CN114292440B

CN114292440B - Composite light stabilizer, plastic-wood composite material composition and plastic-wood product

Info

Publication number: CN114292440B
Application number: CN202111675702.6A
Authority: CN
Inventors: 姚广; 安平; 罗海; 李海平
Original assignee: Rianlon Corp
Current assignee: Rianlon Corp
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-11-10
Anticipated expiration: 2041-12-31
Also published as: CN114292440A

Abstract

The invention provides a composite light stabilizer, a plastic-wood composite material composition and a plastic-wood product, and relates to the technical field of light stabilizers. The composite light stabilizer provided by the invention comprises: an ultraviolet absorber and a hindered amine light stabilizer, wherein the mass ratio of the ultraviolet absorber to the hindered amine light stabilizer is (10-80) (60-10); wherein the ultraviolet absorber is selected from at least one of UV326, UV329, UV-P, UV-1164 or UV-2908; the hindered amine light stabilizer is selected from at least one of UV-622, UV-944, UV-2020, or UV-3853. According to the invention, the ultraviolet absorber and the hindered amine light stabilizer of specific types are selected to be compounded and added into the plastic-wood composite material, so that the ultraviolet absorber and the hindered amine light stabilizer can be matched with the plastic base material in a synergistic manner, the weather resistance of the plastic-wood composite material is obviously improved, and the service life of the plastic-wood composite material is prolonged while the attractive appearance of the plastic-wood composite material is maintained.

Description

Composite light stabilizer, plastic-wood composite material composition and plastic-wood product

Technical Field

The invention relates to the technical field of light stabilizers, in particular to a composite light stabilizer, a plastic-wood composite material composition and a plastic-wood product.

Background

The plastic-wood composite material is a basic material with reversible cyclic utilization and various morphological structures, which is formed by mixing a certain proportion of plastic base materials by taking primary biomass materials such as wood chips, bamboo chips, wheat straws, chaff, peanut shells, cotton straws and the like as main materials and utilizing the chemical principle of a high molecular interface and the characteristic of plastic filling modification. Because the plastic-wood composite material is used outdoors and is irradiated by light for a long time, the plastic-wood composite material is easy to generate photo-aging, so that the problems of deformation, fracture, fading and the like are caused, and the use and the appearance are affected.

In view of this, the present invention has been made.

Disclosure of Invention

The invention mainly aims to provide a composite light stabilizer for a plastic-wood composite material, a plastic-wood composite material composition and a plastic-wood product, so as to solve the problems that the plastic-wood composite material in the prior art is easy to age, deform, fracture and fade due to long-term irradiation of light.

In order to achieve the above object, according to one aspect of the present invention, there is provided a composite light stabilizer comprising: ultraviolet absorber and hindered amine light stabilizer, and the mass ratio of the ultraviolet absorber to the hindered amine light stabilizer is (10-80): (60-10);

Wherein the ultraviolet absorbent is at least one selected from 2- (2 '-hydroxy-3' -tert-butyl-5 '-methylphenyl) -5-chlorobenzotriazole, 2- (2' -hydroxy-5 '-tert-octylphenyl) benzotriazole, 2- (2' -hydroxy-5-methylphenyl) benzotriazole, 2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol or 3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzoate; the hindered amine light stabilizer is selected from the group consisting of N, polymers of the reaction product of N' -bis (2, 6-tetramethyl-4-piperidinyl) -1, 6-hexanediamine with 2,4, 6-trichloro-1, 3, 5-triazine and N-butyl-1-butylamine and N-butyl-2, 6-tetramethyl-4-piperidinamine poly (4-hydroxy-2, 6-tetramethyl-1-piperidineethanol) succinate Poly (4-hydroxy-2, 6-) tetramethyl-1-piperidineethanol) ester.

Further, the ultraviolet absorber is selected from 2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol and/or 3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzoate; the hindered amine light stabilizer is selected from the group consisting of N, polymers of the reaction product of N' -bis (2, 6-tetramethyl-4-piperidinyl) -1, 6-hexanediamine with 2,4, 6-trichloro-1, 3, 5-triazine and N-butyl-1-butylamine and N-butyl-2, 6-tetramethyl-4-piperidinamine and/or the 2, 6-tetramethyl-4-piperidinyl ester.

Further, the mass ratio of the ultraviolet absorber to the hindered amine light stabilizer is (40 to 50): (40-30).

Further, the composite light stabilizer also includes a light shielding agent.

Further, the composite light stabilizer comprises, by mass, 10% -30% of a light shielding agent, 10% -80% of an ultraviolet absorber and 10% -60% of a hindered amine light stabilizer.

Further, the composite light stabilizer comprises: 10-30% of light shielding agent, 40-50% of ultraviolet absorber and 30-40% of hindered amine light stabilizer.

Further, the light shielding agent includes nano-sized zinc oxide and/or nano-sized titanium dioxide.

According to another aspect of the present invention there is provided a plastic-wood composite composition comprising a plastic base, a biomass material and a light stabilizer, the light stabilizer being any one of the composite light stabilizers provided above.

Further, the mass ratio of the plastic base material to the light stabilizer is 100 (0.05-1.2), preferably 100 (0.1-1).

Further, the mass ratio of the plastic base material to the biomass material is 100 (5-20), preferably 100 (8-12).

Further, the plastic base comprises at least one of PE, PP, ASA, EVA or ASA-PVC copolymer.

Further, the biomass material comprises at least one of wood flour, bamboo chips, wheat straw, bran, peanut shells or cotton stalks.

Further, the plastic-wood composite composition further comprises an auxiliary agent, wherein the auxiliary agent comprises at least one of a lubricant, an antioxidant or a pigment.

