CN116640501A - Preparation and experimental method of high-hardness polyurethane foam skinning coating - Google Patents
Preparation and experimental method of high-hardness polyurethane foam skinning coating Download PDFInfo
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- CN116640501A CN116640501A CN202310641608.1A CN202310641608A CN116640501A CN 116640501 A CN116640501 A CN 116640501A CN 202310641608 A CN202310641608 A CN 202310641608A CN 116640501 A CN116640501 A CN 116640501A
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- 238000000576 coating method Methods 0.000 title claims abstract description 136
- 239000011248 coating agent Substances 0.000 title claims abstract description 133
- 229920005830 Polyurethane Foam Polymers 0.000 title claims abstract description 115
- 239000011496 polyurethane foam Substances 0.000 title claims abstract description 115
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 238000002474 experimental method Methods 0.000 title abstract description 8
- 229920002635 polyurethane Polymers 0.000 claims abstract description 111
- 239000004814 polyurethane Substances 0.000 claims abstract description 111
- 239000000463 material Substances 0.000 claims abstract description 79
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 63
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 61
- 229920000570 polyether Polymers 0.000 claims abstract description 61
- 229920005862 polyol Polymers 0.000 claims abstract description 61
- 150000003077 polyols Chemical class 0.000 claims abstract description 61
- 239000007822 coupling agent Substances 0.000 claims abstract description 40
- 239000002562 thickening agent Substances 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 37
- 238000001035 drying Methods 0.000 claims abstract description 29
- 239000003054 catalyst Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- UTWHRPIUNFLOBE-UHFFFAOYSA-H neodymium(3+);tricarbonate Chemical compound [Nd+3].[Nd+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O UTWHRPIUNFLOBE-UHFFFAOYSA-H 0.000 claims abstract description 24
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims abstract description 24
- -1 acrylic ester Chemical class 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims description 78
- 230000008033 biological extinction Effects 0.000 claims description 61
- 238000002156 mixing Methods 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000003973 paint Substances 0.000 claims description 14
- 238000005187 foaming Methods 0.000 claims description 13
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 229920000881 Modified starch Polymers 0.000 claims description 3
- 239000004368 Modified starch Substances 0.000 claims description 3
- HDSBZMRLPLPFLQ-UHFFFAOYSA-N Propylene glycol alginate Chemical compound OC1C(O)C(OC)OC(C(O)=O)C1OC1C(O)C(O)C(C)C(C(=O)OCC(C)O)O1 HDSBZMRLPLPFLQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 235000019426 modified starch Nutrition 0.000 claims description 3
- 239000000770 propane-1,2-diol alginate Substances 0.000 claims description 3
- 235000010409 propane-1,2-diol alginate Nutrition 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000007935 neutral effect Effects 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 2
- 125000005396 acrylic acid ester group Chemical group 0.000 description 8
- 239000006260 foam Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Food Science & Technology (AREA)
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- Polyurethanes Or Polyureas (AREA)
Abstract
The application relates to the technical field of high polymer materials, and discloses a preparation and experimental method of a high-hardness polyurethane foam skinning coating, which comprises the following materials: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, a leveling agent, modified palygorskite, a catalyst, hydrated neodymium carbonate, a stripping aid, matting powder, a coupling agent, a thickening agent and a pH regulator. The experimental result shows that the formaldehyde removal rate of the polyurethane foam skinning coating is reduced when the pH value is biased to be neutral, and the coating drying time is effectively reduced, so that the material proportion influences the product use effect of the polyurethane foam skinning coating, the control of the pH value is also important in the preparation process of the polyurethane foam skinning coating, the pH value also influences the product effect after the preparation of the polyurethane foam skinning coating, and a new thought and improvement point is provided for the preparation of the polyurethane foam skinning coating.
Description
Technical Field
The application relates to the technical field of high polymer materials, in particular to a preparation and experimental method of a high-hardness polyurethane foam skinning coating.
Background
The hard foam is prepared by mixing and spraying the main raw materials under the action of various auxiliary agents such as catalyst, and the like under high pressure. The polyurethane foam has two types of soft foam, wherein the soft foam is open, and the hard foam has a closed cell structure; soft bubbles are divided into two types, namely soft bubbles and non-skinning ones, and the main function of soft bubbles is buffering. The polyurethane soft foam is commonly used for sofa furniture, pillows, cushions, toys, clothes and sound insulation linings, the body is a novel type with heat preservation and waterproof functions, is low in temperature and waterproof performance, and is only 0.022-0.033W/(m is K), corresponding to half, and is the lowest in heat conductivity coefficient in all. The method is mainly applied to building, roof waterproof heat insulation integration, refrigeration house heat insulation, pipeline heat insulation materials, building, refrigerator car and refrigeration house heat insulation materials, and the influence of pH on the final use effect of the product coating is large when the polyurethane foam skinning coating is often prepared in the preparation and use processes.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the application provides a preparation and experimental method of a high-hardness polyurethane foam skinning coating, which has the advantages of optimizing the preparation flow of the polyurethane foam skinning coating and improving the using effect of the product.
