CN106589690A - High-impact-strength transparent PVC/MBS alloy material and preparation method thereof - Google Patents
High-impact-strength transparent PVC/MBS alloy material and preparation method thereof Download PDFInfo
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- CN106589690A CN106589690A CN201611138704.0A CN201611138704A CN106589690A CN 106589690 A CN106589690 A CN 106589690A CN 201611138704 A CN201611138704 A CN 201611138704A CN 106589690 A CN106589690 A CN 106589690A
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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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- 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
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
Abstract
The invention discloses a high-impact-strength transparent PVC/MBS alloy material and a preparation method thereof. The alloy material comprises, by mass, 100 parts of PVC resin, 50-120 parts of MBS resin, 4.0-6.0 parts of stabilizer, 4.0-8.0 parts of impact modifier, 3.0-5.0 parts of processing auxiliary, 1.0-3.0 parts of weather-resistant agent and 5.0-25.0 parts of inorganic filler. Being mixed evenly according to a certain process by means of a high cooling mixing unit, the raw materials are extruded through a conical dual-screw extruder and granulated. The formula is further optimized, impact resistance of PVC is greatly improved, and transparency is also improved. The situation that a plasticizer is used in the prior art for changing the plasticity of PVC is abandoned, MBS and PVC are mixed to adjust the plasticity of PVC, and the prepared PVC/MBS alloy material can be used in the aspect of transparent PVC profiles, sheets, PVC transparent environment-friendly hoses, transparent packages, daily stationery plastic and the like.
Description
Technical field
The present invention relates to alloy material and preparation method thereof, and in particular to a kind of high-impact transparent PVC/MBS alloy materials and
Its preparation method.
Background technology
Main Ingredients and Appearance for transparent PVC section bar, the PVC co-extrusion material of piece timber-used is polrvinyl chloride, it is possible to additionally incorporate plasticising
The adjuvants such as agent, stabilizer, modifier are increasing its thermostability, toughness, processability etc..PVC is to be liked in the world today deeply
Love, rather prevalence and a kind of synthetic material being also widely used.PVC-U section bars, sheet material are that the one kind being widely used is new
The building of type, electronics, packaging material, as its physical property is for example rigid, elastic, corrosion-resistant, ageing resistace is excellent, generally uses
Work is the good succedaneum of the non-ferrous metals such as copper, zinc, aluminum.But, the transparent PVC that major part manufacturer produces at present is special-shaped
Material, sheet material, black brittleness are simultaneously bad, and falling ball impact test at low temperature Jing does not often pass a test, especially during winter use, it is easier to open
Split.Mist phenomenon is sent out simultaneously as with the addition of plasticizer and easily occur surface in use, this phenomenon is with plasticizer addition
Increase and it is all the more serious.The transparent PVC product of prior art production limits use environment and range of application.
The content of the invention
Goal of the invention：The present invention is directed to deficiency of the prior art, propose a kind of high-impact transparent PVC/MBS alloy materials and
Its preparation method.
Technical scheme：A kind of high-impact transparent PVC/MBS alloy materials of the present invention, including the group of following mass fraction
Point：
100 parts of PVC resins
50 ~ 120 parts of MBS resins
4.0 ~ 6.0 parts of stabilizer
4.0 ~ 8.0 parts of impact modifier
3.0 ~ 5.0 parts of processing aid
1.0 ~ 3.0 parts of weather resisting agent
5.0 ~ 25.0 parts of inorganic filler.
Further, the PVC resins can be SG-5 or SG-7 type resins.
Further, the MBS resins are using synthesis MBS resins.
Further, the stabilizer adopts calcium-zinc composite stabilizing agent.
Further, the impact modifier is acrylate impact modifier.
Further, the processing aid presses 6 ~ 9 by ACR-201 and EBS waxes：1 ~ 4 weight proportion compounding is formed.
Further, the weather resisting agent presses 2 ~ 5 successively by antioxidant, light stabilizer and UV absorbent：2~4 ：
3 ~ 4 weight proportion compounding is formed.
Further, the inorganic filler is activated Calcium carbonate or nanometer grade calcium carbonate.
