A concentrated long-lasting antibacterial and antifouling polyolefin masterbatch and preparation method thereof

Abstract

The present invention belongs to the technical field of plastic masterbatch, and specifically relates to a concentrated long-acting antibacterial and antifouling polyolefin masterbatch and a preparation method thereof. A concentrated long-acting antibacterial and antifouling polyolefin masterbatch, its raw materials include 20-80 parts of polyolefin, 1-10 parts of a compatibilizer and 1-20 parts of an antibacterial agent, the antibacterial agent contains an amino group, and the preparation raw materials of the antibacterial agent are measured by weight, including 30-85 parts of a cationic polymer, 30-80 parts of a compatibilizer and 30-85 parts of an organic amine. The cationic polymer is a guanidine salt, and in the technical scheme, a maleic anhydride copolymer is reacted with polyhexamethylene biguanide hydrochloride to produce a chemical bond between polyhexamethylene biguanide hydrochloride and the maleic anhydride copolymer, thereby improving the compatibility of polyhexamethylene biguanide hydrochloride with polyolefins, and the inventor finds that polyhexamethylene biguanide hydrochloride will not precipitate on the surface of polyolefins, nor will it be separated from polyolefins, and by adding an organic amine, a chemical bond is produced between the organic amine and the maleic anhydride copolymer, which can further improve the compatibility and mechanical properties of the overall material.

Description

Technical Field

[0001] The present application belongs to the technical field of plastic masterbatches, and specifically relates to a concentrated, long-lasting antibacterial and antifouling polyolefin masterbatch and a preparation method thereof. Background Art

[0002] With the improvement of people's living standards and the improvement of health and hygiene awareness, consumers have higher and higher requirements for the antibacterial and antifouling properties of various products, especially in the fields of home appliances, medical and health, daily necessities and textiles. In order to improve the antibacterial and antifouling properties of plastic masterbatches, some existing technologies mix antibacterial agents in plastic masterbatches.

[0003] The invention patent with patent application number CN201811059580.6 discloses a nano-silver antibacterial agent and an antibacterial plastic containing the nano-silver antibacterial agent. In the patent, citric acid is used as a protective agent, sodium alkylbenzene sulfonate is used as a penetrant, and nano-silver is used as an antibacterial substance to prepare a nano-silver antibacterial agent. Although the addition of the protective agent and the penetrant makes the nano-silver more compatible with the plastic, the technical problem that the nano-silver is easily precipitated in the plastic during use is still not solved. In addition, the synthesis process of the antibacterial agent of the technical solution is complicated and the cost is high, which is not conducive to mass production.

[0004] The invention patent with patent application number CN201811002266.4 discloses an antibacterial masterbatch and a preparation method thereof. In this patent, the antibacterial properties of the polycarbonate masterbatch are improved by adding nano zinc oxide. Because nano zinc oxide is an inorganic nanoparticle, it has poor compatibility with polycarbonate and cannot be evenly dispersed in polycarbonate. In addition, as time goes by, nano zinc oxide is easily precipitated in polycarbonate, resulting in the antibacterial effect of polycarbonate not being lasting.

[0005] The invention patent with patent application number CN201410130733.7 discloses an antibacterial masterbatch, a nano antibacterial super-tough plastic adding the antibacterial masterbatch, and preparation and application thereof. The antibacterial agent used in the patent is a quaternary ammonium salt. The patent uses a silane coupling agent, a quaternary ammonium salt and a resin to be mixed evenly at a high speed, and finally extrudes and granulates in a twin-screw extruder to obtain the antibacterial masterbatch. The quaternary ammonium salt is treated with a silane coupling agent to make the quaternary ammonium salt and the resin better compatible, but the antibacterial effect of the quaternary ammonium salt is not obvious, and there is a physical force between the quaternary ammonium salt and the silane coupling agent, so that the quaternary ammonium salt cannot be left in the resin for a long time. After a period of time, the quaternary ammonium salt is easy to precipitate, which will reduce the antibacterial effect of the masterbatch and reduce the mechanical strength of the masterbatch.

[0006] The paper entitled "Preparation and Properties of PHMG Chemically Bonded Modified Antibacterial Polyurethane Soft Foam" discloses an antibacterial material modified by chemical bonding. In this study, the researchers added a certain mass of PHMG polyether triol, polyether polyol, BDMAEE, TEDA, silicone foaming agent and diethanolamine to chemically bond PHMG with isocyanate, so that PHMG is bonded to isocyanate, which can make the polyurethane produce a long-lasting antibacterial effect and prevent the precipitation of antibacterial agents. However, this method is relatively complicated in operation and has high costs in the actual production process, which does not meet market demand.

