阅读说明：本技术 一种氯醋树脂复合材料及其制备方法与应用 (Vinyl chloride-vinyl acetate resin composite material and preparation method and application thereof ) 是由 程文 于 2020-05-07 设计创作，主要内容包括：本发明公开了一种氯醋树脂复合材料,按重量份计,其制备原料包括：氯醋树脂10～15份、丙烯酸树脂3～7份、聚苯乙烯-丙烯酸共聚树脂2～4份、流平剂0.1～0.5份、增塑剂0.5～1份、溶剂70～90份。该氯醋树脂复合材料用于镀铝层的面漆,通过氯醋树脂、热塑性丙烯酸树脂、聚苯乙烯-丙烯酸树脂三者的配合使用,使得镀铝层的耐酒精性提高,同时漆膜亮度改善,镀层附着力强,能够长期保证不脱落。(The invention discloses a vinyl chloride-vinyl acetate copolymer composite material which comprises the following raw materials in parts by weight: 10-15 parts of vinyl chloride-vinyl acetate copolymer resin, 3-7 parts of acrylic resin, 2-4 parts of polystyrene-acrylic copolymer resin, 0.1-0.5 part of flatting agent, 0.5-1 part of plasticizer and 70-90 parts of solvent. The vinyl chloride-vinyl acetate copolymer composite material is used for the finish paint of the aluminum coating, and the vinyl chloride-vinyl acetate copolymer, the thermoplastic acrylic resin and the polystyrene-acrylic resin are used in a matching manner, so that the alcohol resistance of the aluminum coating is improved, the brightness of a paint film is improved, the adhesion of a coating is strong, and the aluminum coating can be prevented from falling off for a long time.)

1. The vinyl chloride-vinyl acetate copolymer composite material is characterized by comprising the following preparation raw materials in parts by weight: 10-15 parts of vinyl chloride-vinyl acetate copolymer resin, 3-7 parts of acrylic resin, 2-4 parts of polystyrene-acrylic copolymer resin, 0.1-0.5 part of flatting agent, 0.5-1 part of plasticizer and 70-90 parts of solvent.

2. The vinyl chloride-vinyl acetate composite material according to claim 1, wherein the weight ratio of vinyl chloride to vinyl acetate in the vinyl chloride-vinyl acetate composite material is (18-24): 1.

3. the vinyl chloride-acetate resin composite material according to claim 1, wherein the acrylic resin is a thermoplastic acrylic resin.

4. The vinyl chloride-vinyl acetate copolymer composite material of claim 1, wherein the polystyrene-acrylic copolymer resin has a weight-average molecular weight of 8000 to 13000.

5. The vinyl chloride-acetate resin composite material according to claim 1, wherein the leveling agent is one or more selected from the group consisting of an organic silicon leveling agent, an acrylate leveling agent, and a polyurethane leveling agent.

6. The vinyl chloride-vinyl acetate composite material according to claim 1 wherein said plasticizer is selected from the group consisting of dibutyl phthalate, diethyl phthalate, tributyl citrate, tributyl acetylcitrate, diisobutyl succinate, butyl acrylate, dibutyl fumarate, and triethyl citrate.

7. The vinyl chloride-vinyl acetate copolymer composite material according to any one of claims 1 to 6, wherein the solvent is one or more selected from ketone solvents, ester solvents, alcohol solvents and ether solvents.

8. The vinyl chloride-acetate copolymer composite material of claim 7, wherein the ester solvent is one or more selected from ethyl acetate, ethyl formate, methyl acetate, sec-butyl acetate and ethyl propionate.

9. A method for preparing a vinyl chloride-vinyl acetate copolymer composite material according to any one of claims 1 to 8, comprising the steps of: physically mixing the raw materials, and filtering.

10. Use of a vinyl chloride-vinyl acetate composite material according to any of claims 1 to 8 as a top coat for an electroplated aluminium layer.

Technical Field

The invention relates to the field of composite materials, in particular to a vinyl chloride-vinyl acetate copolymer composite material and a preparation method and application 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, and then aluminum-plated layer is coated, and a finish paint is also coated on the aluminum-plated layer for the purpose of providing a certain protection for the aluminum-plated layer.

Most of the finish paint used outside the aluminum plating layer is vinyl chloride-vinyl acetate resin at present, and the shrinkage rate of the finish paint and the shrinkage rate of the primer are not suitable for each other due to the large shrinkage of the vinyl chloride-vinyl acetate resin, so that the power failure plating layer is caused, or the phenomenon that the plating layer cannot fall off when a product is made but falls off after a period of time can also occur.

Disclosure of Invention

In order to solve the above problems, a first aspect of the present invention provides a vinyl chloride-vinyl acetate copolymer composite material, which is prepared from the following raw materials in parts by weight: 10-15 parts of vinyl chloride-vinyl acetate copolymer resin, 3-7 parts of acrylic resin, 2-4 parts of polystyrene-acrylic copolymer resin, 0.1-0.5 part of flatting agent, 0.5-1 part of plasticizer and 70-90 parts of solvent.

