adds and can add wherein any one man-hour.Blue chainextender, red chainextender and yellow the chainextender respectively composition of correspondence are: blue chainextender: Isosorbide-5-Nitrae-bis-(2-hydroxyethylamino) anthracene-9,10-diketone; Two (2-hydroxyethyl) amino of red chainextender: 1-() anthracene-9,10-diketone; Yellow chainextender: N, two (2-the hydroxyethyl)-4-N-methyl-p-nitroanilines of N-.
Colour polyurethane emulsion preparation method for waterproof paint of the present invention comprises the following steps:
A: take raw material for standby according to said ratio;
B: in being housed, the flask of agitator adds poly-dihydric alcohol, and standby after dewatering 1-3 hour under 100-120 ℃, vacuum environment;
C: the mixture of b step is cooled to 70-90 ℃, adds hydrophilic chain extender, and standby after dewatering under vacuum environment 1-2 hour;
D: pass into nitrogen in the mixture in c step, flask is cooled to 50-70 ℃, add aromatic diisocyanate reaction 1-3 hour, then carry out the mensuration for the first time of isocyanic ester base value (nco value);
E: the mixture obtaining in d step dripped main chainextender and colour developing chainextender at 50-70 ℃ in 20-40 minute;
F: add acetone to reduce mixture viscosity in the mixture in e step, and react 3-8 hour under 50-70 ℃ of environment, then carry out the mensuration for the second time of isocyanic ester base value (nco value);
G: the mixture of f step is cooled to 30-40 ℃, and adds organic neutralizer reaction 10-30 minute;
H: the mixture that g step is made is transferred in Emulsion cask, adds water to carry out emulsification 20-40 minute;
I: chainextender after adding in the mixture making in g step, and dispersed with stirring 20-50 minute, then filter;
J: obtain colour polyurethane emulsion after extracting the acetone in i step gained mixture.
The present invention adds chainextender to make polyurethane backbone through three chain extension processes by three times, its temperature of reaction is set in 30-120 ℃, and progressively reduce temperature of reaction, the processes such as grafting of formation, chain extension and the chromophoric group of polyurethane backbone are carried out under comparatively gentle reaction environment.Chromophoric group, by mode and the polyurethane backbone polymerization of grafting, is strengthened the stability of molecular chain, has improved chromophoric group in reacted intensity and ductility, has improved the toughness of paint film simultaneously.According to the standard test of GB1720-1979 paint film adhesion, the paint film adhesion of the colour polyurethane emulsion for waterproof paint of the present invention is one-level; According to the standard test of GB/T1732-1993 paint film shock strength, the paint film shock strength of the colour polyurethane emulsion for waterproof paint of the present invention is 40-60kgcm, and paint film elongation at break is 75%-85%.
Below in conjunction with table, a pair of each embodiment is elaborated, but does not therefore limit the invention in described scope of embodiments:
Embodiment 1
Colour polyurethane emulsion for waterproof paint of the present invention mainly comprises water, tolylene diisocyanate, polypropylene glycol, dimethylol propionic acid, 1,4-butyleneglycol, quadrol, triethylamine and 1, two (2-hydroxyethylamino) anthracene-9 of 4-, 10-diketone (blue chainextender), said components is respectively by mass fraction: water: 100 parts; Tolylene diisocyanate: 10 parts; Polypropylene glycol: 15 parts; Dimethylol propionic acid: 1 part; BDO: 2 parts; Quadrol: 1 part; Triethylamine: 1 part; Isosorbide-5-Nitrae-bis-(2-hydroxyethylamino) anthracene-9,10-diketone: 1 part.By tolylene diisocyanate, react in reaction system with polypropylene glycol and form polyurethane backbone, and at dimethylol propionic acid, 1, under the step reaction of 4-butyleneglycol, quadrol, form macromolecular chain structure, and 1, two (2-hydroxyethylamino) anthracene-9 of 4-, 10-diketone is grafted on molecular chain in macromolecular chain forming process.