According to a third aspect of the present application there is provided a plastic-wood product, at least the exposed surface of which comprises any of the composite light stabilizers provided above.

Further, the plastic-wood product is a co-extruded wood product comprising a skin layer prepared from any one of the plastic-wood composite compositions provided above.

By applying the technical scheme of the application, the ultraviolet absorber and the hindered amine light stabilizer of specific types are selected to be compounded and added into the plastic-wood composite material, so that the ultraviolet absorber and the hindered amine light stabilizer can be matched with the plastic base material in a synergistic manner, the weather resistance of the plastic-wood composite material is obviously improved, and the service life of the plastic-wood composite material is prolonged while the attractive appearance of the plastic-wood composite material is maintained.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The present application will be described in detail with reference to examples.

As analyzed in the background art of the present application, the existing plastic-wood composite material is used outdoors, is easily photo-aged after long-term irradiation, causes problems of deformation, fracture, discoloration, etc., affects the use and the beauty, and provides a composite light stabilizer, a plastic-wood composite material composition and a plastic-wood product in order to solve the problems.

In one exemplary embodiment of the present application, there is provided a composite light stabilizer comprising: an ultraviolet absorber and a hindered amine light stabilizer, wherein the mass ratio of the ultraviolet absorber to the hindered amine light stabilizer is (10-80) (60-10); wherein the ultraviolet absorber is selected from any one or a mixture of at least two of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole, 2- (2 ' -hydroxy-5 ' -tert-octylphenyl) benzotriazole, a polymer of the reaction product of 2- (2 ' -hydroxy-5-methylphenyl) benzotriazole, 2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol or 3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzoate with 2- (2 ' -hydroxy-3 ' -tert-butylphenyl) -5-chlorobenzotriazole, a polymer of the reaction product of 2- (2 ' -hydroxy-5 ' -octylphenyl) benzotriazole, 2- (2, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-octyloxyphenol or 3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzoate with N, N ' -bis (2, 6-tetramethyl-4-piperidinyl) -1, 6-hexamethylenediamine with 2,4, 6-trichloro-1, 3, 5-triazine and N-butyl-1-butylamine, poly (4-hydroxy-2, 6-tetramethyl-1-piperidyl) -4-hydroxypiperidine, poly (4-hydroxy-1, 6-tetramethyl-piperidyl) -1, 6-tetramethyl-amino-1- [2, 6-tetramethyl-4-piperidinyl ] -amino ] -2, 6-tetramethyl-4-piperidinyl) -amine Or any one or a mixture of at least two of 2, 6-tetramethyl-4-piperidinyl esters.

In the present application, 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methylphenyl) -5-chlorobenzotriazole is CAS No.3896-11-5, abbreviated as UV-326;2- (2 '-hydroxy-5' -tert-octylphenyl) benzotriazole is CAS No.3147-75-9, abbreviated as UV-329;2- (2' -hydroxy-5-methylphenyl) benzotriazole is CAS No.2440-22-4, abbreviated as UV-P;2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol is CAS No.2725-22-6, abbreviated as UV-1164; the hexadecyl 3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzoate is CAS No.67845-93-6, which is called UV-2908 for short; poly (4-hydroxy-2, 6-tetramethyl-1-piperidineethanol) succinate is CAS No.65447-77-0, called UV-622 for short; poly- { [6- [ (1, 3-tetramethylbutyl) -imino ] -1,3, 5-triazin-2, 4-diyl ] [2- (2, 6-tetramethyl-e piperidinyl) -amino ] -hexylene- [4- (2, 6-tetramethylpiperidinyl) -imino ] } is CAS No.70624-18-9, abbreviated as UV-944; the polymer of the reaction product of N, N' -bis (2, 6-tetramethyl-4-piperidinyl) -1, 6-hexanediamine with 2,4, 6-trichloro-1, 3, 5-triazine and N-butyl-1-butylamine and N-butyl-2, 6-tetramethyl-4-piperidylamine is CAS No.192268-64-7, abbreviated UV-2020; the 2, 6-tetramethyl-4-piperidinyl ester is CAS No.167078-06-0, abbreviated as UV-3853.

The composite light stabilizer provided by the application selects a specific type of ultraviolet absorber and hindered amine light stabilizer to be compounded, and is added into the plastic-wood composite material, so that the composite light stabilizer can be matched with a plastic base material in a synergistic manner, the weather resistance of the plastic-wood composite material is obviously improved, the attractive appearance of the plastic-wood composite material is maintained, and the service life of the plastic-wood composite material is prolonged.

Typically, but not by way of limitation, the present application provides a composite light stabilizer wherein the mass of the ultraviolet absorber and hindered amine light stabilizer is, for example, 10:60, 20:60, 30:60, 40:50, 40:40, 40:30, 50:20, 50:30, 50:40, 60:10, 60:20, 60:30, 70:10, 70:20, or 80:10.

In some embodiments of the application, the ultraviolet light absorber is selected from UV-1164 and/or UV-2908, the hindered amine light stabilizer is selected from UV-2020 and/or UV-3853, for example, the light composite stabilizer is a composition of UV-1164 and UV-2020, a composition of UV-1164 and UV-3853, a composition of UV-2908 and UV-2020, or a composition of any one of or at least two of the compositions of UV2908 and UV-3853, after the hindered amine light stabilizer is added into the plastic-wood composite material, the ageing resistance time and the service life are longer, and the weather resistance is better.

In some embodiments of the application, the mass ratio of the ultraviolet absorber to the hindered amine light stabilizer is (40-50): (40-30), and the light composite stabilizer formed by the two components in a matched manner has more remarkable synergistic effect with the plastic base material after being added into the plastic-wood composite material, and can more effectively improve the weather resistance of the plastic-wood composite material.

