CN110862758A - PU matte white finish and preparation method thereof - Google Patents
PU matte white finish and preparation method thereof Download PDFInfo
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- CN110862758A CN110862758A CN201911044086.7A CN201911044086A CN110862758A CN 110862758 A CN110862758 A CN 110862758A CN 201911044086 A CN201911044086 A CN 201911044086A CN 110862758 A CN110862758 A CN 110862758A
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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
- 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
- C08G18/4288—Polycondensates having carboxylic or carbonic ester groups in the main chain modified by higher fatty oils or their acids or by resin acids
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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
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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Abstract
The invention relates to a PU matte white finish and a preparation method thereof. The white finish paint is composed of a component A, a component B and a component C according to the mass ratio of 1: 0.5-0.6: 0.5-0.7, wherein the component A is composed of 40-60% of lauric alkyd resin, 0.5-2% of dispersing agent, 3-6% of anti-settling slurry, 25-38% of titanium dioxide, 3-6% of flatting agent, 0.5-2% of defoaming agent, 1: 1-3% of propylene glycol methyl ether acetate 1:0.5 to 3 percent; the component B is prepared from n-butyl acetate 2: 40-60% of TDI trimer curing agent, 10-20% of TDI trimer curing agent, 15-30% of TDI prepolymer and 10-20% of HDI trimer curing agent; the component C is composed of n-butyl acetate 3: 45-60%, propylene glycol methyl ether acetate 2: 35 to 45 percent of dimethylbenzene and 5 to 10 percent of dimethylbenzene. The PU matte white finish paint obtained by the invention has strong adhesive force, large hardness, good adherence, high temperature and high humidity resistance, good comprehensive performance and wide application field.
Description
Technical Field
The invention relates to the field of coatings, in particular to a PU matte white finish and a preparation method thereof.
Background
The finish paint, also called finish paint, is a layer coated at last in the decoration of building walls, and the overall effect presented after the decoration is reflected by the layer. Therefore, the coating has higher requirements on the used materials, and has the characteristics of good pollution resistance, aging resistance, moisture resistance and mildew resistance, environmental protection, safety, no toxicity, no fire hazard, convenient construction, fast drying of a coating film, good gloss and color retention, good air permeability and the like.
The skirting line is surrounded at the wall corner of the wall root and has the functions of beautifying and protecting the wall body, and the shower room skirting line is in a high-temperature and high-humidity state for a long time, so that the phenomenon that a finish paint film is mildewed and falls off can occur. The existing paint film has low hardness, poor waterproofness, easy water vapor permeation, no high temperature resistance, and easy bubbling and shedding.
Disclosure of Invention
In view of the above, it is necessary to provide a PU matte white finish with high hardness, strong adhesion, and high temperature and humidity resistance.
The technical scheme is as follows:
a PU matte white finish is prepared from a component A, a component B and a component C according to the mass ratio of 1: 0.5-0.6: 0.5-0.7:
the component A comprises the following raw materials in percentage by weight:
the component B comprises the following raw materials in percentage by weight:
the raw materials of the third component comprise the following components in percentage by weight:
345 to 60 percent of n-butyl acetate
235 to 45 percent of propylene glycol methyl ether acetate
15 to 10 percent of dimethylbenzene;
the viscosity of the lauric acid alkyd resin is 12S to 15S of the Grignard pipe, the hydroxyl value is 110mgKOH/g to 130mgKOH/g, and the acid value is 10mgKOH/g to 12 mgKOH/g.
