CN115093783A - Ultra-matte thin transparent matte top-coat for solid wood furniture and preparation method thereof - Google Patents
Ultra-matte thin transparent matte top-coat for solid wood furniture and preparation method thereof Download PDFInfo
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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
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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
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- 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
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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Abstract
The invention belongs to the technical field of chemical coatings, and particularly relates to an ultra-matte thin transparent matte top-coat paint for solid wood furniture and a preparation method thereof. The raw materials for preparing the matte top-coat paint consist of a component A, a component B and a component C, wherein: the component A comprises self-extinction hydroxyl acrylic resin and cellulose acetate butyrate; the component B comprises an HDI type curing agent; the component C is a solvent. The self-extinction hydroxyl acrylic resin is used as a main agent component, and the extinction powder is not required to be added, so that the purposes of extinction and film forming can be achieved, the high transparency of a paint film is ensured, and a macromolecular material cellulose acetate butyrate is added to facilitate the spreading of the paint film; the self-dulling hydroxyl acrylic resin can react with-NCO of the HDI type curing agent polyisocyanate due to the hydroxyl group to form a very dull paint film, so that the glossiness is lower than 3 degrees. The macromolecular cellulose acetate butyrate enables a paint film to be thinner and softer, and the glossiness is uniform no matter seen from the plane or the side, so that the effects of thinness, extreme dumb and transparency are achieved.
Description
Technical Field
The invention belongs to the technical field of chemical coatings, and particularly relates to an ultra-matte thin transparent matte top-coat paint for solid wood furniture and a preparation method thereof.
Background
With the continuous improvement of the external open level and the living standard of people, the demand on high-end solid wood furniture is also continuously increased. The high-end solid wood is a precious material, has beautiful texture and soft visual effect, and how to deeply dig the value is constantly pursued by researchers, and the solid wood has the defects of easy water absorption, no dirt resistance, easy mildew, aging, color change and the like when meeting moisture. Common solid wood furniture mainly gives attention to protection and practical effects, and high-end solid wood furniture requires protection and practical effects and pursues an attractive effect. Therefore, the effects of being extremely dumb (the glossiness is lower than 3 degrees), thin and transparent are produced. The paint film is thin, transparent and extremely flat, is like no film when the paint film is coated with the film, can fully show the original taste and flavor of wood, and brings natural comfort to people. The extreme gloss and the thinning of a paint film are contradictory properties, and in general, the lower the gloss (matte), the poorer the transparency.
The traditional extinction method is to add extinction powder, the common extinction powder is fumed silica, but the refractive index difference between the fumed silica and the matrix resin is large, the compatibility is not good, and the transparency is influenced. Therefore, only by adding the matting agent, the effect that the glossiness is lower than 3 ° and the transparency cannot be achieved. In addition, the common polyurethane matte varnish solid wood furniture has the defects of uneven gloss, floating and the like when viewed from the side.
Therefore, the development of a solid wood top-coat paint which can simultaneously realize thin, transparent and extremely matte effects and has uniform glossiness and no defect of floating is urgently needed.
Disclosure of Invention
The invention aims to solve at least one of the technical problems of the prior art that the prior clear finish cannot simultaneously achieve the effects of thinness and extreme dumb, and uneven luster and floating caused by the extinction of fumed silica. Therefore, the matte top-coat paint for solid wood furniture provided by the invention not only has good adhesive force, flexibility, hardness, leveling property, chemical resistance, durability and the like of polyurethane matte top-coat paint, but also solves the contradiction between extreme matte property and thin transparency. The paint film prepared by the invention has the characteristics of thinness, high permeability and extreme dumb, is like a film without a film, can fully show the original taste and flavor of solid wood, gives people natural comfort, is softer, and has very uniform glossiness no matter seen from the plane or the side.
In a first aspect, the invention provides a matte varnish.
The matte clear finish paint is prepared from a component A, a component B and a component C, wherein the component A comprises self-extinction hydroxy acrylic resin and cellulose acetate butyrate; the component B comprises an HDI type curing agent; the component C is a solvent.
The self-extinction hydroxyl acrylic resin is used as a main agent component, the extinction powder is not required to be added, the purposes of extinction and film forming can be achieved, and meanwhile, the macromolecular material cellulose acetate butyrate is added, so that the paint film is favorably spread; by adopting the HDI type curing agent, the self-extinction hydroxyl acrylic resin can react with-NCO of the HDI type curing agent polyisocyanate due to the hydroxyl group to form a very dumb paint film, so that the glossiness is lower than 3 degrees. The main agent component of the invention does not contain matting powder, which ensures the high transparency of the paint film, and the auxiliary macromolecule cellulose acetate butyrate also contains hydroxyl which can react with-NCO of HDI type curing agent polyisocyanate, so that the paint film is thinner and softer, and the glossiness is uniform no matter seen from the plane or the side, thereby achieving the effects of thinness, extreme dullness and transparency. In addition, the reaction of the extinction hydroxy acrylic resin, the macromolecular cellulose acetate butyrate and the HDI type curing agent provides good adhesion, flexibility, high hardness, chemical resistance and durability for a paint film.
As a further improvement of the above scheme, the mass ratio of the component a, the component B and the component C is 1: (0.2-0.3): (1-1.5).
Preferably, the mass ratio of the component A, the component B and the component C is 1: 0.25: (1-1.5).
Specifically, by adjusting the component A, the component B and the component C within a proper range, the thin and transparent effect and the extremely-matte effect can be simultaneously achieved on the premise that a paint film has the same basic performance of the polyurethane matte clear finish.
As a further improvement of the scheme, the particle size of the self-extinction hydroxyl acrylic resin is 5-15 μm.