In some embodiments of the present application, the composite light stabilizer further comprises a light shielding agent, and the light shielding agent is matched with a specific kind of ultraviolet light absorber and a specific kind of hindered amine light stabilizer to further improve the weather resistance of the plastic-wood composite material and prolong the service life of the plastic-wood composite material.

In some embodiments of the present application, the composite light stabilizer comprises, in mass percent: when 10-30% of light shielding agent, 10-80% of ultraviolet light absorber and 10-60% of hindered amine light stabilizer are matched, the formed composite light stabilizer is added into the plastic-wood composite material, the weather resistance of the plastic-wood composite material is obviously improved, and especially when the content of the light shielding agent is 10-30%, the content of the ultraviolet light absorber is 40-50% and the content of the hindered amine light stabilizer is 30-40%, the weather resistance of the plastic-wood composite material is particularly excellent after the composite light stabilizer is added into the plastic-wood composite material, and the service life is longer.

Typically, but not by way of limitation, in the present application provides a compound light stabilizer having a light shielding agent content of, for example, 10%, 15%, 20%, 25% or 30%; the content of the ultraviolet absorber is, for example, 10%, 20%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 70% or 80%; the content of the hindered amine light stabilizer is, for example, 10%, 20%, 25%, 30%, 35%, 40%, 45%, 50% or 60%.

In some embodiments of the present application, any agent capable of functioning as a light shielding agent can be used, but for some plastic-wood composites requiring color, it is preferable to use a light-colored or white light shielding agent, such as any one or a combination of two of nano titanium dioxide or nano zinc oxide.

In one exemplary embodiment of the present application, a plastic-wood composite composition is provided comprising a plastic base, a biomass material, and a light stabilizer, which is a composite light stabilizer provided above.

In the application, biomass material refers to a new material which is prepared from woody plants, gramineous plants, vine plants, processing residues and wastes thereof as raw materials by high-technology means such as physics, chemistry and biology, and has excellent processing performance and high added value.

According to the plastic-wood composite material composition provided by the application, the light stabilizer, the plastic base material and the biomass material are mutually synergistic, so that the prepared plastic-wood composite material has excellent light resistance, the weather resistance of the plastic-wood composite material can be obviously improved, and the service life of the plastic-wood composite material is prolonged.

In some embodiments of the application, when the mass ratio of the plastic base material to the light stabilizer is 100 (0.05-1.2), the prepared plastic-wood composite material has excellent weather resistance, and particularly when the mass ratio of the plastic base material to the light stabilizer is 100 (0.1-1), the prepared plastic-wood composite material has better weather resistance.

Typically, but not by way of limitation, in the plastic-wood composite compositions provided herein, the mass of plastic base to light stabilizer is, for example, 100:0.05, 100:0.1, 100:0.2, 100:0.5, 100:0.8, 100:1, or 100:1.2.

In some embodiments of the present application, any polymer that can be used to prepare plastics can be used as a plastic base, including, but not limited to, any one or a mixture of several of PE (polyethylene), PP (polypropylene), ASA (terpolymer of acrylonitrile, styrene and acrylic rubber), EVA (ethylene vinyl acetate copolymer) or ASA-PVC (ASA-polyvinyl chloride) copolymer. When the plastic base material is ASA, EVA or ASA-PVC, the prepared plastic-wood composite material has more excellent weather resistance.

The number average molecular weight of the plastic base materials is not limited, so long as the plastic base materials can be used for preparing plastic-wood products, for example, the number average molecular weight of PE is in the range of 5-80 ten thousand, and the melt index (210 ℃/2.16 kg) of PP is in the range of 1-1.5g/10 min.

In some embodiments of the present application, any biomass material can be used as a raw material for the plastic-wood composite material, and particularly when the biomass material is wood flour, bamboo chips, wheat straw, bran, peanut shells or cotton stalks, the raw material is more widely available and the cost is lower.

In some embodiments of the present application, the mass ratio of plastic base material to biomass material in the plastic-wood composite composition is 100: and (5-20), the prepared plastic-wood composite material is attractive in appearance and good in weather resistance, and particularly when the mass ratio of the plastic base material to the biomass material is 100: and (8-12), the prepared plastic-wood composite material is more attractive and better in weather resistance.

Typically, but not by way of limitation, the mass of plastic binder to biomass material is, for example, 100:5, 100:7:100:8, 100:9, 100:10, 100:11, 100:12, 100:15, 100:18, or 100:20.

Of course, in the plastic-wood composite composition, the mass ratio of the plastic base material to the biomass material can be 100: (100-200), when the mass ratio of the plastic base material to the biomass material is 100: (100-200) the wood-plastic composite composition may be used in a base stock for non-co-extruded wood or in a base stock for co-extruded wood-plastic core.

In some embodiments of the present application, the plastic-wood composite composition further includes an auxiliary agent, the type of the auxiliary agent is not limited, and any auxiliary agent capable of improving the performance of the plastic-wood composite can be added to the plastic-wood composite composition as a raw material. From the viewpoint of processability, the auxiliary agent contains a lubricant, from the viewpoint of oxidation resistance, the auxiliary agent contains an antioxidant, and from the viewpoint of aesthetic properties, the auxiliary agent contains a toner.

The toner is not particularly limited, and commercially available toners may be used, for example, HIFIFAST YELLOW HF G of Anshan colorful chemical Co., ltd., N550 of Kabot, cinilex DPP Red SR P of CINIC or AEROXIDE P25 of Yingchang.

In an exemplary embodiment of the present application, a plastic-wood product is provided, and at least the exposed surface of the plastic-wood product includes any one of the above-provided composite light stabilizers.