[0007] In order to solve the technical problem that inorganic antibacterial materials are easily precipitated on the surface of materials, there is a method of connecting antibacterial agents to plastic substrates through chemical bonding in the prior art. Existing researchers use boron trifluoride ether as a catalyst to react epichlorohydrin with antibacterial agents, bond highly reactive epoxy groups to the antibacterial agents, and then react the epoxy groups with the plastic substrate to chemically connect the compound with the antibacterial agent to the plastic substrate, so that the plastic achieves a long-term antibacterial effect. However, the whole process requires the use of highly toxic epichlorohydrin, highly corrosive boron trifluoride ether and highly toxic organic solvents. The whole operation process is relatively dangerous and does not conform to the green and environmentally friendly production concept. In addition, the cost of the produced plastic masterbatch is high, and the mid- and downstream application markets cannot accept it well. Summary of the invention

[0008] In order to solve the above technical problems, the first aspect of the present invention provides a concentrated long-lasting antibacterial and antifouling polyolefin masterbatch, whose raw materials include 20-80 parts of polyolefin, 1-10 parts of compatibilizer and 1-20 parts of antibacterial agent by weight, and the antibacterial agent contains amino group.

[0009] Preferably, the polyolefin is selected from at least one of polyethylene, polypropylene, polybutene, polypentene, polyhexene and polyoctene.

[0010] Preferably, the raw materials for preparing the antibacterial agent include 30-85 parts of cationic polymer, 30-80 parts of compatibilizer and 30-85 parts of organic amine in parts by weight.

[0011] Preferably, the cationic polymer is a guanidine salt.

[0012] Preferably, the guanidine salt is polyhexamethylene biguanide hydrochloride.

[0013] Preferably, the compatibilizer is selected from at least one of ethylene-maleic anhydride copolymer, propylene-maleic anhydride copolymer and isobutylene-maleic anhydride copolymer.

[0014] Preferably, the compatibilizer is selected from at least one of styrene-maleic anhydride copolymer, acrylic acid-maleic anhydride copolymer, acrylate-maleic anhydride copolymer, octadecyl vinyl ether-maleic anhydride copolymer and methyl vinyl ether-maleic anhydride copolymer, ethylene-vinyl acetate-maleic anhydride copolymer, styrene-N-phenylmaleimide-maleic anhydride copolymer, acrylamide-sodium allyl sulfonate-maleic anhydride copolymer, ethylene-acrylate-maleic anhydride copolymer, styrene-acrylate-maleic anhydride copolymer and ethylene-vinyl acetate-maleic anhydride copolymer.

[0015] Preferably, the organic amine is a long-chain amine having more than 10 carbon atoms.

[0016] Preferably, the long-chain amine is selected from at least one of 1-aminoundecane, dodecylamine, hexadecylamine, tridecylamine, tetradecylamine, pentadecylamine, hexadecylamine, heptadecylamine and octadecylamine.

[0017] The second aspect of the present invention provides a method for preparing the concentrated long-lasting antibacterial and antifouling polyolefin masterbatch, which comprises at least the following steps:

[0018] (1) adding a compatibilizer, a cationic polymer and an organic amine into a reaction kettle under a nitrogen atmosphere and stirring to obtain a substance A;

[0019] (2) Add polyolefin, compatibilizer and substance A into an internal mixer for internal mixing, and then mix and extrude into granules through a twin-screw extruder to obtain the obtained product.

[0020] Beneficial effects: In this technical solution, the inventors react maleic anhydride copolymer with polyhexamethylene biguanide hydrochloride to produce chemical bonding between polyhexamethylene biguanide hydrochloride and maleic anhydride copolymer, thereby improving the compatibility of polyhexamethylene biguanide hydrochloride with polyolefins. The inventors found that the chemically bonded polyhexamethylene biguanide hydrochloride would not precipitate on the surface of polyolefins, nor would it separate from polyolefins. The inventors unexpectedly found that by adding organic amines, chemical bonding between organic amines and maleic anhydride copolymers could further improve the compatibility and mechanical properties of the overall material. This technical solution does not use any organic solvents, does not generate waste gas emissions, does not pollute the environment, and is in line with the production concept of green chemistry. In addition, this technical solution is simple to operate, and the polyolefin masterbatch produced can be long-lastingly antibacterial and antifouling, and the cost is low, which can be easily accepted by mid- and downstream manufacturers. DETAILED DESCRIPTION

