CN110655736A - Ultraviolet-resistant PVC material and preparation process thereof - Google Patents
Ultraviolet-resistant PVC material and preparation process thereof Download PDFInfo
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- CN110655736A CN110655736A CN201910941722.XA CN201910941722A CN110655736A CN 110655736 A CN110655736 A CN 110655736A CN 201910941722 A CN201910941722 A CN 201910941722A CN 110655736 A CN110655736 A CN 110655736A
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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
- 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
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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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
- C08L2201/08—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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses an anti-ultraviolet PVC material and a preparation method thereof, which improve the light-resistant performance of the material by combining a physical method and a chemical method. Firstly, adding physical protective agents, namely active mica powder and nano-scale titanium dioxide, wherein when the surface of the material is irradiated by ultraviolet rays, the mica is a flaky crystal which can absorb ultraviolet rays, reflect and scatter the ultraviolet rays and can transmit visible light, and the nano-scale titanium dioxide also has the functions, and both the mica and the nano-scale titanium dioxide belong to ultraviolet protective agents with physical shielding functions; a chemical protectant-UV-531 is added, UV-531 being used to absorb the unshielded UV light.
Description
Technical Field
The invention relates to the field of PVC production, and particularly relates to an ultraviolet-resistant PVC material and a preparation process thereof.
Background
The PVC material can generate photo-oxidative aging phenomena such as color change, embrittlement, crack, pulverization and the like in long-term use in the sun and rain. Cables, automobile exterior decorations, pipes and the like are all products which are exposed outdoors for a long time and have weather resistance requirements. Especially for light-colored products, ultraviolet rays can penetrate through the surface layer of the material to damage the inside, and the oxidation and the decomposition are accelerated. In general, we will design an anti-UV product, and consider an anti-UV agent, such as benzophenone or benzotriazole, commonly used in UV-531, UV-9, UV-P, etc., which functions to absorb UV light and convert it into heat energy to be dissipated. However, the anti-ultraviolet auxiliary agent is easy to extract and expensive, and the protective effect is weak due to insufficient actual dosage caused by dosage control of many enterprises. Therefore, other methods for solving the problem of ultraviolet resistance of materials are needed.
Disclosure of Invention
The invention mainly solves the technical problem of providing an anti-ultraviolet PVC material and a preparation process thereof, which can improve the light-resistant performance of the material by combining a physical method and a chemical method.
In order to solve the technical problems, the invention adopts a technical scheme that: the ultraviolet-resistant PVC material is prepared from the following raw materials in parts by weight:
100 parts of PVC resin powder, 50-80 parts of plasticizer, 5-8 parts of heavy calcium powder, 0.5-1 part of pigment carbon black, 5-10 parts of calcium-zinc composite stabilizer, 0.5-1 part of antioxidant, 0.5-1 part of ultraviolet absorbent, 1-2 parts of stearic acid, 2-4 parts of coupling mica, 1-2 parts of nano titanium dioxide and 5-10 parts of processing aid;
plasticizer: 60% of diisononyl phthalate DINP, 30% of dioctyl adipate DOA and 10% of epoxidized soybean oil, so that the material is endowed with flexibility;
ultraviolet absorber: converting light energy of different wave bands in ultraviolet rays into heat energy to avoid material photodecomposition, and using 2-hydroxy-4-n-octoxy benzophenone, which is called UV-531 for short;
stearic acid: internal lubricant stearic acid; the uniformity and the fluidity of the material dispersion are improved, and the processing and the demoulding are facilitated; active mica powder: sericite powder treated by a silane coupling agent; filling and keeping out of the sun;
nano-scale titanium dioxide: titanium dioxide with a particle size of 20-50 nm; whitening, absorbing light and protecting from light.
In a preferred embodiment of the invention, the suspension-process polyvinyl chloride resin S-70 with the polymerization degree of the PVC resin powder being about 1280 is a plastic matrix.
In a preferred embodiment of the invention, the heavy calcium carbonate powder is surface activated heavy calcium carbonate, the particle size is less than or equal to 10 μm, and the heavy calcium carbonate powder has a reinforcing and filling effect.