Specifically, the particle size of the self-extinction hydroxy acrylic resin is controlled to be in a micron level, the micron-level particles are uniformly distributed in a paint film and act like extinction powder, after the film is formed, the surface is uneven to form diffuse reflection, the extinction effect is achieved, and an extremely-matte coating is formed; the particle size of the common hydroxyl acrylic resin is nano-scale, and the extinction effect cannot be realized.
Preferably, the self-extinction hydroxyl acrylic resin has the non-volatile part of 48-52 wt%, the viscosity of 4000-10000Cp at 25 +/-1 ℃, the acid value of 15-35mg KOH/g and the hydroxyl value of 35-40mg KOH/g.
More preferably, the self-extinction hydroxy acrylic resin is selected from H-MT-2350 of Hamming corporation.
As a further improvement of the above scheme, the cellulose acetate butyrate has the content of an acetate group of 12.5-14.5 wt%, the content of a butyrate group of 37-39 wt%, the content of a hydroxyl group of 1.2-1.4%, the viscosity of 7.5-7.7poise and the average molecular weight of 35000-45000. The above-mentioned characteristics of cellulose acetate butyrate can make the paint film thinner and smoother.
As a further improvement of the scheme, the component A also comprises at least one of a dispersant, an anti-settling agent, propylene glycol methyl ether acetate, wax powder, a leveling agent, a drier, a defoaming agent and butyl acetate.
Preferably, the component A comprises the following components in parts by weight:
as a further improvement of the scheme, the cellulose acetate butyrate solution comprises the following components in parts by weight:
preferably, the cellulose acetate butyrate is selected from CAB381-2 from Istman.
As a further improvement of the scheme, the anti-settling slurry comprises the following components in parts by weight:
65-75 parts of dimethylbenzene;
25-35 parts of an anti-settling agent.
Specifically, wax powders are used to provide better hand feel; the leveling agent enables a paint film to be smoother and to have better hand feeling; the anti-settling agent ensures that the wax powder and the self-extinction hydroxyl acrylic resin do not generate sediment in the storage and use processes; the defoaming agent can be used for defoaming more quickly in the preparation and use processes; the drier is used for promoting actual drying; the solvent can adjust the viscosity and the volatilization rate, and is convenient for processing, using, leveling, adjusting the drying time and the like; the dispersing agent is beneficial to dispersing all raw materials and does not agglomerate. The component A is matched with an HDI curing agent and a solvent in a specific ratio, and is sprayed on solid wood furniture according to a process, so that the solid wood furniture has the properties of good adhesive force, good flexibility and resistance, high hardness, good leveling property, good chemical resistance, durability and the like, and has the characteristics of thinness, transparency and extreme dumb.
Preferably, the dispersant is a modified polyurethane dispersant; more preferably, the dispersant is selected from EFKA 4010.
Preferably, the anti-settling agent is a polyamide wax anti-settling agent; more preferably, the anti-settling agent is selected from 6900-20X of Disparlon corporation.
Preferably, the wax powder is modified polyethylene wax powder; more preferably, the wax powder is selected from 1400SF of Lubrizol corporation.
Preferably, the leveling agent is an organic silicon leveling agent; more preferably, the leveling agent is selected from BYK333 of BYK, germany.
Preferably, the drier is an organic tin drier; more preferably, the drier is selected from T-12 of gas company, USA.
Preferably, the defoaming agent is an organic silicon defoaming agent; more preferably, the antifoaming agent is selected from BYK141, BYK, germany.
As a further improvement of the scheme, the component B also comprises propylene glycol monomethyl ether acetate and/or butyl acetate.
Preferably, the component B comprises the following components in parts by weight:
5-15 parts of propylene glycol methyl ether acetate;
35-55 parts of butyl acetate;
35-45 parts of HDI type curing agent.
Preferably, the HDI type curing agent is aliphatic polyisocyanate containing hexamethylene diisocyanate trimer; more preferably, the HDI-type curing agent is selected from N3390 of korscow.
As a further improvement of the scheme, the component C comprises the following components in parts by weight:
the invention provides a preparation method of a matte top-coat paint.
Specifically, the preparation method of the matte top-coat paint is used for preparing the matte top-coat paint, and comprises the following steps:
(1) dispersing self-extinction hydroxyl acrylic resin, adding other raw materials for preparing the component A, and mixing to obtain the component A;
(2) and (2) adding the component B and the component C into the component A prepared in the step (1) and mixing to obtain the matte top-coat paint.
The self-extinction hydroxyl acrylic resin is in a gel state, has high viscosity and is difficult to disperse, so the self-extinction hydroxyl acrylic resin needs to be fully dispersed first until the self-extinction hydroxyl acrylic resin is dispersed to the particle size of 5-15 mu m, other raw materials for preparing the component A, such as wax powder, can not be added, otherwise, the wax powder cannot be dispersed, the self-extinction hydroxyl acrylic resin cannot be uniformly dispersed, and a paint film is full of large and small particles, so that the effect of thinness cannot be achieved.
As a further improvement of the above scheme, the preparation method of the a component comprises the following steps:
(1) putting self-extinction hydroxyl acrylic resin, a dispersing agent and part of propylene glycol methyl ether acetate into a paint making cylinder, and dispersing at a low speed (the rotating speed is 600-800 r/min) for 5-10 minutes;
(2) slowly adding wax powder under the condition of low-speed dispersion, and adopting high-speed dispersion of 1000-1300 rpm for 20-30 min until the fineness is less than or equal to 30 mu m;
(3) slowly adding the anti-settling slurry, the cellulose acetate butyrate liquid, the flatting agent, the drier, the defoaming agent, the residual propylene glycol methyl ether acetate and butyl acetate under the condition of low-speed dispersion, dispersing for 5-10 minutes at the low speed of 800 revolutions per minute at the rotation speed of 600-plus-one, stopping dispersion, standing for 10-100 minutes, and obtaining the component A after defoaming.