Colour polyurethane emulsion preparation method for waterproof paint of the present invention comprises the following steps:
A: take raw material for standby according to said ratio;
B: in being housed, the flask of agitator adds polypropylene glycol, and standby after dewatering 1 hour under 100 ℃, vacuum environment;
C: the mixture of b step is cooled to 70 ℃, adds dimethylol propionic acid, and standby after dewatering under vacuum environment 1 hour;
D: pass into nitrogen in the mixture in c step, flask is cooled to 50 ℃, add tolylene diisocyanate reaction 1 hour, then carry out the mensuration for the first time of isocyanic ester base value (nco value);
E: the mixture obtaining in d step dripped BDO and Isosorbide-5-Nitrae-bis-(2-hydroxyethylamino) anthracene-9,10-diketone at 50 ℃ in 20 minutes;
F: add acetone to reduce mixture viscosity in the mixture in e step, and react 3 hours under 50 ℃ of environment, then carry out the mensuration for the second time of isocyanic ester base value (nco value);
G: the mixture of f step is cooled to 30 ℃, and adds triethylamine reaction 10 minutes;
H: the mixture that g step is made is transferred in Emulsion cask, adds water to carry out emulsification 20 minutes;
I: in the mixture making in g step, add quadrol, and dispersed with stirring 20 minutes, then filter;
J: obtain colour polyurethane emulsion after extracting the acetone in i step gained mixture.
After tested, the sticking power grade of the colour polyurethane emulsion for waterproof paint of the present invention is one-level, and paint film shock strength is 40 kgcm, and paint film elongation at break is 75%.
Embodiment 2
Colour polyurethane emulsion for waterproof paint of the present invention mainly comprises water, tolylene diisocyanate, polypropylene glycol, dimethylol propionic acid, 1, two (2-hydroxyethyl) amino of 4-butyleneglycol, quadrol, triethylamine and 1-() anthracene-9,10-diketone (red chainextender), said components is respectively by mass fraction: water: 100 parts; Tolylene diisocyanate: 13 parts; Polypropylene glycol: 18 parts; Dimethylol propionic acid: 1 part; BDO: 2 parts; Quadrol: 2 parts; Triethylamine: 2 parts; Two (2-hydroxyethyl) amino of 1-() anthracene-9,10-diketone: 1 part.By tolylene diisocyanate, react in reaction system with polypropylene glycol and form polyurethane backbone, and at dimethylol propionic acid, 1, under the step reaction of 4-butyleneglycol, quadrol, form macromolecular chain structure, and two (2-hydroxyethyl) amino of 1-() anthracene-9,10-diketone is grafted on molecular chain in macromolecular chain forming process.
Colour polyurethane emulsion preparation method for waterproof paint of the present invention comprises the following steps:
A: take raw material for standby according to said ratio;
B: in being housed, the flask of agitator adds polypropylene glycol, and standby after dewatering 1.5 hours under 105 ℃, vacuum environment;
C: the mixture of b step is cooled to 77 ℃, adds dimethylol propionic acid, and standby after dewatering under vacuum environment 1 hour;
D: pass into nitrogen in the mixture in c step, flask is cooled to 56 ℃, add tolylene diisocyanate reaction 2 hours, then carry out the mensuration for the first time of isocyanic ester base value (nco value);
E: the mixture obtaining in d step dripped BDO and two (2-hydroxyethyl) amino of 1-(at 56 ℃ in 24 minutes) anthracene-9,10-diketone;
F: add acetone to reduce mixture viscosity in the mixture in e step, and react 3.5 hours under 55 ℃ of environment, then carry out the mensuration for the second time of isocyanic ester base value (nco value);
G: the mixture of f step is cooled to 32 ℃, and adds triethylamine reaction 16 minutes;
H: the mixture that g step is made is transferred in Emulsion cask, adds water to carry out emulsification 25 minutes;
I: in the mixture making in g step, add quadrol, and dispersed with stirring 26 minutes, then filter;
J: obtain colour polyurethane emulsion after extracting the acetone in i step gained mixture.