In a preferred embodiment of the invention, the pigment carbon black is special carbon black powder for plastic coloring, and is used for shielding ultraviolet light and dyeing.
In a preferred embodiment of the invention, the calcium-zinc composite stabilizer is an environment-friendly calcium-zinc salt composite stabilizer for preventing PVC from being decomposed by heat.
In a preferred embodiment of the invention, the antioxidant is an auxiliary agent 1076 for preventing PVC from oxygen absorption and aging under photo-thermal conditions.
In a preferred embodiment of the present invention, the processing aid is an acrylic synthetic resin; the processing temperature is reduced to promote plasticization and improve the toughness of the material.
In a preferred embodiment of the present invention, the method comprises the following steps:
(1) active mica powder: in order to enhance the bonding force between PVC and mica, the mica needs to be activated;
the mica powder and the silane coupling agent are premixed according to a ratio of 5:1, and the premixed powder is added into 100 parts of mica powder to be stirred for about 10 minutes at a speed of 500 rmp.
(2) Main material mixing and preplasticizing: adding PVC resin powder, a plasticizer, coarse whiting powder, pigment carbon black, a calcium-zinc composite stabilizer, an antioxidant, an ultraviolet absorbent and stearic acid into a closed high-speed mixing kettle, stirring at a high speed to ensure that various raw materials are mutually dispersed and absorbed, and completing the preplasticizing of PVC;
(3) and a low-temperature addition part: then transferring the mixture into a low-speed cooling kettle for stirring, adding active mica powder, nano titanium dioxide and a processing aid when the powder is cooled to 60 ℃, rotating at the speed of 100-;
(4) and extruding and granulating: and adding the cooled powder into a conical double-screw granulator, and extruding and granulating.
In a preferred embodiment of the present invention, the rotation speed of the high-speed mixing kettle in step 2 is 400-.
In a preferred embodiment of the present invention, the screw rotation speed in step 4 is 10-15rmp, and the plasticizing temperature is 120-.
The invention has the beneficial effects that: the invention originates from the requirement of ultraviolet resistance research of PVC materials, and improves the light-resistant performance of the materials by combining a physical method and a chemical method;
firstly, adding physical protective agent active mica powder and nano-scale titanium dioxide, wherein when the surface of the material is irradiated by ultraviolet rays, the mica is a flaky crystal which can absorb ultraviolet rays, reflect and scatter the ultraviolet rays and can transmit visible light, and the nano-scale titanium dioxide also has the functions, and both belong to a second physical shielding type ultraviolet protective agent and a chemical protective agent UV-531, wherein the UV-531 is used for absorbing unshielded ultraviolet rays;
the invention greatly improves the ultraviolet aging resistance of the material by means of physical protection, and solves the problem of protection failure caused by the extraction and migration of the ultraviolet absorbent by the solvent.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a flow chart of a preferred embodiment of the UV-resistant PVC material of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention includes:
an anti-ultraviolet PVC material is prepared from the following raw materials in parts by weight:
100 parts of PVC resin powder, 50-80 parts of plasticizer, 5-8 parts of heavy calcium powder, 0.5-1 part of pigment carbon black, 5-10 parts of calcium-zinc composite stabilizer, 0.5-1 part of antioxidant, 0.5-1 part of ultraviolet absorbent, 1-2 parts of stearic acid, 2-4 parts of coupling mica, 1-2 parts of nano titanium dioxide and 5-10 parts of processing aid;
PVC resin powder: the suspension method polyvinyl chloride resin S-70 with the polymerization degree of 1280 in the Taiwan plastic industry; is a plastic substrate;
plasticizer: taizhou union, 60% diisononyl phthalate DINP; jiaao, 30% dioctyl adipate DOA and 10% epoxidized soybean oil; imparting flexibility to the material;
③ heavy calcium powder: the particle size of the heavy calcium carbonate subjected to surface activation treatment is less than or equal to 10 mu m; reinforcing and filling functions;
pigment carbon black: carbon black powder special for plastic coloring; shielding ultraviolet light and dyeing;