Specifically, the solvent propylene glycol methyl ether acetate is added in twice, and the propylene glycol methyl ether acetate added in the step (1) is mainly used for dispersing self-extinction hydroxyl acrylic resin; and (3) adding propylene glycol methyl ether acetate in the step (3) to mainly adjust the viscosity and the volatilization rate.
Preferably, the mass ratio of the propylene glycol monomethyl ether acetate added in the step (1) to the propylene glycol monomethyl ether acetate added in the step (3) is (1-10): (1-15).
As a further improvement of the scheme, the preparation method of the cellulose acetate butyrate solution comprises the following steps:
(1) dispersing dimethylbenzene, butyl acetate and cyclohexanone at a low speed of 600-800 rpm for 5-10 minutes;
(2) slowly adding cellulose acetate butyrate under the condition of low-speed dispersion, and slowly dispersing for 5-10 minutes at a low speed until the cellulose acetate butyrate is completely dissolved to obtain the cellulose acetate butyrate liquid.
As a further improvement of the above scheme, the preparation method of the anti-settling slurry comprises the following steps: adding dimethylbenzene, slowly adding the anti-settling agent under low-speed dispersion, and dispersing for 5-10 minutes at a low speed of 600-800 rpm until the anti-settling agent is uniformly dispersed to obtain the anti-settling slurry.
As a further improvement of the above scheme, the preparation method of the B component comprises the following steps:
(1) putting propylene glycol methyl ether acetate, butyl acetate and HDI type curing agent into a special production cylinder for curing agent, and stirring at a low speed of 200-400 rpm for 10-15 minutes until the mixture is uniform;
(2) stopping stirring, standing for 5-10 minutes, sampling and detecting NCO (7-8 wt%) and solid content (33.5-35.5 wt%), and obtaining the component B after qualified.
As a further improvement of the above scheme, the preparation method of the component C comprises the following steps:
(1) putting dimethylbenzene, butyl acetate, cyclohexanone and propylene glycol methyl ether acetate into a special production cylinder for a solvent, and stirring at a low speed of 400 revolutions per minute at a rotation speed of 200-400 revolutions per minute for 10-15 minutes until the mixture is uniform;
(2) stopping stirring, standing for 5-10 minutes, sampling and detecting a chromatogram (for a standard sample), and obtaining the component C after the chromatogram is qualified.
The third aspect of the invention provides an application of a matte varnish.
In particular to application of the matte top-coat paint in the field of solid wood furniture.
Compared with the prior art, the technical scheme of the invention at least has the following technical effects or advantages:
(1) the matte top-coat paint consists of a component A, a component B and a component C, wherein: the component A is a main agent and comprises self-extinction hydroxyl acrylic resin and cellulose acetate butyrate; the component B is a curing agent, including an HDI type curing agent; the component C is a solvent. The self-extinction hydroxyl acrylic resin is used as a main agent component, the extinction and film forming purposes can be achieved without adding extinction powder, and meanwhile, a macromolecular material cellulose acetate butyrate is added, so that a paint film is favorably spread; the self-extinction hydroxyl acrylic resin can react with-NCO of HDI type curing agent polyisocyanate to form a very dumb paint film, so that the glossiness is lower than 3 degrees and can reach 1-2.5 degrees. Because no matting powder is included, the high transparency of a paint film is ensured, and then macromolecule cellulose acetate butyrate also contains hydroxyl, so that the paint film can react with-NCO of HDI type curing agent polyisocyanate, the paint film is thinner and softer, and the glossiness is uniform no matter seen from the plane or the side, thereby achieving the effects of thinness, extreme dullness and transparency.
(2) The self-extinction hydroxyl acrylic resin, the macromolecular cellulose acetate butyrate and the HDI type curing agent react to provide good adhesive force, flexibility, high hardness, chemical resistance and durability for a paint film, so that the defects of uneven luster and blooming caused by the fumed silica flatting powder are avoided, and the coated furniture is odorless, good in yellowing resistance, capable of meeting the requirements of high-end solid wood furniture and superior in performance to foreign similar products.
Detailed Description
The present invention is specifically described below with reference to examples in order to facilitate understanding of the present invention by those skilled in the art. It should be particularly noted that the examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as non-essential improvements and modifications to the invention may occur to those skilled in the art, which fall within the scope of the invention as defined by the appended claims. Meanwhile, the raw materials mentioned below are not specified in detail and are all commercial products; the process steps or preparation methods not mentioned in detail are all those known to the person skilled in the art.
The raw materials adopted in the examples and comparative examples of the invention are specifically selected from the following raw materials:
self-extinction hydroxyl acrylic resin: H-MT-2350 (average particle diameter of 10 μm, non-volatile content of 48-52 wt%, viscosity of 4000-10000Cp at 25 + -1 deg.C, acid value of 15-35mg KOH/g, hydroxyl value of 38.61mg KOH/g) from Hamins corporation;
dispersing agent: EFKA 4010;
anti-settling agent: disparlon corporation 6900-20X;
wax powder: 1400SF, Lubrizol corporation;
cellulose acetate butyrate: CAB381-2 from eastman corporation (13.5 wt% for acetate group, 38 wt% for butyrate group, 1.3% for hydroxyl group, 7.6poise for viscosity, 40000 for average molecular weight);
leveling agent: BYK333 of BYK, Germany;
a drier: t-12 from American gas company;
defoaming agent: BYK141, BYK, Germany;
HDI type curing agent: c. scientific N3390.
Example 1
A matte top-coat paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
cellulose acetate butyrate solution comprises the following components in parts by weight:
the anti-settling slurry comprises the following components in parts by weight:
70 parts of dimethylbenzene;
30 parts of anti-settling agent.
The component B comprises the following components in parts by weight:
12 parts of propylene glycol monomethyl ether acetate;
50 parts of butyl acetate;
and 38 parts of HDI type curing agent.
