CN104263348B - A kind of aqueous visible ray photochromic material for car film and preparation method thereof - Google Patents

Abstract

The invention discloses a water-based visible light photochromic material for car films and a preparation method thereof, which comprises the following components in weight percentage: 25-30% of the main photochromic material and 70-75% of the auxiliary photochromic material and the balance of water; the primary photochromic material is one or a mixture of tungstic acid and phosphomolybdic acid, and the secondary photochromic material is polyvinylpyrrolidone. The invention has the following beneficial effects: good fluidity, easy mechanical construction; simple construction operation, high construction efficiency; long service life of the car film, which can be used in construction above 5°C; excellent and reliable performance indicators of the invention; Any poisonous effect, safety and environmental protection; once the car film is used, it will not affect the performance of the window material, and will not cause secondary pollution to the environment; the invention is cheap and has a wide range of applications.

Description

A kind of water-based visible light photochromic material for car film and preparation method thereof

technical field

The invention relates to the field of car film materials, in particular to a water-based visible light photochromic material used for car film and a preparation method thereof.

Background technique

People who pay attention to China's auto industry know that my country's auto manufacturing industry has grown at an average rate of 24.5% in the past five years. April 1, 2014 - Jinghua Times (Reporter Yuan Guoli) According to the data provided by the Ministry of Public Security, as of the end of last year , my country's car ownership has reached 137 million, and the supporting car aftermarket will also become a huge "golden" market. With the increasing consumption of automobiles in China, the automobile film market has a large space. The situation of new car film is becoming more and more popular, and the profit space is unprecedentedly broad. It has become the highlight of the automobile supplies market.

my country's car film market has only been formed for a short period of more than ten years, and the market is quite chaotic. In a nutshell, there are several main manifestations of the chaos in the car film market: First, the purchase channels are chaotic, and there are a large number of small businesses and small workshops that make up the number. The above-mentioned "following famous brands" is a common trick of these companies, and this kind of "cottage" is also the most likely to confuse people and the world. Second, the cost is low and the profit is large, forming a "chain of huge profits". The profit of car film can be ten times or even dozens of times, so that there is a saying in the industry that "selling film is more profitable than selling cars".

Since its launch on the market, automotive film has gone through three stages: "tea paper", "explosion-proof film" and "sunscreen and heat insulation film". "Tea paper" belongs to the first generation of products, commonly known as solar film, which is characterized by strong shading and easy installation; the disadvantage is that it is not heat-insulated, easy to fade, and easy to degumming. "Explosion-proof film" is a second-generation product. It uses a new type of viscose and a thicker film layer to improve the explosion-proof effect. It has a certain heat insulation and sun protection performance. The heat insulation rate is between 20% and 60%, and the ultraviolet radiation is about 80%. "Sunscreen and heat insulation film" is the third-generation product. Compared with the previous two kinds of automotive films, the ultraviolet blocking rate of this film has increased to 90% to 100%, and the infrared blocking rate has increased to about 30% to 95%. The viscosity is stronger, so as to achieve the effect of reducing the thickness of the film and improving the explosion-proof performance. The "sunscreen and heat insulation film" is electroplated metal on the base film, while the general solar film is coated with a layer of color on the base film, and some ordinary explosion-proof films are coated with aluminum powder, so there is a big difference in reflective materials.

Contents of the invention

In order to solve the problem that the original car film cannot be degraded in a short time after being discarded and causes environmental pollution; in addition, the construction is inconvenient, the invention provides a water-based visible light photochromic material for car film and a preparation method thereof.

In order to achieve the above object, the technical scheme that the present invention takes is:

A water-based visible light photochromic material for car films, comprising components with the following weight percentages:

25-30% of the main photochromic material, 70-75% of the auxiliary photochromic material and the balance of water;

The primary photochromic material is one or a mixture of tungstic acid and phosphomolybdic acid, and the secondary photochromic material is polyvinylpyrrolidone.

The present invention also provides a preparation method of a water-based visible light photochromic material used for car film, comprising the following steps: mixing phosphotungstic acid and phosphomolybdic acid in a ratio of 4:1 to prepare a 5% polyacid aqueous solution 5-10 parts, the prepared 1% polyvinylpyrrolidone aqueous solution is added to 100 parts under the condition of stirring.

The present invention also provides a method for preparing a water-based visible light photochromic material for car film, comprising the following steps: preparing phosphotungstic acid into 5-10 parts of 5% polyacid aqueous solution, and mixing the prepared A good 1% aqueous solution of polyvinylpyrrolidone rounds up the parts to 100 parts.