At present, the plastic wood products are mainly divided into two major types of co-extrusion wood products and common plastic wood products, and the greatest difference between the co-extrusion wood products and the common plastic wood products is that the co-extrusion wood products are provided with a skin layer on the common plastic wood products, so that the co-extrusion wood products have more excellent stain resistance and mildew resistance, and the application scene is wider.

The plastic wood product provided by the application comprises a co-extrusion wood product and a common plastic wood product, wherein when the plastic wood product is the co-extrusion wood product, the surface layer of the plastic wood product comprises the composite light stabilizer provided by the above, and when the plastic wood product is the common plastic wood product (non-co-extrusion wood product), the whole plastic wood product comprises the composite light stabilizer provided by the above.

The plastic-wood product provided by the application is prepared from the plastic-wood composite material composition, so that the plastic-wood product provided by the application has excellent light resistance and good weather resistance when being used outdoors for a long time, and the service life is effectively prolonged.

In some embodiments of the present application, the plastic-wood product is a co-extrusion wood product, and when the skin layer of the co-extrusion wood product is prepared from the plastic-wood composite material composition, the weather resistance, stain resistance and mildew resistance of the plastic-wood product are all more excellent, and the requirements of various application scenarios can be met.

The advantageous effects of the present application will be further described below with reference to examples and comparative examples.

In the following examples and comparative examples, "%" is abbreviated as "wt%", and "parts" is abbreviated as "parts by mass". The performance index or manufacturer's model of the raw materials used in examples and comparative examples are shown in table 1 below, and raw materials not listed in table 1 are commercially available.

TABLE 1 raw materials Performance index or manufacturer model Table

Example 1

The present example provides a color chip for use as a skin layer for co-extruded wood products, prepared according to the following steps:

(1) Premixing 100 parts of polyethylene, 10 parts of wood powder, 0.1 part of lubricant ethylene bis-stearic acid, 1 part of toner and 0.5 part of light stabilizer to obtain premix, wherein the light stabilizer consists of UV-329 and UV-944, the content of the UV-329 is 50%, and the content of the UV-944 is 50%;

(2) Feeding the premix into a double-screw extruder, and carrying out melt mixing granulation under the condition that the temperature of a charging barrel is 200 ℃ to obtain plastic-wood raw material particles;

(3) And (5) carrying out injection molding on the plastic-wood raw material particles to obtain the color chips with the thickness of 2 mm.

Example 2

The present embodiment provides a color chip, which has the same structural shape as the color chip provided in embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-329, UV-944 and nano zinc oxide, wherein the content of UV-329 is 50%, the content of UV-944 is 40%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 3

The present embodiment provides a color chip, and the color chip has the same structural shape as the color chip provided in embodiment 1, and is different from embodiment 1 in that EVA is used to replace polyethylene, and the other raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 4

The present embodiment provides a color chip, which has the same structural shape as the color chip provided in embodiment 3, and is different from embodiment 3 in that the light stabilizer consists of UV-329, UV-944 and nano zinc oxide, wherein the content of UV-329 is 50%, the content of UV-944 is 40%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 3, and are not described herein.

Example 5

The present embodiment provides a color chip, which has the same structural shape as the color chip provided in embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-P and UV-622, wherein the content of UV-P is 50%, the content of UV-622 is 50%, and the rest of the raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 6

The present embodiment provides a color chip, which has the same structural shape as the color chip provided in embodiment 5, and is different from embodiment 5 in that the light stabilizer consists of UV-P, UV-622 and nano zinc oxide, wherein the content of UV-P is 50%, the content of UV-622 is 40%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 5, and are not described herein.

Example 7

The present embodiment provides a color chip, which has the same structural shape as the color chip provided in embodiment 1, and is different from embodiment 1 in that ASA is adopted to replace polyethylene, the light stabilizer is composed of UV-P and UV-622, the content of UV-P is 50%, the content of UV-622 is 50%, and the rest of raw materials and the preparation method are the same as embodiment 1, and are not repeated herein.

Example 8

The present embodiment provides a color chip, which has the same structural shape as the color chip provided in embodiment 7, and is different from embodiment 7 in that the light stabilizer consists of UV-P, UV-622 and nano zinc oxide, wherein the content of UV-P is 50%, the content of UV-622 is 40%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 7, and are not described herein.

Example 9

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-326 and UV-622, wherein the content of UV-326 is 58%, the content of UV-622 is 42%, and the rest of the raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 10

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 9, and is different from embodiment 9 in that the light stabilizer consists of UV-326, UV-622 and nano zinc oxide, wherein the content of UV-326 is 40%, the content of UV-622 is 30%, the content of nano zinc oxide is 30%, and the rest of raw materials and the preparation method thereof are the same as embodiment 9, and are not described herein.

Example 11

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that ASA-PVC is used to replace polyethylene, the light stabilizer is composed of UV-326 and UV-622, the content of UV-326 is 58%, the content of UV-622 is 42%, and the rest of the raw materials and the preparation method are the same as embodiment 1, and are not repeated herein.

Example 12

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 11, and is different from embodiment 11 in that the light stabilizer consists of UV-326, UV-622 and nano zinc oxide, wherein the content of UV-326 is 40%, the content of UV-622 is 30%, the content of nano zinc oxide is 30%, and the rest of the raw materials and the preparation method are the same as embodiment 11, and are not described herein.

Example 13

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-531 and UV-944, wherein the content of UV-531 is 60%, the content of UV-944 is 40%, and the other raw materials and the preparation method are the same as those of embodiment 1, and are not described herein.