The invention also provides a preparation method of the PU matte white finish, which comprises the following steps:
(1) preparation of the component A: selecting a clean dispersion cylinder meeting the standard, sequentially adding lauric acid alkyd resin, a dispersing agent and an anti-settling agent, starting a dispersion machine, and dispersing at a low speed of 300-500 revolutions per minute for 5-10 minutes; then, sequentially adding titanium dioxide, a delustering agent, a flatting agent, a defoaming agent and n-butyl acetate 1 under stirring, and dispersing at a high speed of 800-1200 r/min for 10-20 min until the fineness is less than or equal to 30 um; finally, adding propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8000 +/-1500 mpa.s/25 ℃;
(2) preparation of the component B: after n-butyl acetate 2, TDI trimer curing agent, TDI prepolymer and HDI trimer curing agent materials are sequentially added, starting a dispersion machine, and dispersing for 30 minutes at 600-800 rpm;
(3) preparation of the third component: after the n-butyl acetate 3, the propylene glycol methyl ether acetate 2 and the xylene 1 are sequentially added, starting a dispersion machine to disperse for 15 minutes at 600-800 rpm.
The invention principle and the beneficial effects are as follows:
the alkyd resin is a polymer formed by modifying and polycondensing polyol and polybasic acid by fatty acid or oil, and the lauric acid is used for modifying the alkyd resin, so that the obtained lauric acid alkyd resin has high hardness and good compactness, is not easy to soak by water, and cannot achieve the dryness, gloss, hardness and durability of the paint. The lauric acid alkyd resin is added into the finish paint, and after the lauric acid alkyd resin is crosslinked with the curing agent, the hardness is higher, the adherence is better, after the finish paint is coated, the high temperature and high humidity resistance is better, and the paint is particularly suitable for coating a protective layer on the surface of a skirting line material of a shower room.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A PU matte white finish is prepared from a component A, a component B and a component C according to the mass ratio of 1: 0.5-0.6: 0.5-0.7:
the component A comprises the following raw materials in percentage by weight:
the component B comprises the following raw materials in percentage by weight:
the raw materials of the third component comprise the following components in percentage by weight:
345 to 60 percent of n-butyl acetate
235 to 45 percent of propylene glycol methyl ether acetate
15 to 10 percent of dimethylbenzene;
the viscosity of the lauric acid alkyd resin is 12S to 15S of the Grignard pipe, the hydroxyl value is 110mgKOH/g to 130mgKOH/g, and the acid value is 10mgKOH/g to 12 mgKOH/g.
In the invention, the component B is a curing agent component, and the component C is a diluent component.
The alkyd resin is a polymer formed by modifying and polycondensing polyol and polybasic acid by fatty acid or oil, and the lauric acid is used for modifying the alkyd resin, so that the obtained lauric acid alkyd resin has high hardness and good compactness, is not easy to soak by water, and cannot achieve the dryness, gloss, hardness and durability of the paint. The lauric acid alkyd resin is added into the finish paint, and after the lauric acid alkyd resin is crosslinked with the curing agent, the hardness is higher, the adherence is better, after the finish paint is coated, the high temperature and high humidity resistance is better, and the paint is particularly suitable for coating a protective layer on the surface of a skirting line material of a shower room.
The component A comprises 40-60% of lauric acid alkyd resin, preferably 45-55% of lauric acid alkyd resin, and further preferably 53% of lauric acid alkyd resin. The viscosity of the lauric acid alkyd resin is 12S to 15S of the Grignard pipe, the hydroxyl value is 110mgKOH/g to 130mgKOH/g, and the acid value is 10mgKOH/g to 12 mgKOH/g.
The lauric acid alkyd resin is H32-70J and is purchased from Shanghai Jia Bao Li paint GmbH; or the lauric acid alkyd resin is H139B-70 and is purchased from Shanghai Jia Bao Li paint Co.
The raw material of the component A also comprises 25 to 38 mass percent of titanium dioxide, preferably 28 to 35 mass percent of titanium dioxide, and further preferably 33 mass percent of titanium dioxide. The titanium dioxide provides tinting strength of the paint, is weather-resistant and is not easy to yellow. The titanium dioxide model is 706 rutile titanium dioxide, and is purchased from DuPont company.
The component A also comprises a certain amount of auxiliary agents and solvents, wherein the auxiliary agents comprise dispersing agents, anti-settling slurry, flatting agents and defoaming agents, and the solvents comprise n-butyl acetate 1 and propylene glycol methyl ether acetate 1.