After tested, the sticking power grade of the colour polyurethane emulsion for waterproof paint of the present invention is one-level, and paint film shock strength is 48 kgcm, and paint film elongation at break is 78%.
Embodiment 3
Colour polyurethane emulsion for waterproof paint of the present invention mainly comprises water, tolylene diisocyanate, polypropylene glycol, dimethylol propionic acid, 1,4-butyleneglycol, quadrol, triethylamine and N, two (2-the hydroxyethyl)-4-N-methyl-p-nitroanilines (yellow chainextender) of N-, said components is respectively by mass fraction: water: 100 parts; Tolylene diisocyanate: 15 parts; Polypropylene glycol: 23 parts; Dimethylol propionic acid: 2 parts; BDO: 3 parts; Quadrol: 1 part; Triethylamine: 3 parts; N, two (2-the hydroxyethyl)-4-N-methyl-p-nitroanilines of N-: 2 parts.By tolylene diisocyanate, react in reaction system with polypropylene glycol and form polyurethane backbone, and at dimethylol propionic acid, 1, under the step reaction of 4-butyleneglycol, quadrol, form macromolecular chain structure, and N, two (2-the hydroxyethyl)-4-N-methyl-p-nitroanilines of N-are grafted on molecular chain in macromolecular chain forming process.
Colour polyurethane emulsion preparation method for waterproof paint of the present invention comprises the following steps:
A: take raw material for standby according to said ratio;
B: in being housed, the flask of agitator adds polypropylene glycol, and standby after dewatering 2 hours under 112 ℃, vacuum environment;
C: the mixture of b step is cooled to 81 ℃, adds dimethylol propionic acid, and standby after dewatering under vacuum environment 1.5 hours;
D: pass into nitrogen in the mixture in c step, flask is cooled to 62 ℃, add tolylene diisocyanate reaction 2.5 hours, then carry out the mensuration for the first time of isocyanic ester base value (nco value);
E: the mixture obtaining in d step dripped BDO and N at 63 ℃ in 29 minutes, two (2-the hydroxyethyl)-4-N-methyl-p-nitroanilines of N-;
F: add acetone to reduce mixture viscosity in the mixture in e step, and react 5 hours under 62 ℃ of environment, then carry out the mensuration for the second time of isocyanic ester base value (nco value);
G: the mixture of f step is cooled to 35 ℃, and adds triethylamine reaction 20 minutes;
H: the mixture that g step is made is transferred in Emulsion cask, adds water to carry out emulsification 26 minutes;
I: in the mixture making in g step, add quadrol, and dispersed with stirring 35 minutes, then filter;
J: obtain colour polyurethane emulsion after extracting the acetone in i step gained mixture.
After tested, the sticking power grade of the colour polyurethane emulsion for waterproof paint of the present invention is one-level, and paint film shock strength is 53 kgcm, and paint film elongation at break is 82%.
Embodiment 4
Colour polyurethane emulsion for waterproof paint of the present invention mainly comprises water, tolylene diisocyanate, polypropylene glycol, dimethylol propionic acid, 1, two (2-hydroxyethyl) amino of 4-butyleneglycol, quadrol, triethylamine and 1-() anthracene-9,10-diketone (red chainextender), said components is respectively by mass fraction: water: 100 parts; Tolylene diisocyanate: 18 parts; Polypropylene glycol: 27 parts; Dimethylol propionic acid: 2 parts; BDO: 2 parts; Quadrol: 2 parts; Triethylamine: 4 parts; Two (2-hydroxyethyl) amino of 1-() anthracene-9,10-diketone: 2 parts.By tolylene diisocyanate, react in reaction system with polypropylene glycol and form polyurethane backbone, and at dimethylol propionic acid, 1, under the step reaction of 4-butyleneglycol, quadrol, form macromolecular chain structure, and two (2-hydroxyethyl) amino of 1-() anthracene-9,10-diketone is grafted on molecular chain in macromolecular chain forming process.