The invention also discloses a kind of preparation method of above-mentioned high-impact transparent PVC/MBS alloy materials, comprises the steps：
（1）Antioxidant, light stabilizer, UV absorbent are pressed 2 ~ 5 successively：2~4 ：3 ~ 4 weight proportion is compounded, plus
Enter in batch mixer, with the speed mixing 60s of 1200 ~ 1400r/min, prepare weather resisting agent, it is standby；
（2）ACR-201 and EBS waxes are pressed into 6 ~ 9：1 ~ 4 weight proportion is compounded, in adding batch mixer, with 1200 ~
The speed mixing 60s of 1400r/min, prepares processing aid, standby；
（3）It it is 100 parts according to PVC resins, the ratio that 4.0 ~ 6.0 parts of stabilizer is thrown in the mixed pot of height of high cold mixer group
Mixed on low speed 3 ~ 5 minutes, adds 3.0 ~ 5.0 parts of processing aid, 50 ~ 120 parts of MBS resins and weather resisting agent 1.0 ~ 3.0
Part, high-speed stirred is changed to, mixed material mixes high-speed friction intensification in pot high, when temperature reaches 70 DEG C ~ 80 DEG C, is changed to low speed
And 10.0 ~ 50.0 parts of inorganic filler is added, after inorganic filler is mixed homogeneously with the material for previously adding, then change mixed at high speed, mix
In pot, high-speed friction heats up material again, when temperature reaches 110 DEG C ~ 120 DEG C, mixes in the cold mixing pot of blowing to high cold mixer group
Close, when temperature is down to 50 ± 5 DEG C, removable material to extruder is extruded；
（4）By step（3）At a temperature of 160 ~ 170 DEG C, engine speed is the material for mixing conical-double -helical rod extruder
800r/min is extruded, and die head is using fervent air-cooled pelletize.
Beneficial effect：The purpose of the present invention is to provide a kind of high-impact, transparent PVC/MBS for the deficiencies in the prior art
Alloy material and preparation method thereof, MBS resins are mixed with polyvinyl chloride resin in appropriate proportions, and scattered granule gradually gathers shape
Into island structure.When material is subject to external impacts, the rubbery kernel in MBS resins is stress concentration point so as to produce deformation, and
Crazing and shear band are induced around, by crazing and shear band dispersion and apparatus with shock absorbing, define material disconnected from fragility
The transformation to ductile rupture is split, so as to reach toughness reinforcing purpose.
MBS resins index of refraction is close with PVC, is for the modified optimal materials to manufacture transparent article of PVC.It is general next
Say, MBS has the suitable compatibility when being blended with PVC, and is improved the stability of co-mixing system.The vitrification temperature of MBS
Degree is than relatively low, therefore can promote the shock resistance of PVC in certain low temperature ranges.The toughness and processing characteristics for improving PVC is MBS
Another important performance, that is, improve friction come the intragranular disintegration for promoting PVC and further gelation, shorten the melting time, reduce
Residence time of material, prevents from decomposing, finally improves processing characteristics.The alloy material can be used for PVC-U profile shapes co-extrusion material, to improve
The black brittleness and anti-cracking performance of PVC-U profile shapes, and due to its transparency, add the pearlescent pigment of 2-5 parts, for doing
Metallochrome co-extrusion material is also very excellent.The present invention is greatly improved PVC notch shocks by further optimizing to formula
Property, while transparency also increases.The present invention has been abandoned and had changed PVC plastic with plasticizer in the past, and adopts MBS and PVC altogether
The plasticity for mixing to adjust PVC, is a kind of new thinking, caused by this approach avoid the not environmentally property and easy animal migration of plasticizer
The occurrence of possibility that PVC product surface has precipitation to turn white etc..PVC/MBS alloy materials prepared by this invention, can be used on transparent
PVC profile, sheet material, PVC transparent environmental protection flexible pipe, transparent wrapper, the aspect such as daily stationery plastics.
Specific embodiment
With reference to specific embodiment, the invention will be further described：
Embodiment 1
A kind of high-impact transparent PVC/MBS alloy materials and preparation method thereof, are mixed by the material and proportioning of following mass fraction：
100 parts of PVC resins
100 parts of MBS resins
5 parts of stabilizer
5 parts of impact modifier
4 parts of processing aid
2 parts of weather resisting agent
10 parts of inorganic filler.
