CN107057224B - A kind of high-weatherability energy PVC-U drainpipe and preparation method thereof - Google Patents
A kind of high-weatherability energy PVC-U drainpipe and preparation method thereof Download PDFInfo
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- CN107057224B CN107057224B CN201710309550.5A CN201710309550A CN107057224B CN 107057224 B CN107057224 B CN 107057224B CN 201710309550 A CN201710309550 A CN 201710309550A CN 107057224 B CN107057224 B CN 107057224B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention relates to a kind of high-weatherability energy PVC-U drainpipes and preparation method thereof, and the PVC-U drainpipe is grouped as by the group of following mass fraction: 100 parts of polyvinyl chloride resin；1~3 part of heat stabilizer；0.5~3 part of weather resisting agent；1~30 part of filler；1~5 part of impact modifier；0.1~5 part of lubricant；0.5~5 part of processing aid；Wherein, the weather resisting agent is to be coated obtained by light stabilizer and antioxidant using coupling agent on titanium dioxide surface；The mass ratio of the summation and titanium dioxide of the light stabilizer and antioxidant is 0.1~1:10, and the mass ratio of the light stabilizer and antioxidant is 0.5~2:1.PVC-U drainpipe provided by the invention is on the basis of keeping excellent mechanical properties and processing performance, by the way that novel weathering resistant agent is added, significantly improves the weather resistance of PVC-U drainpipe on the basis of holding PVC-U drainpipe original mechanical property.
Description
Technical field
The present invention relates to polychloroethylene pipes fields, and in particular, to a kind of high-weatherability energy PVC-U drainpipe and its system
Preparation Method.
Background technique
The plastic products that open air uses, if PVC-U drainpipe is due to being chronically exposed in natural environment, vulnerable to light, heat, machine
The factors such as tool stress lead to pipeline jaundice, cracking, mechanical properties decrease, therefore usually require to add in its formula anti-oxidant
Agent, light stabilizer etc. carry out the stabilized processing of weather resistance to product.Antioxidant, light stabilizer technology application and its add
The research of work technique directly influences the validity of product weather resistance stabilization processes.The antioxidant of domestic production at present can divide
For Hinered phenols, phosphorous acid esters and thioesters three types；Light stabilizer can be divided into hindered amines, benzotriazole and two
Benzophenone class three types.Compounding between different type antioxidant and light stabilizer can generate collaboration or anti-synergistic effect,
Directly influence the persistence of the weather resistance of product.
Titanium dioxide is a kind of widely applied inorganic pigment, can be divided into rutile type titanium white and sharp according to crystal structure
Titanium-type titanium dioxide.Relative to anatase thpe white powder, rutile type titanium white has better weatherability, therefore rutile titanium dioxide
Powder is the preferred ultraviolet light screener of weather-proof polyvinyl chloride (PVC) product.The titanium dioxide that the country uses is as white pigment
Meanwhile it also can be used as ultraviolet light screener；And the ability of the uvioresistant irradiation of titanium dioxide and anti-oxidant grade weather resistances
Depend primarily on the consistency of its surface inorganic coating layer.Domestic titanium dioxide is although cheap, but due to technology and at
This reason of, the clad of outer surface often coats unevenly or clad is weaker, leads to the TiO of internal layer2By
Electronics is lost after photocatalysis and becomes active oxygen atom, accelerates the degradation and aging of PVC-U pipeline instead.
Therefore, it is modified cladding to improve the necessary surface to titanium dioxide of weather resistance of PVC product, if can
Titanium dioxide, which is combined the modified weatherability to improve product with light stabilizer and antioxidant, will have more great research meaning
Justice.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of high-weatherability energy PVC-U drainpipe, this hairs
The PVC-U drainpipe of bright offer is on the basis of keeping excellent mechanical properties and processing performance, by the way that novel weathering resistant agent is added,
Weather resistance on the basis of the original mechanical property of PVC-U drainpipe is kept to be significantly improved.
Another object of the present invention is to provide the preparation methods of above-mentioned PVC-U drainpipe.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of high-weatherability energy PVC-U drainpipe, the PVC-U drainpipe are grouped as by the group of following mass fraction:
100 parts of polyvinyl chloride resin；
1~3 part of heat stabilizer；
0.5~3 part of weather resisting agent；
1~30 part of filler；
1~5 part of impact modifier；
0.1~5 part of lubricant；
0.5~5 part of processing aid；
Wherein, the weather resisting agent is to be coated obtained by light stabilizer and antioxidant using coupling agent on titanium dioxide surface.
