CN113088114A - Wear-resistant polyurethane coating and preparation method thereof - Google Patents
Wear-resistant polyurethane coating and preparation method thereof Download PDFInfo
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- CN113088114A CN113088114A CN202110375954.0A CN202110375954A CN113088114A CN 113088114 A CN113088114 A CN 113088114A CN 202110375954 A CN202110375954 A CN 202110375954A CN 113088114 A CN113088114 A CN 113088114A
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- wear
- polyurethane coating
- resistant polyurethane
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a wear-resistant polyurethane coating and a preparation method thereof, wherein the wear-resistant polyurethane coating is prepared from the following raw materials: the polyurethane-based resin comprises polyurethane matrix resin, acrylate, polyketone resin, nitrocellulose, nano silicon dioxide, nano calcium carbonate, an auxiliary agent and a solvent, wherein the polyurethane matrix resin is a mixture of poly sebacic acid-polybutadiene diol ester polyol, polyethylene glycol-1, 4 butanediol adipate polyol and 2-methyl-1, 5-pentanediol, and the weight ratio of the poly sebacic acid-polybutadiene diol ester polyol to the polyethylene glycol-1, 3 to 2 is (2-5). The coating composition prepared by the invention is convenient to prepare and use, can effectively resist friction, wear, scratch and scratch, and enhances the scratch resistance of the surface of a coating film.
Description
Technical Field
The invention relates to the technical field of high polymer coatings, in particular to a wear-resistant polyurethane coating and a preparation method thereof.
Background
The polyurethane paint is prepared by reacting polyisocyanate with polyhydroxy compound, and its coating film is tough, lustrous, strong in adhesive force, good in water-proof and corrosion-resistant properties, and can be extensively used in high-grade wood furniture and metal surface. Polyurethane coatings dominate the wood coatings industry, accounting for 75% of the market share, and automotive refinish paints, accounting for about 40% of the market share, and are also increasingly used in plastic coatings and automotive refinish paints, accounting for about 10% of the market share.
The existing polyurethane paint film is easy to be rubbed by articles in life to generate obvious marks, and in order to overcome the defects, the wear-resistant polyurethane paint is urgently needed to be developed to solve the problems.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a wear-resistant polyurethane coating and a preparation method thereof, wherein the polyurethane matrix resin, acrylic ester, polyketone resin and nitrocellulose are used as main materials, and nano silicon dioxide, nano calcium carbonate and an auxiliary agent are used as auxiliary materials to prepare the super wear-resistant coating.
In order to achieve the above object, the present invention adopts the following aspects
The wear-resistant polyurethane coating is prepared from the following raw materials:
polyurethane matrix resin, acrylic ester, polyketone resin, nitrocellulose, nano silicon dioxide, nano calcium carbonate, an auxiliary agent and a solvent.
The molecular structure of the polyurethane matrix resin contains urethane bonds, and the polyurethane matrix resin is used as the matrix resin in the invention, and has the functions of bonding, balancing load, dispersing load and protecting filler; the acrylate has good yellowing resistance and good weather resistance, is used as film-forming resin in the invention, and has good fluidity, soft film-forming property and high elasticity; the polyketone resin is used as a solvent-type adhesive in the invention, so that the initial viscosity and the sustained viscosity can be improved, and the problem of insufficient viscosity of polyurethane matrix resin is solved; the nitrocellulose is used as a film forming agent in the invention, and has the advantages of fast film forming and fast drying; the nano silicon dioxide and the nano calcium carbonate are used as fillers in the invention to improve the wear resistance.
Preferably, the wear-resistant polyurethane coating consists of the following raw materials in parts by weight:
preferably, the wear-resistant polyurethane coating consists of the following raw materials in parts by weight:
preferably, the polyurethane matrix resin is a mixture of sebacic acid-polybutadiene diol ester polyol, polyethylene glycol-1, 4-butanediol adipate polyol and 2-methyl-1, 5-pentanediol in a weight ratio of (2-5) to (1-3) to 2.
