Antibacterial polyurethane bonding material and preparation method thereof

Abstract

The invention belongs to the technical field of antibacterial polyurethane bonding materials, and discloses an antibacterial polyurethane bonding material which comprises the following components: 90 parts of polyether polyol, 1.5-2.5 parts of an antibacterial agent, 0.3-0.5 part of a catalyst, 2-4 parts of a surfactant, 3-5 parts of a foaming agent, 40-50 parts of isocyanate, 1-2 parts of a release agent and 4-5 parts of quaternary ammonium salt. The weather resistance and the thermodynamic property of the polyurethane coating adhesive are improved, so that the stability of an adhesive film is improved, the crosslinking degree of a system can be increased, the firmness and the mechanical property of a polyurethane coating are improved, the further halogenation process is simple and convenient, meanwhile, the purposes of long-term antibacterial property and renewable antibacterial property are achieved through the polyurethane prepolymer, the synthesis process is relatively simple, and the production cost is low. The antibacterial rate of the coating adhesive can reach 99.9%, and the nitrogen halamine has small toxicity to cells, is lasting in antibacterial effect and can be repeatedly chlorinated and regenerated, so that the coating adhesive has good use value.

Description

Technical Field

[0001] The present invention belongs to the technical field of antibacterial polyurethane adhesive materials, and particularly relates to an antibacterial polyurethane adhesive material and a preparation method thereof. Background Art

[0002] In recent years, due to the characteristics of porosity, low relative density, and high specific strength, polyurethane foam materials have become the largest consumption variety in polyurethane products and are widely used in fields such as flame retardancy, heat insulation, and sound absorption and noise reduction. The porous holes in ordinary polyurethane foam materials have strong hygroscopicity and are easily attached by bacteria. Not only does the material itself not have antibacterial properties, but additives such as the main chain, plasticizer, stabilizer, and colorant of the material will become the carbon source for microbial growth. Under certain temperature and humidity conditions, polyurethane foam materials are extremely likely to become a hotbed for bacterial growth. The antibacterial functionalization of polyurethane foam materials is of great significance, and its related research has become a key area of concern.

[0003] With the continuous in-depth research, different antibacterial substances have been synthesized and introduced into polymer materials through different methods to achieve a certain antibacterial effect. Among many potential antibacterial substances, nitrogen halamine compounds are ideal materials for preparing antibacterial materials due to their inherent economic advantages, long-term stability, high durability, renewable nature, and non-toxicity to humans and the environment.

[0004] Most of the reported preparation methods are uneconomical, and the products show non-persistent, unstable, and inefficient activities, as well as other problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an antibacterial polyurethane adhesive material and a preparation method thereof to solve the technical problems raised in the background art.

[0006] To achieve the above purpose, the specific technical solution of the present invention is as follows: An antibacterial polyurethane adhesive material, comprising the following components: 90 parts of polyether polyol, 1.5 - 2.5 parts of antibacterial agent, 0.3 - 0.5 parts of catalyst, 2 - 4 parts of surfactant, 3 - 5 parts of foaming agent, 40 - 50 parts of isocyanate, 1 - 2 parts of demolding agent, and 4 - 5 parts of quaternary ammonium salt.

[0007] Preferably, the components are as follows: 90 parts of polyether polyol, 1.5 parts of antibacterial agent, 0.3 parts of catalyst, 2 parts of surfactant, 3 parts of foaming agent, 40 parts of isocyanate, 1 part of demolding agent, and 4 parts of quaternary ammonium salt.

[0008] Preferably, the optimal components are as follows: 90 parts of polyether polyol, 2 parts of antibacterial agent, 0.4 parts of catalyst, 3 parts of surfactant, 4 parts of foaming agent, 45 parts of isocyanate, 1.5 parts of demolding agent, and 4.5 parts of quaternary ammonium salt.

[0009] Preferably, the components are as follows: 90 parts of polyether polyol, 2.5 parts of antibacterial agent, 0.5 part of catalyst, 4 parts of surfactant, 5 parts of foaming agent, 50 parts of isocyanate, 2 parts of demolding agent, and 5 parts of quaternary ammonium salt.

[0010] Preferably, for the antibacterial polyurethane adhesive material and its preparation method, it is characterized in that: the method comprises the following steps:

[0011] S1: First, vacuum dehydrate the polyether polyol;

[0012] S2: Then mix and stir polyether polyol, antibacterial agent, catalyst, surfactant, foaming agent, isocyanate, and quaternary ammonium salt to obtain a mixture;

[0013] S3: Prepare a molding mold and spray a demolding agent in the mold;

[0014] S4: Pour the mixture into the mold for foaming and naturally cool to obtain the finished product.

[0015] Preferably, in step S2, the stirring speed is 200 - 400 r / min, and the stirring time is 40 - 60 min.

[0016] The present invention has the following advantages:

[0017] 1. For the antibacterial polyurethane adhesive material and its preparation method, by improving the weather resistance and thermodynamic properties of the polyurethane coating adhesive, the stability of the adhesive film is increased, the crosslinking degree of the system can be increased, the firmness and mechanical properties of the polyurethane coating can be improved, and the further halogenation process is simple and convenient.