The mass ratio of the summation and titanium dioxide of the light stabilizer and antioxidant is 0.1~1:10；The light stabilizer and
The mass ratio of antioxidant is 0.5~2:1.
The present invention enables light stabilizer and antioxidant very by compounding light stabilizer and antioxidant with titanium dioxide
Good is coated on titanium dioxide surface and forms compacted zone, and a kind of novel weathering resistant agent suitable for PVC-U drainpipe has been made.In reality
Inventors have found that the dosage relation difference between light stabilizer and antioxidant will not directly result in the collaboration effect of the two during testing
It answers or anti-synergistic effect；There is synergistic effect, Ke Yida both when the mass ratio of light stabilizer and antioxidant is 0.5~2:1
To the effect of decrement synergy.Inventor, which also found, to be 0.1~1 according to mass ratio by light stabilizer and antioxidant and titanium dioxide:
When 10 ratio is compounded, the precipitation of stabilizer on the one hand can be reduced, titanium dioxide surface cladding on the other hand can be improved
The thickness and stability of layer；Above-mentioned novel weathering resistant agent is being applied in the formula of PVC-U drainpipe, PVC-U row can kept
The weather resistance of tubing is significantly improved on the basis of the original mechanical property of water pipe.
Preferably, the mass ratio of the summation and titanium dioxide of the light stabilizer and antioxidant is 1:10.
Preferably, the mass ratio of the light stabilizer and antioxidant is 1:1.
Preferably, the weather resisting agent the preparation method comprises the following steps: by titanium dioxide, light stabilizer, antioxidant and coupling agent mix, use
High speed mixing smelting machine is mediated, and it is spare that cooling is stirred in cold batch mixer.
Preferably, the light stabilizer is hindered amine light stabilizer, and the antioxidant is Hinered phenols antioxidant.
It is further preferable that the hindered amine light stabilizer is one or more of GW-622, GW944Z or GW-544；
The antioxidant is one or more of 1010,1076 or PKY-168.
Preferably, the titanium dioxide is rutile type titanium white.
Preferably, the coupling agent is titante coupling agent and/or silane coupling agent.
Preferably, the heat stabilizer is calcium zinc stabilizer and/or organic tin stabilizer.
Preferably, the filler is one or more of calcium carbonate, kaolin, talcum powder or silica.
Preferably, the impact modifier is esters of acrylic acid and/or methyl methacrylate-butadiene-styrene
(ABS).
Preferably, the lubricant is one of stearic acid, polyethylene wax or paraffin or several；
Preferably, the processing aid is acrylic processing aid.
The preparation method of above-mentioned high-weatherability energy PVC-U drainpipe, described method includes following steps:
S1: titanium dioxide, light stabilizer, antioxidant and coupling agent are mixed, mediated with high speed mixing smelting machine, then at cold batch mixer
Middle stirring cooling is spare；
S2: weather resisting agent obtained by remaining each component in formula and S1 mix, mixed in high speed mixer and be dispersed to 80~
130 DEG C, it is spare to then drain into stirring cooling in cold mixer；
S3: mixture obtained by S2 is added twin-screw extrude into plasticating extrusion up to the high-weatherability energy PVC-
U drainpipe.
Preferably, double screw extruder is conical double screw extruder, and barrel temperature is 140~190 DEG C, and forming temperature is
140~220 DEG C.
Compared with prior art, the invention has the following beneficial effects:
PVC-U drainpipe provided by the invention passes through addition on the basis of keeping excellent mechanical properties and processing performance
Novel weathering resistant agent improves the weather resistance of PVC-U drainpipe.The weather resistance of PVC-U drainpipe provided by the invention is in people
Under conditions of work simulating natural environment (irradiation intensity 50%, temperature 50 C rain), using xenon lamp as light source, after aging 48h, with
The color difference grade of not aged material meets the requirement of GB/T 5836.1 between 3~5 grades.PVC-U row provided by the invention
The problem of jaundice, cracking, mechanical properties decrease, will not occur in natural environment when long period use outdoors for water pipe.
Specific embodiment
Below with reference to example, the present invention is described further, and the given examples are served only to explain the present invention, but the present invention
Claimed range is not limited to the range that example is stated.