Preferably, the acrylate is one or a mixture of methyl acrylate, ethyl acrylate, 2-methyl methacrylate and 2-ethyl methacrylate.
Preferably, the specific surface area of the nano-silica and the nano-calcium carbonate is 100-400m2/g。
Preferably, the auxiliary agent is one or a mixture of more of a leveling agent, a curing agent, a slipping agent, a dispersing agent and a thickening agent.
Preferably, the curing agent is one or more of polyisocyanate resin, fatty amine and polyamide.
Preferably, the solvent is one or more of aromatic hydrocarbon, alcohol and lipid organic solvent.
A preparation method of wear-resistant polyurethane paint comprises the following steps:
s1, putting the solvent into the reaction kettle at normal temperature, and uniformly stirring;
s2, putting the polyurethane matrix resin into a reaction kettle, and stirring at high temperature and high speed under the condition of condensation and reflux until the polyurethane matrix resin is fully dissolved;
s3, sequentially adding acrylate, polyketone resin and nitrocellulose into a reaction kettle, and stirring at a high temperature and a high speed under the condition of condensation reflux until the materials are fully and uniformly mixed;
s4, closing the heating device, adding the nano silicon dioxide and the nano calcium carbonate into the reaction kettle, and stirring at a high speed until the nano silicon dioxide and the nano calcium carbonate are fully and uniformly mixed;
and S5, adding the auxiliary agent into the reaction kettle, and uniformly stirring at a high speed to obtain the wear-resistant polyurethane coating.
Preferably, S2, the high-speed stirring time is 1.5-2.0 hours, the stirring speed is 120-900r/min, and the temperature is 120-150 ℃; s3, the high-speed stirring time is 1.5-2.5 hours, the stirring speed is 120-1000r/min, and the temperature is 160-180 ℃.
The invention has the beneficial effects that:
the invention takes polyurethane matrix resin, acrylic ester, polyketone resin and nitrocellulose as main materials and takes the matching use of nano silicon dioxide and nano calcium carbonate as auxiliary materials, thereby playing a synergistic effect and thoroughly improving the hardness and the wear resistance of the coating.
The coating composition prepared by the invention is convenient to prepare and use, can effectively resist friction, wear, scratch and scratch, and enhances the scratch resistance of the surface of a coating film.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the present application with reference to the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the embodiments in the present application shall fall within the protection scope of the present application.
Example 1
The wear-resistant polyurethane coating comprises the following raw materials in parts by weight:
30 parts of polyurethane matrix resin, 16 parts of methyl acrylate, 3 parts of polyketone resin, 4 parts of nitrocellulose, 1 part of nano silicon dioxide, 4 parts of nano calcium carbonate, 0.2 part of auxiliary agent and 50 parts of solvent.
Wherein the polyurethane matrix resin is a mixture of poly sebacic acid-polybutadiene diol ester polyol, polyethylene glycol-1, 4 butanediol adipate polyol and 2-methyl-1, 5-pentanediol in a weight ratio of 3: 2.
The auxiliary agent is a mixture of a flatting agent, a curing agent and a slipping agent.
The solvent is lipid organic solvent.
Example 2
The wear-resistant polyurethane coating comprises the following raw materials in parts by weight:
40 parts of polyurethane matrix resin, 12 parts of ethyl acrylate, 4 parts of polyketone resin, 3 parts of nitrocellulose, 2 parts of nano silicon dioxide, 3 parts of nano calcium carbonate, 0.3 part of an auxiliary agent and 55 parts of a solvent.
Wherein the polyurethane matrix resin is a mixture of poly sebacic acid-polybutadiene diol ester polyol, polyethylene glycol-1, 4 butanediol adipate polyol and 2-methyl-1, 5-pentanediol in a weight ratio of 4: 3: 2.
The auxiliary agent is a mixture of a curing agent and a slip agent.
The solvent is an alcohol organic solvent.
