Long-acting antibacterial polystyrene resin and preparation method thereof

A polystyrene resin and polystyrene technology, which is applied in the field of long-acting antibacterial polystyrene resin and its preparation, can solve the problems of the influence of antibacterial properties of polyolefin materials, difficult to uniformly mix and disperse, etc., so as to improve the long-term antibacterial properties, Improves dispersibility and reduces excess evaporation

Active Publication Date: 2022-01-07
USEON NANJING EXTRUSION MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned related technologies, the inventors believe that whether it is through melt grafting or solution grafting, during the modification reaction process, polar polyamines and guanidinium oligomers and hydrophobic polyolefins are large It is difficult to mix and disperse the molecular chains uniformly, and some polyamines and guanidinium oligomers will exist in the prepared polyolefin material in free form. negatively affect the antimicrobial properties of

Method used

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  • Long-acting antibacterial polystyrene resin and preparation method thereof
  • Long-acting antibacterial polystyrene resin and preparation method thereof
  • Long-acting antibacterial polystyrene resin and preparation method thereof

Examples

Experimental program
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preparation example 1

[0045] This preparation example provides a polyamine and guanidinium oligomer, which is prepared according to the following steps:

[0046] Add 1394.4 grams of hexamethylenediamine and 955.3 grams of guanidine hydrochloride into the reaction kettle, stir and raise the temperature to 120°C, react for 2 hours, then gradually raise the temperature to 170°C and continue the reaction for 1.5 hours to obtain polyamine and guanidinium oligomer.

preparation example 2

[0048] This preparation example provides a polyamine and guanidinium oligomer, which is prepared according to the following steps:

[0049] Take 1394.4 g of hexamethylenediamine, add it to the reaction kettle, add deionized water to make a 40%wt aqueous solution, add hydrochloric acid dropwise to make the pH of the solution = 3, and then distill off the water under reduced pressure. Add 840.8 g of dicyandiamide to the solution, stir and heat up to 110°C under nitrogen protection, react for 2 hours, and then heat up to 170°C for 1 hour to prepare polyamine and guanidinium oligomer.

preparation example 3

[0052] This preparation example provides a kind of initiator, prepares according to the following steps:

[0053] Add 3000g of azobisisobutyronitrile and 7000g of 1,4-bis(tert-butylperoxyisopropyl)benzene into the reaction kettle, stir evenly to obtain an initiator.

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Abstract

The invention discloses a long-acting antibacterial polystyrene resin and a preparation method thereof, and relates to the technical field of styrene polymerization. The long-acting antibacterial polystyrene resin comprises the following components in percentage by weight: 40-90% of a styrene monomer, 5-50% of polystyrene, 0.1-20% of an initiator, 1-40% of polyamine and guanidine salt oligomer, and 0.1-30% of an active comonomer. The preparation method of the polystyrene resin comprises the following steps: a prepolymerization stage: mixing a styrene monomer, polystyrene and an active comonomer to obtain a mixture, stirring and dispersing polyamine and a guanidine salt oligomer in the mixture, carrying out an end-capping reaction at 90-140 DEG C to obtain a reaction body, mixing an initiator with the reaction body, and carrying out prepolymerization reaction at 140-170 DEG C to obtain a prepolymer; and a polymerization stage: carrying out polymerization reaction on the prepolymer at 20-250 DEG C to obtain the long-acting antibacterial polystyrene resin. According to the invention, the dispersibility of the polyamine and guanidine salt oligomer is improved, so that the long-acting antibacterial performance of the polystyrene material is improved.

Description

technical field [0001] The invention relates to the technical field of styrene polymerization, in particular to a long-acting antibacterial polystyrene resin and a preparation method thereof. Background technique [0002] Polystyrene can be made into pre-expanded beads or foamed boards through foaming. Foamed boards have good thermal insulation and mechanical properties and are widely used in building exterior wall insulation. Especially in the relatively cold North America, the use of foamed panels is the standard choice when building residential houses. However, after long-term use, the foamed board often has the problem of mold on the surface, especially when the foamed board is used in a damp basement, the moldy situation often occurs. [0003] In order to reduce the mildew of foamed boards, the method of adding silver ions to polystyrene is generally used to prepare antibacterial polystyrene boards. However, the silver ions in the polystyrene sheet will gradually lose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F212/08C08F222/38C08F220/60C08F220/36C08F226/02C08F4/04C08F4/36
CPCC08F257/02C08F4/04C08F4/36C08F212/08C08F222/385C08F220/60C08F220/36C08F226/02
Inventor 李书召陈志强
Owner USEON NANJING EXTRUSION MACHINERY CO LTD
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