CN111205545A - Method for preventing auxiliary agent in polyethylene aging-resistant master batch from being separated out - Google Patents
Method for preventing auxiliary agent in polyethylene aging-resistant master batch from being separated out Download PDFInfo
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- CN111205545A CN111205545A CN202010202994.0A CN202010202994A CN111205545A CN 111205545 A CN111205545 A CN 111205545A CN 202010202994 A CN202010202994 A CN 202010202994A CN 111205545 A CN111205545 A CN 111205545A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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Abstract
The invention relates to a method for preventing an auxiliary agent of a polyethylene anti-aging master batch from being separated out, which comprises the following components in parts by weight: 100 parts of polyethylene, 1-5 parts of compatilizer, 10-80 parts of compatibilizer, 1-10 parts of plasticizer, 0.1-3 parts of antioxidant and 1-20 parts of light stabilizer; the invention discloses a method for preventing an additive of a polyethylene anti-aging master batch from being separated out, wherein the polyethylene belongs to a nonpolar material, the anti-aging additive generally has a certain polarity, and the poor polarity causes poor compatibility of a carrier material and the anti-aging additive; the compatilizer, the compatibilizer, the plasticizer and the like in the formula effectively solve the problem of compatibility of the matrix material and the anti-aging auxiliary agent, so that the anti-aging auxiliary agent is uniformly dispersed and is not easy to separate out.
Description
Technical Field
The invention belongs to the field of high polymer materials, and particularly relates to a method for preventing an auxiliary agent from being separated out from a polyethylene anti-aging master batch.
Background
Polyethylene (PE) is a plastic bag, which is a polymer with the simplest structure and is a polymer material with the most extensive application, and is formed by connecting repeated-CH 2-units, and the polyethylene is formed by the addition polymerization reaction of ethylene (CH 2= CH 2).
The light stabilizer is an additive of high molecular products (such as plastics, rubber, paint and synthetic fiber), and has the functions of shielding or absorbing ultraviolet energy, quenching singlet oxygen and decomposing hydroperoxide into inactive substances, so that the possibility of photochemical reaction can be eliminated or slowed down, and the photoaging process can be prevented or delayed under the radiation of light, thereby achieving the purpose of prolonging the service life of the high molecular products. Light stabilizers have different functions depending on their structures and types. Some can shield, reflect or absorb ultraviolet rays and convert the ultraviolet rays into harmless heat energy; some can quench the excited state of the molecule or group excited by ultraviolet rays, so that the molecule or group returns to the ground state, and the possibility of photo-oxidation-reduction reaction is eliminated or slowed down; some products are protected from ultraviolet rays by trapping radicals generated by photo-oxidation-reduction, thereby preventing radical reactions that lead to the aging of the products.
The main reason for shortening the service life of polyethylene greenhouse film is the aging of polyethylene, and the main reason for aging of polyethylene is the thermal oxidation and photodegradation of polyethylene. Plastic products are also hard after long-term use. This makes the movable "joints" between molecules inflexible due to the volatilization of the plasticizer, and also makes the plastic rigid because the long-chain molecules, which bite each other, are broken into short-chain molecules under the action of natural forces such as wind, rain, sun, etc. In the plastics industry, this phenomenon is referred to as "aging". The addition of light stabilizers and antioxidants is the common method for preventing polyethylene from aging.
The anti-aging master batch taking polyethylene as a carrier refers to that the master batch takes polyethylene as a carrier, and is subjected to a double-screw blending extrusion technology together with light stabilizers such as 944, 770, 119 and 2020, antioxidants such as 1010 and 168, and the like to ensure that an anti-aging auxiliary agent is intensively dispersed in polyethylene resin. The master batch can be conveniently added by downstream product processing manufacturers, the production environment and the environmental protection requirements of the downstream product processing manufacturers are improved, and the front-line workers are prevented from damaging bodies by the aid. Technically, the additive can be well mixed with resin, so that the additive can be uniformly dispersed in a product, and the function of the product can be better exerted.
The structural properties of polyethylene make it a non-polar or less polar polymer with low compatibility with polar solutions and chemicals. During the processing of the polyethylene master batch, the incompatibility between the additive and the carrier can cause the precipitation of the additive, directly leads to the reduction of the effective additive content of the master batch product, and can not play the due role of the anti-aging master batch.
Disclosure of Invention
The invention provides a method for preventing an auxiliary agent from being separated out from a polyethylene aging-resistant master batch aiming at the defects in the prior art, and aims to solve the problems in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for preventing an auxiliary agent of a polyethylene anti-aging master batch from being separated out comprises the following components in parts by weight: 100 parts of polyethylene, 1-5 parts of compatilizer, 10-80 parts of compatibilizer, 1-10 parts of plasticizer, 0.1-3 parts of antioxidant and 1-20 parts of light stabilizer.