The component C comprises the following components in parts by weight:
a preparation method of matte top-coat paint comprises the following steps:
preparation of component A:
(1) putting self-extinction hydroxyl acrylic resin, a dispersing agent and part of propylene glycol monomethyl ether acetate (4 parts) into a paint making cylinder, and dispersing at a low speed (the rotating speed is 600 revolutions per minute) for 10 minutes;
(2) slowly adding wax powder under low-speed dispersion (the rotating speed is 600 revolutions per minute), and dispersing for 3 minutes at high speed of 1000 revolutions per minute until the fineness is less than or equal to 30 mu m;
(3) and (3) slowly adding the anti-settling pulp, the cellulose acetate butyrate liquid, the flatting agent, the drier, the defoaming agent, the remaining propylene glycol methyl ether acetate (6 parts) and butyl acetate under low-speed dispersion (the rotating speed is 600 revolutions per minute), dispersing for 10 minutes at a low speed of 600 revolutions per minute, stopping dispersing, standing for 30 minutes, and defoaming to obtain the component A.
Wherein: the preparation method of the cellulose acetate butyrate liquid comprises the following steps:
(1) dispersing dimethylbenzene, butyl acetate and cyclohexanone for 10 minutes at a low speed of 600 revolutions per minute;
(2) slowly adding cellulose acetate butyrate under the condition of low-speed dispersion (the rotating speed is 600 revolutions per minute), and dispersing for 10 minutes at a low speed until the cellulose acetate butyrate is completely dissolved to obtain cellulose acetate butyrate liquid.
The preparation method of the anti-settling slurry comprises the following steps: adding dimethylbenzene, slowly adding the anti-settling agent under low-speed dispersion (the rotating speed is 600 revolutions per minute), and dispersing for 10 minutes at the low speed of 600 revolutions per minute until the anti-settling agent is uniformly dispersed to obtain the anti-settling slurry.
Preparation of the component B:
(1) adding propylene glycol methyl ether acetate, butyl acetate and HDI type curing agent into a special production cylinder for curing agent, and stirring at a low speed of 200 r/min for 15 min until the mixture is uniform;
(2) stopping stirring, standing for 10 minutes, sampling and detecting NCO (7-8 wt%) and solid content (33.5-35.5 wt%), and obtaining the component B after passing.
Preparation of component C:
(1) putting dimethylbenzene, butyl acetate, cyclohexanone and propylene glycol methyl ether acetate into a special production cylinder for a solvent, and stirring at a low speed of 200 revolutions per minute for 15 minutes until the mixture is uniform;
(2) stopping stirring, standing for 10 minutes, sampling and detecting a chromatogram (for a standard sample), and obtaining the component C after the chromatogram is qualified.
According to the mass ratio of the component A, the component B and the component C, 1: 0.2: 1 to obtain the matte varnish of the embodiment.
Example 2
A matte top-coat paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
cellulose acetate butyrate solution comprises the following components in parts by weight:
the anti-settling slurry comprises the following components in parts by weight:
70 parts of dimethylbenzene;
30 parts of anti-settling agent.
The component B comprises the following components in parts by weight:
10 parts of propylene glycol monomethyl ether acetate;
52 parts of butyl acetate;
and 38 parts of HDI type curing agent.
The component C comprises the following components in parts by weight:
a preparation method of matte top-coat paint comprises the following steps:
preparation of the component A:
(1) putting self-extinction hydroxyl acrylic resin, a dispersing agent and part of propylene glycol methyl ether acetate (4 parts) into a paint making cylinder, and dispersing at a low speed (the rotating speed is 700 r/min) for 8 minutes;
(2) slowly adding wax powder under low-speed dispersion (the rotating speed is 700 r/min), and dispersing for 25 min at high speed of 1100 r/min until the fineness is less than or equal to 30 μm;
(3) slowly adding the anti-settling slurry, the cellulose acetate butyrate liquid, the flatting agent, the drier, the defoaming agent, the remaining 10 parts of propylene glycol methyl ether acetate and butyl acetate under low-speed dispersion (the rotating speed is 700 revolutions per minute), dispersing for 8 minutes at the low speed of 700 revolutions per minute, stopping dispersion, standing for 50 minutes, and defoaming to obtain the component A.
Wherein: the preparation method of the cellulose acetate butyrate liquid comprises the following steps:
(1) dispersing dimethylbenzene, butyl acetate and cyclohexanone for 8 minutes at a low speed of 700 revolutions per minute;
(2) slowly adding cellulose acetate butyrate under the condition of low-speed dispersion (the rotating speed is 700 r/min), and dispersing for 8 min at a low speed until the cellulose acetate butyrate is completely dissolved to obtain the cellulose acetate butyrate liquid.
The preparation method of the anti-settling slurry comprises the following steps: adding dimethylbenzene, slowly adding the anti-settling agent under low-speed dispersion, and dispersing for 8 minutes at a low speed of 700 revolutions per minute until the anti-settling agent is uniformly dispersed to obtain the anti-settling slurry.
Preparation of the component B:
(1) adding propylene glycol monomethyl ether acetate, butyl acetate and HDI type curing agent into a special production cylinder for curing agent, and stirring at a low speed of 300 r/min for 12 min until the mixture is uniform;
(2) stopping stirring, standing for 8 minutes, sampling and detecting NCO (7-8 wt%) and solid content (33.5-35.5 wt%), and obtaining the component B after qualified.
Preparation of component C:
(1) putting dimethylbenzene, butyl acetate, cyclohexanone and propylene glycol methyl ether acetate into a special production cylinder for a solvent, and stirring at a low speed of 300 revolutions per minute for 10-15 minutes until the mixture is uniform;
(2) stopping stirring, standing for 8 minutes, sampling and detecting a chromatogram (for a standard sample), and obtaining the component C after the chromatogram is qualified.
According to the mass ratio of the component A, the component B and the component C, 1: 0.25: 1 to obtain the matte varnish of the embodiment.