Example 14

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 13, and is different from embodiment 13 in that the light stabilizer consists of UV-531, UV-944 and nano zinc oxide, wherein the content of UV-531 is 40%, the content of UV-944 is 40%, the content of nano zinc oxide is 20%, and the rest of the raw materials and the preparation method are the same as embodiment 13, and are not described herein.

Example 15

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-1164 and UV-2020, wherein the content of UV-1164 is 50%, the dosage of UV-2020 is 50%, and the other raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 16

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 15, and is different from embodiment 15 in that the light stabilizer consists of UV-1164, UV-2020 and nano zinc oxide, wherein the content of UV-1164 is 40%, the content of UV-2020 is 40%, the content of nano zinc oxide is 20%, and the rest of raw materials and the preparation method are the same as embodiment 15, and are not described herein.

Example 17

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 15, and is different from embodiment 15 in that the light stabilizer consists of UV-1164, UV-2020 and nano zinc oxide, wherein the content of UV-1164 is 50%, the content of UV-2020 is 30%, the content of nano zinc oxide is 20%, and the rest of raw materials and the preparation method are the same as those of embodiment 1, and are not described herein.

Example 18

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 15, and is different from embodiment 15 in that the light stabilizer consists of UV-1164, UV-2020 and nano zinc oxide, wherein the content of UV-1164 is 50%, the content of UV-2020 is 40%, the content of nano zinc oxide is 10%, and the rest of raw materials and the preparation method are the same as embodiment 15, and are not described herein.

Example 19

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 15, and is different from embodiment 15 in that the light stabilizer consists of UV-1164, UV-2020 and nano zinc oxide, wherein the content of UV-1164 is 80%, the content of UV-2020 is 10%, the content of nano zinc oxide is 10%, and the rest of raw materials and the preparation method are the same as embodiment 15, and are not described herein.

Example 20

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 15, and is different from embodiment 15 in that the light stabilizer consists of UV-1164, UV-2020 and nano zinc oxide, wherein the content of UV-1164 is 10%, the content of UV-2020 is 60%, the content of nano zinc oxide is 30%, and the rest of raw materials and the preparation method are the same as embodiment 15, and are not described herein.

Example 21

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 15, and is different from embodiment 15 in that the light stabilizer consists of UV-1164, UV-2020 and nano titanium dioxide, wherein the content of UV-1164 is 40%, the dosage of UV-2020 is 40%, the content of nano titanium dioxide is 20%, and the rest of raw materials and the preparation method are the same as embodiment 15, and are not repeated herein.

Example 22

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-2908 and UV-3853, wherein the content of UV-2908 is 50%, the content of UV-3853 is 50%, and the other raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 23

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 22, and is different from embodiment 22 in that the light stabilizer consists of UV-2908, UV-3853 and nano zinc oxide, wherein the content of UV-2908 is 40%, the content of UV-3853 is 30%, the content of nano zinc oxide is 30%, and the rest of the raw materials and the preparation method are the same as embodiment 22, and are not repeated herein.

Example 24

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 22, and is different from embodiment 22 in that the light stabilizer consists of UV-2908, UV-3853 and nano zinc oxide, wherein the content of UV-2908 is 40%, the content of UV-3853 is 40%, the content of nano zinc oxide is 20%, and the rest of the raw materials and the preparation method are the same as embodiment 22, and are not repeated herein.

Example 25

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 22, and is different from embodiment 22 in that the light stabilizer consists of UV-2908, UV-3853 and nano zinc oxide, wherein the content of UV-2908 is 50%, the content of UV-3853 is 40%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 22, and are not repeated herein.

Example 26

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 22, and is different from embodiment 22 in that the light stabilizer consists of UV-2908, UV-3853 and nano zinc oxide, wherein the content of UV-2908 is 10%, the content of UV-3853 is 60%, the content of nano zinc oxide is 30%, and the rest of the raw materials and the preparation method are the same as embodiment 22, and are not repeated herein.

Example 27

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 22, and is different from embodiment 22 in that the light stabilizer consists of UV-2908, UV-3853 and nano zinc oxide, wherein the content of UV-2908 is 80%, the content of UV-3853 is 10%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 22, and are not repeated herein.

Example 28

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 22, and is different from embodiment 22 in that the light stabilizer consists of UV-2908, UV-3853 and nano titanium dioxide, wherein the content of UV-2908 is 40%, the content of UV-3853 is 30%, the content of nano titanium dioxide is 30%, and the rest of the raw materials and the preparation method are the same as embodiment 22, and are not described herein.

Example 29

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV2908 and UV-2020, wherein the content of UV-2908 is 55%, the dosage of UV-2020 is 45%, and the other raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 30

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 29, and is different from embodiment 29 in that the light stabilizer consists of UV-2908, UV-2020 and nano zinc oxide, wherein the content of UV-2908 is 50%, the content of UV-2020 is 40%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 29, and are not described herein.

Example 31

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 29, and is different from embodiment 29 in that the light stabilizer consists of UV-2908, UV-2020 and nano zinc oxide, wherein the content of UV-2908 is 40%, the content of UV-2020 is 30%, the content of nano zinc oxide is 30%, and the rest of the raw materials and the preparation method are the same as embodiment 29, and are not described herein.

Example 32

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 29, and is different from embodiment 29 in that the light stabilizer consists of UV-2908, UV-2020 and nano zinc oxide, wherein the content of UV-2908 is 40%, the content of UV-2020 is 40%, the content of nano zinc oxide is 20%, and the rest of the raw materials and the preparation method are the same as embodiment 29, and are not described herein.