The mass percentage of the dispersant is 0.5-2%, preferably 0.6-2%, and more preferably 1%; the dispersant was model BYK110, available from BYK, Germany.
The mass percentage of the flatting agent is 0.5-2%, preferably 0.6-2%, and more preferably 0.6%; the leveling agent is BYK333, and is purchased from BYK company of Germany.
The mass percent of the flatting agent is 3-6%, preferably 4-5%, and more preferably 5%; the matting agent was model number Xinhui BS-20, available from Grace corporation.
The mass percent of the defoaming agent is 0.5-2%, preferably 0.6-2%, and more preferably 0.6%; model number BYK141, available from BYK, Germany.
The anti-settling slurry can play a role in preventing sagging and preventing titanium dioxide from settling during paint construction, and the mass percentage of the anti-settling slurry is 3% -6%, preferably 3% -5%, and further preferably 4%; the anti-settling slurry comprises the following raw materials in percentage by weight:
20 percent of polyamide wax
280% of dimethylbenzene;
the preparation method of the anti-settling slurry comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding polyamide wax and xylene 2, and starting a dispersion machine to disperse for 15-20 minutes at 600-800 rpm.
The present invention is not particularly limited with respect to the types of the polyamide wax and xylene 2.
The n-butyl acetate 1 and the propylene glycol monomethyl ether acetate 1 can adjust the viscosity of the paint and the fluidity and the penetrability of a formed film. The mass percentage of the n-butyl acetate 1 is 1-3%, preferably 1-2%, and more preferably 1.8%; the propylene glycol monomethyl ether acetate 1 is 0.5 to 3 mass%, preferably 0.8 to 2 mass%, and more preferably 1 mass%. The invention has no special limitation on the types of the n-butyl acetate 1 and the propylene glycol methyl ether acetate 1.
The raw material of the component B comprises 40-60% of n-butyl acetate 2 by mass percentage, preferably 45-55% of n-butyl acetate 2 by mass percentage, and more preferably 50% of n-butyl acetate 2 by mass percentage. The invention has no special limitation on the type of the n-butyl acetate 2.
The component B of the invention also comprises 10 to 20 mass percent of TDI trimer curing agent, preferably 15 to 20 mass percent of TDI trimer curing agent, and more preferably 15 mass percent of TDI trimer curing agent. The TDI trimer curing agent is IL1451, and is available from Bayer materials science and technology Co.
The raw material of the component B also comprises 15-30% of TDI prepolymer by mass percent, preferably 15-25% of TDI prepolymer by mass percent, and more preferably 21% of TDI prepolymer by mass percent. The TDI prepolymer curing agent is L75, and is available from Bayer materials science and technology Limited.
The component B of the invention also comprises HDI trimer curing agent with the mass percent of 10-20%, preferably HDI trimer curing agent with the mass percent of 10-15%, and further preferably HDI trimer curing agent with the mass percent of 14%. The HDI trimer curing agent is HT-100, and is purchased from Wanhua chemical group, Inc.
The curing agent has the functions of increasing the drying speed, increasing the solid content balance drying speed and improving the yellowing resistance.
The raw material of the C component comprises 45-60% of n-butyl acetate 3 by mass percentage, preferably 48-55% of n-butyl acetate 3 by mass percentage, and more preferably 52% of n-butyl acetate 3 by mass percentage. The invention has no special limitation on the type of the n-butyl acetate 3.
The raw material of the propylene component also comprises 35-45% of propylene glycol methyl ether acetate 2 by mass percentage, preferably 38-42% of propylene glycol methyl ether acetate 2 by mass percentage, and further preferably 38% of propylene glycol methyl ether acetate 2 by mass percentage. The invention has no special limitation on the type of the propylene glycol methyl ether acetate 2.
The raw material of the C component also comprises 5-10% of dimethylbenzene 1 by mass percent, and the invention has no special limitation on the type of the dimethylbenzene 1.