Example 3
A matte top-coat paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
the cellulose acetate butyrate liquid comprises the following components in parts by weight:
the anti-settling slurry comprises the following components in parts by weight:
70 parts of dimethylbenzene;
30 parts of anti-settling agent.
The component B comprises the following components in parts by weight:
14 parts of propylene glycol methyl ether acetate;
51 parts of butyl acetate;
35 parts of HDI type curing agent.
The component C comprises the following components in parts by weight:
a preparation method of matte top-coat paint comprises the following steps:
preparation of component A:
(1) putting self-extinction hydroxyl acrylic resin, a dispersing agent and part of propylene glycol methyl ether acetate (4 parts) into a paint making cylinder, and dispersing at a low speed (the rotating speed is 800 r/min) for 5-10 minutes;
(2) slowly adding wax powder under low-speed dispersion (the rotating speed is 800 r/min), and dispersing for 25 min at high speed of 1200 r/min until the fineness is less than or equal to 30 μm;
(3) slowly adding the anti-settling slurry, the cellulose acetate butyrate liquid, the flatting agent, the drier, the defoaming agent, the remaining propylene glycol methyl ether acetate (6 parts) and butyl acetate under low-speed dispersion (the rotating speed is 800 revolutions per minute), dispersing for 5 minutes at the low speed of 800 revolutions per minute, stopping dispersing, standing for 20 minutes, and defoaming to obtain the component A.
Wherein: the preparation method of the cellulose acetate butyrate liquid comprises the following steps:
(1) dispersing dimethylbenzene, butyl acetate and cyclohexanone for 5 minutes at a low speed of 800 revolutions per minute;
(2) slowly adding cellulose acetate butyrate under the condition of low-speed dispersion (the rotating speed is 800 r/min), and dispersing for 5 min at a low speed until the cellulose acetate butyrate is completely dissolved to obtain the cellulose acetate butyrate liquid.
The preparation method of the anti-settling slurry comprises the following steps: adding dimethylbenzene, slowly adding the anti-settling agent under low-speed dispersion, and dispersing for 5 minutes at a low speed of 800 revolutions per minute until the anti-settling agent is uniformly dispersed to obtain the anti-settling slurry.
Preparation of the component B:
(1) adding propylene glycol methyl ether acetate, butyl acetate and HDI type curing agent into a special production cylinder for curing agent, and stirring at a low speed of 400 r/min for 10 min until the mixture is uniform;
(2) stopping stirring, standing for 5 minutes, sampling and detecting NCO (7-8 wt%) and solid content (33.5-35.5 wt%), and obtaining the component B after passing.
Preparation of component C:
(1) putting dimethylbenzene, butyl acetate, cyclohexanone and propylene glycol methyl ether acetate into a special production cylinder for a solvent, and stirring at a low speed of 400 revolutions per minute for 10 minutes until the mixture is uniform;
(2) stopping stirring, standing for 5 minutes, sampling and detecting a chromatogram (for a standard sample), and obtaining the component C after the chromatogram is qualified.
According to the mass ratio of the component A, the component B and the component C as 1: 0.3: 1 to obtain the matte varnish of the embodiment.
Example 4
A matte top-coat paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
cellulose acetate butyrate solution comprises the following components in parts by weight:
the anti-settling slurry comprises the following components in parts by weight:
70 parts of dimethylbenzene;
30 parts of anti-settling agent.
The component B comprises the following components in parts by weight:
7 parts of propylene glycol monomethyl ether acetate;
53 parts of butyl acetate;
40 parts of HDI type curing agent.
The component C comprises the following components in parts by weight:
a preparation method of matte varnish comprises the following steps:
preparation of the component A:
(1) putting self-extinction hydroxyl acrylic resin, a dispersing agent and part of propylene glycol methyl ether acetate (4 parts) into a paint making cylinder, and dispersing at a low speed (the rotating speed is 600 revolutions per minute) for 10 minutes;
(2) slowly adding wax powder under low-speed dispersion (the rotating speed is 600 revolutions per minute), and dispersing for 3 minutes at high speed of 1000 revolutions per minute until the fineness is less than or equal to 30 mu m;
(3) slowly adding anti-settling slurry, cellulose acetate butyrate liquid, a flatting agent, a drier, a defoaming agent, the rest propylene glycol methyl ether acetate (6 parts) and butyl acetate under low-speed dispersion (the rotating speed is 600 revolutions per minute), dispersing for 10 minutes at the low speed of 600 revolutions per minute, stopping dispersion, standing for 30 minutes, and defoaming to obtain a component A.
Wherein: the preparation method of the cellulose acetate butyrate liquid comprises the following steps:
(1) dispersing dimethylbenzene, butyl acetate and cyclohexanone for 10 minutes at a low speed of 600 revolutions per minute;
(2) slowly adding cellulose acetate butyrate under the condition of low-speed dispersion (the rotating speed is 600 revolutions per minute), and dispersing for 10 minutes at a low speed until the cellulose acetate butyrate is completely dissolved to obtain cellulose acetate butyrate liquid.
The preparation method of the anti-settling slurry comprises the following steps: adding dimethylbenzene, slowly adding the anti-settling agent under low-speed dispersion (the rotating speed is 600 revolutions per minute), and dispersing for 10 minutes at the low speed of 600 revolutions per minute until the anti-settling agent is uniformly dispersed to obtain the anti-settling slurry.
Preparation of the component B:
(1) adding propylene glycol methyl ether acetate, butyl acetate and HDI type curing agent into a special production cylinder for curing agent, and stirring at a low speed of 200 r/min for 15 min until the mixture is uniform;
(2) stopping stirring, standing for 10 minutes, sampling and detecting NCO (7-8 wt%) and solid content (33.5-35.5 wt%), and obtaining the component B after qualified.