Embodiment 1
A kind of high-weatherability PVC-U drainpipe formula are as follows: 100 parts of polyvinyl chloride resins, 3 parts of calcium zinc stabilizers, 1 part of weather resisting agent, 15
Part calcium carbonate, 3 parts of ABS, 4 parts of PE waxes, 3 parts of processing aids.Wherein weather resisting agent component are as follows: light stabilizer GW-622/ antioxidant
1010 ratio is 2:1, and the two gross mass accounts for titanium dioxide mass fraction 5%, and coupling agent used is titante coupling agent.
Above-mentioned high-weatherability PVC-U drainpipe the preparation method is as follows:
S1: titanium dioxide, light stabilizer, antioxidant and coupling agent are mixed, mediated with high speed mixing smelting machine, then at cold batch mixer
Middle stirring cooling is spare；
S2: after each component is prepared by mass parts, being added in high speed mixer, and whipping temp is set in 90 DEG C, and stirring extremely should
It is discharged into when temperature in cold mixer and stirs cooling；
S3: and then adding twin-screw extrude melting extrusion plasticizing forming for material after cooling, wherein twin-screw extrusion
The temperature of machine machine barrel is respectively set as 175 DEG C, 170 DEG C, and forming temperature is respectively 175 DEG C, 185 DEG C, and extrusion is prepared high resistance to
Wait performance PVC-U drainpipe.
Embodiment 2
A kind of high-weatherability PVC-U drainpipe formula are as follows: 100 parts of polyvinyl chloride resins, 3 parts of calcium zinc stabilizers, 0.5 part of weather resisting agent,
25 parts of calcium carbonate, 3 parts of ABS, 4 parts of PE waxes, 3 parts of processing aids.Wherein weather resisting agent component are as follows: light stabilizer GW-622/ antioxidant
1010 ratio is 2:1, and the two gross mass accounts for titanium dioxide mass fraction 10%, and coupling agent used is titante coupling agent.
The preparation method is the same as that of Example 1 for high-weatherability PVC-U drainpipe provided in this embodiment.
Embodiment 3
A kind of high-weatherability PVC-U drainpipe formula are as follows: 100 parts of polyvinyl chloride resins, 1 part of calcium zinc stabilizer, 3 parts of weather resisting agents, 1
Part calcium carbonate, 3 parts of ABS, 4 parts of PE waxes, 3 parts of processing aids.Wherein weather resisting agent component are as follows: light stabilizer GW-544/ antioxidant
The ratio of PKY-168 is 0.5:1, and the two gross mass accounts for titanium dioxide mass fraction 10%, and coupling agent used is titanate ester coupling
Agent.
The preparation method is the same as that of Example 1 for high-weatherability PVC-U drainpipe provided in this embodiment.
Embodiment 4
A kind of high-weatherability PVC-U drainpipe formula are as follows: 100 parts of polyvinyl chloride resins, 3 parts of calcium zinc stabilizers, 3 parts of weather resisting agents, 15
Part calcium carbonate, 3 parts of ABS, 4 parts of PE waxes, 3 parts of processing aids.Wherein weather resisting agent component are as follows: light stabilizer GW-544/ antioxidant
The ratio of PKY-168 is 1:1, and the two gross mass accounts for titanium dioxide mass fraction 0.1%, and coupling agent used is titanate ester coupling
Agent.
The preparation method is the same as that of Example 1 for high-weatherability PVC-U drainpipe provided in this embodiment.
Reference examples 1
In this reference examples other than not adding any weather resisting agent, remaining each component and content are same as Example 1.Tool
Body, the PVC-U drainpipe formula are as follows: 100 parts of polyvinyl chloride resins, 3 parts of calcium zinc stabilizers, 1 part of titanium dioxide, 15 parts of calcium carbonate, 3
Part ABS, 4 parts of PE waxes, 3 parts of processing aids.
The preparation method is the same as that of Example 1 for the high-weatherability PVC-U drainpipe that this reference examples provides.
Reference examples 2
Weather resisting agent in this reference examples selects weather resisting agent commonly used in the prior art, remaining each component and content with implementation
Example 1 is identical.Specifically, the PVC-U drainpipe formula are as follows: 100 parts of polyvinyl chloride resins, 3 parts of calcium zinc stabilizers, 1 part of weather resisting agent, 15
Part calcium carbonate, 3 parts of ABS, 4 parts of PE waxes, 3 parts of processing aids.Wherein, the weather resisting agent is β-(3,5- di-t-butyl -4- hydroxy benzenes
Base) propionic acid n-octadecyl alcohol ester.