Example 33

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 29, and is different from embodiment 29 in that the light stabilizer consists of UV-2908, UV-2020 and nano zinc oxide, wherein the content of UV-2908 is 10%, the content of UV-2020 is 60%, the content of nano zinc oxide is 30%, and the rest of the raw materials and the preparation method are the same as embodiment 29, and are not described herein.

Example 34

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 29, and is different from embodiment 29 in that the light stabilizer consists of UV-2908, UV-2020 and nano zinc oxide, wherein the content of UV-2908 is 80%, the content of UV-2020 is 10%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 29, and are not described herein.

Example 35

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 29, and is different from embodiment 29 in that the light stabilizer consists of UV-2908, UV-2020 and nano titanium dioxide, wherein the content of UV-2908 is 40%, the content of UV-2020 is 40%, the content of nano titanium dioxide is 20%, and the rest of raw materials and the preparation method are the same as embodiment 29, and are not described herein.

Example 36

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-1164 and UV-3853, wherein the content of UV-1164 is 50%, the content of UV-3853 is 50%, and the rest of raw materials and the preparation method are embodiment 1, which are not described herein.

Example 37

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 36, and is different from embodiment 36 in that the light stabilizer consists of UV-1164, UV-3853 and nano zinc oxide, wherein the content of UV-1164 is 40%, the content of UV-3853 is 40%, the content of nano zinc oxide is 20%, and the rest of the raw materials and the preparation method are the same as embodiment 36, and are not described herein.

Example 38

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 36, and is different from embodiment 36 in that the light stabilizer consists of UV-1164, UV-3853 and nano zinc oxide, wherein the content of UV-1164 is 50%, the content of UV-3853 is 40%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 36, and are not described herein.

Example 39

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 36, and is different from embodiment 36 in that the light stabilizer consists of UV-1164, UV-3853 and nano zinc oxide, wherein the content of UV-1164 is 40%, the content of UV-3853 is 30%, the content of nano zinc oxide is 30%, and the rest of the raw materials and the preparation method are the same as embodiment 36, and are not described herein.

Example 40

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 36, and is different from embodiment 36 in that the light stabilizer consists of UV-1164, UV-3853 and nano zinc oxide, wherein the content of UV-1164 is 10%, the content of UV-3853 is 60%, the content of nano zinc oxide is 30%, and the rest of the raw materials and the preparation method are the same as embodiment 36, and are not described herein.

Example 41

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 36, and is different from embodiment 36 in that the light stabilizer consists of UV-1164, UV-3853 and nano zinc oxide, wherein the content of UV-1164 is 80%, the content of UV-3853 is 10%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as embodiment 36, and are not described herein.

Example 42

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 36, and is different from embodiment 36 in that the light stabilizer consists of UV-1164, UV-3853 and nano titanium dioxide, wherein the content of UV-1164 is 40%, the content of UV-3853 is 40%, the content of nano titanium dioxide is 20%, and the rest of the raw materials and the preparation method are the same as embodiment 36, and are not described herein.

Example 43

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-329, UV-2020 and nano zinc oxide, wherein the content of UV-329 is 40%, the content of UV-2020 is 40%, the content of nano zinc oxide is 20%, and the rest of raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 44

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-2908, UV-944 and nano zinc oxide, wherein the content of UV-2908 is 40%, the content of UV-944 is 40%, the content of nano zinc oxide is 20%, and the rest of the raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 45

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-326, UV-3853 and nano zinc oxide, wherein the content of UV-326 is 40%, the content of UV-3853 is 40%, the content of nano zinc oxide is 20%, and the rest of raw materials and the preparation method are the same as embodiment 1, and are not repeated herein.

Example 46

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that the light stabilizer consists of UV-P, UV-2020 and nano zinc oxide, wherein the content of UV-P is 40%, the content of UV-2020 is 40%, the content of nano zinc oxide is 20%, and the rest of the raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 47

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that polypropylene is used to replace polyethylene, and the light stabilizer is composed of UV-1164, UV-2020 and nano zinc oxide, wherein the content of UV-1164 is 40%, the content of UV-2020 is 40%, the content of nano zinc oxide is 20%, and the rest of the raw materials and the preparation method are the same as embodiment 1, and are not described herein.

Example 48

The present embodiment provides a color chip, which has the same structural shape as embodiment 47, and is different from embodiment 47 in that EVA is used to replace polyethylene, the EVA and EVA in embodiment 3 are in the same batch, and the rest of raw materials and preparation method are the same as embodiment 47, and are not described herein.

Example 49

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 47, and is different from embodiment 47 in that ASA is used to replace polyethylene, and ASA in embodiment 7 are in the same batch, and the rest of raw materials and preparation methods are the same as those of embodiment 47, and are not described herein.

Example 50

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 47, and is different from embodiment 47 in that ASA-PVC is used to replace polyethylene, and the rest of the raw materials and the preparation method are the same as that of embodiment 47, and are not described herein.

Example 51

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that polypropylene is used to replace polyethylene, and the light stabilizer is composed of UV-1164, UV-3853 and nano zinc oxide, wherein the content of UV-1164 is 40%, the content of UV-3853 is 40%, the content of nano zinc oxide is 20%, the polypropylene and the polypropylene in embodiment 45 are the same batch, and the rest raw materials and the preparation method are the same as those of embodiment 1, and are not described herein.

Example 52

The present embodiment provides a color chip, which has the same structural shape as embodiment 51, and is different from embodiment 51 in that EVA is used to replace polyethylene, the EVA and EVA in embodiment 3 are in the same batch, and the rest of raw materials and preparation method are the same as embodiment 51, and are not described herein.

Example 53

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 51, and is different from embodiment 51 in that ASA is used to replace polyethylene, and ASA in embodiment 7 are in the same batch, and the rest of raw materials and preparation methods are the same as those of embodiment 51, and are not described herein.

