CN118562287B - A kind of outdoor polyurethane simulated wood grain material and preparation method thereof - Google Patents

Abstract

The present invention relates to the technical field of composite material preparation, and discloses a kind of outdoor polyurethane simulated wood grain material and preparation method thereof, the material is composed of an outer layer, a modified layer and a main layer, wherein: the outer layer is composed of two components, wherein component A includes: polyether polyol, diisocyanate, hydrophilic chain extender, component B includes: modified HDI trimer; the modified layer is composed of two components, wherein component A includes: polyol, diisocyanate, component B includes: polyol, 1,4-butanediol, antioxidant, light stabilizer, surfactant and pigment. The three-layer structure of the material is obtained by using homemade raw materials, which can ensure that the material has stronger weather resistance and anti-aging performance during outdoor use, so as to give it a longer outdoor service life and avoid aging and brittleness during a shorter outdoor use period.

Description

A kind of polyurethane simulated wood grain material for outdoor use and preparation method thereof

Technical Field

The invention relates to the technical field of composite material preparation, and more specifically discloses an outdoor polyurethane simulated wood grain material and a preparation method thereof.

Background Art

With the rapid development of the construction, furniture and decoration industries, higher and higher requirements are placed on the aesthetics, durability and environmental protection of materials. Polyurethane materials have been widely used in various fields due to their excellent physical properties and processability. When used outdoors, the appearance of the polyurethane material needs to be made into wood grain so that the polyurethane material can better blend with the natural environment. The traditional practice is to paste wood grain patches on the surface of the polyurethane material, resulting in an appearance that is not realistic enough, and long-term outdoor use can easily cause the appearance to fade and turn yellow, which further leads to distortion. In addition, when traditional polyurethane materials are used outdoors, they often face problems such as poor weather resistance and easy aging, which makes it difficult to meet the market demand for high-quality outdoor materials.

Summary of the invention

The main technical problem solved by the present invention is to provide an outdoor polyurethane simulated wood grain material and a preparation method thereof, which can solve the problem that the traditional polyurethane material has an insufficiently realistic appearance and poor weather resistance and is easy to age.

To solve the above technical problems, according to one aspect of the present invention, more specifically, an outdoor polyurethane simulated wood grain material is provided, which is composed of an outer layer, a finishing layer and a main body layer, wherein:

The outer layer is composed of two components, wherein component A includes: polyether polyol, diisocyanate, hydrophilic chain extender, and component B includes: modified HDI trimer;

The modification layer is composed of two components, wherein component A includes: polyol and diisocyanate, and component B includes: polyol, 1,4-butanediol, antioxidant, light stabilizer, surfactant and pigment;

The main layer is composed of three components, among which component A includes: polyol, diisocyanate, component B includes: polyol, 1,4-butanediol, water, antioxidant, light stabilizer, surfactant and pigment, inorganic filler, and component C includes: reinforcing fiber, polyhydroxyacetate, nickel-1,2-dithiobenzothiadiazole coordination polymer.

Furthermore, the component B in the modification layer specifically includes the following components in parts by weight: 100 parts of polyol, 0.5-5 parts of 1,4-butanediol, 0.1-0.3 parts of antioxidant, 0.3-1.0 parts of light stabilizer, 0.3-3.0 parts of surfactant and pigment;

The B component in the main layer specifically includes the following components in parts by weight: 100 parts of polyol, 0.5-5 parts of 1,4-butanediol, 0.02-1 parts of water, 0.1-0.3 parts of antioxidant, 0.3-1.0 parts of light stabilizer, 0.3-3.0 parts of surfactant and pigment, 1-10 parts of inorganic filler, and the C component specifically includes the following components in parts by weight: 8-12 parts of reinforcing fiber, 1-3 parts of polyhydroxy acetate, and 0.5-2.5 parts of nickel-1,2-dithiobenzothiadiazole coordination polymer.