[0021] For the purpose of the following detailed description, it should be understood that the present invention may adopt various alternative changes and step sequences, unless expressly specified to the contrary. In addition, except in any operating examples, or otherwise indicated, all numbers representing the amount of ingredients used in the specification and claims should be understood to be modified by the term "about" in all cases. Therefore, unless otherwise indicated, the numerical parameters set forth in the following specification and the attached claims are approximate values ​​that vary according to the desired performance to be obtained by the present invention. At least it is not intended to limit the application of the doctrine of equivalents to the scope of the claims, and each numerical parameter should at least be interpreted according to the number of reported significant figures and by applying ordinary rounding techniques.

[0022] Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values ​​set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

[0023] When a numerical range is disclosed herein, the above range is deemed to be continuous and includes the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all sub-ranges included therein. For example, a specified range from "1 to 10" should be deemed to include any and all sub-ranges between a minimum of 1 and a maximum of 10. Exemplary sub-ranges of ranges 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, etc.

[0024] In order to solve the above technical problems, the first aspect of the present invention provides a concentrated long-lasting antibacterial and antifouling polyolefin masterbatch, whose raw materials include 20-80 parts of polyolefin, 1-10 parts of compatibilizer and 1-20 parts of antibacterial agent by weight, and the antibacterial agent contains amino group.

[0025] As a preferred technical solution, the polyolefin is selected from at least one of polyethylene, polypropylene, polybutene, polypentene, polyhexene and polyoctene.

[0026] As a preferred technical solution, the polyolefin is a mixture of polyethylene and polypropylene, and the mass ratio of the polyethylene to the polypropylene is 1:1.

[0027] As a preferred technical solution, the raw materials for preparing the antibacterial agent include 30-85 parts of cationic polymer, 30-80 parts of compatibilizer and 30-85 parts of organic amine in parts by weight.

[0028] As a preferred technical solution, the cationic polymer is a guanidine salt.

[0029] As a preferred technical solution, the guanidine salt is polyhexamethylene biguanide hydrochloride.

[0030] Polyhexamethylene biguanide hydrochloride is the best antibacterial agent in the cationic bactericide. It is in the shape of a white amorphous powder, has no special smell, is not easy to volatilize, has a rapid and mild bactericidal effect, is safe and non-toxic to the human body, and has no corrosive effect on the surface of various substances. The light and heat stability of polyhexamethylene biguanide hydrochloride is also better, easy to preserve, and will not make bacteria produce drug resistance during the sterilization process. It is durable and effective, and also has a certain mildew-proof effect. The inventor found that polyhexamethylene biguanide hydrochloride is introduced into high molecular polymer, which can make high molecular polymer have strong antibacterial properties. But polyhexamethylene biguanide hydrochloride has strong polarity, poor compatibility with most high molecular polymer matrices, can not be well dispersed in the high molecular polymer matrix, and is easy to separate from the high molecular polymer matrix over a long time.

[0031] As a preferred technical solution, the compatibilizer is selected from at least one of ethylene-maleic anhydride copolymer, propylene-maleic anhydride copolymer and isobutylene-maleic anhydride copolymer.

[0032] The inventors found that adding a certain amount of a compatibilizer can improve the compatibility of polyhexamethylene biguanide hydrochloride in polyolefins. The inventors believe that the compatibilizer may contain non-polar groups that are highly compatible with polyolefins and polar groups that are highly compatible with polyhexamethylene biguanide hydrochloride, so the compatibility of the overall material can be improved. Although the compatibility of polyhexamethylene biguanide hydrochloride is improved in the overall material, the inventors found that polyhexamethylene biguanide hydrochloride is easily precipitated on the surface of the material.

[0033] As a preferred technical solution, the compatibilizer is selected from at least one of styrene-maleic anhydride copolymer, acrylic acid-maleic anhydride copolymer, acrylate-maleic anhydride copolymer, octadecyl vinyl ether-maleic anhydride copolymer and methyl vinyl ether-maleic anhydride copolymer, ethylene-vinyl acetate-maleic anhydride copolymer, styrene-N-phenylmaleimide-maleic anhydride copolymer, acrylamide-sodium allyl sulfonate-maleic anhydride copolymer, ethylene-acrylate-maleic anhydride copolymer, styrene-acrylate-maleic anhydride copolymer and ethylene-vinyl acetate-maleic anhydride copolymer.

