CN110951336A - Modified acrylic varnish and preparation method thereof - Google Patents
Modified acrylic varnish and preparation method thereof Download PDFInfo
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- CN110951336A CN110951336A CN201811120675.4A CN201811120675A CN110951336A CN 110951336 A CN110951336 A CN 110951336A CN 201811120675 A CN201811120675 A CN 201811120675A CN 110951336 A CN110951336 A CN 110951336A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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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
- C09D5/08—Anti-corrosive paints
-
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a modified acrylic varnish and a preparation method thereof, wherein the acrylic varnish consists of a main agent, a curing agent and a diluent, and the main agent comprises the following components in parts by weight: curing agent: 1-1.5:0.4-0.5:0.3-0.5 of diluent; the invention also provides a preparation method of the varnish, which comprises the preparation of the main agent and the preparation of the curing agent and the diluent. The modified acrylic varnish disclosed by the invention is prepared by mixing three components, taking acrylic resin as a main film forming substance, and mixing and modifying the acrylic resin, polyurethane and cellulose acetate butyrate, wherein the three components have great complementarity in performance, so that the corrosion resistance and the solvent resistance of the acrylic resin are enhanced, and the brightness of the varnish can be increased. In addition, the water resistance and the adhesion of the varnish can be improved by combining the acrylic resin with the polyurethane curing agent and the diluent.
Description
Technical Field
The invention relates to the field of coatings, in particular to a modified acrylic varnish and a preparation method thereof.
Technical Field
With the increasing living standard of people, the quality requirement on home decoration is higher and higher. The requirements for the painting of movable parts of woodworkers in decoration, such as the manufacture of bookshelves and wardrobes, and purchased furniture, etc., tend to be perfect. However, the varnishes currently on the market have some drawbacks: poor brightness and adhesion, weak heat resistance and water resistance, and easy shedding and mildewing of the painted surface.
Disclosure of Invention
Based on the above, the invention aims to provide a modified acrylic varnish and a preparation method thereof, so as to effectively solve the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a modified acrylic varnish consists of a main agent, a curing agent and a diluent, wherein the weight parts of the main agent, the curing agent and the diluent are as follows: a main agent: curing agent: 1-1.5:0.4-0.5:0.3-0.5 of diluent; the main agent comprises the following components in parts by weight: 50-70 parts of acrylic resin, 30-40 parts of polyurethane, 15-25 parts of cellulose acetate butyrate, 0.8-1.5 parts of flatting agent, 1-2 parts of defoaming agent, 5-10 parts of xylene, 5-10 parts of butanol and 5-6 parts of film-forming assistant; the curing agent is prepared by mixing a polyurethane curing agent and dehydrated n-butyl acetate, wherein the polyurethane curing agent accounts for 30-40 parts, and the dehydrated n-butyl acetate accounts for 40-50 parts; the diluent comprises the following components in parts by weight: 20-30 parts of ethyl acetate, 10-30 parts of propylene glycol methyl ether acetate, 20-30 parts of toluene and 10-30 parts of cyclohexanone.
Compared with the prior art, the modified acrylic varnish disclosed by the invention is prepared by mixing three components, taking acrylic resin as a main film forming substance and mixing and modifying polyurethane and cellulose acetate butyrate, and has great complementarity in performance, so that the corrosion resistance and solvent resistance of the acrylic resin are enhanced, and the brightness of the varnish can be increased. In addition, the water resistance and the adhesion of the varnish can be improved by combining the acrylic resin with the polyurethane curing agent and the diluent.
Furthermore, the defoaming agent is a polyether defoaming agent, and the polyether defoaming agent has lasting effect and high defoaming speed.
Further, the leveling agent is polyether modified polymethyl alkyl siloxane solution, polyester modified poly dimethyl siloxane solution containing acrylic acid functional group, acrylate copolymer solution or the mixture thereof.