Furthermore, the A component of the outer layer is prepared by mixing and heating a polyether polyol, a diisocyanate and a hydrophilic chain extender, the A component of the modification layer is prepared by mixing and heating a polyol and a diisocyanate, and its NCO value is 3.0-9.0%, and the A component of the main layer is prepared by mixing and heating a polyol and a diisocyanate, and its NCO value is 3.0-11.0%.

Furthermore, the modified HDI trimer is composed of HDI trimer, polytetrafluoroethylene, graphene oxide and polyetheretherketone, and is specifically prepared as follows: HDI trimer, polytetrafluoroethylene and polyetheretherketone are mixed in a ratio of 5:3:1 to form a mixture, and then aged at 35-40°C for 10-15min, and then 1/3 of the mass of the mixture The graphene oxide is added to the mixture, and after fully stirring and mixing, the modified HDI trimer is obtained.

Furthermore, the preparation process of the reinforcing fiber is: firstly, the glass fiber and the modified aramid fiber are twisted in a ratio of 1:2 to form a fiber twisted wire, and then a cross-linking agent is sprayed on the surface of the fiber twisted wire, and the reinforcing fiber is obtained after drying.

Furthermore, the preparation process of the modified aramid fiber is as follows: the aramid fiber is hot-melted at 560-600°C to form an aramid fiber melt, and then nano-silicon oxide with a particle size of 10-20nm is added to the aramid fiber melt, and the ratio of the aramid fiber melt to the nano-silicon oxide is 3:1. After mixing evenly, the aramid fiber melt is placed in a spinner, and extruded through the spinneret to form a melt stream with a diameter of 70-100nm, and then the melt stream is cooled to form a modified aramid fiber.

According to another aspect of the present invention, there is provided a method for preparing an outdoor polyurethane simulated wood grain material, comprising the following steps:

S1. Making of silicone mold with wood grain: select wood with clear grain and suitable size, dry it, spray the release agent, and then pour room temperature vulcanized silicone rubber on the surface. After 24 hours of aging, demoulding can produce a silicone mold with wood grain on one side;

S2. Preparation of the outer layer of polyurethane simulated wood grain material: placing the silicone mold in a mold frame and heating it, with the wood grain side facing upward, spraying a release agent on the surface, and then evenly mixing the AB components of the outer layer according to a certain proportion, and applying them to the grain surface of the silicone mold by spraying or brushing to obtain the outer layer of polyurethane simulated wood grain material;

S3, preparation of polyurethane simulated wood grain material modification layer: after mixing the AB components of the modification layer evenly in proportion, apply them to the outer layer of the polyurethane simulated wood grain material by spraying or scraping to prepare the polyurethane simulated wood grain material modification layer;

S4, preparation of the main layer of polyurethane simulated wood grain material: after the ABC components of the main layer are mixed evenly in proportion, they are applied on the polyurethane simulated wood grain material modification layer by spraying or scraping to prepare the main layer of polyurethane simulated wood grain material;

S5. Demolding of finished product: After the maturation of each layer is completed, the product is removed from the silicone mold as a whole, so that the polyurethane simulated wood grain material can be obtained.

Furthermore, the wood in step S1 is made by weathered wood, carbonized wood or roughened wood.

Furthermore, in step S1, the thickness of the room temperature vulcanized silicone rubber poured on the wood surface is 3-10 mm.

The beneficial effects of the outdoor polyurethane simulated wood grain material and the preparation method thereof are as follows: by making a silicone mold with wood grains by yourself, and molding the homemade raw materials in the silicone mold with wood grains, the prepared polyurethane material can have a realistic wood grain appearance, and compared with the traditional method of directly pasting wood grain patches on polyurethane materials, the polyurethane material can be prevented from being used outdoors for a long time, resulting in the appearance fading and yellowing, and the wood grain patches falling off, thereby causing the appearance to be distorted. In addition, the three-layer structure of the material is obtained by using homemade raw materials, which can ensure that the material has stronger weather resistance and anti-aging performance during outdoor use, thereby giving it a longer outdoor service life and avoiding aging and brittleness during a shorter outdoor use period.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

Figure 1 is a diagram of a silicone mold with wood texture;

FIG2 is a diagram of a polyurethane simulated wood grain material after preparing each layer;

FIG3 is a finished product of polyurethane simulated wood grain material;

FIG. 4 is a partial view of the polyurethane simulated wood grain material.

