CN112961405A - High-weather-resistance light stabilizer and composite light stabilizer for polyolefin wood-plastic composite material - Google Patents
High-weather-resistance light stabilizer and composite light stabilizer for polyolefin wood-plastic composite material Download PDFInfo
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Abstract
The present invention discloses a high-weatherability light stabilizer and a composite light stabilizer for polyolefin wood-plastic composites, the light stabilizer including 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N ' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl), further including 2-hydroxy-4-octoxybenzophenone, 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methyl) -5-chloro-benzotriazole, 2 ' -hydroxy-4-piperidyl, and a composite light stabilizer, Bis 2,2,6, 6-tetramethylpiperidinol sebacate, poly- { [6- [ (1,1,3, 3-tetramethylbutyl) -amino ]1,3,5, -triazine-2, 4-diyl ] [ (2,2,6, 6-tetramethylpiperidyl) -imino ] -1, 6-hexanediyl- [ (2,2,6, 6-tetramethylpiperidyl) -imino ] }. The invention is added into the polyolefin wood-plastic composite material to improve the light stability of the polyolefin wood-plastic composite material and greatly improve the weather resistance of the polyolefin wood-plastic composite material.
Description
Technical Field
The invention relates to the field of application of organic light stabilizers in polymers, and particularly relates to a light stabilizer for a polyolefin wood-plastic composite material to improve the weather resistance of the polyolefin wood-plastic composite material.
Background
In order to improve the light stability of the polyolefin wood-plastic composite material, an ultraviolet absorbent and an antioxidant are usually added, but due to insufficient heat resistance, the ultraviolet absorbent and the antioxidant lose effective amounts in the processing process. While the general hindered amine light stabilizers can only exert the efficacy of light stabilizers. The free radicals generated by the irradiation and cracking of the plastic are captured to reduce the color change of the plastic caused by the irradiation. The ultraviolet absorbent can only absorb ultraviolet rays, and can not capture free radicals generated by irradiation and cracking of plastics, thereby reducing color change of the plastics caused by irradiation.
The Chinese patent CN201610485197.1 is to add attapulgite and graphene to prepare a weather-resistant enhanced wood-plastic product. Chinese patent CN201721337918.0 is an oxidation-resistant long-life wood-plastic composite board, wherein an oxidation-resistant layer and a waterproof layer are arranged on the surface of the board, and sealing plates are arranged around the board. Chinese patent CN201610114497.9 is a novel PE wood-plastic section, which is made of PE reclaimed materials, wood powder, mica powder, composite lubricant, compatilizer, iron oxide red and antioxidant. Chinese patent CN201711238217.6 discloses a production process of a light-aging-resistant wood-plastic composite material, which comprises the steps of preparing wood carboxymethyl cellulose, siloxane modified thermoplastic resin and an ultraviolet absorbent, and then dividing the wood carboxymethyl cellulose, the siloxane modified thermoplastic resin and the ultraviolet absorbent into wood-plastic composite materials. However, outdoor wood-plastic composites require higher weatherability.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a light stabilizer with high weather resistance, which is characterized by comprising 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) and CAS number 86168-95-8, and is used for improving the weather resistance of polyolefin wood-plastic composite materials.
In another aspect of the invention, a composite light stabilizer for polyolefin wood-plastic composite materials is provided, which comprises the light stabilizer and an ultraviolet absorber and/or an antioxidant, and is used for improving the weather resistance of the polyolefin wood-plastic composite materials.
Further, the mass ratio of the light stabilizer to the ultraviolet absorber and/or the antioxidant is 10-100: 90-0.
Further, the preferable mass ratio of the light stabilizer to the ultraviolet absorber and/or the antioxidant is 100-40: 0-60.
