阅读说明：本技术 一种丙烯酸树脂材料及其制备方法 (Acrylic resin material and preparation method thereof ) 是由 程文 于 2020-05-15 设计创作，主要内容包括：本发明公开了一种丙烯酸树脂材料,按重量份计,其制备原料包括：硝化棉5～15份、醛酮树脂1～5份、热塑性丙烯酸树脂1～5份、流平剂0.1～0.5份、增塑剂0.5～1份、溶剂80～90份。该材料通过硝化棉、醛酮树脂、热塑性丙烯酸树脂的配合使用,显著改善了绿色金属络合染料添加后在镀铝膜层上的附着力及耐水性,使镀铝膜表面呈现均匀的绿色,且不会掉漆。(The invention discloses an acrylic resin material which comprises the following raw materials in parts by weight: 5-15 parts of nitrocotton, 1-5 parts of aldehyde ketone resin, 1-5 parts of thermoplastic acrylic resin, 0.1-0.5 part of flatting agent, 0.5-1 part of plasticizer and 80-90 parts of solvent. The material is used by matching nitrocotton, aldehyde ketone resin and thermoplastic acrylic resin, so that the adhesion and water resistance of the added green metal complex dye on an aluminum plating film layer are obviously improved, the surface of the aluminum plating film is uniformly green, and paint can not be removed.)

1. The acrylic resin material is characterized by comprising the following raw materials in parts by weight: 5-15 parts of nitrocotton, 1-5 parts of aldehyde ketone resin, 1-5 parts of thermoplastic acrylic resin, 0.1-0.5 part of flatting agent, 0.5-1 part of plasticizer and 80-90 parts of solvent.

2. The acrylic material of claim 1 wherein the thermoplastic acrylic is an epoxy modified thermoplastic acrylic.

3. The acrylic resin material as claimed in claim 1, wherein the nitro-cotton has a nitrogen content of 10.5 to 12.5 wt%.

4. The acrylic resin material according to claim 1, wherein the aldehyde ketone resin has a hydroxyl value of 5 to 120 mgKOH/g.

5. The acrylic resin material according to claim 1, wherein the leveling agent is selected from one or more of a silicone leveling agent, an acrylate leveling agent, and a urethane leveling agent.

6. The acrylic resinous material of claim 1, wherein the plasticizer is selected from the group consisting of dibutyl phthalate, diethyl phthalate, tributyl citrate, acetyl tributyl citrate, diisobutyl succinate, and triethyl citrate.

7. The acrylic resin material according to any one of claims 1 to 6, wherein the solvent is one or more selected from a ketone solvent, an ester solvent, an alcohol solvent, and an ether solvent.

8. The acrylic resin material as claimed in claim 7, wherein the ester solvent is selected from one or more of ethyl acetate, ethyl formate, methyl acetate, butyl acetate, ethyl propionate.

9. The acrylic resin material as claimed in claim 7, wherein the alcoholic solvent is selected from a mixture of one or more of methanol, ethanol, isopropanol, butanol, pentanol.

10. A method for preparing the acrylic resin material as claimed in any one of claims 1 to 9, comprising the steps of: physically mixing the raw materials, and filtering.

Technical Field

The invention relates to the field of high polymer materials, in particular to an acrylic resin material and a preparation method thereof.

Background

Vacuum aluminizing refers to heating and melting aluminum metal until the aluminum metal is evaporated in a vacuum state, and aluminum atoms are condensed on the surface of the material to form an aluminum layer. The vacuum aluminum plating technology can enable the surface of the material to present a metallic luster feeling, so that the product package has a more design feeling, and is fashionable and attractive. In order to ensure the adhesion of the aluminum-plated layer, a primer is usually coated on the substrate, then aluminum plating is performed, and a finish paint with dye can be coated on the surface of the aluminum-plated layer to provide richer appearance design.

The dyes on the surface of the aluminum-plated layer are generally metal complex dyes, most colors have strong adhesion on the surface of the aluminum-plated layer and are not easy to fall off, however, because most metal ions in the green dyes are divalent metal ions, such as divalent nickel ions, the bonding force between a complex ligand and aluminum is weak, and the green metal complex dyes are added into the finish paint, so that the adhesion force, the water resistance and the like of a paint film are poor.

Disclosure of Invention

In order to solve the above problems, a first aspect of the present invention provides an acrylic resin material, which is prepared from the following raw materials in parts by weight: 5-15 parts of nitrocotton, 1-5 parts of aldehyde ketone resin, 1-5 parts of thermoplastic acrylic resin, 0.1-0.5 part of flatting agent, 0.5-1 part of plasticizer and 80-90 parts of solvent.