Further, the stabilizer is calcium-zinc composite stabilizing agent.
Further, the impact modifier is acrylate impact modifier.
Further, the processing aid presses 8 by ACR-201, EBS wax：2 weight proportion compounding is formed.
Further, the weather resisting agent is by antioxidant 1010, hindered amine as light stabilizer 770, ultraviolet absorbent UV-531
By 5：2 ：3 weight proportion compounding is formed.
Further, the inorganic filler is nano-calcium carbonate, and particle diameter is 50nm.
Further, described PVC resins can be SG-5 type resins.
Further, described MBS resins can be synthesis MBS resins.
Its preparation method specifically includes following steps：
（1）Antioxidant, light stabilizer, UV absorbent are pressed 5 successively：2 ：3 weight proportion is compounded, and adds batch mixing
In machine, mix 60s in beating in powder cylinder for model SRL110-100 with the speed of 1400r/min, prepare weather resisting agent,
It is standby；
（2）ACR-201 and EBS waxes are pressed into 8：2 weight proportion is compounded, and adds batch mixer（Model SRL110-100
Play powder cylinder）In, with the speed mixing 60s of 1400r/min, processing aid is prepared, it is standby；
（3）It it is 100 parts according to PVC resins, the ratio that 5.0 parts of stabilizer throws the high cold mixer group in SRL-Z200/500
The mixed pot of height in mixed on low speed 4 minutes, add 2.0 parts of 4.0 parts of processing aid, 100 parts of MBS resins and weather resisting agent,
High-speed stirred is changed to, mixed material mixes high-speed friction intensification in pot high, when temperature reaches 75 DEG C, is changed to low speed and adds nothing
10.0 parts of machine filler, after inorganic filler is mixed homogeneously with the material for previously adding（About 3 minutes）, then change mixed at high speed, mix in pot
High-speed friction heats up material again, when temperature reaches 115 DEG C, is discharged to the cold mixing pot of the high cold mixer group of SRL-Z200/500
Middle cooling, when temperature is down to 50 DEG C, removable material to extruder is extruded；
（4）By step（3）The material for mixing conical-double -helical rod extruder is at 160 ~ 170 DEG C（Due to having length in extruder
The heating chamber of degree, heating intracavity are provided with multiple calandrias along length bearing of trend, and temperature of each calandria in heating is equal
Differ, so the heating chamber of extruder allows control to work within the scope of certain temperature in the course of the work）At a temperature of, spiral shell
Bar rotating speed is extruded for 800r/min, and die head obtains a kind of high-impact transparent PVC/MBS alloy materials using fervent air-cooled pelletize.
Comparative example：
This comparative example is ordinary soft transparent PVC material, is to use DOP plasticizers, and the following material of comparative example and proportioning mix：
100 parts of PVC resins
40 parts of DOP
5 parts of stabilizer
5 parts of impact modifier
4 parts of processing aid
2 parts of weather resisting agent
10 parts of inorganic filler.
The stabilizer is calcium-zinc composite stabilizing agent.
The impact modifier is acrylate impact modifier.
The processing aid presses 8 by ACR-201, PE wax：2 weight proportion compounding is formed.
The weather resisting agent presses 5 by antioxidant 1010, hindered amine as light stabilizer 770, ultraviolet absorbent UV-531：2 ：3
Weight proportion compounding form.
The inorganic filler is activated Calcium carbonate, and particle diameter is 2500 mesh.
Described PVC resins can be SG-5 type resins.