calcium-zinc composite stabilizer: an environment-friendly calcium-zinc salt composite stabilizer for preventing PVC from being decomposed by heating;
sixthly, antioxidant: an auxiliary agent 1076 for preventing PVC from oxygen absorption and aging under photo-thermal conditions;
seventh, ultraviolet absorber: converting light energy of different wave bands in ultraviolet rays into heat energy to avoid material photodecomposition, and using 2-hydroxy-4-n-octoxy benzophenone, which is called UV-531 for short;
and (b) stearic acid: internal lubricant stearic acid; the uniformity and the fluidity of the material dispersion are improved, and the processing and the demoulding are facilitated;
ninthly, active mica powder: sericite powder treated by a silane coupling agent; filling and keeping out of the sun;
r nano-scale titanium dioxide: titanium dioxide with a particle size of 20-50 nm; whitening, absorbing light and avoiding light;
(2) The preparation method comprises the following steps:
i, active mica powder: in order to enhance the bonding force between PVC and mica, the mica needs to be activated first, the mica powder and the silane coupling agent are premixed according to the ratio of 5:1, and the premixed powder is added into 100 parts of mica powder to be stirred for about 10 minutes at the speed of 500 rmp;
mixing and preplasticizing main materials: adding PVC resin powder, a plasticizer, coarse whiting powder, pigment carbon black, a calcium-zinc composite stabilizer, an antioxidant, an ultraviolet absorbent and stearic acid into a closed high-speed mixing kettle, stirring at a high speed of 400-year-old 500rmp, heating to 120-year-old 130 ℃ by friction, so that various raw materials are mutually dispersed and absorbed, and the pre-plasticization of PVC is completed;
low temperature addition part: then transferring the mixture into a low-speed cooling kettle for stirring, adding active mica powder, nano titanium dioxide and a processing aid when the powder is cooled to 60 ℃, rotating at the speed of 100-;
IV, extruding and granulating: and adding the cooled powder into a conical double-screw granulator, wherein the screw rotating speed is 10-15rmp, the plasticizing temperature is 120-.
The invention achieves the following main technical indexes:
the temperature of a xenon lamp aging box is 70 ℃, the time for achieving obvious color change under different illumination intensities is tested, the color change evaluation method GB250-1995 is adopted, the experiment is stopped when the color change reaches 4 grades, and the sample capacity is 5.
Target is 2016h in light color (white) and 6048h in dark color (black) at 340 nm.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The ultraviolet-resistant PVC material is characterized by comprising the following raw materials in parts by weight:
100 parts of PVC resin powder, 50-80 parts of plasticizer, 5-8 parts of heavy calcium powder, 0.5-1 part of pigment carbon black, 5-10 parts of calcium-zinc composite stabilizer, 0.5-1 part of antioxidant, 0.5-1 part of ultraviolet absorbent, 1-2 parts of stearic acid, 2-4 parts of coupling mica, 1-2 parts of nano titanium dioxide and 5-10 parts of processing aid;
plasticizer: 60% of diisononyl phthalate DINP, 30% of dioctyl adipate DOA and 10% of epoxidized soybean oil, so that the material is endowed with flexibility;
ultraviolet absorber: converting light energy of different wave bands in ultraviolet rays into heat energy to avoid material photodecomposition, and using 2-hydroxy-4-n-octoxy benzophenone, which is called UV-531 for short;
stearic acid: internal lubricant stearic acid; the uniformity and the fluidity of the material dispersion are improved, and the processing and the demoulding are facilitated;
active mica powder: sericite powder treated by a silane coupling agent; filling and keeping out of the sun;
nano-scale titanium dioxide: titanium dioxide with a particle size of 20-50 nm; whitening, absorbing light and protecting from light.
2. The ultraviolet resistant PVC material of claim 1, wherein the PVC resin powder is suspension PVC resin S-70 with a degree of polymerization of about 1280, which is a plastic matrix.
3. The ultraviolet-resistant PVC material according to claim 1, wherein the heavy calcium carbonate powder is surface-activated heavy calcium carbonate, has a particle size of 10 μm or less, and has a reinforcing and filling effect.
4. The ultraviolet-resistant PVC material as recited in claim 1, wherein the pigment carbon black is carbon black powder specially used for coloring plastics, and is used for shielding ultraviolet light and dyeing.