As an improvement of the invention, the compatilizer is any one or more of a silane coupling agent KH530, a silane coupling agent KH550 and a silane coupling agent KH 560.
As an improvement of the invention, the compatibilizer is maleic anhydride grafted polyethylene.
As an improvement of the invention, the plasticizer is any one or more of aromatic oil and paraffin oil.
As an improvement of the invention, the antioxidant is any one or more of antioxidant 1010, antioxidant 168, antioxidant 1076 and antioxidant 3114.
As an improvement of the invention, the light stabilizer is one or more of UV-328, UV-329, UV-531, HALS944, HALS622, HALS770, HALS 119, HALS 123 and HALS 2020.
A method for preventing an auxiliary agent from being separated out from a polyethylene aging-resistant master batch comprises the following steps:
(1) weighing the raw materials in parts by weight;
(2) adding polyethylene and compatibilizer into a high-speed mixer, stirring for 5-20min, adding compatibilizer and plasticizer, stirring for 10-30min, adding antioxidant and light stabilizer, and stirring for 10-30 min;
(3) and (3) feeding the raw materials in the step (2) into a double-screw extruder, and extruding and granulating by the double-screw extruder.
As a modification of the invention, the length-diameter ratio of the twin-screw extruder is 40-48: 1.
As a modification of the invention, the temperature of each area from the feeding section to the die surface of the double-screw extruder is controlled to be 100-210 ℃.
In the present invention, the mechanism is schematically shown as follows:
compared with the prior art, the invention has the following beneficial effects because the technology is adopted:
the invention discloses a method for preventing an additive of a polyethylene anti-aging master batch from being separated out. The compatilizer, the compatibilizer, the plasticizer and the like in the formula effectively solve the problem of compatibility of the matrix material and the anti-aging auxiliary agent, so that the anti-aging auxiliary agent is uniformly dispersed and is not easy to separate out.
Drawings
FIG. 1 is a scanning electron micrograph of example 1;
FIG. 2 is a scanning electron micrograph of example 2;
FIG. 3 is a SEM image of example 3;
FIG. 4 is a SEM image of example 4.
Detailed Description
The antioxidants and light stabilizers in the examples were those produced by Suqian Seisaku-Tech Co.
Example 1:
adding 80kg of Polyethylene (PE) and 20kg of compatibilizer maleic anhydride grafted polyethylene (PE-MAH) into a high-speed mixer, stirring for 10min, adding 1kg of compatibilizer KH560 and 1kg of plasticizer paraffin oil, stirring for 28min, adding 3kg of antioxidant 1010, 3kg of antioxidant 168, 5kg of light stabilizer UV-531, 10kg of light stabilizer HALS944 and 10kg of light stabilizer HALS770, and mixing for 30min at 30 ℃.
Adding into a double-screw extruder (screw diameter is 50mm, length-diameter ratio is 48: 1) to extrude and granulate, and setting the temperature of each section of the extruder (from a feed inlet to a die head): 100. 150, 170, 178, 185, 190, 200 ℃. The screw speed was 350rpm and the feed speed was 120 rpm.
Example 2:
70kg of Polyethylene (PE) and 30kg of compatibilizer maleic anhydride grafted polyethylene (PE-MAH) are added into a high-speed mixer and stirred for 15min, 1kg of compatibilizer KH560 and 1kg of plasticizer paraffin oil are added and stirred for 20min, 3kg of antioxidant 1010, 3kg of antioxidant 168, 5kg of light stabilizer UV-531, 10kg of light stabilizer HALS944 and 10kg of light stabilizer HALS770 are added and mixed for 30min at 30 ℃.
Adding into a double-screw extruder (screw diameter is 50mm, length-diameter ratio is 48: 1) to extrude and granulate, and setting the temperature of each section of the extruder (from a feed inlet to a die head): 100. 150, 170, 178, 185, 190, 200 ℃. The screw speed was 350rpm and the feed speed was 120 rpm.
Example 3:
60kg of Polyethylene (PE) and 40kg of compatibilizer maleic anhydride grafted polyethylene (PE-MAH) are added into a high-speed mixer and stirred for 11min, 1kg of compatibilizer KH560 and 1kg of plasticizer paraffin oil are added and stirred for 30min, 3kg of antioxidant 1010, 3kg of antioxidant 168, 5kg of light stabilizer UV-531, 10kg of light stabilizer HALS944 and 10kg of light stabilizer HALS770 are added and mixed for 30min at 30 ℃.