Further, the film-forming aid comprises the following raw materials in parts by weight: 1-3 parts of silane coupling agent KH550, 15-25 parts of dodecyl alcohol ester and 10-15 parts of benzyl alcohol; further, the preparation method of the film-forming additive comprises the steps of mixing the silane coupling agent, the dodecyl alcohol ester and the benzyl alcohol in parts by weight, stirring and reacting for 30-40 minutes, then heating to 60-80 ℃, and continuing to stir and react for 30 minutes to obtain the film-forming additive.
The invention also provides a preparation method of the modified acrylic varnish, which comprises the following steps: the preparation method of the main agent comprises the following steps: sequentially adding acrylic resin, polyurethane, cellulose acetate butyrate and a film-forming aid in proportion into a clean container meeting the standard, dispersing for 5-7 minutes at the speed of 800 revolutions per minute of 700-;
the preparation method of the curing agent comprises the following steps: after the polyurethane curing agent and the n-butyl acetate dehydrate in parts by weight are mixed, the mixture is dispersed for 5 to 10 minutes at the speed of 700 and 800 revolutions per minute until the mixture is uniform;
the preparation method of the diluent comprises the following steps: and mixing the ethyl acetate, the propylene glycol methyl ether acetate, the toluene and the cyclohexanone in parts by weight, and dispersing for 4-10 minutes at the speed of 500-600 revolutions per minute until the mixture is uniform.
For a better understanding and practice, the present invention is described in detail below.
Detailed Description
The technical solution of the present invention will be described in detail with reference to specific embodiments. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
The invention will be described below by means of specific examples.
Example 1
A modified acrylic varnish consists of a main agent, a curing agent and a diluent, wherein the weight parts of the main agent, the curing agent and the diluent are as follows: a main agent: curing agent: diluent 1:0.4: 0.3;
the main agent is prepared by the following method:
(1) preparation of a film-forming aid: mixing a silane coupling agent KH 5503 parts, a dodecyl alcohol ester 15 parts and benzyl alcohol 15 parts, stirring and reacting for 30 minutes, then heating to 80 ℃, and continuing stirring and reacting for 30 minutes to obtain the modified silane coupling agent.
(2) Sequentially adding 50 parts of acrylic resin, 40 parts of polyurethane, 15 parts of cellulose acetate butyrate and 5 parts of a film-forming additive into a clean container meeting the standard, dispersing for 5-7 minutes at the speed of 800 revolutions per minute of 700-;
the preparation method of the curing agent comprises the following steps: 30 parts of polyurethane curing agent and 40 parts of dehydrated n-butyl acetate are mixed and dispersed for 5-10 minutes at the speed of 700-800 rpm until the mixture is uniform.
The preparation method of the diluent comprises the following steps: after 20 parts of ethyl acetate, 30 parts of propylene glycol methyl ether acetate, 20 parts of toluene and 10 parts of cyclohexanone are mixed, the mixture is dispersed for 4-10 minutes at the speed of 500-600 revolutions per minute until the mixture is uniform.
And filtering and packaging the main agent through a 400-mesh screen after the preparation of the main agent is finished, filtering and packaging the diluent through a 800-mesh screen after the preparation of the diluent is finished, and filtering and packaging the curing agent through a 600-mesh screen after the preparation of the curing agent is finished.
Example 2
A modified acrylic varnish consists of a main agent, a curing agent and a diluent, wherein the weight parts of the main agent, the curing agent and the diluent are as follows: a main agent: curing agent: diluent 1.5:0.5: 0.5;
the main agent is prepared by the following method:
(1) preparation of a film-forming aid: mixing a silane coupling agent KH 5501 parts, a dodecyl alcohol ester 20 parts and benzyl alcohol 10 parts, stirring and reacting for 40 minutes, then heating to 60 ℃, and continuing to stir and react for 30 minutes to obtain the modified silane coupling agent.