The preparation method is the same as that of Example 1 for the high-weatherability PVC-U drainpipe that this reference examples provides.
Reference examples 3
The mass ratio of the light stabilizer and antioxidant in weather resisting agent in this reference examples not the framework of the present definition it
Interior, remaining each component and content are same as Example 1.Specifically, the PVC-U drainpipe formula are as follows: 100 parts of polyvinyl chloride resins,
3 parts of calcium zinc stabilizers, 1 part of weather resisting agent, 15 parts of calcium carbonate, 3 parts of ABS, 4 parts of PE waxes, 3 parts of processing aids.Wherein weather resisting agent component
Are as follows: the ratio of light stabilizer GW-622/ antioxidant 1010 is 1:1, and the two gross mass accounts for titanium dioxide mass fraction 5%, idol used
Connection agent is titante coupling agent.
The preparation method is the same as that of Example 1 for the high-weatherability PVC-U drainpipe that this reference examples provides.
Reference examples 4
Mass ratio in the weather resisting agent of this reference examples between light stabilizer and the summation and titanium dioxide of antioxidant is not in this hair
Within the scope of bright restriction, remaining each component and its content are same as Example 1.Specifically, the PVC-U drainpipe formula
Are as follows: 100 parts of polyvinyl chloride resins, 3 parts of calcium zinc stabilizers, 1 part of weather resisting agent, 15 parts of calcium carbonate, 3 parts of ABS, 4 parts of PE waxes, 3 parts of processing help
Agent.Wherein weather resisting agent component are as follows: the ratio of light stabilizer GW-622/ antioxidant 1010 is 2:1, and the two gross mass accounts for titanium white silty
Score 0.5% is measured, coupling agent used is titante coupling agent.
The preparation method is the same as that of Example 1 for the high-weatherability PVC-U drainpipe that this reference examples provides.
Reference examples 5
Each component and content are same as Example 1 in this reference examples, the difference is that the light in this reference examples is stablized
Agent and antioxidant do not carry out package pretreatment to titanium dioxide, but are directly mixed with PVC-U drainpipe with other each components.Tool
Body, the PVC-U drainpipe formula are as follows: 100 parts of polyvinyl chloride resins, 3 parts of calcium zinc stabilizers, 1 part of titanium dioxide, 0.04 part of light are stablized
Agent, 0.01 part of antioxidant, 15 parts of calcium carbonate, 3 parts of ABS, 4 parts of PE waxes, 3 parts of processing aids.
This reference examples provide high-weatherability PVC-U drainpipe the preparation method is as follows:
S1: after titanium dioxide, light stabilizer, antioxidant and remaining each component are prepared by mass parts, high speed mixing is added
In machine, whipping temp is set in 90 DEG C, and when stirring to the temperature, which is discharged into cold mixer, stirs cooling；
S2: and then adding twin-screw extrude melting extrusion plasticizing forming for material after cooling, wherein twin-screw extrusion
The temperature of machine machine barrel is respectively set as 175 DEG C, 170 DEG C, and forming temperature is respectively 175 DEG C, 185 DEG C, and extrusion is prepared high resistance to
Wait performance PVC-U drainpipe.
The mechanical property for the PVC-U drainpipe that the various embodiments described above and reference examples are prepared is according to GB/T 5836.1
Standard is tested, and weather resistance is according to GB/T 250-2008 " textile color stability test evaluation discoloration gray scale "
Evaluation comparison is carried out, as a result see the table below 1.
The performance test for the PVC-U drainpipe that 1 Examples 1 to 4 of table and reference examples 1~5 are prepared
。
By upper table 1 it is found that the weather resistance and mechanical property of the PVC drain pipe that various embodiments of the present invention are prepared compared with
Good, in contrast, the weather resistance for the PVC drain pipe that comparative example 1~5 is prepared is poor, is not able to satisfy making for a long time for tubing
With requiring.
Claims (10)
1. a kind of high-weatherability energy PVC-U drainpipe, which is characterized in that the PVC-U drainpipe by following mass fraction group
It is grouped as:
Wherein, the weather resisting agent is to be coated obtained by light stabilizer and antioxidant using coupling agent on titanium dioxide surface；The light
The mass ratio of the summation and titanium dioxide of stabilizer and antioxidant is 0.1~1:10, the mass ratio of the light stabilizer and antioxidant
For 0.5~2:1.