Adding into a double-screw extruder (screw diameter is 50mm, length-diameter ratio is 48: 1) to extrude and granulate, and setting the temperature of each section of the extruder (from a feed inlet to a die head): 100. 150, 170, 178, 185, 190, 200 ℃. The screw speed was 350rpm and the feed speed was 120 rpm.
Example 4:
50kg of Polyethylene (PE) and 50kg of compatibilizer maleic anhydride grafted polyethylene (PE-MAH) are added into a high-speed mixer and stirred for 18min, 1kg of compatibilizer KH560 and 1kg of plasticizer paraffin oil are added and stirred for 25min, 3kg of antioxidant 1010, 3kg of antioxidant 168, 5kg of light stabilizer UV-531, 10kg of light stabilizer HALS944 and 10kg of light stabilizer HALS770 are added and mixed for 28min at 30 ℃.
Adding into a double-screw extruder (screw diameter is 50mm, length-diameter ratio is 48: 1) to extrude and granulate, and setting the temperature of each section of the extruder (from a feed inlet to a die head): 100. 150, 170, 178, 185, 190, 200 ℃. The screw speed was 350rpm and the feed speed was 120 rpm.
Through analysis of a scanning electron microscope, the formula and the preparation method of the invention effectively improve the dispersing effect of the additive and prevent the additive in the polyethylene aging-resistant master batch from being separated out, as shown in figures 1-4.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention should be defined by the claims, and equivalents including technical features of the claims, i.e., equivalent modifications within the scope of the present invention.
Claims (9)
1. The polyethylene aging-resistant master batch is characterized by comprising the following components in parts by weight: 100 parts of polyethylene, 1-5 parts of compatilizer, 10-80 parts of compatibilizer, 1-10 parts of plasticizer, 0.1-3 parts of antioxidant and 1-20 parts of light stabilizer.
2. The polyethylene aging-resistant masterbatch according to claim 1, wherein: the compatilizer is any one or more of a silane coupling agent KH530, a silane coupling agent KH550 and a silane coupling agent KH 560.
3. The polyethylene aging-resistant masterbatch according to claim 1, wherein: the compatibilizer is maleic anhydride grafted polyethylene.
4. The polyethylene aging-resistant masterbatch according to claim 1, wherein: the plasticizer is any one or more of aromatic oil and paraffin oil.
5. The polyethylene aging-resistant masterbatch according to claim 1, wherein: the antioxidant is one or more of antioxidant 1010, antioxidant 168, antioxidant 1076 and antioxidant 3114.
6. The polyethylene aging-resistant masterbatch according to claim 1, wherein: the light stabilizer is any one or more of UV-328, UV-329, UV-531, HALS944, HALS622, HALS770, HALS 119, HALS 123 and HALS 2020.
7. A method for preparing the polyethylene aging-resistant masterbatch according to claims 1 to 6, wherein the preparation method comprises the following steps:
(1) weighing the raw materials in parts by weight;
(2) adding polyethylene and compatibilizer into a high-speed mixer, stirring for 5-20min, adding compatibilizer and plasticizer, stirring for 10-30min, adding antioxidant and light stabilizer, and stirring for 10-30 min;
(3) and (3) feeding the raw materials in the step (2) into a double-screw extruder, and extruding and granulating by the double-screw extruder.
8. The method for preventing the additive of the polyethylene aging-resistant master batch from being separated out according to claim 7, is characterized in that: the length-diameter ratio of the double-screw extruder is 40-48: 1.
9. The method for preventing the additive of the polyethylene aging-resistant master batch from being separated out according to claim 7, is characterized in that: the temperature of each area of the double-screw extruder from the feeding section to the die surface is controlled to be 100-210 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112549218A (en) * | 2020-12-07 | 2021-03-26 | 广西贵港市泰翔木业有限公司 | Processing technology of light-resistant anti-aging formaldehyde-free artificial board |
| CN113462079A (en) * | 2021-07-26 | 2021-10-01 | 江门市严恩化工科技有限公司 | Light stabilizer 3853 master batch capable of preventing precipitation and blooming and preparation method thereof |
| CN115216125A (en) * | 2022-07-29 | 2022-10-21 | 宿迁联宏新材料有限公司 | Special anti-broken PET spinning weather-resistant master batch and preparation method thereof |
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Patent Citations (5)
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| CN112549218A (en) * | 2020-12-07 | 2021-03-26 | 广西贵港市泰翔木业有限公司 | Processing technology of light-resistant anti-aging formaldehyde-free artificial board |
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Application publication date: 20200529 |