The invention also provides a preparation method of the PU matte white finish, which comprises the following steps:
(1) preparation of the component A: selecting a clean dispersion cylinder meeting the standard, sequentially adding the lauric acid alkyd resin, the dispersing agent and the anti-settling agent, starting a dispersion machine, and dispersing at a low speed of 300-500 revolutions per minute for 5-10 minutes; then, sequentially adding titanium dioxide, a delustering agent, a flatting agent, a defoaming agent and n-butyl acetate 1 under stirring, and dispersing at a high speed of 800-1200 r/min for 10-20 min until the fineness is less than or equal to 30 um; finally, adding propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8000 +/-1500 mpa.s/25 ℃;
(2) preparation of the component B: after the n-butyl acetate 2, the TDI trimer curing agent, the TDI prepolymer and the HDI trimer curing agent are sequentially added, starting a dispersion machine to disperse for 30 minutes at 600-800 r/min;
(3) preparation of the third component: and (3) after the n-butyl acetate 3, the propylene glycol methyl ether acetate 2 and the xylene 1 are sequentially added, starting a dispersion machine, and dispersing for 15 minutes at 600-800 r/min.
In order to further understand the present invention, the polyether modified polyurethane curing agent and the preparation method thereof provided by the present invention are specifically described below with reference to the examples.
Unless otherwise specified, all starting materials below are commercial technical grade materials.
Example 1
The embodiment provides a PU matte white finish, which is prepared from a component A, a component B and a component C according to the mass ratio of 1:0.5:
the component A comprises the following raw materials in percentage by weight:
the viscosity of the H32-70J lauric acid alkyd resin is 12S-15S of the Grignard tube, the hydroxyl value is 110 mgKOH/g-130 mgKOH/g, and the acid value is 10 mgKOH/g-12 mgKOH/g.
The preparation method of the component A comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding H32-70J lauric acid alkyd resin, a dispersing agent and an anti-settling agent, starting a dispersion machine, and dispersing at a low speed of 300-500 r/min for 5-10 min; then adding rutile titanium dioxide, a delustering agent, a flatting agent, a defoaming agent and n-butyl acetate 1 in sequence under stirring, and dispersing at a high speed of 800-1200 rpm for 10-20 minutes until the fineness is less than or equal to 30 um; finally, adding propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8500mpa.s/25 ℃.
The component B comprises the following raw materials in percentage by weight:
the preparation method of the component B comprises the following steps: after n-butyl acetate 2, TDI trimer curing agent, TDI prepolymer and HDI trimer curing agent materials are sequentially added, a dispersion machine is started to disperse for 30 minutes at 600-800 rpm.
The component C comprises the following raw materials in percentage by weight:
350 percent of n-butyl acetate
Propylene glycol methyl ether acetate 242%
18% of dimethylbenzene;
the preparation method of the third component comprises the following steps: after the n-butyl acetate 3, the propylene glycol methyl ether acetate 2 and the xylene 1 are sequentially added, starting a dispersion machine to disperse for 15 minutes at 600-800 rpm.
The anti-settling slurry comprises the following raw materials in percentage by weight:
20 percent of polyamide wax
280% of dimethylbenzene;
the preparation method of the anti-settling slurry comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding polyamide wax and xylene 2, and starting a dispersion machine to disperse for 15-20 minutes at 600-800 rpm.
Example 2
The embodiment provides a PU matte white finish, which is prepared from a component A, a component B and a component C according to the mass ratio of 1:0.5:
the component A comprises the following raw materials in percentage by weight:
the viscosity of the H32-70J lauric acid alkyd resin is 12S-15S of the Grignard tube, the hydroxyl value is 110 mgKOH/g-130 mgKOH/g, and the acid value is 10 mgKOH/g-12 mgKOH/g.