(II) technical scheme
In order to achieve the above purpose, the present application provides the following technical solutions: the high-hardness polyurethane foam skinning coating comprises the following materials in parts by weight:
75-85 parts of polyether polyol
Toluene diisocyanate 80-100 parts
60-80 parts of polyether polyol
Acrylic ester 15-20 parts
150-200 parts of aqueous polyurethane
5-6 parts of leveling agent
10-12 parts of modified palygorskite
5-6 parts of catalyst
25-30 parts of hydrated neodymium carbonate
Stripping aid 3-4 parts
2-4 parts of extinction powder
1-2 parts of coupling agent
3-6 parts of thickening agent
4-8 parts of pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s102, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s103, adding a pH regulator into the step S102 to regulate the pH value;
s104, finally adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s105, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s106, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
and S107, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Preferably, the coupling agent is a product of vinyl triethoxy siloxane and y-methacryloxypropyl trimethoxy siloxane mixed according to a ratio of 1:1.
Preferably, the thickener is one of modified starch, modified cellulose and propylene glycol alginate.
Preferably, the aqueous polyurethane is added in step S104 twice, the first time is 35%, the second time is 65%, and the leveling agent and the catalyst are added after the aqueous polyurethane is completely added to promote the reaction.
Preferably, the drying temperature is 45 ℃ and the drying time is 15min when the polyurethane foam coating is dried in the step S107, and the polyurethane foam coating is uniformly dried through a drying box at a speed of 16 m/min.
Preferably, performance detection is carried out on the prepared high-hardness polyurethane foam skinning coating, and the hardness, the coating drying time and the environmental protection of the polyurethane foam skinning coating are tested.
Compared with the prior art, the application provides a preparation and experimental method of a high-hardness polyurethane foam skinning coating, which has the following beneficial effects:
1. according to the preparation and experimental method of the high-hardness polyurethane foam skinning coating, the formaldehyde removal rate of the polyurethane foam skinning coating is reduced when the pH value is biased to be neutral through experimental results, and the coating drying time is effectively shortened, so that the use effect of the polyurethane foam skinning coating can be influenced by the proportion of materials, the control of the pH value is also important in the preparation process of the polyurethane foam skinning coating, the effect of the polyurethane foam skinning coating after the preparation is influenced by the pH value, and new ideas and improvement points are provided for the preparation of the polyurethane foam skinning coating.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The high-hardness polyurethane foam skinning coating comprises the following materials in parts by weight:
75-85 parts of polyether polyol
Toluene diisocyanate 80-100 parts
60-80 parts of polyether polyol
Acrylic ester 15-20 parts
150-200 parts of aqueous polyurethane
5-6 parts of leveling agent
10-12 parts of modified palygorskite
5-6 parts of catalyst
25-30 parts of hydrated neodymium carbonate
Stripping aid 3-4 parts
2-4 parts of extinction powder
1-2 parts of coupling agent
3-6 parts of thickening agent
4-8 parts of pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s102, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s103, adding a pH regulator into the step S102 to regulate the pH value;
s104, finally adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s105, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s106, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
and S107, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Further, the coupling agent is a product obtained by mixing vinyl triethoxy siloxane and y-methacryloxypropyl trimethoxy siloxane according to a ratio of 1:1.
Further, the thickener is one of modified starch, modified cellulose and propylene glycol alginate.
Further, in the step S104, the aqueous polyurethane is added twice, wherein 35% is added for the first time, 65% is added for the second time, and the leveling agent and the catalyst are added to promote the further reaction after the aqueous polyurethane is added completely.
Further, the drying temperature is 45 ℃ and the drying time is 15min when the polyurethane foam coating is dried in the step S107, and the polyurethane foam coating is uniformly dried through a drying box at a speed of 16 m/min.
Further, performance detection is carried out on the prepared high-hardness polyurethane foam skinning coating, and the hardness, the coating drying time and the environmental protection of the polyurethane foam skinning coating are tested.