Further, the ultraviolet absorber includes 2-hydroxy-4-n-octyloxybenzophenone (CAS number 1843-05-6), 2- (2 '-hydroxy-3' -tert-butyl-5 '-methylphenyl) -5-chlorobenzotriazole (CAS number 3896-11-5), 2- (2-hydro-benzotriazol-2-yl) -4, 6-di-tert-amylphenol (CAS number 25973-55-1), 2- (2' -hydroxy-5-methylphenyl) benzotriazole (CAS No.2440-22-4), 2-benzotriazol-2-yl-4, 6-di-tert-butylphenol (CAS No.3846-71-7), 2- (2-hydro-benzotriazole-2-hydroxy) -4- (tert-butyl-6-sec-butyl) phenol (CAS No.36437-37-3), 2- (2 ' -hydroxy-5 ' -tert-octylphenyl) benzotriazole (CAS No.3147-75-9), 2- (2-hydro-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol (CAS No.70321-86-7), 2-2 ' -methylenebis (6- (2-hydro-benzotriazole-2-yl) -4- (1,1,3, 3-tetramethylbutyl)) phenol (CAS No. 103597-45-1), 2- (2-hydro-benzotriazole-2-yl) -6-dodecyl -4-methylphenol (CAS number 23328-53-2) and 2- (2 '-hydroxy-3' -cumyl-5 '-tert-octylphenyl) benzotriazole (CAS number 73936-91-1), etc., but other types of UV absorbers may be used, such as N- (2-ethoxyphenyl) -N' - (2-ethylphenyl) oxalyldiamide, 2- (4, 6-diphenyl-1, 3, 5-triazine-2-hydroxy) -5-hexyloxyphenol, 2- [4, 6-bis (2, 4-xylyl) -2- (1,3, 5-triazinyl) ] 5-octyloxyphenol or poly- [ [6- (1,1,3, 3-tetramethylbutyl) -imino ] -1,3, 5-triazine-2, 4-diyl ] - [2- (2,2,6, 6-tetramethylpiperidinyl) -amino ] -hexylene- [4- (2,2,6, 6-tetramethylpiperidinyl) ] -imino (CAS No. 71878-19-8).
Further, the ultraviolet absorber is preferably 2-hydroxy-4-octyloxybenzophenone or 2 ' - (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methyl) -5-chloro-benzotriazole, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-amyl) -benzotriazole or 2- (2 ' -hydroxy-5 ' -tert-octyl) -benzotriazole.
Further, the antioxidant includes a phosphorus antioxidant or a phenol antioxidant.
Furthermore, the paint also comprises a compatilizer and an inorganic filler.
The composite light stabilizer for the polyolefin wood-plastic composite material is added in an amount of 0.01-3.0% of the polyolefin.
Advantageous effects of the invention
The invention provides a 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) light stabilizer, which greatly improves the weather resistance of a polyolefin wood-plastic composite material compared with the existing light stabilizer, and can be compounded with an ultraviolet absorbent and/or an antioxidant to further improve the weather resistance of the polyolefin wood-plastic composite material.
Drawings
FIG. 1 is a chemical structural diagram of 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) in the invention.
Detailed Description
The invention will be further described with reference to examples of embodiments, the construction and principles of such devices being apparent to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the prior art, in order to improve weather resistance, polyolefin wood-plastic materials are generally added with ultraviolet absorbers, and the light stabilizer provided by the invention is mainly prepared from 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) monomer or mixed ultraviolet absorbers, wherein 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) has a melting point as high as 320 ℃, so that the polyolefin has better weather resistance effect.
The invention takes 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) as a main component, and one or two of an ultraviolet absorbent and an antioxidant are singly or mixed to form the composition, and the composition is added into the polyolefin wood-plastic composite material to improve the weather resistance of the polyolefin wood-plastic composite material; the light stabilizer comprises the following components in percentage by weight: the ratio of 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) to the sum of the masses of UV absorbers and/or antioxidants is: 10-100: 90-0; the addition amount is as follows: 0.01 to 3.0 percent of the weight of the polyolefin.
Example 1
Feeding polyethylene into an exhaust type double-screw extruder, melting, mixing and extruding for granulation under the condition that the temperature of a charging barrel is 220 ℃, uniformly mixing with 20 parts by weight of wood powder in a mixer, preparing a standard test piece by an injection molding machine, measuring the standard test piece by using a QUV weather resistance tester, wherein the circulation period of a lamp tube UVA-340 is 4 hours UV/4 hours for condensation, the temperature of a blackboard is 50 ℃, the weather resistance is 100 hours, 200 hours, 300 hours, 400 hours and 500 hours respectively, and then measuring the color difference before and after the weather resistance respectively. The results are shown in Table 1.