Example 54

The present embodiment provides a color chip, which has the same structural shape as embodiment 51, and is different from embodiment 1 in that ASA-PVC is used to replace polyethylene, the same batch as ASA-PVC in embodiment 51, and the rest of raw materials and preparation methods are the same as embodiment 51, and are not described herein.

Example 55

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that polypropylene is used to replace polyethylene, and the light stabilizer is composed of UV-2908, UV-3853 and nano zinc oxide, wherein the content of UV-2908 is 40%, the content of UV-3853 is 40%, the content of nano zinc oxide is 20%, the polypropylene and the polypropylene in embodiment 45 are the same batch, and the rest raw materials and the preparation method are the same as those of embodiment 1, and are not repeated herein.

Example 56

The present embodiment provides a color chip, which has the same structural shape as embodiment 55, and is different from embodiment 55 in that EVA is used to replace polyethylene, the EVA and EVA in embodiment 3 are in the same batch, and the rest of raw materials and preparation method are the same as embodiment 55, and are not described herein.

Example 57

The present embodiment provides a color chip, which has the same structural shape as embodiment 55, and is different from embodiment 55 in that ASA is used to replace polyethylene, and ASA in embodiment 7 are in the same batch, and the rest of raw materials and preparation methods are the same as embodiment 55, and are not described herein.

Example 58

The present embodiment provides a color chip, which has the same structural shape as embodiment 55, and is different from embodiment 55 in that ASA-PVC is used to replace polyethylene, which is the same batch as ASA-PVC in embodiment 48, and the rest of the raw materials and the preparation method are the same as embodiment 55, and are not described herein.

Example 59

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 1, and is different from embodiment 1 in that polypropylene is used to replace polyethylene, and the light stabilizer is composed of UV-2908, UV-2020 and nano zinc oxide, wherein the content of UV-2908 is 40%, the content of UV-2020 is 40%, the content of nano zinc oxide is 20%, the polypropylene and the polypropylene in embodiment 45 are the same batch, and the rest raw materials and the preparation method are the same as those of embodiment 1, and are not repeated herein.

Example 60

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 59, and is different from embodiment 59 in that EVA is used to replace polyethylene, the EVA and EVA in embodiment 3 are in the same batch, and the rest of raw materials and preparation methods are the same as that of embodiment 59, and are not described herein.

Example 61

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 59, and is different from embodiment 59 in that ASA is used to replace polyethylene, and ASA in embodiment 7 are in the same batch, and the rest of raw materials and preparation methods are the same as that of embodiment 59, and are not described herein.

Example 62

The present embodiment provides a color chip, which has the same structural shape as that of embodiment 59, and is different from embodiment 59 in that ASA-PVC is used to replace polyethylene, which is the same batch as ASA-PVC in embodiment 48, and the rest of the raw materials and the preparation method are the same as embodiment 59, and are not described herein.

Comparative example 1

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer is UV-1164, and the rest of the raw materials and the preparation method are the same as those of example 1, and are not described herein.

Comparative example 2

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer is UV-2908, and the rest of the raw materials and the preparation method are the same as those of example 1, and are not repeated here.

Comparative example 3

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer is UV-3853, and the rest of the raw materials and the preparation method are the same as those of example 1, and are not repeated here.

Comparative example 4

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer is UV-2020, and the rest of the raw materials and the preparation method are the same as those of example 1, and are not described in detail herein.

Comparative example 5

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-1164 and nano zinc oxide, the content of UV-1164 is 70%, the content of nano zinc oxide is 30%, and the rest of raw materials and preparation methods are the same as those of example 1, and are not repeated here.

Comparative example 6

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-2908 and nano zinc oxide, the content of UV-2908 is 70%, the content of nano zinc oxide is 30%, and the rest of raw materials and preparation methods are the same as those of example 1, and are not repeated here.

Comparative example 7

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-3853 and nano zinc oxide, the content of UV-3853 is 70%, the content of nano zinc oxide is 30%, and the rest of raw materials and preparation methods are the same as those of example 1, and are not repeated here.

Comparative example 8

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-2020 and nano zinc oxide, wherein the content of UV-2020 is 70%, the content of nano zinc oxide is 30%, and the rest of raw materials and preparation methods are the same as those of example 1, and are not repeated here.

Comparative example 9

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-1164, UV-2020 and nano zinc oxide, wherein the content of UV-1164 is 5%, the content of UV-2020 is 70%, the content of nano zinc oxide is 25%, and the rest of the raw materials and the preparation method are the same as those of example 1, and are not repeated herein.

Comparative example 10

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-1164, UV-2020 and nano zinc oxide, the content of UV-1164 is 90%, the content of UV-2020 is 5%, the content of nano zinc oxide is 5%, and the rest of the raw materials and the preparation method are the same as example 1, and are not repeated herein.

Comparative example 11

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-1164, UV-3853 and nano zinc oxide, the content of UV-1164 is 5%, the content of UV-3853 is 80%, the content of nano zinc oxide is 15%, and the rest of raw materials and preparation methods are the same as example 1, and are not repeated herein.

Comparative example 12

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-1164, UV-3853 and nano zinc oxide, the content of UV-1164 is 85%, the content of UV-2020 is 5%, the content of nano zinc oxide is 10%, and the rest of the raw materials and the preparation method are the same as example 1, and are not repeated herein.

Comparative example 13

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-2908, UV-2020 and nano zinc oxide, wherein the content of UV-2908 is 5%, the content of UV-2020 is 85%, the content of nano zinc oxide is 10%, and the rest of raw materials and preparation methods are the same as example 1, and are not repeated herein.