The present invention also provides a preparation method of a water-based visible light photochromic material used for car films, comprising the following steps: preparing 5-10 parts of 5% polyacid aqueous solution with phosphomolybdic acid, and stirring the prepared A good 1% aqueous solution of polyvinylpyrrolidone rounds up the parts to 100 parts.

Wherein, in this specific implementation, after the photochromic material prepared by the present invention is covered on the surface of the car window by spraying, the B bottle varnish is sprayed to form a car window film, so as to achieve the purpose of anti-glare and make the driver feel comfortable. Clear vision ensures driving safety; Ethyl acetate can be used as a detergent for cleaning when replacing the car film.

The specific technical indicators are as follows:

Appearance: uniform fluid;

Color: The liquid in bottle A is light yellow, colorless after forming a film, and blue after being discolored by light; both bottles B and C are colorless;

Effective use period: t(time)≥1 year;

Water resistance: does not migrate when exposed to water;

Weather resistance performance: ≥ 5 ℃ can be used for construction;

Film thickness: 2～3μm;

According to the principle of photochromism, the invention makes the color change reaction of the car film under the condition of light, from colorless to blue, and has a good barrier effect on light intensity and ultraviolet rays. The materials used in this technology are environmentally friendly and reliable, not It will cause damage to the ecological environment and overcome the solid waste pollution caused by the original materials after use. Compared with other methods, this technology has the advantages of no pollution, easy operation, high efficiency, and no corrosion of workpieces. Its greater advantage is that the equipment is simple and easy to operate on site.

The present invention has the following beneficial effects:

Good fluidity, easy mechanical construction; simple construction operation, high construction efficiency; long service life of the car film, can be used in construction above 5 °C; excellent and reliable performance indicators of the invention; car film has no toxic effect, safe and environmentally friendly; Once the car film is used, it will not affect the performance of the car window material, and will not cause secondary pollution to the environment; the invention is cheap and has a wide range of applications.

detailed description

In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example 1

Preparation of bottle A: Mix phosphotungstic acid and phosphomolybdic acid at a ratio of 4:1 to prepare 5-10 parts of 5% polyacid aqueous solution, and mix the prepared 1% polyvinylpyrrolidone with stirring The aqueous solution makes up the parts to 100 parts.

Preparation of bottle B: outsourced.

Preparation of bottle C: use 100 parts of ethyl acetate.

In this specific implementation, under normal temperature conditions, bottle A is sprayed to cover the surface of the car window with a photochromic material composed of inorganic/polymer composite materials; bottle B is varnish, and bottle B is sprayed to form a car window The film can achieve the purpose of anti-glare, so that the driver has a clear vision and ensure the safety of driving; the C bottle is a detergent, which can be used for cleaning when replacing the car film.

After testing, the automobile film obtained in Example 1 can prevent glare, make the driver have a clear field of vision, ensure the safety of driving, can isolate 90% of ultraviolet rays, prevent the fading of the articles in the car and the aging of plastic and rubber parts, and can be used in automobiles. The super glue of the film can also stick the broken glass together to prevent secondary harm to people.

Example 2

Preparation of bottle A: Prepare 5-10 parts of 5% polyacid aqueous solution with phosphotungstic acid, and fill the prepared 1% polyvinylpyrrolidone aqueous solution to 100 parts under stirring.

Preparation of bottle B: outsourced.

Preparation of bottle C: use 100 parts of ethyl acetate.

In this specific implementation, under normal temperature conditions, bottle A is sprayed to cover the surface of the car window with a photochromic material composed of inorganic/polymer composite materials; bottle B is varnish, and bottle B is sprayed to form a car window The film can achieve the purpose of anti-glare, so that the driver has a clear vision and ensure the safety of driving; the C bottle is a detergent, which can be used for cleaning when replacing the car film.

After testing, the automobile film obtained in Example 2 can prevent glare, make the driver have a clear field of vision, ensure the safety of driving, can isolate 90% of ultraviolet rays, prevent the fading of the articles in the car and the aging of plastic and rubber parts, and can be used in automobiles. The super glue of the film can also stick the broken glass together to prevent secondary harm to people

Example 3

Preparation of bottle A: Prepare 5-10 parts of 5% polyacid aqueous solution with phosphomolybdic acid, and make up the parts to 100 parts with the prepared 1% polyvinylpyrrolidone aqueous solution under the condition of stirring.