As a preferable technical scheme, the thermoplastic acrylic resin is epoxy modified thermoplastic acrylic resin.

As a preferable technical scheme, the nitrogen content of the nitrocotton is 10.5-12.5 wt%.

As a preferable technical scheme, the hydroxyl value of the aldehyde ketone resin is 5-120 mgKOH/g.

As a preferred technical solution, the leveling agent is selected from one or a mixture of more of an organosilicon leveling agent, an acrylate leveling agent and a polyurethane leveling agent.

As a preferred technical scheme, the plasticizer is selected from one or more of dibutyl phthalate, diethyl phthalate, tributyl citrate, acetyl tributyl citrate, diisobutyl succinate and triethyl citrate.

As a preferred technical solution, the solvent is one or more selected from ketone solvents, ester solvents, alcohol solvents, and ether solvents.

As a preferred technical scheme, the ester solvent is selected from one or more of ethyl acetate, ethyl formate, methyl acetate, butyl acetate and ethyl propionate.

As a preferred technical scheme, the alcohol solvent is selected from one or more of methanol, ethanol, isopropanol, butanol and pentanol.

A second aspect of the present invention provides a method for preparing the acrylic resin material as described above, comprising the steps of: physically mixing the raw materials, and filtering.

Has the advantages that: the invention provides an acrylic resin material, which is characterized in that by the matched use of nitrocotton, aldehyde ketone resin and thermoplastic acrylic resin, the adhesion and water resistance of a green metal complex dye on an aluminum plating film layer after the green metal complex dye is added are obviously improved, so that the surface of an aluminum plating film is uniformly green, and paint can not be removed.

Drawings

In order to further explain the advantages of the acrylic resin material and the preparation method thereof provided in the present invention, the accompanying drawings are provided, it should be noted that the drawings provided in the present invention are only selected individual examples in all drawings and are not intended to limit the claims, and all other corresponding diagrams obtained by the drawings provided in the present application should be considered as within the protection scope of the present application.

FIG. 1 is a picture of the phenomenon of paint falling when green metal complex dye is used on the surface of an aluminized film.

Detailed Description

The invention will be further understood by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definitions provided herein, the definition of the term provided herein controls.

As used herein, a feature that does not define a singular or plural form is also intended to include a plural form of the feature unless the context clearly indicates otherwise. It will be further understood that the term "prepared from …," as used herein, is synonymous with "comprising," including, "comprising," "having," "including," and/or "containing," when used in this specification means that the recited composition, step, method, article, or device is present, but does not preclude the presence or addition of one or more other compositions, steps, methods, articles, or devices. Furthermore, the use of "preferred," "preferably," "more preferred," etc., when describing embodiments of the present application, is meant to refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

In order to solve the above problems, a first aspect of the present invention provides an acrylic resin material, which is prepared from the following raw materials in parts by weight: 5-15 parts of nitrocotton, 1-5 parts of aldehyde ketone resin, 1-5 parts of thermoplastic acrylic resin, 0.1-0.5 part of flatting agent, 0.5-1 part of plasticizer and 80-90 parts of solvent.

Nitro-cotton (CAS number: 9004-70-0), also known as nitrocellulose, collodion of cotton body and the like, belongs to nitrate esters, is white or yellowish flocculent, and is a product of esterification reaction of cellulose and nitric acid.

In some preferred embodiments, the nitrogen content of the nitrocellulose is 10.5 to 12.5 wt%, and from the viewpoint of film forming strength of the material, it is further preferred that the nitrogen content of the nitrocellulose is 11.5 to 12.2 wt%.

The nitrogen content of the nitrocotton in the application is obtained by testing according to GJB 337-.

From the standpoint of balancing the solubility and film-forming properties of nitrocotton, in some preferred embodiments, the gauge of the nitrocotton is selected from a blend of one or more of 1/2, 1/4, 1/8, 1/16, 1/32; more preferably, the nitrocotton has a specification of 1/16.

The specification of the nitrocotton is related to the molecular weight of the nitrocotton and the viscosity of a nitrocotton solution, and the larger the denominator is, the smaller the viscosity of the nitrocotton solution is, and the larger the molecular weight of the nitrocotton is.