Example 3
The wear-resistant polyurethane coating comprises the following raw materials in parts by weight:
45 parts of polyurethane matrix resin, 10 parts of 2-methyl methacrylate, 5 parts of polyketone resin, 2 parts of nitrocellulose, 2 parts of nano silicon dioxide, 3 parts of nano calcium carbonate, 0.4 part of an auxiliary agent and 60 parts of a solvent.
Wherein the polyurethane matrix resin is a mixture of poly sebacic acid-polybutadiene diol ester polyol, polyethylene glycol-1, 4 butanediol adipate polyol and 2-methyl-1, 5-pentanediol in a weight ratio of 5: 3: 2.
The auxiliary agent is a mixture of a curing agent, a dispersing agent and a thickening agent.
The solvent is aromatic hydrocarbon organic solvent.
Example 4
The wear-resistant polyurethane coating comprises the following raw materials in parts by weight:
50 parts of polyurethane matrix resin, 8 parts of 2-ethyl methacrylate, 6 parts of polyketone resin, 1 part of nitrocellulose, 3 parts of nano silicon dioxide, 2 parts of nano calcium carbonate, 0.5 part of an auxiliary agent and 65 parts of a solvent.
Wherein the polyurethane matrix resin is a mixture of poly sebacic acid-polybutadiene diol ester polyol, polyethylene glycol-1, 4 butanediol adipate polyol and 2-methyl-1, 5-pentanediol in a weight ratio of 5: 2.
The auxiliary agent is a mixture of a flatting agent, a curing agent and a slipping agent.
The solvent is a mixture of aromatic hydrocarbon, alcohol and lipid organic solvent.
A method of making an abrasion resistant polyurethane coating as described in any of embodiments 1-4, comprising the steps of:
s1, putting the solvent into the reaction kettle at normal temperature, and uniformly stirring;
s2, putting the polyurethane matrix resin into a reaction kettle, and stirring at a high temperature and a high speed under the condition of condensation reflux until the polyurethane matrix resin is fully dissolved, wherein the stirring time is 1.5 hours, the stirring speed is 800r/min, and the temperature is 140 ℃;
s3, sequentially adding acrylate, polyketone resin and nitrocellulose into a reaction kettle, and stirring at a high temperature and a high speed under the condition of condensation reflux until the materials are fully and uniformly mixed, wherein the stirring time is 2.0 hours, the stirring speed is 1000r/min, and the temperature is 180 ℃;
s4, closing the heating device, adding the nano silicon dioxide and the nano calcium carbonate into the reaction kettle, and stirring at a high speed until the nano silicon dioxide and the nano calcium carbonate are fully and uniformly mixed;
and S5, adding the auxiliary agent into the reaction kettle, and uniformly stirring at a high speed to obtain the wear-resistant polyurethane coating.
S2, stirring at high speed for 1.5-2.0 hours at the speed of 120-; s3, the high-speed stirring time is 1.5-2.5 hours, the stirring speed is 120-1000r/min, and the temperature is 160-180 ℃.
The wear-resistant polyurethane coatings obtained in examples 1-4 are respectively coated on the surface of a material and cured for 24 hours at normal temperature to obtain wear-resistant polyurethane coatings.
The flexibility of the material is tested according to the standard GB/T1731-1993, the adhesion of the material is tested according to the standard GB/T5210-.
The coating adhesion, low temperature (-30 ℃) flexibility, room temperature tensile properties (MPa) and hardness obtained in each example are shown in Table 1:
the results of the performance measurements are shown in table 1:
| example 1 | Example 2 | Example 3 | Example 4 | |
| Adhesion force | Level 1 | Level 0 | Level 0 | Level 1 |
| Flexibility | No crack | No crack | No crack | No crack |
| Breaking strength | 24.83 | 26.74 | 29.22 | 23.58 |
| Hardness of pencil | 2H | 3H | 3H | 2H |
TABLE 1
As can be seen from Table 1, the coating obtained by the invention has excellent flexibility at normal temperature, better mechanical property, strong hardness and good tensile property.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The wear-resistant polyurethane coating is characterized by comprising the following raw materials:
polyurethane matrix resin, acrylic ester, polyketone resin, nitrocellulose, nano silicon dioxide, nano calcium carbonate, an auxiliary agent and a solvent.