Preparation of component C:
(1) putting dimethylbenzene, butyl acetate, cyclohexanone and propylene glycol methyl ether acetate into a special production cylinder for a solvent, and stirring at a low speed of 200 revolutions per minute for 15 minutes until the mixture is uniform;
(2) stopping stirring, standing for 10 minutes, sampling and detecting a chromatogram (standard sample), and obtaining the component C after the chromatogram is qualified.
According to the mass ratio of the component A, the component B and the component C, 1: 0.25: 1.25 to obtain the matte varnish of the embodiment.
Example 5
A matte top-coat paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
cellulose acetate butyrate solution comprises the following components in parts by weight:
the anti-settling slurry comprises the following components in parts by weight:
70 parts of dimethylbenzene;
30 parts of anti-settling agent.
The component B comprises the following components in parts by weight:
9 parts of propylene glycol methyl ether acetate;
46 parts of butyl acetate;
45 parts of HDI type curing agent.
The component C comprises the following components in parts by weight:
a preparation method of matte top-coat paint comprises the following steps:
preparation of component A:
(1) putting self-extinction hydroxyl acrylic resin, a dispersing agent and part of propylene glycol monomethyl ether acetate (4 parts) into a paint making cylinder, and dispersing at a low speed (the rotating speed is 700 r/min) for 8 minutes;
(2) slowly adding wax powder under low-speed dispersion (the rotating speed is 700 r/min), and dispersing for 25 min at high speed of 1100 r/min until the fineness is less than or equal to 30 μm;
(3) and (3) slowly adding the anti-settling pulp, the cellulose acetate butyrate liquid, the flatting agent, the drier, the defoaming agent, the remaining 10 parts of propylene glycol monomethyl ether acetate and butyl acetate under low-speed dispersion (the rotating speed is 700 revolutions per minute), dispersing for 8 minutes at a low speed of 700 revolutions per minute, stopping dispersion, standing for 50 minutes, and defoaming to obtain the component A.
Wherein: the preparation method of the cellulose acetate butyrate liquid comprises the following steps:
(1) dispersing dimethylbenzene, butyl acetate and cyclohexanone for 8 minutes at a low speed of 700 revolutions per minute;
(2) slowly adding cellulose acetate butyrate under low-speed dispersion (the rotating speed is 700 r/min), and dispersing for 8 min at low speed until the cellulose acetate butyrate is completely dissolved to obtain the cellulose acetate butyrate liquid.
The preparation method of the anti-settling slurry comprises the following steps: adding dimethylbenzene, slowly adding the anti-settling agent under low-speed dispersion, and dispersing for 8 minutes at a low speed of 700 revolutions per minute until the anti-settling agent is uniformly dispersed to obtain the anti-settling slurry.
Preparation of the component B:
(1) adding propylene glycol monomethyl ether acetate, butyl acetate and HDI type curing agent into a special production cylinder for curing agent, and stirring at a low speed of 300 r/min for 12 min until uniform;
(2) stopping stirring, standing for 8 minutes, sampling and detecting NCO (7-8 wt%) and solid content (33.5-35.5 wt%), and obtaining the component B after passing.
Preparation of component C:
(1) putting dimethylbenzene, butyl acetate, cyclohexanone and propylene glycol methyl ether acetate into a special production cylinder for a solvent, and stirring at a low speed of 300 revolutions per minute for 10-15 minutes until the mixture is uniform;
(2) stopping stirring, standing for 8 minutes, sampling and detecting a chromatogram (for a standard sample), and obtaining the component C after the chromatogram is qualified.
According to the mass ratio of the component A, the component B and the component C as 1: 0.25: 1.5, obtaining the matte varnish of the embodiment.
Example 6
A matte top-coat paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
cellulose acetate butyrate solution comprises the following components in parts by weight:
the anti-settling slurry comprises the following components in parts by weight:
70 parts of dimethylbenzene;
30 parts of anti-settling agent.
The component B comprises the following components in parts by weight:
12 parts of propylene glycol methyl ether acetate;
46 parts of butyl acetate;
42 parts of HDI type curing agent.
The component C comprises the following components in parts by weight:
a preparation method of matte top-coat paint comprises the following steps:
preparation of the component A:
(1) putting self-extinction hydroxyl acrylic resin, a dispersing agent and part of propylene glycol methyl ether acetate (4 parts) into a paint making cylinder, and dispersing at a low speed (the rotating speed is 800 r/min) for 5-10 minutes;
(2) slowly adding wax powder under low-speed dispersion (the rotating speed is 800 r/min), and dispersing for 25 min at high speed of 1200 r/min until the fineness is less than or equal to 30 μm;
(3) and (3) slowly adding the anti-settling pulp, the cellulose acetate butyrate liquid, the flatting agent, the drier, the defoaming agent, the remaining propylene glycol methyl ether acetate (6 parts) and butyl acetate under low-speed dispersion (the rotating speed is 800 revolutions per minute), dispersing for 5 minutes at the low speed of 800 revolutions per minute, stopping dispersing, standing for 20 minutes, and defoaming to obtain the component A.
Wherein: the preparation method of the cellulose acetate butyrate liquid comprises the following steps:
(1) dispersing dimethylbenzene, butyl acetate and cyclohexanone for 5 minutes at a low speed of 800 revolutions per minute;
(2) slowly adding cellulose acetate butyrate under the condition of low-speed dispersion (the rotating speed is 800 r/min), and dispersing for 5 min at a low speed until the cellulose acetate butyrate is completely dissolved to obtain the cellulose acetate butyrate liquid.
The preparation method of the anti-settling slurry comprises the following steps: adding dimethylbenzene, slowly adding the anti-settling agent under low-speed dispersion, and dispersing for 5 minutes at a low speed of 800 revolutions per minute until the anti-settling agent is uniformly dispersed to obtain the anti-settling slurry.
