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A kind of core-shell type long-acting antibacterial emulsion and preparation method thereof
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An antibacterial emulsion, core-shell type technology, applied in the field of emulsion containing guanidinium salt and its preparation, can solve the problems of pollution, antibacterial effect not lasting, etc., achieve lower film forming temperature, simple preparation process, and lower storage stability Effect
Active Publication Date: 2017-08-04
GUANGXI UNIV
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[0008] The purpose of the present invention is to provide a core-shell type long-acting antibacterial emulsion and its preparation method, so as to overcome the shortcomings of polluting other products and not lasting antibacterial effect due to the loss of antibacterial agent
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Embodiment 1
[0033] Preparation of polyhexamethyleneguanidine hydrochloride macromonomer (GPHMG):
[0034] Weigh 40 g of polyhexamethylene guanidine hydrochloride with a molecular weight of 500 and dissolve in 60 g of deionized water to prepare a guanidine solution with a mass fraction of 40%; blow nitrogen, and slowly drop 11.3 g of GMA into the guanidine solution. Under the protection of nitrogen, the reaction was stirred at room temperature for 24 hours until the oil phase disappeared completely, and it was prepared.
Embodiment 2
[0036] Preparation of polyhexamethyleneguanidine hydrochloride macromonomer (GPHMG):
[0037] Weigh 30 g of polyhexamethylene guanidine hydrochloride with a molecular weight of 700 and dissolve in 70 g of distilled water to prepare a 30% guanidine solution; ventilate argon, slowly drop 6.7 g of GMA into the guanidine solution, and continue to Under the protection of argon, the reaction was stirred at room temperature for 18 hours until the oil phase disappeared completely, and it was prepared.
Embodiment 3
[0039] Preparation of polyhexamethylene biguanide hydrochloride macromonomer (GPHMB):
[0040] Weigh 25g of polyhexamethylene biguanide hydrochloride with a molecular weight of 800 and dissolve it in 75g of purified water to prepare a 25% guanidine solution; ventilate with helium, slowly drop 5.1g of GMA into the guanidine solution, and continue to Under the protection of helium, the reaction was stirred at room temperature for 16 hours until the oil phase disappeared completely.
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Abstract
A core-shell type long-acting antibacterial emulsion, the component raw materials are water, n-butyl acrylate, isobutyl acrylate, isooctyl acrylate, styrene, methyl methacrylate, vinyl acetate, guanidinium oligomer Monomer, emulsifier, initiator, crosslinker, sodium bicarbonate. The preparation method steps are as follows: take the raw materials of each component; add water, emulsifier, isooctyl acrylate, etc. into the reactor, stir and heat up to 60-70°C, add an initiator to initiate the reaction, after the emulsion turns blue, keep it warm for 60-70°C After 120 minutes, the core layer emulsion is obtained; keep the temperature at 70-80°C, add n-butyl acrylate, etc., raise the temperature to 81-85°C, keep warm, cool, and discharge to obtain the product. The invention adopts guanidine salt and biguanide salt oligomer as the antibacterial functional group, and the guanidine group is the main antimicrobial group, which has obvious antibacterial effect and is very safe to human body. The invention is simple, easy to operate, environment-friendly and suitable for the preparation of industrial production of long-acting antibacterial emulsion.
Description
Technical field [0001] The invention relates to a guanidine salt-containing emulsion and a preparation method thereof, in particular to a core-shell type long-acting antibacterial emulsion and a preparation method thereof. Background technique [0002] Coatings and paints are indispensable materials for furniture production and home decoration in daily life. Ordinary paints and emulsions used in paints are oily emulsions that are waterproof and stain resistant, but not environmentally friendly; water-based emulsions are environmentally friendly, but waterproof The aging resistance is poor, and the most important thing is that neither of them have antibacterial effects. In view of this situation, the introduction of special functional groups can achieve multiple effects, such as the introduction of guanidine salts to impart antibacterial effects to the emulsion, while also having environmental protection and waterproof properties. [0003] Antibacterial agents can be divided into i...
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