The nitrocotton in the application is purchased from northern nitrocotton GmbH in Sichuan, and the selectable models comprise H1/2a, H1/2b, H1/4a, H1/4b, H1/8a, H1/8b, H1/16 and H1/32.

From the viewpoint of improving water resistance, heat resistance and adhesion of a formed film, in some preferred embodiments, the aldehyde ketone resin has a hydroxyl value of 5 to 120 mgKOH/g; further preferably, the aldehyde ketone resin has a hydroxyl value of 110 mgKOH/g.

The hydroxyl number in this application refers to the number of milligrams of potassium hydroxide (KOH) equivalent to the hydroxyl groups in 1 gram of sample resin, expressed as mgKOH/g, and can be determined by any of the methods well known to those skilled in the art, such as titration.

The aldehyde ketone resins herein may be commercially available, such as TEGO VariPlus CA, TEGOVariPlus AK, TEGO VariPlus L K, and the like, produced by Wiegmann Gusai.

In some preferred embodiments, the thermoplastic acrylic resin is an epoxy-modified thermoplastic acrylic resin.

From the viewpoint of improving the film forming rate and the film forming strength, in some preferred embodiments, the acid value of the epoxy modified thermoplastic acrylic resin is 40 to 60 KOH/(mg/g); more preferably, the acid value of the epoxy modified thermoplastic acrylic resin is 50 to 60 KOH/(mg/g).

The acid value in this application refers to the number of milligrams of potassium hydroxide (KOH) required to neutralize a 1 gram sample of the resin, and the determination may be by any of the methods well known to those skilled in the art, such as titration.

The epoxy-modified thermoplastic acrylic resin in this application can be commercially available, for example, acrylic resin product L EADFO L A AK-470A manufactured by Shenzhen Ju Ye Xin trade Co., Ltd.

In some preferred embodiments, the weight ratio of the nitrocotton, the aldehyde ketone resin and the thermoplastic acrylic resin is (3-5): (0.5-1.5): 1.

the inventor finds that when the nitrocotton, the aldehyde ketone resin and the thermoplastic acrylic resin are used in a specific ratio, the obtained coating has high curing speed, excellent water resistance, strong adhesion and difficult cracking, and the reason is that the combination of the specific resin in the specific ratio can regulate and control the content and distribution of active groups in the material, and the active groups not only generate interaction in the curing process to form a film layer, but also can improve the bonding force between the material and a base material, and can also react with metal ions in a dye to improve the dye adhesion. If the content and distribution of the active group are out of the preferable ranges, there is a possibility that the hydrophilicity of the material is increased, resulting in deterioration of water resistance, or the film is hard and brittle and is liable to crack, or the adhesion of the dye is poor.

In some preferred embodiments, the leveling agent is selected from a mixture of one or more of silicone leveling agents, acrylate leveling agents, polyurethane leveling agents; further preferably, the leveling agent is an organic silicon leveling agent. The silicone levelling agent in the present application may be commercially available, for example the BYK series of products produced by BYK chemistry, germany.

In some preferred embodiments, the plasticizer is selected from a mixture of one or more of dibutyl phthalate, diethyl phthalate, tributyl citrate, acetyl tributyl citrate, diisobutyl succinate, triethyl citrate; further preferably, the plasticizer is diethyl phthalate.

In some preferred embodiments, the solvent is selected from one or more of ketone solvents, ester solvents, alcohol solvents, and ether solvents.

As the ketone solvent, one or a mixture of more of acetone, methyl ethyl ketone, methyl isobutyl ketone (MIBK), diisobutyl ketone (DIBK), cyclohexanone, and isophorone can be given.

The ester solvent may be one or a mixture of ethyl acetate, ethyl formate, methyl acetate, butyl acetate and ethyl propionate.

As the alcohol solvent, one or a mixture of more of methanol, ethanol, isopropanol, butanol, and pentanol may be exemplified.

The ether solvent may be one or a mixture of two or more of ethyl ether, tetrahydrofuran, ethylene glycol monobutyl ether, propylene glycol methyl ether, dipropylene glycol butyl ether, and methylal.

From the viewpoint of balancing raw material solubility, material stability, film forming rate and film forming uniformity, in some preferred embodiments, the solvent is a mixture of ethylene glycol monobutyl ether, butanol, butyl acetate, methylal and ethyl acetate, and the weight ratio is (1-2): (2-2.5): 1: (2-2.5): (2-2.5).

A second aspect of the present invention provides a method for preparing the acrylic resin material as described above, comprising the steps of: physically mixing the raw materials, and filtering.