Preparation of the component B:
(1) adding propylene glycol methyl ether acetate, butyl acetate and HDI type curing agent into a special production cylinder for curing agent, and stirring at a low speed of 400 r/min for 10 min until the mixture is uniform;
(2) stopping stirring, standing for 5 minutes, sampling and detecting NCO (7-8 wt%) and solid content (33.5-35.5 wt%), and obtaining the component B after passing.
Preparation of component C:
(1) putting dimethylbenzene, butyl acetate, cyclohexanone and propylene glycol methyl ether acetate into a special production cylinder for a solvent, and stirring at a low speed of 400 revolutions per minute for 10 minutes until the mixture is uniform;
(2) stopping stirring, standing for 5 minutes, sampling and detecting a chromatogram (for a standard sample), and obtaining the component C after the chromatogram is qualified.
According to the mass ratio of the component A, the component B and the component C as 1: 0.25: 1 to obtain the matte varnish of the embodiment.
Example 7
A matte top-coat paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
cellulose acetate butyrate solution comprises the following components in parts by weight:
the anti-settling slurry comprises the following components in parts by weight:
70 parts of dimethylbenzene;
30 parts of anti-settling agent.
The component B comprises the following components in parts by weight:
12 parts of propylene glycol methyl ether acetate;
50 parts of butyl acetate;
and 38 parts of HDI type curing agent.
The component C comprises the following components in parts by weight:
a preparation method of matte top-coat paint comprises the following steps:
preparation of component A:
(1) putting self-extinction hydroxyl acrylic resin, a dispersing agent and part of propylene glycol methyl ether acetate (4 parts) into a paint making cylinder, and dispersing at a low speed (the rotating speed is 600 revolutions per minute) for 10 minutes;
(2) slowly adding wax powder under low-speed dispersion (the rotating speed is 600 r/min), and dispersing for 3 min at high speed of 1000 r/min until the fineness is less than or equal to 30 mu m;
(3) slowly adding anti-settling slurry, cellulose acetate butyrate liquid, a flatting agent, a drier, a defoaming agent, the rest propylene glycol methyl ether acetate (6 parts) and butyl acetate under low-speed dispersion (the rotating speed is 600 revolutions per minute), dispersing for 10 minutes at the low speed of 600 revolutions per minute, stopping dispersion, standing for 30 minutes, and defoaming to obtain a component A.
Wherein: the preparation method of the cellulose acetate butyrate liquid comprises the following steps:
(1) dispersing dimethylbenzene, butyl acetate and cyclohexanone for 10 minutes at a low speed of 600 revolutions per minute;
(2) slowly adding cellulose acetate butyrate under the condition of low-speed dispersion (the rotating speed is 600 revolutions per minute), and dispersing for 10 minutes at a low speed until the cellulose acetate butyrate is completely dissolved to obtain cellulose acetate butyrate liquid.
The preparation method of the anti-settling slurry comprises the following steps: adding dimethylbenzene, slowly adding the anti-settling agent under low-speed dispersion (the rotating speed is 600 revolutions per minute), and dispersing for 10 minutes at the low speed of 600 revolutions per minute until the anti-settling agent is uniformly dispersed, thereby obtaining the anti-settling slurry.
Preparation of the component B:
(1) adding propylene glycol methyl ether acetate, butyl acetate and HDI type curing agent into a special production cylinder for curing agent, and stirring at a low speed of 200 r/min for 15 min until the mixture is uniform;
(2) stopping stirring, standing for 10 minutes, sampling and detecting NCO (7-8 wt%) and solid content (33.5-35.5 wt%), and obtaining the component B after qualified.
Preparation of component C:
(1) putting dimethylbenzene, butyl acetate, cyclohexanone and propylene glycol methyl ether acetate into a special production cylinder for a solvent, and stirring at a low speed of 200 revolutions per minute for 15 minutes until the mixture is uniform;
(2) stopping stirring, standing for 10 minutes, sampling and detecting a chromatogram (for a standard sample), and obtaining the component C after the chromatogram is qualified.
According to the mass ratio of the component A, the component B and the component C as 1: 0.3: 1.5, obtaining the matte varnish of the embodiment.
Comparative example 1
A clean finish paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
the difference between the comparative example 1 and the example 1 is that the component A of the clear finishing paint in the comparative example 1 adopts hydroxyl acrylic resin instead of self-extinction hydroxyl acrylic resin, and the types, the using amounts and the preparation methods of other raw materials are the same as those in the example 1.
Comparative example 2
A clean finish paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
the difference between the comparative example 2 and the example 1 is that the component A of the clear finish paint of the comparative example 2 adopts hydroxy acrylic resin to replace cellulose acetate butyrate liquid, and the types, the using amounts and the preparation methods of other raw materials are the same as those of the example 1.
Comparative example 3
A clear finish paint is prepared from a component A, a component B and a component C.
Wherein: the component A comprises the following components in parts by weight:
the difference between comparative example 3 and example 1 is that the extinction powder is added into the component A of the clear finish paint in the comparative example 3, the hydroxyl acrylic resin is adopted to replace the self-extinction hydroxyl acrylic resin, meanwhile, the using amount of the hydroxyl acrylic resin is reduced, and the types, the using amounts and the preparation methods of other raw materials are the same as those in the example 1.
Performance testing
The clear coats prepared in examples 1 to 7 and comparative examples 1 to 3 were observed for their state in a container and storage stability, and at the same time, the prepared clear coats were applied to solid wood furniture, and the properties of the paint films were observed and examined, as shown in tables 1 and 2.