2. high-weatherability energy PVC-U drainpipe according to claim 1, which is characterized in that the light stabilizer and antioxidant
Summation and titanium dioxide mass ratio be 1:10.
3. high-weatherability energy PVC-U drainpipe according to claim 1, which is characterized in that the light stabilizer and antioxidant
Mass ratio be 1:1.
4. high-weatherability energy PVC-U drainpipe according to claim 1, which is characterized in that the preparation method of the weather resisting agent
Are as follows: titanium dioxide, light stabilizer, antioxidant and coupling agent are mixed, is mediated, is stirred in cold batch mixer cold with high speed mixing smelting machine
Spare.
5. high-weatherability energy PVC-U drainpipe according to claim 1, which is characterized in that the light stabilizer is hindered amine
Class light stabilizer, the antioxidant are Hinered phenols antioxidant.
6. high-weatherability energy PVC-U drainpipe according to claim 1, which is characterized in that the titanium dioxide is rutile-type
Titanium dioxide.
7. high-weatherability energy PVC-U drainpipe according to claim 1, which is characterized in that the coupling agent is titanate ester
Coupling agent and/or silane coupling agent.
8. high-weatherability energy PVC-U drainpipe according to claim 1, which is characterized in that the filler is calcium carbonate, kaolinite
One or more of soil, talcum powder or silica.
9. high-weatherability energy PVC-U drainpipe according to claim 1, which is characterized in that the impact modifier is propylene
Esters of gallic acid and/or Methyl Methacrylate-Butadiene-Styrene Copolymer.
10. the preparation method of any high-weatherability energy PVC-U drainpipe of claim 1~9, which is characterized in that the side
Method includes the following steps:
S1: titanium dioxide, light stabilizer, antioxidant and coupling agent are mixed, is mediated with high speed mixing smelting machine, is stirred in cold batch mixer
It is spare to mix cooling；
S2: remaining each component in formula is mixed with weather resisting agent obtained by S1, mixing is dispersed to 80~130 in high speed mixer
DEG C, it is spare to then drain into stirring cooling in cold mixer；
S3: mixture obtained by S2 is added twin-screw extrude into plasticating extrusion and is arranged up to the high-weatherability energy PVC-U
Water pipe.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107603066A (en) * | 2017-09-28 | 2018-01-19 | 江苏凤腾塑料有限公司 | A kind of compound PVC downpipes |
| CN109867875B (en) * | 2017-12-05 | 2021-06-15 | 呼和浩特市君子兰塑胶有限责任公司 | PVC-U water supply pipe |
| CN108250614A (en) * | 2017-12-29 | 2018-07-06 | 浙江中财管道衍生产品有限公司 | A kind of unleaded PVC-U fishery cultivatings water transferring line of toughening |
| CN108822424A (en) * | 2018-05-18 | 2018-11-16 | 广州特种承压设备检测研究院 | PVC-U pipe fitting and the preparation method and application thereof |
| CN108822425A (en) * | 2018-05-18 | 2018-11-16 | 广州特种承压设备检测研究院 | PVC-U tubing and the preparation method and application thereof |
| CN109054216B (en) * | 2018-05-29 | 2021-02-05 | 广东联塑科技实业有限公司 | Hard polyvinyl chloride double-wall corrugated pipe and preparation method thereof |
| CN108727743A (en) * | 2018-06-29 | 2018-11-02 | 广西金盛科技发展有限公司 | PVC-U noise elimination drainpipes |
| CN110286082B (en) * | 2019-06-25 | 2021-12-14 | 河南佰利联新材料有限公司 | Rapid testing method for weather resistance of titanium dioxide and application |
| CN112210175B (en) * | 2020-10-29 | 2022-01-28 | 南京联塑科技实业有限公司 | Low-temperature impact resistant PVC product and preparation method and application thereof |
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| JP4678099B2 (en) * | 2001-06-12 | 2011-04-27 | 戸田工業株式会社 | Organic-inorganic composite pigment, paint using the organic-inorganic composite pigment, and resin composition using the organic-inorganic composite pigment |
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| EP2272921A1 (en) * | 2005-02-24 | 2011-01-12 | A. Schulman Plastics | Oxo-degradability inducing substance |
| CN104788725A (en) * | 2015-03-25 | 2015-07-22 | 合肥工业大学 | Light stabilizer with ultraviolet ray shielding and absorbing functions and preparation method thereof |
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