[0034] Compatibilizer refers to an auxiliary agent that promotes the combination of two incompatible polymers by means of intermolecular bonding forces, thereby obtaining a stable blend. Maleic anhydride copolymer is a polymer obtained by grafting maleic anhydride as a monomer with other olefin materials. Since maleic anhydride copolymer has both polar groups provided by maleic anhydride and non-polar segments of olefins, it can improve the compatibility of two polymers with different polarities. The anhydride groups in styrene-maleic anhydride copolymer can chemically bond with polyhexamethylene biguanide hydrochloride to form a new polymer B. The new polymer B not only has good compatibility with polyolefins, but can also be well dispersed in polyolefins. In addition, due to the introduction of polyhexamethylene biguanide hydrochloride, the new polymer B has a good antibacterial effect. Since polyhexamethylene biguanide hydrochloride and styrene-maleic anhydride copolymer are connected together by chemical bonding, as time goes by, polyhexamethylene biguanide hydrochloride will not precipitate on the surface of the overall material, nor will it be separated from the polyolefin, and can achieve a good long-term antibacterial and anti-fouling effect.

[0035] As a preferred technical solution, the organic amine is a long-chain amine with more than 10 carbon atoms.

[0036] As a preferred technical solution, the long-chain amine is selected from at least one of 1-aminoundecane, dodecylamine, hexadecylamine, tridecylamine, tetradecylamine, pentadecylamine, hexadecylamine, heptadecylamine and octadecylamine.

[0037] As a preferred technical solution, the long-chain amine is dodecylamine.

[0038] The inventors found that adding long-chain organic amines to maleic anhydride copolymers and polyhexamethylene biguanide hydrochloride can further improve the compatibility between the antibacterial agent and the polyolefin. The long-chain organic amine can chemically bond with the maleic anhydride copolymer, so that the organic amine is firmly connected to the maleic anhydride copolymer. The longer carbon chain in the organic amine can improve the compatibility between the antibacterial agent and the polyolefin, and can also improve the mechanical strength and toughness of the overall material.

[0039] The second aspect of the present invention provides a method for preparing a concentrated long-lasting antibacterial and antifouling polyolefin masterbatch, comprising at least the following steps:

[0040] (1) adding a compatibilizer and a cationic polymer to an internal mixer at 300-350° C. and stirring, maintaining a nitrogen atmosphere in the internal mixer, reacting for 1-8 hours, then adding an organic amine and stirring, and reacting for 1-8 hours, maintaining a nitrogen atmosphere in the internal mixer, to obtain substance A;

[0041] (2) Add polyolefin, compatibilizer and substance A into an internal mixer at 270-350° C., mix and stir for 1-8 hours, and then mix and extrude into granules through a screw extruder to obtain the product.

[0042] In addition, unless otherwise stated, all raw materials used were commercially available.

[0043] Example

[0044] Example 1

[0045] The first aspect of this embodiment provides a concentrated, long-lasting antibacterial and antifouling polyolefin masterbatch, whose raw materials include 20 parts of polyolefin, 1 part of compatibilizer and 3 parts of antibacterial agent by weight. The polyolefin is polyethylene, and the polyethylene is purchased from Suzhou Guifei Engineering Plastics Co., Ltd., item number: DMDA-8008. The compatibilizer is ethylene-maleic anhydride copolymer, and the ethylene-maleic anhydride copolymer is purchased from Jinheng Plastics, item number: Jinheng 9901.

[0046] The raw materials for preparing the antibacterial agent include 30 parts of cationic polymer, 30 parts of compatibilizer and 35 parts of organic amine by weight. The cationic polymer is guanidine salt, and the guanidine salt is polyhexamethylene biguanide hydrochloride. The polyhexamethylene biguanide hydrochloride is purchased from Shanghai Dejian Chemical Co., Ltd., item number: 0050.

[0047] The compatibilizer is styrene-maleic anhydride copolymer, which is purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd., CAS No.: 31959-78-1.

[0048] The organic amine is dodecylamine, which is purchased from Hubei Xinghengye Technology Co., Ltd. with the item number 124-22-1.