Colour polyurethane emulsion preparation method for waterproof paint of the present invention comprises the following steps:
A: take raw material for standby according to said ratio;
B: in being housed, the flask of agitator adds polypropylene glycol, and standby after dewatering 2.5 hours under 117 ℃, vacuum environment;
C: the mixture of b step is cooled to 86 ℃, adds dimethylol propionic acid, and standby after dewatering under vacuum environment 1 hour;
D: pass into nitrogen in the mixture in c step, flask is cooled to 67 ℃, add tolylene diisocyanate reaction 2.5 hours, then carry out the mensuration for the first time of isocyanic ester base value (nco value);
E: the mixture obtaining in d step dripped BDO and two (2-hydroxyethyl) amino of 1-(at 66 ℃ in 37 minutes) anthracene-9,10-diketone;
F: add acetone to reduce mixture viscosity in the mixture in e step, and react 7 hours under 65 ℃ of environment, then carry out the mensuration for the second time of isocyanic ester base value (nco value);
G: the mixture of f step is cooled to 37 ℃, and adds triethylamine reaction 28 minutes;
H: the mixture that g step is made is transferred in Emulsion cask, adds water to carry out emulsification 35 minutes;
I: in the mixture making in g step, add quadrol, and dispersed with stirring 42 minutes, then filter;
J: obtain colour polyurethane emulsion after extracting the acetone in i step gained mixture.
After tested, the sticking power grade of the colour polyurethane emulsion for waterproof paint of the present invention is one-level, and paint film shock strength is 57 kgcm, and paint film elongation at break is 84%.
Embodiment 5
Colour polyurethane emulsion for waterproof paint of the present invention mainly comprises water, tolylene diisocyanate, polypropylene glycol, dimethylol propionic acid, 1,4-butyleneglycol, quadrol, triethylamine and 1, two (2-hydroxyethylamino) anthracene-9 of 4-, 10-diketone (blue chainextender), said components is respectively by mass fraction: water: 100 parts; Tolylene diisocyanate: 20 parts; Polypropylene glycol: 30 parts; Dimethylol propionic acid: 2 parts; BDO: 4 parts; Quadrol: 2 parts; Triethylamine: 5 parts; Isosorbide-5-Nitrae-bis-(2-hydroxyethylamino) anthracene-9,10-diketone: 2 parts.By tolylene diisocyanate, react in reaction system with polypropylene glycol and form polyurethane backbone, and at dimethylol propionic acid, 1, under the step reaction of 4-butyleneglycol, quadrol, form macromolecular chain structure, and 1, two (2-hydroxyethylamino) anthracene-9 of 4-, 10-diketone is grafted on molecular chain in macromolecular chain forming process.
Colour polyurethane emulsion preparation method for waterproof paint of the present invention comprises the following steps:
A: take raw material for standby according to said ratio;
B: in being housed, the flask of agitator adds polypropylene glycol, and standby after dewatering 3 hours under 120 ℃, vacuum environment;
C: the mixture of b step is cooled to 90 ℃, adds dimethylol propionic acid, and standby after dewatering under vacuum environment 2 hours;
D: pass into nitrogen in the mixture in c step, flask is cooled to 70 ℃, add tolylene diisocyanate reaction 3 hours, then carry out the mensuration for the first time of isocyanic ester base value (nco value);
E: the mixture obtaining in d step dripped BDO and Isosorbide-5-Nitrae-bis-(2-hydroxyethylamino) anthracene-9,10-diketone at 70 ℃ in 40 minutes;
F: add acetone to reduce mixture viscosity in the mixture in e step, and react 8 hours under 70 ℃ of environment, then carry out the mensuration for the second time of isocyanic ester base value (nco value);
G: the mixture of f step is cooled to 40 ℃, and adds triethylamine reaction 30 minutes;
H: the mixture that g step is made is transferred in Emulsion cask, adds water to carry out emulsification 40 minutes;
I: in the mixture making in g step, add quadrol, and dispersed with stirring 50 minutes, then filter;
J: obtain colour polyurethane emulsion after extracting the acetone in i step gained mixture.