The preparation method of comparative example material specifically includes following steps：
（1）Antioxidant, light stabilizer, UV absorbent are pressed 5 successively：2 ：3 weight proportion is compounded, and adds batch mixing
In machine, mix 60s in beating in powder cylinder for model SRL110-100 with the speed of 1400r/min, prepare weather resisting agent,
It is standby；
（2）ACR-201 and PE waxes are pressed into 8：2 weight proportion is compounded, and adds batch mixer（Model SRL110-100 is beaten
Powder cylinder）In, with the speed mixing 60s of 1400r/min, processing aid is prepared, it is standby；
（3）It is 100 parts according to PVC resins, 5.0 parts of stabilizer, 4.0 parts of processing aid, the ratio of 2.0 parts of weather resisting agent
Example throws mixed on low speed 3 minutes in the mixed pot of height of high cold mixer group in SRL-Z200/500, is then changed to high-speed stirred, mixes
Material mixes high-speed friction intensification in pot high, when temperature reaches 75 DEG C, is changed to low speed and adds 10.0 parts of inorganic filler, DOP
40 parts, after mixing homogeneously with the material for previously adding（About 3 minutes）, then change mixed at high speed, mix in pot material high-speed friction liter again
Temperature, when temperature reaches 115 DEG C, cools down in the cold mixing pot of the high cold mixer group for being discharged to SRL-Z200/500, treats that temperature is down to
When 50 DEG C, removable material to extruder is extruded；
（4）By step（3）The material for mixing conical-double -helical rod extruder is at 160 ~ 170 DEG C（Due to having length in extruder
The heating chamber of degree, heating intracavity are provided with multiple calandrias along length bearing of trend, and temperature of each calandria in heating is equal
Differ, so the heating chamber of extruder allows control to work within the scope of certain temperature in the course of the work）At a temperature of, spiral shell
Bar rotating speed is extruded for 800r/min, and die head obtains comparative example material using fervent air-cooled pelletize.
A kind of high-impact transparent PVC/MBS alloy materials drawn according to embodiment, with comparative example material, show that the present invention's is right
Than validation test result such as following table：
As can be seen from the above table, compared with ordinary soft transparent PVC material, a kind of high-impact transparent PVC obtained by the present invention/
The electronic cantilever beam impact strength of MBS alloy materials, tensile strength, elongation at break, Vicat softening point all increase, especially thoroughly
Bright property and anti-precipitation are better than ordinary soft transparent PVC material, are a kind of the new material modified of more high-quality.
The above, is only presently preferred embodiments of the present invention, not makees any type of restriction to the present invention, every
Any simple modification made to above example according to the technical spirit of the present invention or equivalent variations and modification, still fall within this
In the range of inventive technique scheme.
Claims (9)
1. a kind of high-impact transparent PVC/MBS alloy materials, it is characterised in that：Including the component of following mass fraction：
100 parts of PVC resins
50 ~ 120 parts of MBS resins
4.0 ~ 6.0 parts of stabilizer
4.0 ~ 8.0 parts of impact modifier
3.0 ~ 5.0 parts of processing aid
1.0 ~ 3.0 parts of weather resisting agent
5.0 ~ 25.0 parts of inorganic filler.
2. a kind of high-impact transparent PVC/MBS alloy materials according to claim 1, it is characterised in that：The PVC resins
Can be SG-5 or SG-7 type resins.
3. a kind of high-impact transparent PVC/MBS alloy materials according to claim 1, it is characterised in that：The MBS resins are adopted
With synthesis MBS resins.
4. a kind of high-impact transparent PVC/MBS alloy materials according to claim 1, it is characterised in that：The stabilizer is adopted
Use calcium-zinc composite stabilizing agent.
5. a kind of high-impact transparent PVC/MBS alloy materials according to claim 1, it is characterised in that：It is described impact-resistant modified
Agent is acrylate impact modifier.
6. a kind of high-impact transparent PVC/MBS alloy materials according to claim 1, it is characterised in that：The processing aid
6 ~ 9 are pressed by ACR-201 and EBS waxes：1 ~ 4 weight proportion compounding is formed.
7. a kind of high-impact transparent PVC/MBS alloy materials according to claim 1, it is characterised in that：The weather resisting agent by
Antioxidant, light stabilizer and UV absorbent press 2 ~ 5 successively：2~4 ：3 ~ 4 weight proportion compounding is formed.
8. a kind of high-impact transparent PVC/MBS alloy materials according to claim 1, it is characterised in that：The inorganic filler
For activated Calcium carbonate or nanometer grade calcium carbonate.