Wherein: the process for applying the varnish to the solid wood furniture comprises the following steps:
(1) polishing solid wood furniture by No. 240 abrasive paper, and wiping by using a filling agent for overnight;
(2) after polishing with No. 320 abrasive paper, coating two crosses (firstly, transversely, then, vertically, transversely and then, vertically) with a clear anti-collapse and anti-expansion high-transparency primer for overnight;
(3) polishing with No. 320 abrasive paper, coating two crosses (firstly, transversely, then, vertically, transversely and then, vertically) with a clear anti-collapse and anti-expansion high-transparency primer for overnight;
(4) and (3) polishing with No. 400 and No. 600 sand paper in sequence, then carrying out color correction, then respectively coating the clear finish of examples 1-7 and comparative examples 1-3, and standing overnight to obtain a paint film to be detected.
The filler used in the test process can be a commercially available filler for common solid wood furniture, and the transparent primer can be a commercially available transparent primer for common solid wood furniture.
Table 1: performance test results for the matte clear topcoats and paint films of examples 1-7
Table 2: performance test results of the clear coats and paint films of comparative examples 1 to 3
As can be seen from tables 1 and 2, the matte top-coat paints prepared in the embodiments 1 to 7 have good stability, and when the paint films are applied to solid wood furniture, the paint films have good adhesive force, good flexibility, high hardness, good leveling property, good chemical resistance, durability and other properties, and the paint films have good transparency, uniform side gloss and no flowering phenomenon, and the gloss can reach 1 to 2.5 degrees. In comparative examples 1 to 3, since a conventional hydroxyl acrylic resin was used or no cellulose acetate butyrate was added, the appearance, fullness, uniformity and scratch resistance of the paint film were inferior to those of examples 1 to 7, and extremely matte gloss could not be achieved.
It will be obvious to those skilled in the art that many simple derivations or substitutions can be made without inventive effort without departing from the inventive concept. Therefore, simple modifications to the present invention by those skilled in the art according to the present disclosure should be within the scope of the present invention. The above embodiments are preferred embodiments of the present invention, and all similar processes and equivalent variations to those of the present invention should fall within the scope of the present invention.
Claims (10)
1. The matte top-coat paint is characterized in that the preparation raw materials comprise a component A, a component B and a component C, wherein the component A comprises self-extinction hydroxyl acrylic resin and cellulose acetate butyrate; the component B comprises an HDI type curing agent; the component C is a solvent.
2. The matte varnish according to claim 1, wherein the mass ratio of the component A, the component B and the component C is 1: (0.2-0.3): (1-1.5).
3. The matte top-coat according to claim 1, wherein the self-matting hydroxyacrylic resin has a particle size of 5 to 15 μm.
4. The matte clear finish according to claim 1 or 3, wherein the self-matting hydroxy acrylic resin has a non-volatile content of 48 to 52 wt%, a viscosity of 4000-10000Cp at 25 ± 1 ℃, an acid value of 15 to 35mg KOH/g and a hydroxyl value of 35 to 40mg KOH/g.
5. The matte varnish according to claim 1, wherein the cellulose acetate butyrate has an acetate group content of 12.5-14.5 wt%, a butyrate group content of 37-39 wt%, a hydroxyl group content of 1.2-1.4%, a viscosity of 7.5-7.7poise, and an average molecular weight of 35000-45000.
6. The matte top-coat paint according to claim 1, wherein the component A further comprises at least one of a dispersant, an anti-settling agent, propylene glycol methyl ether acetate, wax powder, a leveling agent, a drier, an antifoaming agent and butyl acetate;
preferably, the component A comprises the following components in parts by weight:
the cellulose acetate butyrate solution comprises the following components in parts by weight:
7. the matte varnish according to claim 1, wherein the B component further comprises propylene glycol methyl ether acetate and/or butyl acetate;
preferably, the component B comprises the following components in parts by weight:
5-15 parts of propylene glycol methyl ether acetate;
35-55 parts of butyl acetate;
35-45 parts of HDI type curing agent.
8. The matte varnish according to claim 1, wherein the component C comprises, in parts by weight:
9. a process for the preparation of a matte clear top-coat according to any one of claims 1 to 8, comprising the steps of:
(1) dispersing self-extinction hydroxyl acrylic resin, adding other raw materials for preparing the component A, and mixing to obtain the component A;
(2) and (2) adding the component B and the component C into the component A prepared in the step (1) and mixing to obtain the matte top-coat paint.
10. Use of the matte varnish according to any one of claims 1 to 8 in the field of solid wood furniture.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115895333A (en) * | 2022-10-13 | 2023-04-04 | 苏州市贝特利高分子材料股份有限公司 | High-temperature-resistant gravure matt oil suitable for PET (polyethylene terephthalate) film and preparation method thereof |
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| CN112646467A (en) * | 2020-11-30 | 2021-04-13 | 澳达树熊涂料(惠州)有限公司 | Wear-resistant high-transparency super-smooth PU open matte top-coat paint and preparation method thereof |
| CN113278350A (en) * | 2021-04-14 | 2021-08-20 | 上海嘉宝莉涂料有限公司 | Matte varnish and application thereof |
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| JP2000204317A (en) * | 1999-01-13 | 2000-07-25 | Kanegafuchi Chem Ind Co Ltd | Curable resin composition for mat top coating and coated article coated with the same |
| CN103305120A (en) * | 2013-06-28 | 2013-09-18 | 江苏海田技术有限公司 | Ultraviolet (UV)-natural matte finishing paint |
| CN112646467A (en) * | 2020-11-30 | 2021-04-13 | 澳达树熊涂料(惠州)有限公司 | Wear-resistant high-transparency super-smooth PU open matte top-coat paint and preparation method thereof |
| CN113278350A (en) * | 2021-04-14 | 2021-08-20 | 上海嘉宝莉涂料有限公司 | Matte varnish and application thereof |
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| CN115895333A (en) * | 2022-10-13 | 2023-04-04 | 苏州市贝特利高分子材料股份有限公司 | High-temperature-resistant gravure matt oil suitable for PET (polyethylene terephthalate) film and preparation method thereof |
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