5. The ultraviolet-resistant PVC material according to claim 1, wherein the calcium-zinc composite stabilizer is an environment-friendly calcium-zinc salt composite stabilizer for preventing PVC from thermal decomposition.
6. The ultraviolet-resistant PVC material of claim 1, wherein the antioxidant is an auxiliary agent 1076 for preventing PVC from oxygen absorption and aging under photo-thermal conditions.
7. The ultraviolet resistant PVC material of claim 1, wherein the processing aid is an acrylic synthetic resin; the processing temperature is reduced to promote plasticization and improve the toughness of the material.
8. The method for preparing the ultraviolet-resistant PVC material according to claim 7, which comprises the following steps:
(1) active mica powder: in order to enhance the bonding force between PVC and mica, the mica needs to be activated;
premixing mica powder and a silane coupling agent according to a ratio of 5:1, adding the premixed powder into 100 parts of mica powder, and stirring for about 10 minutes at a speed of 500 rmp;
(2) main material mixing and preplasticizing: adding PVC resin powder, a plasticizer, coarse whiting powder, pigment carbon black, a calcium-zinc composite stabilizer, an antioxidant, an ultraviolet absorbent and stearic acid into a closed high-speed mixing kettle, stirring at a high speed to ensure that various raw materials are mutually dispersed and absorbed, and completing the preplasticizing of PVC;
(3) and a low-temperature addition part: then transferring the mixture into a low-speed cooling kettle for stirring, adding active mica powder, nano titanium dioxide and a processing aid when the powder is cooled to 60 ℃, rotating at the speed of 100-;
(4) and extruding and granulating: and adding the cooled powder into a conical double-screw granulator, and extruding and granulating.
9. The method for preparing the ultraviolet-resistant PVC material as claimed in claim 8, wherein the rotation speed of the high-speed mixing kettle in step 2 is 400-500rmp, and the temperature is raised to 120-130 ℃ by friction.
10. The method for preparing UV-resistant PVC material according to claim 8, wherein the screw rotation speed in step 4 is 10-15rmp, and the plasticizing temperature is 120-150 ℃.
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| CN201910941722.XA CN110655736A (en) | 2019-09-30 | 2019-09-30 | Ultraviolet-resistant PVC material and preparation process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113549285A (en) * | 2021-08-05 | 2021-10-26 | 东莞鼎信实业有限公司 | Anti-aging PVC colloidal particle and preparation process thereof |
| CN113754970A (en) * | 2021-10-23 | 2021-12-07 | 新亚电子股份有限公司 | Anti-aging and algae-resistant PVC composition for outdoor color lamp and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3401129A (en) * | 1964-04-03 | 1968-09-10 | Allied Chem | Floor tile comprising polyvinyl chloride, chlorinated polyethylene and filler |
| CN104140617A (en) * | 2014-08-07 | 2014-11-12 | 安徽玉发塑业有限公司 | Aging-resistant PVC tubular product and preparation method thereof |
| CN109456551A (en) * | 2018-11-14 | 2019-03-12 | 无锡同济新型材料有限公司 | Low VOC weather strip for automobile PVC material and preparation method thereof |
-
2019
- 2019-09-30 CN CN201910941722.XA patent/CN110655736A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3401129A (en) * | 1964-04-03 | 1968-09-10 | Allied Chem | Floor tile comprising polyvinyl chloride, chlorinated polyethylene and filler |
| CN104140617A (en) * | 2014-08-07 | 2014-11-12 | 安徽玉发塑业有限公司 | Aging-resistant PVC tubular product and preparation method thereof |
| CN109456551A (en) * | 2018-11-14 | 2019-03-12 | 无锡同济新型材料有限公司 | Low VOC weather strip for automobile PVC material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113549285A (en) * | 2021-08-05 | 2021-10-26 | 东莞鼎信实业有限公司 | Anti-aging PVC colloidal particle and preparation process thereof |
| CN113754970A (en) * | 2021-10-23 | 2021-12-07 | 新亚电子股份有限公司 | Anti-aging and algae-resistant PVC composition for outdoor color lamp and preparation method thereof |
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