As a preferable technical scheme, the weight ratio of vinyl chloride to vinyl acetate in the vinyl chloride-vinyl acetate copolymer resin is (18-24): 1.

as a preferred embodiment, the acrylic resin is a thermoplastic acrylic resin.

As a preferable technical scheme, the weight average molecular weight of the polystyrene-acrylic acid copolymer resin is 8000-13000.

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, butyl acrylate, dibutyl fumarate 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, sec-butyl acetate and ethyl propionate.

The second aspect of the present invention provides a method for preparing a vinyl chloride-vinyl acetate copolymer composite material as described above, comprising the steps of: physically mixing the raw materials, and filtering.

A third aspect of the present invention provides a use of the vinyl chloride-vinyl acetate composite material as described above as a top coat for an electroplated aluminum layer.

Has the advantages that: the vinyl chloride-vinyl acetate copolymer composite material provided by the invention is used for the finish paint of the aluminum coating, and the vinyl chloride-vinyl acetate copolymer, the thermoplastic acrylic resin and the polystyrene-acrylic resin are used in a matching manner, so that the alcohol resistance of the aluminum coating is improved, the brightness of a paint film is improved, the adhesion of the coating is strong, and the aluminum coating can be prevented from falling off for a long time.

Drawings

In order to further explain the beneficial effects of the vinyl chloride-vinyl acetate copolymer composite material and the preparation method and application thereof provided by the invention, the corresponding drawings are provided, it should be noted that the drawings provided by the invention are only selected individual examples from all the drawings and are not intended to be limiting for the claims, and all other corresponding diagrams obtained through the drawings provided by the application should be considered to be within the protection scope of the application.

FIG. 1 shows the adhesion test of the plating layer of example 1 of the present invention, wherein the left graph shows that the plating layer is adhered by the adhesive tape before the test, and the right graph shows that the test result shows that the plating layer is adhered by the adhesive tape after the test.

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 a vinyl chloride-vinyl acetate copolymer composite material, which is prepared from the following raw materials in parts by weight: 10-15 parts of vinyl chloride-vinyl acetate copolymer resin, 3-7 parts of acrylic resin, 2-4 parts of polystyrene-acrylic copolymer resin, 0.1-0.5 part of flatting agent, 0.5-1 part of plasticizer and 70-90 parts of solvent.

In some preferred embodiments, the vinyl chloride-vinyl acetate weight ratio in the vinyl chloride-vinyl acetate copolymer is (18-24): 1; further preferably, the weight ratio of vinyl chloride to vinyl acetate in the vinyl chloride-vinyl acetate copolymer is 22.5: 1. the vinyl chloride-vinyl acetate copolymer herein may be commercially available, for example, vinyl chloride-vinyl acetate copolymer VAGH produced by Dow chemical.

In some preferred embodiments, the acrylic resin is a thermoplastic acrylic resin. The thermoplastic acrylic resin herein may be commercially available, for example, BR-113, BR-106, BR-116, BR-73, BR-85, MB-2952, MB-2660, MB-7143, BR-77, etc., which are produced by Mitsubishi chemical.

In some preferred embodiments, the polystyrene-acrylic copolymer resin has a weight average molecular weight of 8000 to 13000. The polystyrene-acrylic copolymer resin in the present application may be commercially available, for example, Joncryl series products produced by Basff.

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, butyl acrylate, dibutyl fumarate, triethyl citrate; further preferably, the plasticizer is dibutyl phthalate.

In some preferred embodiments, the solvent is selected from one or more of ketone solvents, ester solvents, alcohol solvents, and ether solvents; further preferably, the solvent is a mixture of a ketone solvent and an ester solvent.

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.

As the ester solvent, one or a mixture of more of ethyl acetate, ethyl formate, methyl acetate, sec-butyl acetate, and ethyl propionate may be exemplified.

In some preferred embodiments, the solvent is a mixture of diisobutyl ketone, methyl isobutyl ketone, butanone, sec-butyl acetate and ethyl acetate, and the weight ratio is (2-2.5): (1-1.5): (1-1.5): (1.5-2.5): 1.

the inventor finds that the polystyrene-acrylic acid copolymer resin is introduced into the vinyl chloride-vinyl acetate copolymer resin, so that the adhesive force between the vinyl chloride-vinyl acetate copolymer resin and the electroplated aluminum layer is ensured, the shrinkage of the finish paint can be well controlled, and the phenomenon of falling off of a coating layer can be avoided.

The second aspect of the present invention provides a method for preparing a vinyl chloride-vinyl acetate copolymer composite material as described above, comprising the steps of: physically mixing the raw materials, and filtering.

A third aspect of the present invention provides a use of the vinyl chloride-vinyl acetate composite material as described above as a top coat for an electroplated aluminum layer.