The preparation method of the component A comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding H32-70J lauric acid alkyd resin, a dispersing agent and an anti-settling agent, starting a dispersion machine, and dispersing at a low speed of 300-500 r/min for 5-10 min; then adding rutile titanium dioxide, a delustering agent, a flatting agent, a defoaming agent and n-butyl acetate 1 in sequence under stirring, and dispersing at a high speed of 800-1200 rpm for 10-20 minutes until the fineness is less than or equal to 30 um; finally, adding propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8500mpa.s/25 ℃;
the component B comprises the following raw materials in percentage by weight:
the preparation method of the component B comprises the following steps: after n-butyl acetate 2, TDI trimer curing agent, TDI prepolymer and HDI trimer curing agent materials are sequentially added, a dispersion machine is started to disperse for 30 minutes at 600-800 rpm.
The component C comprises the following raw materials in percentage by weight:
352 percent of n-butyl acetate
Propylene glycol methyl ether acetate 238%
110% of dimethylbenzene;
the preparation method of the third component comprises the following steps: after the n-butyl acetate 3, the propylene glycol methyl ether acetate 2 and the xylene 1 are sequentially added, starting a dispersion machine to disperse for 15 minutes at 600-800 rpm.
The anti-settling slurry comprises the following raw materials in percentage by weight:
20 percent of polyamide wax
280% of dimethylbenzene;
the preparation method of the anti-settling slurry comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding polyamide wax and xylene 2, and starting a dispersion machine to disperse for 15-20 minutes at 600-800 rpm.
Example 3
The embodiment provides a PU matte white finish, which is prepared from a component A, a component B and a component C according to the mass ratio of 1:0.6: 0.5:
the component A comprises the following raw materials in percentage by weight:
the viscosity of the H139B-70 lauric acid alkyd resin is 12S-15S of the Grignard tube, the hydroxyl value is 110 mgKOH/g-130 mgKOH/g, and the acid value is 10 mgKOH/g-12 mgKOH/g.
The preparation method of the component A comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding H139B-70 lauric acid alkyd resin, a dispersing agent and an anti-settling agent, starting a dispersion machine, and dispersing at a low speed of 300-500 r/min for 5-10 minutes; then adding rutile titanium dioxide, a delustering agent, a flatting agent, a defoaming agent and n-butyl acetate 1 in sequence under stirring, and dispersing at a high speed of 800-1200 rpm for 10-20 minutes until the fineness is less than or equal to 30 um; finally, adding propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8000mpa.s/25 ℃.
The component B comprises the following raw materials in percentage by weight:
the preparation method of the component B comprises the following steps: after n-butyl acetate 2, TDI trimer curing agent, TDI prepolymer and HDI trimer curing agent materials are sequentially added, a dispersion machine is started to disperse for 30 minutes at 600-800 rpm.
The component C comprises the following raw materials in percentage by weight:
350 percent of n-butyl acetate
Propylene glycol methyl ether acetate 240%
110% of dimethylbenzene;
the preparation method of the third component comprises the following steps: after the n-butyl acetate 3, the propylene glycol methyl ether acetate 2 and the xylene 1 are sequentially added, starting a dispersion machine to disperse for 15 minutes at 600-800 rpm.
The anti-settling slurry comprises the following raw materials in percentage by weight:
20 percent of polyamide wax
280% of dimethylbenzene;
the preparation method of the anti-settling slurry comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding polyamide wax and xylene 2, and starting a dispersion machine to disperse for 15-20 minutes at 600-800 rpm.
Example 4
The embodiment provides a PU matte white finish, which is prepared from a component A, a component B and a component C according to the mass ratio of 1:0.5: 0.6:
the component A comprises the following raw materials in percentage by weight:
the viscosity of the H32-70J lauric acid alkyd resin is 12S-15S of the Grignard tube, the hydroxyl value is 110 mgKOH/g-130 mgKOH/g, and the acid value is 10 mgKOH/g-12 mgKOH/g.