DETAILED DESCRIPTION

The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

A polyurethane simulated wood grain material for outdoor use, comprising an outer layer, a decorative layer and a main body layer. The specific preparation process of the material is as follows:

(1) Select wood with clear texture and appropriate size (made by weathered wood, carbonized wood or roughened wood), dry it, spray the release agent on it, and then pour 3-10mm thick room temperature vulcanized silicone rubber on the surface. After 24 hours of aging, demolding can produce a silicone mold with wood texture on one side.

(2) Place the silicone mold in a mold frame and heat it, with the wood grain side facing upward, and spray a release agent on its surface. Then, mix the components of the outer layer evenly in proportion, and apply them to the texture surface of the silicone mold by spraying or brushing to obtain the outer layer of polyurethane simulated wood grain material.

(3) After the components of the modification layer are mixed evenly in proportion, they are applied to the outer layer of the polyurethane simulated wood grain material by spraying or scraping to obtain the polyurethane simulated wood grain material modification layer.

(4) After the components of the main layer are mixed evenly in proportion, they are coated on the polyurethane simulated wood grain material modification layer by spraying or scraping to obtain the polyurethane simulated wood grain material main layer.

(5) After all layers have been matured, the product is removed from the silicone mold as a whole, thereby obtaining a polyurethane simulated wood grain material.

Embodiment 1

The outer layer component A is prepared by mixing and heating polyether polyol, diisocyanate and hydrophilic chain extender. The outer layer component B is formed by mixing HDI trimer, polytetrafluoroethylene and polyetheretherketone in a ratio of 5:3:1, then aging at 35°C for 10 minutes, and then adding 1/3 of the mixture mass of graphene oxide into the mixture, and stirring and mixing thoroughly to obtain a modified HDI trimer.

The A component of the modification layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 3.0%. The B component of the modification layer is composed of 100 parts of polyol, 0.5 parts of 1,4-butanediol, 0.1 parts of antioxidant, 0.3 parts of light stabilizer, 0.3 parts of surfactant and pigment.

The A component of the main layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 3.0%. The B component of the main layer is composed of 100 parts of polyol, 0.5 parts of 1,4-butanediol, 0.02 parts of water, 0.1 parts of antioxidant, 0.3 parts of light stabilizer, 0.3 parts of surfactant and pigment, and 1 part of inorganic filler. The C component of the main layer is composed of 8 parts of reinforcing fiber, 1 part of polyhydroxyacetate, and 0.5 parts of nickel-1,2-dithiobenzothiadiazole coordination polymer. Among them:

The reinforcing fiber is obtained by twisting glass fiber and modified aramid fiber in a ratio of 1:2 to form fiber twisted wire, spraying a crosslinking agent on the surface of the fiber twisted wire, and drying it.

The modified aramid fiber is prepared by hot-melting the aramid fiber at 560°C to form an aramid fiber melt, and then adding nano-silicon oxide with a particle size of 10 nm to the aramid fiber melt. The ratio of the aramid fiber melt to the nano-silicon oxide is 3:1. After mixing evenly, the aramid fiber melt is put into a spinner, extruded through the spinneret to form a melt stream with a diameter of 70 nm, and then the melt stream is cooled to obtain the modified aramid fiber.

Embodiment 2

The outer layer component A is prepared by mixing and heating polyether polyol, diisocyanate and hydrophilic chain extender. The outer layer component B is formed by mixing HDI trimer, polytetrafluoroethylene and polyetheretherketone in a ratio of 5:3:1, then aging at 37°C for 13 minutes, and then adding 1/3 of the mixture by mass of graphene oxide into the mixture, and stirring and mixing thoroughly to obtain a modified HDI trimer.