Example 2
Mixing 80 parts by weight of polyethylene and 0.17 part by weight of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methyl) -5-chloro-benzotriazole and 0.17 part by weight of 2-hydroxy-4-octyloxybenzophenone uniformly in a mixer, feeding the mixture into an exhaust type double screw extruder, melting, mixing, extruding and granulating the mixture into a color master under the condition that the temperature of a cylinder is 220 ℃, uniformly mixing the color master with 20 parts by weight of wood powder in the mixer, preparing a standard test piece by an injection molding machine, measuring the standard test piece by a QUV weather resistance tester, condensing the lamp tube UVA-340 with the circulation period of 4 hours UV/4 hours, and measuring the color difference before and after the weather resistance respectively after the blackboard temperature is 50 ℃, and weather resistance is 100 hours, 200 hours, 300 hours, 400 hours and 500 hours. The results are shown in Table 1.
Example 3
80 parts by weight of polyethylene were mixed homogeneously with 0.17 part by weight of 2- (2 '-hydroxy-3' -tert-butyl-5 '-methyl) -5-chloro-benzotriazole, 0.17 part by weight of 2-hydroxy-4-octyloxybenzophenone, 0.17 part by weight of poly- { [6- [ (1,1,3,3, -tetramethylbutyl) -amino ]1,3, 5-triazine-2, 4-diyl ] [ (2,2,6, 6-tetramethylpiperidinyl) -imino ] -1, 6-hexanediyl- [ (2,2,6, 6-tetramethylpiperidinyl) -imino ] }, 0.17 part by weight of poly [1- (2' -hydroxyethyl) -2,2,6, 6-tetramethyl-4-hydroxypiperidine succinate ] in a mixer and then fed into a vented bis-hydroxypiperidine succinate mixer The method comprises the steps of extruding and granulating the mixture into a color master through a screw rod extruder and melting and mixing the color master under the condition that the temperature of a charging barrel is 220 ℃, then uniformly mixing the color master with 20 parts by weight of wood powder in a mixer, preparing a standard test piece through an injection molding machine, measuring the standard test piece by using a QUV weather resistance tester, wherein the circulation period of a lamp tube UVA-340 is 4 hours UV/4 hours for condensation, the temperature of a blackboard is 50 ℃, the weather resistance is respectively 100 hours, 200 hours, 300 hours, 400 hours and 500 hours, and then, the color difference before and after the weather resistance. The results are shown in Table 1.
Example 4
80 parts by weight of polyethylene and 0.37 part by weight of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methyl) -5-chloro-benzotriazole, 0.34 part by weight of 2-hydroxy-4-octyloxybenzophenone, 0.17 part by weight of poly- { [6- [ (1,1,3,3, -tetramethylbutyl) -amino ]1,3,5, -triazine-2, 4-diyl ] [ (2,2,6, 6-tetramethylpiperidyl) -imino ] -1, 6-hexanediyl- [ (2,2,6, 6-tetramethylpiperidyl) -imino ] } were mixed uniformly in a mixer and then fed into an exhaust type twin screw extruder, and melt-kneaded at a cylinder temperature of 220 ℃ to be extruded and pelletized into a color master, and then uniformly mixing with 20 parts by weight of wood powder in a mixer, preparing into a standard test piece by an injection molding machine, measuring the condensation time of the standard test piece by a QUV weather resistance tester with a lamp tube UVA-340 cycle period of 4 hours UV/4 hours, a blackboard temperature of 50 ℃, weather resistance times of 100 hours, 200 hours, 300 hours, 400 hours and 500 hours respectively, and then measuring the color difference before and after weather resistance. The results are shown in Table 1.
Example 5
80 parts by weight of polyethylene and 0.37 part by weight of 2- (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methyl) -5-chloro-benzotriazole, 0.34 part by weight of 2-hydroxy-4-octyloxybenzophenone, 0.27 part by weight of poly- { [6- [ (1,1,3,3, -tetramethylbutyl) -amino ]1,3,5, -triazine-2, 4-diyl ] [ (2,2,6, 6-tetramethylpiperidyl) -imino ] -1, 6-hexanediyl- [ (2,2,6, 6-tetramethylpiperidyl) -imino ] } were mixed uniformly in a mixer and then fed into an exhaust type twin screw extruder, and melt-kneaded at a cylinder temperature of 220 ℃ to be extruded and pelletized into a color master, and then uniformly mixing with 20 parts by weight of wood powder in a mixer, preparing into a standard test piece by an injection molding machine, measuring the condensation time of the standard test piece by a QUV weather resistance tester with a lamp tube UVA-340 cycle period of 4 hours UV/4 hours, a blackboard temperature of 50 ℃, weather resistance times of 100 hours, 200 hours, 300 hours, 400 hours and 500 hours respectively, and then measuring the color difference before and after weather resistance. The results are shown in Table 1.