[0018] 2. For the antibacterial polyurethane adhesive material and its preparation method, by setting the polyurethane prepolymer, the purpose of long-term antibacterial and renewable antibacterial is achieved. The synthesis process is relatively simple, the antibacterial rate of the coating adhesive can reach 99.9%, the nitrogen halamine has little cytotoxicity to cells and has long-lasting antibacterial property, and can be repeatedly chlorinated and regenerated, so it has good application value. Specific Embodiments

[0019] Example 1

[0020] For the antibacterial polyurethane adhesive material and its preparation method of the present invention, it is characterized in that: the method comprises the following steps:

[0021] S1: First, vacuum dehydrate the polyether polyol;

[0022] S2: Then mix and stir 90 parts of polyether polyol, 1.5 parts of antibacterial agent, 0.3 part of catalyst, 2 parts of surfactant, 3 parts of foaming agent, 40 parts of isocyanate, and 4 parts of quaternary ammonium salt to obtain a mixture, with a stirring speed of 200 r / min and a stirring time of 40 min;

[0023] S3: Prepare the molding die and spray 1 part of mold release agent in the die.

[0024] S4: Pour the mixture into the die for foaming and let it cool naturally to obtain the finished product.

[0025] Example 2

[0026] An antibacterial polyurethane adhesive material and its preparation method according to the present invention, characterized in that: the method comprises the following steps:

[0027] S1: First, vacuum dehydrate the polyether polyol.

[0028] S2: Then mix and stir 90 parts of polyether polyol, 2 parts of antibacterial agent, 0.4 part of catalyst, 3 parts of surfactant, 4 parts of foaming agent, 45 parts of isocyanate and 4.5 parts of quaternary ammonium salt to obtain a mixture, with a stirring speed of 300 r / min and a stirring time of 50 min.

[0029] S3: Prepare the molding die and spray 1.5 parts of mold release agent in the die.

[0030] S4: Pour the mixture into the die for foaming and let it cool naturally to obtain the finished product.

[0031] Example 3

[0032] An antibacterial polyurethane adhesive material and its preparation method according to the present invention, characterized in that: the method comprises the following steps:

[0033] S1: First, vacuum dehydrate the polyether polyol.

[0034] S2: Then mix and stir 90 parts of polyether polyol, 2.5 parts of antibacterial agent, 0.5 part of catalyst, 4 parts of surfactant, 5 parts of foaming agent, 50 parts of isocyanate and 5 parts of quaternary ammonium salt to obtain a mixture, with a stirring speed of 200 r / min and a stirring time of 40 min.

[0035] S3: Prepare the molding die and spray 1 part of mold release agent in the die.

[0036] S4: Pour the mixture into the die for foaming and let it cool naturally to obtain the finished product.

[0037] Table 1: Performance detection

[0038]

[0039] As can be seen from the data in the table, the polyurethanes prepared from organosilicon quaternary ammonium salt chain extenders in Examples 1 - 3 of the present invention have excellent mechanical properties, strong toughness, and can still maintain good toughness in a high-temperature environment of 160 °C, indicating their excellent thermal stability.

[0040] Table 2: Antibacterial rate

[0041]

[0042]

[0043] As can be seen from the data in the table, the polyurethanes prepared from organosilicon quaternary ammonium chain extenders in Examples 1 - 3 of the present invention have an antibacterial rate as high as 99%, showing excellent antibacterial properties. It is speculated that the quaternary ammonium salt functional groups contained in the organosilicon quaternary ammonium salt chain extenders inactivate the bacteria.

[0044] It can be understood that the present invention is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. An antibacterial polyurethane bonding material, Characterized in that: It includes the following components: 90 parts of polyether polyol, 1.5 - 2.5 parts of antibacterial agent, 0.3 - 0.5 parts of catalyst, 2 - 4 parts of surfactant, 3 - 5 parts of foaming agent, 40 - 50 parts of isocyanate, 1 - 2 parts of demolding agent, and 4 - 5 parts of quaternary ammonium salt.

2. The antibacterial polyurethane bonding material according to claim 1, Characterized in that: The components are as follows: 90 parts of polyether polyol, 1.5 parts of antibacterial agent, 0.3 parts of catalyst, 2 parts of surfactant, 3 parts of foaming agent, 40 parts of isocyanate, 1 part of demolding agent, and 4 parts of quaternary ammonium salt.

3. The antibacterial polyurethane bonding material according to claim 1, Characterized in that: The optimal components are as follows: 90 parts of polyether polyol, 2 parts of antibacterial agent, 0.4 parts of catalyst, 3 parts of surfactant, 4 parts of foaming agent, 45 parts of isocyanate, 1.5 parts of demolding agent, and 4.5 parts of quaternary ammonium salt.

4. The antibacterial polyurethane bonding material according to claim 1, Characterized in that: The components are as follows: 90 parts of polyether polyol, 2.5 parts of antibacterial agent, 0.5 parts of catalyst, 4 parts of surfactant, 5 parts of foaming agent, 50 parts of isocyanate, 2 parts of demolding agent, and 5 parts of quaternary ammonium salt.

5. The antibacterial polyurethane bonding material and its preparation method according to any one of claims 1 - 4, Characterized in that: The method includes the following steps: S1: First, vacuum dehydrate the polyether polyol; S2: Then mix and stir the polyether polyol, antibacterial agent, catalyst, surfactant, foaming agent, isocyanate, and quaternary ammonium salt to obtain a mixture; S3: Prepare a molding mold and spray a demolding agent in the mold; S4: Pour the mixture into the mold to foam and naturally cool to obtain the finished product.

6. The preparation method of the bonding - type antibacterial polyurethane foaming material according to claim 4, Characterized in that: The stirring speed in step S2 is 200 - 400 r / min, and the stirring time is 40 - 60 min.

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