After tested, the sticking power grade of the colour polyurethane emulsion for waterproof paint of the present invention is one-level, and paint film shock strength is 60 kgcm, and paint film elongation at break is 85%.
Table one (composition unit is mass fraction)
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Water | 100 | 100 | 100 | 100 | 100 |
| Tolylene diisocyanate | 10 | 13 | 15 | 18 | 20 |
| Polypropylene glycol | 15 | 18 | 23 | 27 | 30 |
| Dimethylol propionic acid | 1 | 1 | 2 | 2 | 2 |
| BDO | 2 | 2 | 3 | 2 | 4 |
| Quadrol | 1 | 2 | 1 | 2 | 2 |
| Triethylamine | 1 | 2 | 3 | 4 | 5 |
| Isosorbide-5-Nitrae-bis-(2-hydroxyethylamino) anthracene-9,10-diketone | 1 | 0 | 0 | 0 | 2 |
| Two (2-hydroxyethyl) amino of 1-() anthracene-9,10-diketone | 0 | 1 | 0 | 2 | 0 |
| N, two (2-the hydroxyethyl)-4-N-methyl-p-nitroanilines of N- | 0 | 0 | 2 | 0 | 0 |
| Sticking power grade | One-level | One-level | One-level | One-level | One-level |
| Paint film shock strength (units/kg cm) | 40 | 48 | 53 | 57 | 60 |
| Paint film elongation at break (%) | 75 | 78 | 82 | 84 | 85 |
Claims (10)
1. the colour polyurethane emulsion for waterproof paint, it is characterized in that: the described colour polyurethane emulsion for waterproof paint comprises aromatic diisocyanate, poly-dihydric alcohol, chainextender, organic neutralizer and water, and said components content is respectively by mass fraction: water: 100 parts; Aromatic diisocyanate: 10-20 part; Poly-dihydric alcohol: 15-30 part; Chainextender: 4-8 part; Organic neutralizer: 1-5 part, described chainextender comprises hydrophilic chain extender, main chainextender and rear chainextender, the content of hydrophilic chain extender, main chainextender and rear chainextender is respectively by mass fraction: hydrophilic chain extender: 1-2 part; Main chainextender: 2-4 part; Rear chainextender: 1-2 part.
2. according to claim 1 for the colour polyurethane emulsion of waterproof paint, it is characterized in that: described poly-dihydric alcohol is polypropylene glycol.
3. according to claim 1 for the colour polyurethane emulsion of waterproof paint, it is characterized in that: described aromatic diisocyanate is tolylene diisocyanate.
4. according to claim 1 for the colour polyurethane emulsion of waterproof paint, it is characterized in that: described hydrophilic chain extender is dimethylol propionic acid.
5. according to claim 1 for the colour polyurethane emulsion of waterproof paint, it is characterized in that: described main chainextender is BDO.
6. according to claim 1 for the colour polyurethane emulsion of waterproof paint, it is characterized in that: described rear chainextender is quadrol.
7. according to claim 1 for the colour polyurethane emulsion of waterproof paint, it is characterized in that: described organic neutralizer is triethylamine.
8. according to claim 1 for the colour polyurethane emulsion of waterproof paint, it is characterized in that: the described colour polyurethane emulsion for waterproof paint comprises colour developing chainextender, colour developing chainextender content is pressed massfraction and is calculated as 1-2 part.