Example 6
80 parts by weight of polyethylene were mixed homogeneously in a mixer with 0.37 part by weight of 2- (2 '-hydroxy-3' -tert-butyl-5 '-methyl) -5-chloro-benzotriazole, 0.34 part by weight of 2-hydroxy-4-octyloxybenzophenone, 0.17 part by weight of 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) and then fed into an vented twin-screw extruder, the color master is prepared by melting, mixing, extruding and granulating under the condition that the temperature of a charging barrel is 220 ℃ to form a color master, then uniformly mixing the color master with 20 parts by weight of wood powder in a mixer, preparing a standard test piece by an injection molding machine, measuring the temperature of a blackboard by using a QUV weather resistance tester, condensing the test piece by using a lamp tube UVA-340 with the cycle period of 4 hours UV/4 hours, respectively resisting weather for 100 hours, 200 hours, 300 hours, 400 hours and 500 hours at the temperature of 50 ℃ and then respectively measuring the color difference before and after the weather resistance. The results are shown in Table 1.
Example 7
80 parts by weight of polyethylene were mixed homogeneously with 0.37 part by weight of 2- (2 '-hydroxy-3' -tert-butyl-5 '-methyl) -5-chloro-benzotriazole, 0.34 part by weight of 2-hydroxy-4-octyloxybenzophenone, 0.34 part by weight of 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) in a mixer and then fed to a vented twin-screw extruder, the color master is prepared by melting, mixing, extruding and granulating under the condition that the temperature of a charging barrel is 220 ℃ to form a color master, then uniformly mixing the color master with 20 parts by weight of wood powder in a mixer, preparing a standard test piece by an injection molding machine, measuring the temperature of a blackboard by using a QUV weather resistance tester, condensing the test piece by using a lamp tube UVA-340 with the cycle period of 4 hours UV/4 hours, respectively resisting weather for 100 hours, 200 hours, 300 hours, 400 hours and 500 hours at the temperature of 50 ℃ and then respectively measuring the color difference before and after the weather resistance. The results are shown in Table 1.
The polyolefin used in the present invention is mainly UNITHENE LH614 manufactured by taiwan polymer chemicals, ultraviolet absorbers and light stabilizers are all manufactured by taiwan double bond chemical company, light stabilizers 2,9,11,13,15,22,24,26,27, 28-decatranyl (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) (No. 86168-95-8) and antioxidants are manufactured by taiwan double bond chemical company, the rest inorganic fillers are commercially available, the extruder model is SHJ-20, manufactured by Nanjing Jennt, an injection molding machine model Y-450-1S-p manufactured by Taiwan Dada, and a weather resistance tester (QUV) model QUV accepted weather tester manufactured by Q-PANEL.
TABLE 1 test data of weather resistance of polyethylene wood-plastic composite test piece
Referring to Table 1, the light stabilizer having 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) component is remarkably superior in weather resistance to the light stabilizer in the remaining examples, while being small in color difference and more stable.
Among them, table 1 shows that the composite light stabilizer used in the polyethylene wood plastic composite material can improve the weather resistance of the polyethylene wood plastic composite material more than the one-component light stabilizer, by comparing example 1 and examples 6, 7,2, 9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) in a certain proportion range, the higher the addition amount is, the better the weather resistance of the polyethylene wood plastic composite material is, and the ultraviolet absorber (such as examples 3, 6-tetramethyl-4-piperidyl) is further added than example 1, 4. 5, 6, 7) can further improve the weather resistance of the polyethylene wood-plastic composite material. And the results obtained in the examples show that the weatherability of the polyethylene wood-plastic composite material containing 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N, N ' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl) is obviously better than that of other composite light stabilizers used in the existing industry, the weatherability of the polyolefin wood-plastic composite material is greatly improved, and the added ultraviolet absorbent is 2-hydroxy-4-octyloxybenzophenone or 2 ' - (2 ' -hydroxy-3 ' -tert-butyl-5 ' -methyl) -5-chloro-4-piperidyl) The weather resistance of (E) -benzotriazole, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-amyl) -benzotriazole or 2- (2 ' -hydroxy-5 ' -tert-octyl) -benzotriazole can be greatly improved by about 2 times.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be within the technical scope of the present invention, and the technical solutions and novel concepts according to the present invention should be covered by the scope of the present invention.