(2) Sequentially adding 70 parts of acrylic resin, 30 parts of polyurethane, 25 parts of cellulose acetate butyrate and 5 parts of a film-forming additive into a clean container meeting the standard, dispersing for 5-7 minutes at the speed of 800 revolutions per minute of 700-;
the preparation method of the curing agent comprises the following steps: 40 parts of polyurethane curing agent and 50 parts of dehydrated n-butyl acetate are mixed and dispersed for 5-10 minutes at the speed of 700-800 rpm until the mixture is uniform.
The preparation method of the diluent comprises the following steps: after mixing 30 parts of ethyl acetate, 10 parts of propylene glycol methyl ether acetate, 30 parts of toluene and 30 parts of cyclohexanone, dispersing for 4-10 minutes at the speed of 500-600 revolutions per minute until the mixture is uniform.
And filtering and packaging the main agent through a 400-mesh screen after the preparation of the main agent is finished, filtering and packaging the diluent through a 800-mesh screen after the preparation of the diluent is finished, and filtering and packaging the curing agent through a 600-mesh screen after the preparation of the curing agent is finished.
Example 3
A modified acrylic varnish consists of a main agent, a curing agent and a diluent, wherein the weight parts of the main agent, the curing agent and the diluent are as follows: a main agent: curing agent: diluent 1.2:0.3: 0.5;
the main agent is prepared by the following method:
(1) preparation of a film-forming aid: mixing a silane coupling agent KH 5502 parts, a dodecyl alcohol ester 20 parts and benzyl alcohol 10 parts, stirring and reacting for 40 minutes, then heating to 60 ℃, and continuing stirring and reacting for 30 minutes to obtain the modified silane coupling agent.
(2) Sequentially adding 60 parts of acrylic resin, 35 parts of polyurethane, 20 parts of cellulose acetate butyrate and 6 parts of a film-forming additive into a clean container meeting the standard, dispersing for 5-7 minutes at the speed of 800 revolutions per minute of 700-;
the preparation method of the curing agent comprises the following steps: 35 parts of polyurethane curing agent and 45 parts of dehydrated n-butyl acetate are mixed and dispersed for 5-10 minutes at the speed of 700-800 rpm until the mixture is uniform.
The preparation method of the diluent comprises the following steps: after mixing 25 parts of ethyl acetate, 20 parts of propylene glycol methyl ether acetate, 25 parts of toluene and 25 parts of cyclohexanone, dispersing for 4-10 minutes at the speed of 500-600 revolutions per minute until the mixture is uniform.
And filtering and packaging the main agent through a 400-mesh screen after the preparation of the main agent is finished, filtering and packaging the diluent through a 800-mesh screen after the preparation of the diluent is finished, and filtering and packaging the curing agent through a 600-mesh screen after the preparation of the curing agent is finished.
Table 1 shows the comparison of the technical indexes of examples 1-3 with the technical indexes of the national standard GB/T2397-2009,
TABLE 1
As can be seen from the comparison, all indexes of the modified acrylic varnish disclosed by the invention are higher than technical indexes in national standards. The varnish disclosed by the invention has good heat resistance, water resistance and adhesion.
Claims (5)
1. The modified acrylic varnish is characterized by comprising a main agent, a curing agent and a diluent, wherein the weight parts of the main agent, the curing agent and the diluent are as follows: a main agent: curing agent: 1-1.5:0.4-0.5:0.3-0.5 of diluent;
the main agent comprises the following components in parts by weight: 50-70 parts of acrylic resin, 30-40 parts of polyurethane, 15-25 parts of cellulose acetate butyrate, 0.8-1.5 parts of flatting agent, 1-2 parts of defoaming agent, 5-10 parts of xylene, 5-10 parts of butanol and 5-6 parts of film-forming assistant;
the curing agent is prepared by mixing a polyurethane curing agent and dehydrated n-butyl acetate, wherein the polyurethane curing agent accounts for 30-40 parts, and the dehydrated n-butyl acetate accounts for 40-50 parts;
the diluent comprises the following components in parts by weight: 20-30 parts of ethyl acetate, 10-30 parts of propylene glycol methyl ether acetate, 20-30 parts of toluene and 10-30 parts of cyclohexanone.