[0049] A second aspect of the present embodiment provides a method for preparing a concentrated long-lasting antibacterial and antifouling polyolefin masterbatch, comprising the following steps:

[0050] (1) Add styrene-maleic anhydride copolymer and polyhexamethylene biguanide hydrochloride into an internal mixer at 310° C. and stir, while maintaining a nitrogen atmosphere in the internal mixer. After reacting for 3 hours, add an organic amine and stir, and react for 3 hours. While maintaining a nitrogen atmosphere in the internal mixer, obtain substance A;

[0051] (2) At 220° C., polyethylene, ethylene-maleic anhydride copolymer and substance A are added into an internal mixer for internal mixing and stirring for 3 hours, and then blended and extruded into granules through a screw extruder to obtain.

[0052] Example 2

[0053] The first aspect of this embodiment provides a concentrated, long-lasting antibacterial and antifouling polyolefin masterbatch, whose raw materials include 60 parts of polyethylene, 3 parts of a compatibilizer and 9 parts of an antibacterial agent, by weight. The polyolefin is polyethylene, and the polyethylene is purchased from Suzhou Guifei Engineering Plastics Co., Ltd., with the item number DMDA-8008. The compatibilizer is an ethylene-maleic anhydride copolymer, and the ethylene-maleic anhydride copolymer is purchased from Jinheng Plastics, with the item number Jinheng 9901.

[0054] The raw materials for preparing the antibacterial agent include 60 parts of cationic polymer, 60 parts of compatibilizer and 65 parts of organic amine by weight. The cationic polymer is guanidine salt, and the guanidine salt is polyhexamethylene biguanide hydrochloride. The polyhexamethylene biguanide hydrochloride is purchased from Shanghai Dejian Chemical Co., Ltd., item number: 0050.

[0055] The compatibilizer is styrene-maleic anhydride copolymer, which is purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd., CAS No.: 31959-78-1.

[0056] The organic amine is dodecylamine, which is purchased from Hubei Xinghengye Technology Co., Ltd. with the item number 124-22-1.

[0057] A second aspect of the present embodiment provides a method for preparing a concentrated long-lasting antibacterial and antifouling polyolefin masterbatch, comprising the following steps:

[0058] (1) Add styrene-maleic anhydride copolymer and polyhexamethylene biguanide hydrochloride into an internal mixer at 310° C. and stir, while maintaining a nitrogen atmosphere in the internal mixer. After reacting for 3 hours, add an organic amine and stir, and react for 3 hours. While maintaining a nitrogen atmosphere in the internal mixer, obtain substance A;

[0059] (2) At 220° C., polyethylene, ethylene-maleic anhydride copolymer and substance A are added into an internal mixer for internal mixing and stirring for 3 hours, and then blended and extruded into granules through a screw extruder to obtain.

[0060] Example 3

[0061] The first aspect of this embodiment provides a concentrated, long-lasting antibacterial and antifouling polyolefin masterbatch, whose raw materials include 60 parts of polypropylene, 3 parts of a compatibilizer and 9 parts of an antibacterial agent, by weight. The polyolefin is polypropylene, which is purchased from Shanghai Haiyu Chemical Co., Ltd. with the item number T30S. The compatibilizer is propylene-maleic anhydride copolymer, which is purchased from Shenzhen Hai'an Plastic Chemical Co., Ltd. with the item number 332K.

[0062] The raw materials for preparing the antibacterial agent include 60 parts of cationic polymer, 60 parts of compatibilizer and 65 parts of organic amine by weight. The cationic polymer is guanidine salt, and the guanidine salt is polyhexamethylene biguanide hydrochloride. The polyhexamethylene biguanide hydrochloride is purchased from Shanghai Dejian Chemical Co., Ltd., item number: 0050.

[0063] The compatibilizer is styrene-maleic anhydride copolymer, which is purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd., CAS No.: 31959-78-1.

[0064] The organic amine is dodecylamine, which is purchased from Hubei Xinghengye Technology Co., Ltd. with the item number 124-22-1.