The preparation method of the component A comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding H32-70J lauric acid alkyd resin, a dispersing agent and an anti-settling agent, starting a dispersion machine, and dispersing at a low speed of 300-500 r/min for 5-10 min; then adding rutile titanium dioxide, a delustering agent, a flatting agent, a defoaming agent and n-butyl acetate 1 in sequence under stirring, and dispersing at a high speed of 800-1200 rpm for 10-20 minutes until the fineness is less than or equal to 30 um; finally, adding propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8000mpa.s/25 ℃.
The component B comprises the following raw materials in percentage by weight:
the preparation method of the component B comprises the following steps: after n-butyl acetate 2, TDI trimer curing agent, TDI prepolymer and HDI trimer curing agent materials are sequentially added, a dispersion machine is started to disperse for 30 minutes at 600-800 rpm.
The component C comprises the following raw materials in percentage by weight:
345 percent of n-butyl acetate
Propylene glycol methyl ether acetate 245%
110% of dimethylbenzene;
the preparation method of the third component comprises the following steps: after the n-butyl acetate 3, the propylene glycol methyl ether acetate 2 and the xylene 1 are sequentially added, starting a dispersion machine to disperse for 15 minutes at 600-800 rpm.
The anti-settling slurry comprises the following raw materials in percentage by weight:
20 percent of polyamide wax
280% of dimethylbenzene;
the preparation method of the anti-settling slurry comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding polyamide wax and xylene 2, and starting a dispersion machine to disperse for 15-20 minutes at 600-800 rpm.
Comparative example 1
The comparative example provides a PU matte white finish, which is prepared from a component A, a component B and a component C according to the mass ratio of 1:0.5:
the component A comprises the following raw materials in percentage by weight:
the viscosity of the H32-70J lauric acid alkyd resin is 12S-15S of the Grignard tube, the hydroxyl value is 110 mgKOH/g-130 mgKOH/g, and the acid value is 10 mgKOH/g-12 mgKOH/g.
The preparation method of the component A comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding H32-70J lauric acid alkyd resin, a dispersing agent and an anti-settling agent, starting a dispersion machine, and dispersing at a low speed of 300-500 r/min for 5-10 min; then adding rutile titanium dioxide, a delustering agent, a flatting agent, a defoaming agent and n-butyl acetate 1 in sequence under stirring, and dispersing at a high speed of 800-1200 rpm for 10-20 minutes until the fineness is less than or equal to 30 um; finally, adding propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8500mpa.s/25 ℃.
The component B comprises the following raw materials in percentage by weight:
the preparation method of the component B comprises the following steps: after n-butyl acetate 2, TDI trimer curing agent, TDI prepolymer and HDI trimer curing agent materials are sequentially added, a dispersion machine is started to disperse for 30 minutes at 600-800 rpm.
The component C comprises the following raw materials in percentage by weight:
350 percent of n-butyl acetate
Propylene glycol methyl ether acetate 240%
110% of dimethylbenzene;
the preparation method of the third component comprises the following steps: after the n-butyl acetate 3, the propylene glycol methyl ether acetate 2 and the xylene 1 are sequentially added, starting a dispersion machine to disperse for 15 minutes at 600-800 rpm.
The anti-settling slurry comprises the following raw materials in percentage by weight:
20 percent of polyamide wax
280% of dimethylbenzene;
the preparation method of the anti-settling slurry comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding polyamide wax and xylene 2, and starting a dispersion machine to disperse for 15-20 minutes at 600-800 rpm.
Comparative example 2
The product prepared by the invention is taken as one of the common alkyd resins in the market, namely YP32-70 type alkyd resin of Shanghai Yuanbang chemical company Limited to replace H32-70J lauric acid alkyd resin, and the other conditions are consistent with those of the example 1, and a performance comparison experiment is carried out.
Comparative example 3
The product prepared by the invention and one of the alkyd resins commonly used in the market, namely Changxing chemical industry Co., Ltd 3307-X-70 type alkyd resin is used for replacing H32-70J lauric acid alkyd resin, and the other conditions are the same as those in example 2, and a performance comparison experiment is carried out.