9. according to claim 8 for the colour polyurethane emulsion of waterproof paint, it is characterized in that: described colour developing chainextender comprises a kind of in blue chainextender, red chainextender and yellow chainextender.
10. as claimed in claim 1 for a preparation method for the colour polyurethane emulsion of waterproof paint, it is characterized in that: described preparation method comprises the following steps:
A: take raw material for standby according to said ratio;
B: in being housed, the flask of agitator adds poly-dihydric alcohol, and standby after dewatering 1-3 hour under 100-120 ℃, vacuum environment;
C: the mixture of b step is cooled to 70-90 ℃, adds hydrophilic chain extender, and standby after dewatering under vacuum environment 1-2 hour;
D: pass into nitrogen in the mixture in c step, flask is cooled to 50-70 ℃, add aromatic diisocyanate reaction 1-3 hour, then carry out the mensuration for the first time of isocyanic ester base value (nco value);
E: the mixture obtaining in d step dripped main chainextender and colour developing chainextender at 50-70 ℃ in 20-40 minute;
F: add acetone to reduce mixture viscosity in the mixture in e step, and react 3-8 hour under 50-70 ℃ of environment, then carry out the mensuration for the second time of isocyanic ester base value (nco value);
G: the mixture of f step is cooled to 30-40 ℃, and adds organic neutralizer reaction 10-30 minute;
H: the mixture that g step is made is transferred in Emulsion cask, adds water to carry out emulsification 20-40 minute;
I: chainextender after adding in the mixture making in g step, and dispersed with stirring 20-50 minute, then filter;
J: obtain colour polyurethane emulsion after extracting the acetone in i step gained mixture.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105462479A (en) * | 2015-12-21 | 2016-04-06 | 潍坊市宏源防水材料有限公司 | Environment-friendly weather-proof self-stratifying one-component waterproof paint and preparation method thereof |
| CN107226896A (en) * | 2017-07-18 | 2017-10-03 | 温州南力实业有限公司 | A kind of preparation method of water-soluble yellow urethane dyestuff |
| CN108727960A (en) * | 2018-06-13 | 2018-11-02 | 合肥仁德电子科技有限公司 | A kind of water-repellent paint and preparation method thereof for phone housing |
| CN109880049A (en) * | 2019-02-26 | 2019-06-14 | 安徽清彩科技有限公司 | A kind of colored preparation method and application for covering polyaminoester emulsion of copolymerization |
| CN110527062A (en) * | 2019-09-11 | 2019-12-03 | 苏州大学 | Coloud coding supramolecular hydrogel and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102924682A (en) * | 2012-09-29 | 2013-02-13 | 嘉兴禾欣化学工业有限公司 | Preparation method of colorful polyurethane emulsion |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102924682A (en) * | 2012-09-29 | 2013-02-13 | 嘉兴禾欣化学工业有限公司 | Preparation method of colorful polyurethane emulsion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105462479A (en) * | 2015-12-21 | 2016-04-06 | 潍坊市宏源防水材料有限公司 | Environment-friendly weather-proof self-stratifying one-component waterproof paint and preparation method thereof |
| CN107226896A (en) * | 2017-07-18 | 2017-10-03 | 温州南力实业有限公司 | A kind of preparation method of water-soluble yellow urethane dyestuff |
| CN108727960A (en) * | 2018-06-13 | 2018-11-02 | 合肥仁德电子科技有限公司 | A kind of water-repellent paint and preparation method thereof for phone housing |
| CN109880049A (en) * | 2019-02-26 | 2019-06-14 | 安徽清彩科技有限公司 | A kind of colored preparation method and application for covering polyaminoester emulsion of copolymerization |
| CN110527062A (en) * | 2019-09-11 | 2019-12-03 | 苏州大学 | Coloud coding supramolecular hydrogel and preparation method thereof |
| CN110527062B (en) * | 2019-09-11 | 2021-07-20 | 苏州大学 | Color coding supermolecule hydrogel and preparation method thereof |
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