Preparation method of an energy-saving, environmentally friendly, stain resistant and durable antibacterial seam adhesive

　　With the development of society, various new building materials emerge in endlessly. Ceramic tiles have become one of the main types of floor and wall decoration materials in China, and their application range is also becoming increasingly wide. During the decoration process, in order to fill the gaps between the tiles, the joints are usually filled with seam sealant, so kitchens, bathrooms, and even commercial decoration lobbies will have seam sealant.

Currently, the joint fillers used to fill this gap include ordinary cement-based joint fillers, one-component acrylic based mastics, and reactive resin mastics. Ordinary cement based joint filler is made of white cement, heavy calcium carbonate, and redispersible adhesive powder. After using cement based joint filler for a period of time, it has poor stain resistance, is prone to be contaminated by dust and oil smoke, making it turn from white to black, easy to breed mold, and affect the household environment.
American sealant is an upgraded product of sealant, mainly composed of water-based polymer lotion and pigment, such as acrylic based American sealant. However, acrylic based suture adhesives have poor wear resistance, stain resistance, and aging resistance. Therefore, the antibacterial effect of existing sealants and joint fillers is not obvious, and it is unable to reduce indoor microbial pollution sources and harm to human body.
In response to the shortcomings of the existing technology, technicians provide an antibacterial seam adhesive that is convenient in construction, can inhibit bacteria for a long time, is mold resistant, and has a long service life. It is implemented using the following technical solutions: including the following parts by weight of substances: silver antibacterial agents are silver ion antibacterial agents and/or nano silver antibacterial agents. The light stabilizer is a light stabilizer 765 and/or a UV 292 light stabilizer. The plasticizers are diethyl decyl phthalate and/or diethyl decyl nonyl phthalate. The catalysts are chelated tin catalysts and/or dibutyltin dilaurate. Is antioxidant 1010 and/or antioxidant 1076. The pigment is gold powder.
The preparation method of the antibacterial sewing adhesive comprises the following steps: 1. drying the raw material for standby; 2. Mix and stir the polyurethane, light stabilizer, plasticizer, antioxidant, and pigment dried in step 1 in proportion, add a formula amount of heavy calcium and active nano calcium, continue stirring, add a formula amount of hydrophobic vapor phase silicon dioxide and hydrophobic vapor phase silicon dioxide in batches, vacuum dehydration and degassing, and then continue stirring to obtain the mixture; 3. Adding nano titanium dioxide and silver antibacterial agent to the mixture in step 2 for vacuum defoaming, stirring at low speed, and cooling; 4. Add a prescribed amount of catalyst to the mixture after defoaming in Step 3, maintain vacuum pressure, and stir evenly to obtain the mixture.
Compared with the prior art, the beneficial effects of this new type of seam adhesive are: using silver antibacterial agents, it is not easy to produce drug-resistant bacteria; At the same time, the invention has the properties of anti ultraviolet, anti-bacterial, self-cleaning and anti-aging in combination with nano titanium dioxide; The combination of silver antibacterial agent and nano titanium dioxide has a long-lasting antibacterial effect. Only a small amount of silver antibacterial agent needs to be added to achieve a good antibacterial effect, which is energy-saving and environmentally friendly.
In addition, this product has a wide range of applications, and can be widely used in the gaps of various building materials. It is resistant to scrubbing, abrasion, hardness, water resistance, and not easy to fall off. It has bright colors, high adhesive strength, durability, and is green and environmentally friendly.