The A component of the modification layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 5.6%. The B component of the modification layer is composed of 100 parts of polyol, 3.2 parts of 1,4-butanediol, 0.2 parts of antioxidant, 0.6 parts of light stabilizer, 2.1 parts of surfactant and pigment.

The A component of the main layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 7.0%. The B component of the main layer is composed of 100 parts of polyol, 3.4 parts of 1,4-butanediol, 0.36 parts of water, 0.2 parts of antioxidant, 0.5 parts of light stabilizer, 1.8 parts of surfactant and pigment, and 7 parts of inorganic filler. The C component of the main layer is composed of 10 parts of reinforcing fiber, 2 parts of polyhydroxyacetate, and 1.6 parts of nickel-1,2-dithiobenzothiadiazole coordination polymer. Among them:

The reinforcing fiber is obtained by twisting glass fiber and modified aramid fiber in a ratio of 1:2 to form fiber twisted wire, spraying a crosslinking agent on the surface of the fiber twisted wire, and drying it.

The modified aramid fiber is prepared by hot-melting the aramid fiber at 580°C to form an aramid fiber melt, and then adding nano-silicon oxide with a particle size of 15 nm to the aramid fiber melt. The ratio of the aramid fiber melt to the nano-silicon oxide is 3:1. After mixing evenly, the aramid fiber melt is put into a spinner, extruded through the spinneret to form a melt stream with a diameter of 90 nm, and then the melt stream is cooled to obtain the modified aramid fiber.

Embodiment 3

The outer layer component A is prepared by mixing and heating polyether polyol, diisocyanate and hydrophilic chain extender. The outer layer component B is formed by mixing HDI trimer, polytetrafluoroethylene and polyetheretherketone in a ratio of 5:3:1, then aging at 40°C for 15 minutes, and then adding 1/3 of the mixture mass of graphene oxide into the mixture, and stirring and mixing thoroughly to obtain a modified HDI trimer.

The A component of the modification layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 9.0%. The B component of the modification layer is composed of 100 parts of polyol, 5 parts of 1,4-butanediol, 0.3 parts of antioxidant, 1.0 parts of light stabilizer, 3.0 parts of surfactant and pigment.

The A component of the main layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 11.0%. The B component of the main layer is composed of 100 parts of polyol, 5 parts of 1,4-butanediol, 1 part of water, 0.3 parts of antioxidant, 1.0 parts of light stabilizer, 3.0 parts of surfactant and pigment, and 10 parts of inorganic filler. The C component of the main layer is composed of 12 parts of reinforcing fiber, 3 parts of polyhydroxyacetate, and 2.5 parts of nickel-1,2-dithiobenzothiadiazole coordination polymer. Among them:

The reinforcing fiber is obtained by twisting glass fiber and modified aramid fiber in a ratio of 1:2 to form fiber twisted wire, spraying a crosslinking agent on the surface of the fiber twisted wire, and drying it.

The modified aramid fiber is prepared by hot-melting the aramid fiber at 600°C to form an aramid fiber melt, and then adding nano-silicon oxide with a particle size of 20 nm to the aramid fiber melt. The ratio of the aramid fiber melt to the nano-silicon oxide is 3:1. After mixing evenly, the aramid fiber melt is put into a spinner, extruded through the spinneret to form a melt stream with a diameter of 100 nm, and then the melt stream is cooled to obtain the modified aramid fiber.

Comparative Example 1

The outer layer component A is prepared by mixing and heating polyether polyol, diisocyanate and hydrophilic chain extender. The outer layer component B is formed by mixing HDI trimer, polytetrafluoroethylene and polyetheretherketone in a ratio of 5:3:1, then aging at 40°C for 15 minutes, and then adding 1/3 of the mixture mass of graphene oxide into the mixture, and stirring and mixing thoroughly to obtain a modified HDI trimer.

The modification layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 9.0%.