Claims (9)
1. A light stabilizer, characterized by comprising 2,9,11,13,15,22,24,26,27, 28-decaazatricyclo (21,3,1,110,14) octadecane-1 (27),10,12,14(28),23, 25-hexene-12, 25-diamine, N' -bis (1,1,3, 3-tetramethylbutyl) -2,9,15, 22-tetramethyl (2,2,6, 6-tetramethyl-4-piperidyl), CAS number 86168-95-8, for improving the weather resistance of polyolefin wood-plastic composites.
2. A composite light stabilizer for polyolefin wood-plastic composite material, which comprises the light stabilizer of claim 1, and is characterized by further comprising an ultraviolet absorber and/or an antioxidant for improving the weather resistance of the polyolefin wood-plastic composite material.
3. The composite light stabilizer for polyolefin wood-plastic composite material as claimed in claim 2, wherein the mass ratio of the light stabilizer to the ultraviolet absorber and/or the antioxidant is 10-100: 90-0.
4. The composite light stabilizer for polyolefin wood-plastic composite material as claimed in claim 3, wherein the preferable mass ratio of the light stabilizer to the ultraviolet absorber and/or the antioxidant is 100-40: 0-60.
5. The composite light stabilizer for polyolefin wood-plastic composites according to claim 4, wherein the ultraviolet absorber comprises 2-hydroxy-4-n-octoxybenzophenone (CAS number 1843-05-6), 2- (2 '-hydroxy-3' -tert-butyl-5 '-methylphenyl) -5-chlorobenzotriazole (CAS number 3896-11-5), 2- (2-hydro-benzotriazol-2-yl) -4, 6-di-tert-amylphenol (CAS number 25973-55-1), 2- (2' -hydroxy-5-methylphenyl) benzotriazole (CAS number 2440-22-4), 2-benzotriazol-2-yl-4, 6-di-tert-butylphenol (CAS number 3846-71-7), 2- (2-hydro-benzotriazole-2-hydroxy) -4- (tert-butyl-6-sec-butyl) phenol (CAS number 36437-37-3), 2- (2 ' -hydroxy-5 ' -tert-octylphenyl) benzotriazole (CAS No.3147-75-9), 2- (2-hydro-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol (CAS number 70321-86-7), 2-2 ' -methylenebis (6- (2-hydro-benzotriazole-2-yl) -4- (1,1,3, 3-tetramethylbutyl)) phenol (CAS number 103597-45-1) 2- (2-hydro-benzotriazol-2-yl) -6-dodecyl-4-methylphenol (CAS number 23328-53-2) and 2- (2 ' -hydroxy-3 ' -isopropylphenyl-5 ' -tert-octylphenyl) benzotriazole (CAS number 73936-91-1) and the like, but other types of ultraviolet absorbers such as N- (2-ethoxyphenyl) -N- (2-ethylphenyl) oxalyl diamine, 2- (4, 6-diphenyl-1, 3, 5-triazine-2-hydroxy) -5-hexyloxyphenol, 2- [4, 6-bis (2, 4-xylyl) -2- (1,3, 5-triazinyl) ] 5-octyloxyphenol or poly- [ [6- (1,1,3, 3-tetramethylbutyl) -imino ] -1,3, 5-triazine-2, 4-diyl ] - [2- (2,2,6, 6-tetramethylpiperidinyl) -amino ] -hexylene- [4- (2,2,6, 6-tetramethylpiperidinyl) ] -imino (CAS number 71878-19-8).
6. The composite light stabilizer for polyolefin wood-plastic composites according to claim 5, wherein the ultraviolet absorber is preferably 2-hydroxy-4-octoxybenzophenone or 2- (2 '-hydroxy-3' -tert-butyl-5 '-methyl) -5-chloro-benzotriazole, 2- (2' -hydroxy-3 ', 5' -di-tert-amyl) -benzotriazole or 2- (2 '-hydroxy-5' -tert-octyl) -benzotriazole.
7. The composite light stabilizer for polyolefin wood-plastic composite material according to claim 5, wherein the antioxidant comprises phosphorus antioxidant or phenol antioxidant.
8. The composite light stabilizer for polyolefin wood-plastic composite material according to claim 6, characterized in that it further comprises a compatibilizer and an inorganic filler.
9. The composite light stabilizer for the polyolefin wood-plastic composite material as claimed in any one of claims 2 to 7, wherein the addition amount of the composite light stabilizer is 0.01 to 3.0 percent of the mass of the polyolefin.
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