2. The modified acrylic varnish according to claim 1, wherein: the defoaming agent is a polyether defoaming agent.
3. The modified acrylic varnish according to claim 1, wherein: the leveling agent is one or a mixture of more than two of polyether modified polymethyl alkyl siloxane solution, polyester modified poly dimethyl siloxane solution containing acrylic acid functional group and acrylate copolymer solution.
4. The modified acrylic varnish according to claim 1, wherein: the film-forming assistant comprises the following raw materials in parts by weight: 1-3 parts of silane coupling agent KH550, 15-25 parts of dodecyl alcohol ester and 10-15 parts of benzyl alcohol; the preparation method of the film-forming additive comprises the steps of mixing the silane coupling agent, the dodecyl alcohol ester and the benzyl alcohol in parts by weight, stirring and reacting for 30-40 minutes, then heating to 60-80 ℃, and continuing to stir and react for 30 minutes to obtain the film-forming additive.
5. The method for producing a modified acrylic varnish according to claim 1, characterized in that: the preparation method of the main agent comprises the following steps: sequentially adding acrylic resin, polyurethane, cellulose acetate butyrate and a film-forming aid in proportion into a clean container meeting the standard, dispersing for 5-7 minutes at the speed of 800 revolutions per minute of 700-;
the preparation method of the curing agent comprises the following steps: after the polyurethane curing agent and the n-butyl acetate dehydrate in parts by weight are mixed, the mixture is dispersed for 5 to 10 minutes at the speed of 700 and 800 revolutions per minute until the mixture is uniform;
the preparation method of the diluent comprises the following steps: and mixing the ethyl acetate, the propylene glycol methyl ether acetate, the toluene and the cyclohexanone in parts by weight, and dispersing for 4-10 minutes at the speed of 500-600 revolutions per minute until the mixture is uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811120675.4A CN110951336A (en) | 2018-09-26 | 2018-09-26 | Modified acrylic varnish and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811120675.4A CN110951336A (en) | 2018-09-26 | 2018-09-26 | Modified acrylic varnish and preparation method thereof |
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| CN110951336A true CN110951336A (en) | 2020-04-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040266899A1 (en) * | 2001-12-21 | 2004-12-30 | Xaver Muenz | Expandable epoxy resin-based systems modified with thermoplastic polymers |
| CN103937396A (en) * | 2014-04-23 | 2014-07-23 | 三棵树涂料股份有限公司 | Modified acrylic anti-yellowing matt varnish and preparation method thereof |
| CN104119792A (en) * | 2014-07-19 | 2014-10-29 | 金甲化工企业(中山)有限公司 | Double-component polyurethane coating capable of eliminating formaldehyde in air |
| CN104327698A (en) * | 2013-07-22 | 2015-02-04 | 上海富臣化工有限公司 | Odorless benzene-free acrylic polyurethane modified nitro varnish finishing coat |
-
2018
- 2018-09-26 CN CN201811120675.4A patent/CN110951336A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040266899A1 (en) * | 2001-12-21 | 2004-12-30 | Xaver Muenz | Expandable epoxy resin-based systems modified with thermoplastic polymers |
| CN104327698A (en) * | 2013-07-22 | 2015-02-04 | 上海富臣化工有限公司 | Odorless benzene-free acrylic polyurethane modified nitro varnish finishing coat |
| CN103937396A (en) * | 2014-04-23 | 2014-07-23 | 三棵树涂料股份有限公司 | Modified acrylic anti-yellowing matt varnish and preparation method thereof |
| CN104119792A (en) * | 2014-07-19 | 2014-10-29 | 金甲化工企业(中山)有限公司 | Double-component polyurethane coating capable of eliminating formaldehyde in air |
Non-Patent Citations (1)
| Title |
|---|
| 江苏省计划经济委员会等: "《中国化学建材概览》", 30 September 1993, 中国建材工业出版社 * |
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