The A component of the main layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 11.0%. The B component of the main layer is composed of 100 parts of polyol, 5 parts of 1,4-butanediol, 1 part of water, 0.3 parts of antioxidant, 1.0 parts of light stabilizer, 3.0 parts of surfactant and pigment, and 10 parts of inorganic filler. The C component of the main layer is composed of 12 parts of reinforcing fiber, 3 parts of polyhydroxyacetate, and 2.5 parts of nickel-1,2-dithiobenzothiadiazole coordination polymer. Among them:

The reinforcing fiber is obtained by twisting glass fiber and modified aramid fiber in a ratio of 1:2 to form fiber twisted wire, spraying a crosslinking agent on the surface of the fiber twisted wire, and drying it.

The modified aramid fiber is prepared by hot-melting the aramid fiber at 600°C to form an aramid fiber melt, and then adding nano-silicon oxide with a particle size of 20 nm to the aramid fiber melt. The ratio of the aramid fiber melt to the nano-silicon oxide is 3:1. After mixing evenly, the aramid fiber melt is put into a spinner, extruded through the spinneret to form a melt stream with a diameter of 100 nm, and then the melt stream is cooled to obtain the modified aramid fiber.

Comparative Example 2

The outer layer component A is prepared by mixing and heating polyether polyol, diisocyanate and hydrophilic chain extender. The outer layer component B is formed by mixing HDI trimer, polytetrafluoroethylene and polyetheretherketone in a ratio of 5:3:1, then aging at 40°C for 15 minutes, and then adding 1/3 of the mixture mass of graphene oxide into the mixture, and stirring and mixing thoroughly to obtain a modified HDI trimer.

The A component of the modification layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 9.0%. The B component of the modification layer is composed of 100 parts of polyol, 5 parts of 1,4-butanediol, 0.3 parts of antioxidant, 1.0 parts of light stabilizer, 3.0 parts of surfactant and pigment.

The A component of the main layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 11.0%. The B component of the main layer is composed of 12 parts of reinforcing fiber, 3 parts of polyhydroxyacetic acid ester, and 2.5 parts of nickel-1,2-dithiobenzothiadiazole coordination polymer. Among them:

The reinforcing fiber is obtained by twisting glass fiber and modified aramid fiber in a ratio of 1:2 to form fiber twisted wire, spraying a crosslinking agent on the surface of the fiber twisted wire, and drying it.

The modified aramid fiber is prepared by hot-melting the aramid fiber at 600°C to form an aramid fiber melt, and then adding nano-silicon oxide with a particle size of 20 nm to the aramid fiber melt. The ratio of the aramid fiber melt to the nano-silicon oxide is 3:1. After mixing evenly, the aramid fiber melt is put into a spinner, extruded through the spinneret to form a melt stream with a diameter of 100 nm, and then the melt stream is cooled to obtain the modified aramid fiber.

Comparative Example 3

The outer layer component A is prepared by mixing and heating polyether polyol, diisocyanate and hydrophilic chain extender. The outer layer component B is formed by mixing HDI trimer, polytetrafluoroethylene and polyetheretherketone in a ratio of 5:3:1, then aging at 40°C for 15 minutes, and then adding 1/3 of the mixture mass of graphene oxide into the mixture, and stirring and mixing thoroughly to obtain a modified HDI trimer.

The A component of the modification layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 9.0%. The B component of the modification layer is composed of 100 parts of polyol, 5 parts of 1,4-butanediol, 0.3 parts of antioxidant, 1.0 parts of light stabilizer, 3.0 parts of surfactant and pigment.

The A component of the main layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 11.0%. The B component of the main layer is composed of 100 parts of polyol, 5 parts of 1,4-butanediol, 1 part of water, 0.3 parts of antioxidant, 1.0 parts of light stabilizer, 3.0 parts of surfactant and pigment, and 10 parts of inorganic filler.