Comparative example 14

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-2908, UV-2020 and nano zinc oxide, the content of UV-2908 is 80%, the content of UV-2020 is 5%, the content of nano zinc oxide is 15%, and the rest of raw materials and preparation methods are the same as example 1, and are not repeated here.

Comparative example 15

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-2908, UV-3853 and nano zinc oxide, the content of UV-2908 is 10%, the content of UV-2020 is 85%, the content of nano zinc oxide is 5%, and the rest of raw materials and preparation methods are the same as example 1, and are not repeated here.

Comparative example 16

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-2908, UV-3853 and nano zinc oxide, the content of UV-2908 is 70%, the content of UV-3853 is 5%, the content of nano zinc oxide is 25%, and the rest of raw materials and preparation methods are the same as example 1, and are not repeated herein.

Comparative example 17

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-327, UV-622 and nano zinc oxide, wherein the content of UV-327 is 40%, the content of UV-622 is 40%, the content of nano zinc oxide is 20%, and the rest of raw materials and preparation methods are the same as those of example 1, and are not repeated herein.

Comparative example 18

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-328, UV-622 and nano zinc oxide, wherein the content of UV-328 is 40%, the content of UV-622 is 40%, the content of nano zinc oxide is 20%, and the rest of raw materials and preparation methods are the same as those of example 1, and are not repeated herein.

Comparative example 19

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-531, UV-622 and nano zinc oxide, wherein the content of UV-531 is 40%, the content of UV-622 is 40%, the content of nano zinc oxide is 20%, and the rest of raw materials and preparation methods are the same as those of example 1, and are not repeated herein.

Comparative example 20

The comparative example provides a color chip, which has the same structure and shape as those of example 1, and is different from example 1 in that the light stabilizer consists of UV-326, UV-770 and nano zinc oxide, wherein the content of UV-326 is 40%, the content of UV-770 is 40%, the content of nano zinc oxide is 20%, and the rest of raw materials and preparation methods are the same as those of example 1, and are not repeated herein.

Test examples

The color chips provided in examples and comparative examples were subjected to an aging resistance test under the following specific conditions: accelerated photo-aging is carried out by adopting a xenon lamp, and irradiance broadband is (300-400 nm) 60+/-2 w/m ² The blackboard temperature is 63+/-3 ℃, the test box temperature is 38+/-3 ℃ and the relative humidity is 50+/-10%; spraying for 18 min, and irradiance broadband of (300-400 nm) 60+ -2 w/m ² The color differences were measured for weather resistance of 1000h, 2000h, 3000h, 4000h, 5000h and 6000h, respectively, and the results are shown in Table 1 below.

TABLE 1 color chip different weather-resistant time color difference data table

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From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

the ultraviolet absorber and the hindered amine light stabilizer of specific types are selected to be compounded and added into the plastic-wood composite material, so that the ultraviolet absorber and the hindered amine light stabilizer can be matched with a plastic base material in a synergistic manner, the weather resistance of the plastic-wood composite material is obviously improved, and the service life of the plastic-wood composite material is prolonged while the attractive appearance of the plastic-wood composite material is maintained.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite light stabilizer, characterized in that it comprises, in mass percent: 10-30% of light shielding agent, 40-50% of ultraviolet absorber and 30-40% of hindered amine light stabilizer;

wherein the ultraviolet absorber is selected from 2- (4, 6-bis (2, 4-dimethylphenyl) -1,3, 5-triazin-2-yl) -5-octyloxyphenol and/or 3, 5-bis (1, 1-dimethylethyl) -4-hydroxybenzoate; the hindered amine light stabilizer is selected from the group consisting of N, polymers of the reaction product of N' -bis (2, 6-tetramethyl-4-piperidinyl) -1, 6-hexanediamine with 2,4, 6-trichloro-1, 3, 5-triazine and N-butyl-1-butylamine and N-butyl-2, 6-tetramethyl-4-piperidinamine and/or 2, 6-tetramethyl-4-piperidinyl ester.

2. The composite light stabilizer according to claim 1, wherein the light shielding agent comprises nano-sized zinc oxide and/or nano-sized titanium dioxide.

3. A plastic-wood composite composition comprising a plastic base, a biomass material and a light stabilizer, wherein the light stabilizer is the composite light stabilizer of claim 1 or 2.

4. A plastic-wood composite composition according to claim 3, characterized in that the mass ratio of the plastic base material to the light stabilizer is 100 (0.05-1.2).

5. A plastic-wood composite composition according to claim 3, characterized in that the mass ratio of the plastic base material to the light stabilizer is 100: (0.1-1).

6. A plastic-wood composite composition according to claim 3, characterized in that the mass ratio of the plastic base material to the biomass material is 100: (5-20).

7. A plastic-wood composite composition according to claim 3, characterized in that the mass ratio of the plastic base material to the biomass material is 100: (8-12).

8. A plastic-wood composite composition according to claim 3, wherein the plastic base comprises at least one of PE, PP, ASA, EVA or ASA-PVC copolymer.

9. A plastic-wood composite composition according to claim 3, wherein the biomass material comprises at least one of wood flour, bamboo chips, wheat straw, chaff, peanut shells, or cotton straw.

10. The plastic-wood composite composition according to any one of claims 3 to 9, further comprising an auxiliary agent comprising at least one of a lubricant, an antioxidant or a pigment.

11. A plastic-wood product characterized in that at least the exposed surface of said plastic-wood product comprises the composite light stabilizer of claim 1 or 2.

12. The plastic-wood product according to claim 11, wherein the plastic-wood product is a co-extruded wood product comprising a skin layer prepared from the plastic-wood composite composition according to any one of claims 3 to 10.