Example 5
The A components of examples 1-4 and comparative example 1 were tested for performance, as shown in Table 1:
TABLE 1
| Detecting items | Technical index | The method of measurement is based on |
| Colour(s) | White colour | Visual inspection of |
| Appearance and transparency | Clear and transparent without suspended substances | GB/T1721 |
| Water content | Without turbidity | GB/5209-1985 |
The results are shown in table 2:
TABLE 2
Example 6
The B component (curing agent) in examples 1-4 and comparative example 1 was tested for performance, as shown in Table 3:
TABLE 3
| Detecting items | Technical index | The method of measurement is based on |
| Color (Fe-Co) number | ≤1 | GB9761 |
| Appearance and transparency | Clear and transparent without suspended substances | GB/T1721 |
| Solid content% | ≤40 | GB/T1725-2007 |
| Water content | Without turbidity | GB/5209-1985 |
The results are shown in table 4:
TABLE 4
Example 7
The propylene components (diluents) of examples 1-4 and comparative example 1 were tested for performance as shown in Table 5:
TABLE 5
| Detecting items | Technical index | The method of measurement is based on |
| Color (Fe-Co) number | ≤1 | GB9761 |
| Appearance and transparency | Clear and transparent without suspended substances | GB/T1721 |
| Water content | Without turbidity | GB/5209-1985 |
The results are shown in Table 6:
TABLE 6
Example 8
The performance tests were performed on the topcoats of examples 1-4 and comparative examples 1-3, and the test methods are shown in table 7:
TABLE 7
Remarking:
60 ℃ water cooking for 48h experiment: using a spray gun with the diameter of 1.5, coating two crossed parts on a PE forming skirting line substrate until a film forming material is uniform, after drying for 24 hours, putting the PE forming skirting line substrate into a water bath kettle, boiling the PE forming skirting line substrate for 48 hours at the temperature of 60 ℃, and requiring that the surface of a coating film is not bubbled and does not fall off.
The test results are shown in table 8:
TABLE 8
As can be seen from the data in Table 8, the PU matte white finish obtained by adding lauric acid alkyd resin into the component A in the embodiments 1 to 4, adjusting the proportion of each component in the component A, and controlling the weight ratio of the component A, the component B and the component C to be 1: 0.5-0.6: 0.5-0.7 during paint mixing has the advantages of good coating adhesion, high covering power, good hand feeling, good weather resistance, low odor, stable gloss, good leveling property during construction and easy spraying. From the 60 ℃ water boiling 48h experiment, it can be known that, two 'ten's are coated on the PE forming skirting line substrate by using a spray gun with a diameter of 1.5 until the film forming matter is uniform, and after the film is dried for 24 hours, the PE forming skirting line substrate enters a water bath kettle to be boiled in water with a temperature of 60 ℃ for 48h, the film surfaces of the films of the examples 1-4 do not bubble or fall off, while the films of the comparative examples 1-3 obviously bubble or fall off, and the paint can be removed by touching with a fingernail. According to the comparison example 1, if the proportion of each component in the component A is not reasonably regulated, the obtained PU matte white finish has poor adhesive force, and the index can not meet the standard requirement. Combining the comparative example 2 and the comparative example 3, it can be known that the PU matte white finish prepared from the Yuanbang alkyd resin and the Changxing alkyd resin cannot meet the requirements after the PU matte white finish is boiled in water at 60 ℃ in a water bath kettle for 48 hours, and then a paint film is delaminated and bubbled. The data fully show that the components in the formula of the PU matte white finish paint are matched with each other and have a synergistic effect, and the PU matte white finish paint obtained by adopting the formula of the invention has the advantages of good coating adhesion, high covering power, good hand feeling, good weather resistance, low odor, stable gloss, good leveling property during construction and easy spraying, can meet the performance requirements of maintaining the paint film from delaminating, bubbling and losing gloss in high-humidity environments such as a shower room for a long time, and plays a good role in protecting and decorating skirting lines.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. The PU matte white finish is characterized by being prepared from a component A, a component B and a component C according to the mass ratio of 1: 0.5-0.6: 0.5-0.7:
the component A comprises the following raw materials in percentage by weight:
the component B comprises the following raw materials in percentage by weight:
the raw materials of the third component comprise the following components in percentage by weight:
345 to 60 percent of n-butyl acetate
235 to 45 percent of propylene glycol methyl ether acetate
15 to 10 percent of dimethylbenzene;
the viscosity of the lauric acid alkyd resin is 12S to 15S of the Grignard pipe, the hydroxyl value is 110mgKOH/g to 130mgKOH/g, and the acid value is 10mgKOH/g to 12 mgKOH/g.