Comparative Example 4

The outer layer is prepared by mixing polyether polyol, diisocyanate and hydrophilic chain extender and heating them for reaction.

The A component of the modification layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 9.0%. The B component of the modification layer is composed of 100 parts of polyol, 5 parts of 1,4-butanediol, 0.3 parts of antioxidant, 1.0 parts of light stabilizer, 3.0 parts of surfactant and pigment.

The A component of the main layer is prepared by mixing and heating polyol and diisocyanate, and its NCO value is 11.0%. The B component of the main layer is composed of 100 parts of polyol, 5 parts of 1,4-butanediol, 1 part of water, 0.3 parts of antioxidant, 1.0 parts of light stabilizer, 3.0 parts of surfactant and pigment, and 10 parts of inorganic filler. The C component of the main layer is composed of 12 parts of reinforcing fiber, 3 parts of polyhydroxyacetate, and 2.5 parts of nickel-1,2-dithiobenzothiadiazole coordination polymer. Among them:

The reinforcing fiber is obtained by twisting glass fiber and modified aramid fiber in a ratio of 1:2 to form fiber twisted wire, spraying a crosslinking agent on the surface of the fiber twisted wire, and drying it.

The modified aramid fiber is prepared by hot-melting the aramid fiber at 600°C to form an aramid fiber melt, and then adding nano-silicon oxide with a particle size of 20 nm to the aramid fiber melt. The ratio of the aramid fiber melt to the nano-silicon oxide is 3:1. After mixing evenly, the aramid fiber melt is put into a spinner, extruded through the spinneret to form a melt stream with a diameter of 100 nm, and then the melt stream is cooled to obtain the modified aramid fiber.

Comparative Example 5

Wood grain patches are pasted on the surface of JYJB42-333-1000 polyurethane material by white latex to form outdoor polyurethane reverse wood grain material.

The outdoor polyurethane simulated wood grain materials prepared in Examples 1 to 3 and the outdoor polyurethane simulated wood grain materials prepared in Comparative Examples 1 to 5 were exposed to simulated outdoor ultraviolet radiation for 15 days, and a friction wheel made of rubber was arranged on the surface of the outdoor polyurethane simulated wood grain material, and rotated and rubbed with the material for 2 minutes at intervals of 30 minutes, so as to detect the yellowing ratio and mass loss of the outdoor polyurethane simulated wood grain material. At the same time, the surface water vapor resistance was tested according to the GB-17657 standard. Level 1: bubbling and/or delamination. Level 2: obvious changes in color and/or gloss. Level 3: moderate changes in color and/or gloss. Level 4: slight gloss and/or color changes can be seen when observed at a certain angle. Level 5: no changes.

Yellowing ratio = yellowing area / total exposed area of outdoor polyurethane simulated wood grain material.

Mass loss = mass of material before exposure - mass after the experiment.

The results are shown in the following table.

It can be seen from the above table that the outdoor polyurethane simulated wood grain material prepared by the present invention has excellent weather resistance, excellent wear resistance, and a long outdoor service life.

Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims (6)

1. The polyurethane simulated wood grain material for the outdoor use comprises an outer layer, a decoration layer and a main body layer, and is characterized in that:

the outer layer is composed of two components, wherein the A component comprises: polyether polyol, diisocyanate and hydrophilic chain extender, and the component B comprises: modified HDI trimer; wherein the component A is prepared by mixing, heating and reacting polyether polyol, diisocyanate and a hydrophilic chain extender;

The modified HDI trimer is composed of an HDI trimer, polytetrafluoroethylene, graphene oxide and polyether-ether-ketone, and specifically prepared as follows: mixing HDI trimer, polytetrafluoroethylene and polyether-ether-ketone according to the proportion of 5:3:1 to form a mixture, curing for 10-15min at 35-40 ℃, putting graphene oxide with the mass of 1/3 of that of the mixture into the mixture, and fully stirring and mixing to obtain a modified HDI trimer;