Preparation of bottle B: outsourced.

Preparation of bottle C: use 100 parts of ethyl acetate.

In this specific implementation, under normal temperature conditions, bottle A is sprayed to cover the surface of the car window with a photochromic material composed of inorganic/polymer composite materials; bottle B is varnish, and bottle B is sprayed to form a car window The film can achieve the purpose of anti-glare, so that the driver has a clear vision and ensure the safety of driving; the C bottle is a detergent, which can be used for cleaning when replacing the car film.

After testing, the automobile film obtained in Example 3 can prevent glare, make the driver have a clear field of vision, ensure the safety of driving, can isolate 90% of ultraviolet rays, prevent the fading of articles in the car and the aging of plastic and rubber parts. The super glue of the film can also stick the broken glass together to prevent secondary harm to people

Example 4

Preparation of bottle A: Mix phosphotungstic acid and phosphomolybdic acid at a ratio of 4:1 to prepare 5-10 parts of 5% polyacid ethanol solution, and mix the prepared 1% polyvinyl Pyrrolidone ethanol solution to make up the number of parts to 100 parts.

Preparation of bottle B: outsourced.

Preparation of bottle C: use 100 parts of ethyl acetate.

In this specific implementation, under normal temperature conditions, bottle A is sprayed to cover the surface of the car window with a photochromic material composed of inorganic/polymer composite materials; bottle B is varnish, and bottle B is sprayed to form a car window film to achieve the purpose of anti-glare, so that the driver has a clear vision and ensure the safety of driving; bottle C is detergent, which can be used to clean the car film when replacing it.

After testing, the automobile film obtained in this embodiment 4 can prevent glare, make the driver have a clear field of vision, ensure the safety of driving, can isolate 90% of ultraviolet rays, prevent the fading of the articles in the car and the aging of plastic and rubber parts, and can be used in automobiles. The super glue of the film can also stick the broken glass together to prevent secondary harm to people.

Example 5

Preparation of bottle A: Prepare 5-10 parts of 5% polyacid ethanol solution with phosphotungstic acid, and fill the prepared 1% polyvinylpyrrolidone ethanol solution to 100 parts while stirring.

Preparation of bottle B: outsourced.

Preparation of bottle C: use 100 parts of ethyl acetate.

In this specific implementation, under normal temperature conditions, bottle A is sprayed to cover the surface of the car window with a photochromic material composed of inorganic/polymer composite materials; bottle B is varnish, and bottle B is sprayed to form a car window The film can achieve the purpose of anti-glare, so that the driver has a clear vision and ensure the safety of driving; the C bottle is a detergent, which can be used for cleaning when replacing the car film.

After testing, the automobile film obtained in Example 1 can prevent glare, make the driver have a clear field of vision, ensure the safety of driving, can isolate 90% of ultraviolet rays, prevent the fading of the articles in the car and the aging of plastic and rubber parts, and can be used in automobiles. The super glue of the film can also stick the broken glass together to prevent secondary harm to people.

Example 6

Preparation of bottle A: Prepare 5-10 parts of 5% polyacid ethanol solution with phosphomolybdic acid, and make up the number of parts to 100 parts with the prepared 1% polyvinylpyrrolidone ethanol solution under stirring.

Preparation of bottle B: outsourced.

Preparation of bottle C: use 100 parts of ethyl acetate.

In this specific implementation, under normal temperature conditions, bottle A is sprayed to cover the surface of the car window with a photochromic material composed of inorganic/polymer composite materials; bottle B is varnish, and bottle B is sprayed to form a car window The film can achieve the purpose of anti-glare, so that the driver has a clear vision and ensure the safety of driving; the C bottle is a detergent, which can be used for cleaning when replacing the car film.

After testing, the automobile film obtained in Example 1 can prevent glare, make the driver have a clear field of vision, ensure the safety of driving, can isolate 90% of ultraviolet rays, prevent the fading of the articles in the car and the aging of plastic and rubber parts, and can be used in automobiles. The super glue of the film can also stick the broken glass together to prevent secondary harm to people.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (1)

1. A preparation method for a water-based visible light photochromic material for car film, characterized in that it comprises the steps of: mixing phosphotungstic acid and phosphomolybdic acid with a ratio of 4: 1 to be mixed with 5% polyacid 5-10 parts of the aqueous solution, the prepared 1% polyvinylpyrrolidone aqueous solution is added to 100 parts under the condition of stirring.