2. The wear-resistant polyurethane coating as claimed in claim 1, which is prepared from the following raw materials in parts by weight:
3. the wear-resistant polyurethane coating as claimed in claim 2, which is prepared from the following raw materials in parts by weight:
4. an abrasion resistant polyurethane coating according to claim 1 wherein said polyurethane matrix resin is a mixture of sebacic acid-polybutadiene diol polyol, polyethylene glycol-1, 4-butanediol adipate polyol and 2-methyl-1, 5-pentanediol in a weight ratio of (2-5) to (1-3) to 2.
5. The abrasion-resistant polyurethane coating according to claim 1, wherein the acrylate is one or a mixture of methyl acrylate, ethyl acrylate, 2-methyl methacrylate and 2-ethyl methacrylate.
6. The wear-resistant polyurethane coating as claimed in claim 1, wherein the specific surface area of the nano silica and the nano calcium carbonate is 100-400m2/g。
7. The wear-resistant polyurethane coating as claimed in claim 1, wherein the auxiliary agent is one or more of a leveling agent, a curing agent, a slip agent, a dispersing agent and a thickening agent.
8. The wear-resistant polyurethane coating of claim 7, wherein the curing agent is one or more of polyisocyanate resin, aliphatic amine and polyamide.
9. The abrasion-resistant polyurethane coating according to claim 1, wherein the solvent is one or more of aromatic hydrocarbons, alcohols and organic solvents of lipids.
10. A process for the preparation of an abrasion resistant polyurethane coating according to any one of claims 1 to 9, characterized in that it comprises the following steps:
s1, putting the solvent into the reaction kettle at normal temperature, and uniformly stirring;
s2, putting the polyurethane matrix resin into a reaction kettle, and stirring at high temperature and high speed under the condition of condensation and reflux until the polyurethane matrix resin is fully dissolved;
s3, sequentially adding acrylate, polyketone resin and nitrocellulose into a reaction kettle, and stirring at a high temperature and a high speed under the condition of condensation reflux until the materials are fully and uniformly mixed;
s4, closing the heating device, adding the nano silicon dioxide and the nano calcium carbonate into the reaction kettle, and stirring at a high speed until the nano silicon dioxide and the nano calcium carbonate are fully and uniformly mixed;
and S5, adding the auxiliary agent into the reaction kettle, and uniformly stirring at a high speed to obtain the wear-resistant polyurethane coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375954.0A CN113088114A (en) | 2021-04-08 | 2021-04-08 | Wear-resistant polyurethane coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110375954.0A CN113088114A (en) | 2021-04-08 | 2021-04-08 | Wear-resistant polyurethane coating and preparation method thereof |
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| CN113088114A true CN113088114A (en) | 2021-07-09 |
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| CN202110375954.0A Pending CN113088114A (en) | 2021-04-08 | 2021-04-08 | Wear-resistant polyurethane coating and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114437595A (en) * | 2022-03-24 | 2022-05-06 | 广东邦固化学科技有限公司 | Flexible transparent electric heating composite coating and preparation method thereof |
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2021
- 2021-04-08 CN CN202110375954.0A patent/CN113088114A/en active Pending
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| CN102391727A (en) * | 2011-10-09 | 2012-03-28 | 常州豪邦纳米科技涂料有限公司 | Transparent paint for stainless steel |
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| CN103045055A (en) * | 2012-12-12 | 2013-04-17 | 澳达树熊涂料(惠州)有限公司 | High-hardness unsaturated polyester full-bright top-coat paint and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114437595A (en) * | 2022-03-24 | 2022-05-06 | 广东邦固化学科技有限公司 | Flexible transparent electric heating composite coating and preparation method thereof |
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