The modification layer is composed of two components, wherein the component A comprises: the component B comprises the following components in parts by weight: 100 parts of polyol, 0.5-5 parts of 1, 4-butanediol, 0.1-0.3 part of antioxidant, 0.3-1.0 part of light stabilizer, 0.3-3.0 parts of surfactant and pigment; wherein the component A is prepared by mixing and heating polyol and diisocyanate, and the NCO value of the component A is 3.0-9.0%;

The main body layer is composed of three components, wherein the component A comprises: the component B comprises the following components in parts by weight: 100 parts of polyol, 0.5-5 parts of 1, 4-butanediol, 0.02-1 part of water, 0.1-0.3 part of antioxidant, 0.3-1.0 part of light stabilizer, 0.3-3.0 parts of surfactant and pigment, 1-10 parts of inorganic filler, and the component C comprises the following components in parts by weight: 8-12 parts of reinforcing fiber, 1-3 parts of polyglycolic acid ester and 0.5-2.5 parts of nickel-1, 2-dithiobenzothiadiazole coordination polymer; wherein the component A is prepared by mixing and heating polyol and diisocyanate, and the NCO value of the component A is 3.0-11.0%.

2. The outdoor polyurethane simulated wood grain material of claim 1, wherein: the preparation process of the reinforcing fiber comprises the following steps: twisting glass fiber and modified aramid fiber according to the proportion of 1:2 to form fiber twisted yarn, spraying cross-linking agent on the surface of the fiber twisted yarn, and drying to obtain the reinforced fiber.

3. The outdoor polyurethane simulated wood grain material of claim 2, wherein: the preparation process of the modified aramid fiber comprises the following steps: the preparation method comprises the steps of carrying out hot melting on aramid fiber at 560-600 ℃ to form an aramid fiber melt, adding nano silicon oxide with the particle size of 10-20nm into the aramid fiber melt, mixing uniformly, putting the aramid fiber melt into a spinning machine, extruding the aramid fiber melt by the spinning machine to form melt trickle with the diameter of 70-100nm, and cooling the melt trickle to form the modified aramid fiber.

4. A method for preparing the outdoor polyurethane simulated wood grain material as claimed in any of claims 1-3, comprising the steps of:

S1, manufacturing a silica gel mold with wood grains: selecting wood with clear lines and proper size, drying, spraying a release agent, casting room temperature vulcanized silicone rubber on the surface, curing for 24 hours, and demolding to obtain a silica gel mold with wood lines on one surface;

S2, manufacturing an outer layer of polyurethane simulated wood grain material: heating a silica gel mold in a mold frame with a surface with wood grain upwards, spraying a release agent on the surface of the silica gel mold, uniformly mixing AB components of the outer layer according to a proportion, and coating the AB components on the texture surface of the silica gel mold in a spraying or brushing mode to obtain the polyurethane simulated wood grain material outer layer;

S3, manufacturing a polyurethane simulated wood grain material decorative layer: uniformly mixing AB components of the decorative layer according to a proportion, and coating the AB components on the outer layer of the polyurethane simulated wood grain material in a spraying or blade coating mode to prepare the polyurethane simulated wood grain material decorative layer;

S4, manufacturing a polyurethane simulation wood grain material main body layer: uniformly mixing ABC components of the main body layer in proportion, and coating the ABC components on the polyurethane simulated wood grain material modified layer in a spraying or blade coating mode to prepare the polyurethane simulated wood grain material main body layer;

s5, demolding a finished product: and after the curing of each layer is completed, the product is integrally taken off from the silica gel mold, so that the polyurethane simulated wood grain material can be obtained.

5. The method for preparing the outdoor polyurethane simulated wood grain material according to claim 4, which is characterized in that: the wood in the step S1 is prepared by adopting a mode of weathering wood, carbonized wood or wood roughening.

6. The method for preparing the outdoor polyurethane simulated wood grain material according to claim 4, which is characterized in that: in the step S1, the thickness of the room temperature vulcanized silicone rubber cast on the surface of the wood is 3-10mm.