[0065] A second aspect of the present embodiment provides a method for preparing a concentrated long-lasting antibacterial and antifouling polyolefin masterbatch, comprising the following steps:

[0066] (1) Add styrene-maleic anhydride copolymer and polyhexamethylene biguanide hydrochloride into an internal mixer at 310° C. and stir, while maintaining a nitrogen atmosphere in the internal mixer. After reacting for 3 hours, add an organic amine and stir, and react for 3 hours. While maintaining a nitrogen atmosphere in the internal mixer, obtain substance A;

[0067] (2) At 220° C., polypropylene, propylene-maleic anhydride copolymer and substance A are added into an internal mixer for internal mixing and stirring for 3 hours, and then blended and extruded into granules through a screw extruder to obtain.

[0068] Comparative Example 1

[0069] The difference between this comparative example and Example 2 is that the antibacterial agent in this comparative example is 9 parts of dodecyl dimethyl benzyl ammonium chloride, which is purchased from Shandong Nuohui Chemical Co., Ltd., with the item number 15. The polyolefin is 30 parts of polyethylene, the compatibilizer is 3 parts of ethylene-maleic anhydride copolymer, which is purchased from Jinheng Plastics, with the item number Jinheng 9901, and the polyethylene is purchased from Suzhou Guifei Engineering Plastics Co., Ltd., with the item number DMDA-8008.

[0070] The preparation method of the concentrated long-lasting antibacterial and antifouling polyolefin masterbatch in this comparative example comprises the following steps: adding polyethylene, ethylene-maleic anhydride copolymer and polyhexamethylene biguanide hydrochloride into an internal mixer at 310°C for internal mixing and stirring for 3 hours, and then blending and extruding the masterbatch through a screw extruder to obtain the masterbatch.

[0071] Comparative Example 2

[0072] The difference between this comparative example and Example 2 is that this comparative example does not contain organic amine, and the rest is the same as Example 1.

[0073] Comparative Example 3

[0074] The difference between this comparative example and Example 2 is that this comparative example does not contain the compatibilizer ethylene-maleic anhydride copolymer.

[0075] Performance Testing

[0076] Performance Test 1

[0077] With reference to GB 21551.2-2010, the antibacterial properties of the masterbatches obtained in Examples 1-4 and Comparative Examples 1-3 against Escherichia coli, Staphylococcus aureus and Candida albicans were tested for an action time of 24 hours, and the antibacterial rates were calculated.

[0078] Performance Test 2

[0079] After the master batches obtained in Examples 1-4 and Comparative Examples 1-3 were placed for 100 days, the antibacterial performance against Escherichia coli was tested with reference to GB 21551.2-2010, the action time was 24 hours, and the antibacterial rate was calculated.

[0080] Performance Test 3

[0081] 10 samples were respectively injection molded with the masterbatches obtained in Examples 1-4 and Comparative Examples 1-3, and placed in an oven at 35°C for 100 hours. The sample surfaces were then observed to see if they became mottled, and the material's anti-migration property was evaluated. The material's discoloration was observed to see if it changed color, and its stability was evaluated. The samples with 0-1 mottled and anti-migration properties had excellent mottled and anti-migration properties, with 2-5 mottled and anti-migration properties having good mottled and anti-migration properties, with 6-10 mottled and anti-migration properties having poor mottled and anti-migration properties. The samples with 0-1 mottled and anti-migration properties had excellent color change stability, with 2-5 mottled and anti-migration properties having good mottled and anti-migration properties, and with 6-10 mottled and anti-migration properties having poor color change stability.

[0082]

[0083] The above is only a preferred embodiment of the present invention and is not intended to limit the invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A concentrated long-lasting antibacterial and antifouling polyolefin masterbatch, characterized in that: The raw materials include 60 parts of polypropylene, 3 parts of a compatibilizer and 9 parts of an antibacterial agent by weight, wherein the compatibilizer is a propylene-maleic anhydride copolymer; The raw materials for preparing the antibacterial agent include 60 parts of a cationic polymer, 60 parts of a compatibilizer and 65 parts of an organic amine by weight, wherein the cationic polymer is a guanidine salt, and the guanidine salt is polyhexamethylene biguanide hydrochloride; The compatibilizer is styrene-maleic anhydride copolymer; The organic amine is dodecylamine.

2. A method for preparing concentrated long-lasting antibacterial and antifouling polyolefin masterbatch according to claim 1, characterized in that: At least the following steps are included: (1) Adding a compatibilizer, a cationic polymer and an organic amine into a reactor under a nitrogen atmosphere and stirring the mixture to obtain a substance A; (2) Add polyolefin, compatibilizer and substance A into an internal mixer for internal mixing, and then mix and extrude into granules through a twin-screw extruder to obtain the product.

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