9. the preparation method of a kind of high-impact transparent PVC/MBS alloy materials according to claim 1-8 is arbitrary, which is special
Levy and be：Comprise the steps：
（1）Antioxidant, light stabilizer, UV absorbent are pressed 2 ~ 5 successively：2~4 ：3 ~ 4 weight proportion is compounded, plus
Enter in batch mixer, with the speed mixing 60s of 1200 ~ 1400r/min, prepare weather resisting agent, it is standby；
（2）ACR-201 and EBS waxes are pressed into 6 ~ 9：1 ~ 4 weight proportion is compounded, in adding batch mixer, with 1200 ~
The speed mixing 60s of 1400r/min, prepares processing aid, standby；
（3）It it is 100 parts according to PVC resins, the ratio that 4.0 ~ 6.0 parts of stabilizer is thrown in the mixed pot of height of high cold mixer group
Mixed on low speed 3 ~ 5 minutes, adds 3.0 ~ 5.0 parts of processing aid, 50 ~ 120 parts of MBS resins and weather resisting agent 1.0 ~ 3.0
Part, high-speed stirred is changed to, mixed material mixes high-speed friction intensification in pot high, when temperature reaches 70 DEG C ~ 80 DEG C, is changed to low speed
And 10.0 ~ 50.0 parts of inorganic filler is added, after inorganic filler is mixed homogeneously with the material for previously adding, then change mixed at high speed, mix
In pot, high-speed friction heats up material again, when temperature reaches 110 DEG C ~ 120 DEG C, mixes in the cold mixing pot of blowing to high cold mixer group
Close, when temperature is down to 50 ± 5 DEG C, removable material to extruder is extruded；
（4）By step（3）At a temperature of 160 ~ 170 DEG C, engine speed is the material for mixing conical-double -helical rod extruder
800r/min is extruded, and die head is using fervent air-cooled pelletize.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108503993A (en) * | 2018-05-07 | 2018-09-07 | 陈丽 | A kind of high impact resistant and thermal resistant PVC/MBS alloy materials |
| CN112029211A (en) * | 2020-09-15 | 2020-12-04 | 扬州金艺娱乐用品有限公司 | Crystal plastic transparent card plate and preparation method thereof |
| CN117106268A (en) * | 2023-09-07 | 2023-11-24 | 杭州管康塑业有限公司 | High-impact-resistance high-weather-resistance PVC reinforced pipe and preparation method thereof |
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| CN101914251A (en) * | 2010-08-20 | 2010-12-15 | 浙江大学 | Method for preparing high-flow high-heat-resistance transparent polyvinyl chloride alloy capable of injection molding |
| CN103102608A (en) * | 2011-11-14 | 2013-05-15 | 天津德昊超微新材料有限公司 | Material special for high-transparency environment-friendly flame-retardant polyvinyl chloride injection molding |
| CN103467884A (en) * | 2013-09-02 | 2013-12-25 | 佛山市凯粤天雄塑料科技有限公司 | High-weatherability environmental-friendly white co-extruded PVC (Polyvinyl Chloride) modified material and preparation method thereof |
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- 2016-12-12 CN CN201611138704.0A patent/CN106589690A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914251A (en) * | 2010-08-20 | 2010-12-15 | 浙江大学 | Method for preparing high-flow high-heat-resistance transparent polyvinyl chloride alloy capable of injection molding |
| CN103102608A (en) * | 2011-11-14 | 2013-05-15 | 天津德昊超微新材料有限公司 | Material special for high-transparency environment-friendly flame-retardant polyvinyl chloride injection molding |
| CN103467884A (en) * | 2013-09-02 | 2013-12-25 | 佛山市凯粤天雄塑料科技有限公司 | High-weatherability environmental-friendly white co-extruded PVC (Polyvinyl Chloride) modified material and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108503993A (en) * | 2018-05-07 | 2018-09-07 | 陈丽 | A kind of high impact resistant and thermal resistant PVC/MBS alloy materials |
| CN112029211A (en) * | 2020-09-15 | 2020-12-04 | 扬州金艺娱乐用品有限公司 | Crystal plastic transparent card plate and preparation method thereof |
| CN117106268A (en) * | 2023-09-07 | 2023-11-24 | 杭州管康塑业有限公司 | High-impact-resistance high-weather-resistance PVC reinforced pipe and preparation method thereof |
| CN117106268B (en) * | 2023-09-07 | 2024-04-16 | 杭州管康塑业有限公司 | High-impact-resistance high-weather-resistance PVC reinforced pipe and preparation method thereof |
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