2. The PU matte white finish according to claim 1, which is prepared from the components A, B and C according to the mass ratio of 1: 0.5-0.6:
the component A comprises the following raw materials in percentage by weight:
the component B comprises the following raw materials in percentage by weight:
the raw materials of the third component comprise the following components in percentage by weight:
348 to 55 percent of n-butyl acetate
238 to 42 percent of propylene glycol methyl ether acetate
15 to 10 percent of dimethylbenzene.
3. The PU matte white finish according to claim 1, wherein the lauric alkyd is H32-70J.
4. The PU matte white finish according to any one of claims 1 to 3, wherein the dispersant is BYK 110.
5. The PU matte white finish according to any one of claims 1 to 3, wherein the leveling agent is BYK 333.
6. The PU matte white finish according to any one of claims 1 to 3, wherein the matting agent grid is Xinhui BS-20.
7. The PU matte white finish according to any one of claims 1 to 3, wherein the defoamer is BYK 141.
8. The PU matte white finish according to any one of claims 1 to 3, wherein the TDI trimer curing agent, the TDI prepolymer and the HDI trimer curing agent are Bayer IL1451, Bayer L75 and HT-100 respectively.
9. The PU matte white finish according to any one of claims 1 to 3, wherein the raw materials of the anti-settling slurry comprise the following components in percentage by weight:
20 percent of polyamide wax
280% of dimethylbenzene;
the preparation method of the anti-settling slurry comprises the following steps: selecting a clean dispersion cylinder meeting the standard, sequentially adding polyamide wax and xylene 2, and starting a dispersion machine to disperse for 15-20 minutes at 600-800 rpm.
10. The PU matte white finish according to claim 1, which is prepared from components A, B and C in a mass ratio of 1:0.5:
the component A comprises the following raw materials in percentage by weight:
the component B comprises the following raw materials in percentage by weight:
the raw materials of the third component comprise the following components in percentage by weight:
352 percent of n-butyl acetate
Propylene glycol methyl ether acetate 238%
And (3) 110% of dimethylbenzene.
11. A method for preparing a PU matte white finish according to any of claims 1 to 10, comprising the steps of:
(1) preparation of the component A: selecting a clean dispersion cylinder meeting the standard, sequentially adding the lauric acid alkyd resin, the dispersing agent and the anti-settling agent, starting a dispersion machine, and dispersing at a low speed of 300-500 revolutions per minute for 5-10 minutes; then, sequentially adding titanium dioxide, a delustering agent, a flatting agent, a defoaming agent and n-butyl acetate 1 under stirring, and dispersing at a high speed of 800-1200 r/min for 10-20 min until the fineness is less than or equal to 30 um; finally, adding propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8000 +/-1500 mpa.s/25 ℃;
(2) preparation of the component B: after the n-butyl acetate 2, the TDI trimer curing agent, the TDI prepolymer and the HDI trimer curing agent are sequentially added, starting a dispersion machine to disperse for 30 minutes at 600-800 r/min;
(3) preparation of the third component: and (3) after the n-butyl acetate 3, the propylene glycol methyl ether acetate 2 and the xylene 1 are sequentially added, starting a dispersion machine, and dispersing for 15 minutes at 600-800 r/min.
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