Embodiment one:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
75 parts of polyether polyol
Toluene diisocyanate 80 parts
Polyether polyol 60
Acrylic acid ester 15 parts
150 parts of aqueous polyurethane
Leveling agent 5 parts
10 parts of modified palygorskite
Catalyst 5 parts
Hydrated neodymium carbonate 25 parts
Stripping aid 3 parts
Matting powder 2 parts
1 part of coupling agent
Thickener 3 parts
4 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Embodiment two:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
80 parts of polyether polyol
Toluene diisocyanate 90 parts
70 parts of polyether polyol
17.5 parts of acrylic acid ester
175 parts of aqueous polyurethane
Leveling agent 5.5 parts
11 parts of modified palygorskite
Catalyst 5.5 parts
Hydrated neodymium carbonate 27.5 parts
Stripping aid 3.5 parts
3 parts of extinction powder
1.5 parts of coupling agent
4.5 parts of thickener
6 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Embodiment III:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
85 parts of polyether polyol
Toluene diisocyanate 100 parts
80 parts of polyether polyol
Acrylic ester 20 parts
200 parts of waterborne polyurethane
6 parts of leveling agent
12 parts of modified palygorskite
6 parts of catalyst
30 parts of hydrated neodymium carbonate
Stripping aid 4 parts
4 parts of extinction powder
2 parts of coupling agent
6 parts of thickening agent
8 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Comparative example one:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
70 parts of polyether polyol
Toluene diisocyanate 75 parts
65 parts of polyether polyol
Acrylic acid ester 12 parts
140 parts of aqueous polyurethane
4.5 parts of leveling agent
8 parts of modified palygorskite
Catalyst 4.5 parts
Hydrated neodymium carbonate 23 parts
Stripping aid 2.5 parts
1.5 parts of extinction powder
0.75 part of coupling agent
Thickener 2.5 parts
3.5 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Comparative example two:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
90 parts of polyether polyol
Toluene diisocyanate 110 parts
85 parts of polyether polyol
25 parts of acrylic ester
220 parts of aqueous polyurethane
6.5 parts of leveling agent
14 parts of modified palygorskite
6.5 parts of catalyst
Hydrated neodymium carbonate 35 parts
Stripping aid 4.5 parts
4.5 parts of extinction powder
2.5 parts of coupling agent
6.5 parts of thickener
9 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
The polyurethane foam skinning coatings prepared in the first, second, third, first and second embodiments and five different proportions are subjected to experimental detection, and the polyurethane foam skinning coatings with the same specification are selected for formaldehyde removal rate, paint film hardness, coating adhesion and coating drying time, and the test results are as follows.
According to the test results, the data of the polyurethane foam skinning coating prepared under the proportion of the second embodiment show better performance, so the preparation of the polyurethane foam skinning coating is carried out by adopting the proportion of the second embodiment.
The pH value of the polyurethane foam skinning coating prepared in the proportion of the second embodiment affects the quality of the product prepared by the polyurethane foam skinning coating;
embodiment four:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
80 parts of polyether polyol
Toluene diisocyanate 90 parts
70 parts of polyether polyol
17.5 parts of acrylic acid ester
175 parts of aqueous polyurethane
Leveling agent 5.5 parts
11 parts of modified palygorskite
Catalyst 5.5 parts
Hydrated neodymium carbonate 27.5 parts
Stripping aid 3.5 parts
3 parts of extinction powder
1.5 parts of coupling agent
4.5 parts of thickener
6 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value to 6.0;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Fifth embodiment:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
80 parts of polyether polyol
Toluene diisocyanate 90 parts
70 parts of polyether polyol
17.5 parts of acrylic acid ester
175 parts of aqueous polyurethane
Leveling agent 5.5 parts
11 parts of modified palygorskite
Catalyst 5.5 parts
Hydrated neodymium carbonate 27.5 parts
Stripping aid 3.5 parts
3 parts of extinction powder
1.5 parts of coupling agent
4.5 parts of thickener
6 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value to 7.0;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Example six:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
80 parts of polyether polyol
Toluene diisocyanate 90 parts
70 parts of polyether polyol
17.5 parts of acrylic acid ester
175 parts of aqueous polyurethane
Leveling agent 5.5 parts
11 parts of modified palygorskite
Catalyst 5.5 parts
Hydrated neodymium carbonate 27.5 parts
Stripping aid 3.5 parts
3 parts of extinction powder
1.5 parts of coupling agent
4.5 parts of thickener
6 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value to 8.0;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Comparative example three:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
80 parts of polyether polyol
Toluene diisocyanate 90 parts
70 parts of polyether polyol
17.5 parts of acrylic acid ester
175 parts of aqueous polyurethane
Leveling agent 5.5 parts
11 parts of modified palygorskite
Catalyst 5.5 parts
Hydrated neodymium carbonate 27.5 parts
Stripping aid 3.5 parts
3 parts of extinction powder
1.5 parts of coupling agent
4.5 parts of thickener
6 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value to 5.5;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
Comparative example four:
a high hardness polyurethane foam skinning coating comprising the material: polyether polyol, toluene diisocyanate, polyether polyol, acrylic ester, waterborne polyurethane, leveling agent, modified palygorskite, catalyst, hydrated neodymium carbonate, stripping aid, extinction powder, coupling agent, thickening agent and pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, preparing the following materials in parts by weight:
80 parts of polyether polyol
Toluene diisocyanate 90 parts
70 parts of polyether polyol
17.5 parts of acrylic acid ester
175 parts of aqueous polyurethane
Leveling agent 5.5 parts
11 parts of modified palygorskite
Catalyst 5.5 parts
Hydrated neodymium carbonate 27.5 parts
Stripping aid 3.5 parts
3 parts of extinction powder
1.5 parts of coupling agent
4.5 parts of thickener
6 parts of pH regulator;
s102, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s103, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s104, adding a pH regulator into the step S102 to regulate the pH value to 8.5;
s105, adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s106, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s107, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
s108, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
The polyurethane foam skinning coatings prepared in the fourth, fifth, sixth, third and fourth examples were subjected to experimental tests, and the test results are as follows:
from the results of the above experiments, it can be seen that the formaldehyde removal rate of the polyurethane foam skinning coating in the fifth embodiment is reduced when the pH value is biased towards neutral, and the coating drying time is effectively reduced, so that it can be seen that the material proportion affects the product use effect of the polyurethane foam skinning coating, the control of the pH value is also important in the preparation process of the polyurethane foam skinning coating, the pH value also affects the product effect after the preparation of the polyurethane foam skinning coating, and new ideas and improvement points are provided for the preparation of the polyurethane foam skinning coating.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A high hardness polyurethane foam skinning coating characterized by: comprises the following materials in parts by weight:
75-85 parts of polyether polyol
Toluene diisocyanate 80-100 parts
60-80 parts of polyether polyol
Acrylic ester 15-20 parts
150-200 parts of aqueous polyurethane
5-6 parts of leveling agent
10-12 parts of modified palygorskite
5-6 parts of catalyst
25-30 parts of hydrated neodymium carbonate
Stripping aid 3-4 parts
2-4 parts of extinction powder
1-2 parts of coupling agent
3-6 parts of thickening agent
4-8 parts of pH regulator;
the preparation method of the high-hardness polyurethane foam skinning coating comprises the following steps:
s101, mixing aqueous polyurethane with modified palygorskite and a coupling agent according to a ratio of 1:16:120 in water to obtain a modified palygorskite slurry;
s102, placing the modified palygorskite slurry and polyether polyol into a mixing kettle for stirring for 2 hours, and adding a thickening agent into the stirring kettle for continuous stirring for 1.5 hours;
s103, adding a pH regulator into the step S102 to regulate the pH value;
s104, finally adding water-based polyurethane and a stripping aid, and fully mixing to obtain polyurethane slurry coarse material;
s105, performing extinction treatment on the polyurethane slurry coarse material, and adding extinction powder into the polyurethane slurry coarse material to perform extinction treatment;
s106, placing the polyurethane slurry coarse material into a foaming machine to form polyurethane foam paint;
and S107, coating the polyurethane foam coating on the coating base layer, and drying to obtain the polyurethane foam coating.
2. A high hardness polyurethane foam skinning coating according to claim 1 wherein: the coupling agent is a product obtained by mixing vinyl triethoxy siloxane and y-methacryloxypropyl trimethoxy siloxane according to a ratio of 1:1.
3. A high hardness polyurethane foam skinning coating according to claim 1 wherein: the thickener is one of modified starch, modified cellulose and propylene glycol alginate.
4. A high hardness polyurethane foam skinning coating according to claim 1 wherein: in the step S104, the aqueous polyurethane is added twice, wherein 35% of the aqueous polyurethane is added for the first time, 65% of the aqueous polyurethane is added for the second time, and the leveling agent and the catalyst are added after the aqueous polyurethane is added completely to promote the further reaction.
5. A high hardness polyurethane foam skinning coating according to claim 1 wherein: the drying temperature is 45 ℃ and the drying time is 15min when the polyurethane foam coating is dried in the step S107, and the polyurethane foam coating is uniformly dried through a drying box at the speed of 16 m/min.
6. A method for testing a high hardness polyurethane foam skinning coating applied to the high hardness polyurethane foam skinning coating of claim 1, comprising the steps of: and performing performance detection on the prepared high-hardness polyurethane foam skinning coating, and testing the hardness, the coating drying time and the environmental protection of the polyurethane foam skinning coating.
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| US20150166713A1 (en) * | 2012-06-06 | 2015-06-18 | Bayer Materialscience Ag | Process for the production of viscoelastic polyurethane foam |
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