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The acrylic pressure-sensitive adhesive has the unique function of long-lasting antibacterial and expands its application in the field of medicine and health.

Pressure-sensitive adhesive is a viscoelastic body, only mild pressure can stick to the driest surface and part of the wet surface, and when torn off the adhesive is not easy to remain on the surface. Due to the advantages of convenient use, good stability, and easy preparation, the pressure-sensitive adhesive has been widely used in the medical and health fields such as surgical dressing, skin wound treatment, adhesive biomedical devices, transdermal drug release patches, medical labels, and tapes.

Acrylate is the main material for the synthesis of medical pressure-sensitive adhesive, which has two advantages:

1. The preparation of acrylate pressure-sensitive adhesive does not need to add additional components, through emulsion or solution polymerization and can be used directly, without separation and purification, so it has a great cost advantage, and avoid potential safety problems;

2. Adjusting the content and type of acrylic monomer can get different properties of pressure-sensitive adhesive, so it has advantages in product diversity and flexibility. Since the pressure-sensitive adhesive is often used for covering the protection of skin wounds, it is necessary to give it antibacterial properties, which can prevent wound infection and facilitate wound healing.

Iodine is a common medical fungicide, usually used in iodine or iodophor solution. Iodophor granules dissolved in solvent acrylic pressure sensitive adhesive can be prepared to contain iodine pressure sensitive adhesive and has been prepared into iodophor surgical towel. However, due to the limited solubility of iodophor in the pressure-sensitive adhesive solution, the iodine-carrying capacity is not high.

Moreover, there is no chemical coordination bond interaction between iodophor and pressure-sensitive adhesive, so iodophor will be released quickly after being posted on the skin, and cannot play the role of slow release of iodine, so it cannot meet the requirements of long-term antibacterial. Therefore, a pressure-sensitive adhesive with high iodine content and slow release of iodine is needed to give acrylate pressure-sensitive adhesive a unique function of long-term antibacterial and expand its application in the field of medicine and health.

Biodegradable polymer materials have received a great deal of attention due to environmental and other issues associated with the use of petroleum products. Currently, biodegradable polymers are used in biomedicine, food packaging, and disposable items, but their limited properties limit their widespread use. Pressure-sensitive adhesives (PSA) represent a potential application (for example, tape, labels, stamps, and adhesive paper) that will further expand the range of applications for degradable polyesters. Traditional PSA materials are mostly composed of polyacrylate, rubber, polyurethane, and so on.

During the recycling process, these pressure-sensitive adhesives are broken up and the resulting large sticky material is effectively removed, but the slightly sticky material is still left behind causing what the recycling industry calls the “sticky” problem. These sticky substances can deposit on the equipment, resulting in a decrease in the quality of recovered materials and an increase in the cost of recovery.

One way to solve the “sticky matter” problem that remains in the recovery process of pressure-sensitive adhesives is to prepare degradable pressure-sensitive adhesives. Biodegradable pressure-sensitive adhesive can be degraded into small molecules under relatively mild degradation conditions or with the addition of green additives. At present, there is still little research on decomposable sensitive adhesives. The copolymers of methide and LA, methide and MeMBL, Pentadecyl Caprolactone, and LA have been reported in the literature. In addition to strong adhesion, these polymers contain ester bonds in their main chains, which can be broken by heating, thus achieving their degradability.

We found poly (1, 5 second -4-dioxane -2 – ketone (PDXO) is very similar to pressure-sensitive adhesive materials and literature reports of a polyether ester, the monomer 1, 5 second- 4-dioxane -2- ketone (DXO) implement commercialized long ago already, can use a mature method. Although the preparation method of DXO is relatively mature, the catalytic agents of ring-opening polymerization of DXO reported in most literature only revolve around stannous caprylate, aluminum isopropyl alcohol, organic strong base, etc.

The use of these catalysts is confronted with problems such as poor polymerization ability, high polymerization temperature, long polymerization time, uncontrollable molecular weight, and distribution. In recent years, the binary catalytic system has shown strong catalytic activity and control in the ring-opening polymerization of life, among which the Lewis acid and the base system have been widely used. It uniquely utilizes the two components of Lewis acid (LA) and Lewis base (LB) to cooperatively catalyze the polymerization of various monomers. Chain initiation, chain growth, chain termination, and chain transfer were significantly affected by balancing the acidity and basicity of LA and LB and their spatial interaction.

Traditional pressure-sensitive tape, protective film, and cold mounting film in the process of laminating, generally need manual detailed laminating, due to the protective film and cold mounting film itself self-adsorption performance is not good, need some ways to assist adsorption, such as Water spraying wetting, or scraper hanging, etc., need to repeat laminating to remove the bubbles generated in the laminating process, waste a lot of time and manpower, and cause a waste of resources.

The Chinese patent document CN114085411A (application No. : 202111524295.9) has disclosed a kind of imprint photoresist release film material with exhaust function, including a substrate layer, with an upper surface and a lower surface. It also includes a photoresist prepolymer coated on the upper surface or the lower surface of the substrate layer.

The photoresist prepolymer is solidified by light radiation to form an imprint lithography layer at the same time through mechanical contact on the surface of the embossed to form a plurality of exhaust grooves or exhaust grooves; The exhaust grooves or grooves divide the embossed lithography layer into convex blocks. The pressure-sensitive adhesive product forms an imprint lithographic adhesive layer on the substrate layer and forms an effective exhaust groove or exhaust groove by means of mechanical contact to solve the exhaust problem of viscous materials or pressure-sensitive adhesive products.

At present, the technical problem to be solved is to put forward a kind of emulsion type, forming a small closed air chamber in the adhesive layer, the pressure-sensitive adhesive with the self-adsorption function of automatic pressure exhaust air when sticking, and the tape using the pressure sensitive adhesive. People come up with a design that includes the following elements: Soft monomers 25 ~ 35, hard monomers 5 ~ 10, functional monomers 1 ~ 3, peroxide oxidant 0.01 ~ 0.1, reducing agent 0.1 ~ 0.9, emulsifier 0.5 ~ 1, foam stabilizer 0.1 ~ 1, pH regulator 0.01 ~ 0.2, pure water 50 ~ 60.

At present, most of our high-precision assembly or paste assembly uses double-sided tape. However, with the improvement of industrial technology development, energy saving and high precision multi-application demand performance are becoming higher and higher, the double-sided tape on the existing market in large size construction accuracy and deformable operation is difficult to achieve, many conditions are limited and waste cost, not environmental protection, and can not be used repeatedly.

Therefore, this traditional double-sided adhesive tape assembly method has been unable to meet the requirements of high-specification product assembly. With the continuous upgrading of industrial products and technology, pressure-sensitive glue adhesives because of its reusable, good toughness, strong adaptability, and simple process, therefore, it is widely used in aviation, automobile, machinery, ships, electronics, electrical appliances, instruments, architecture, furniture, toys, civil engineering, computer and optics, and other industries in various structures of bonding, small assembly, large assembly, and nameplate paste.

However, the common acrylic pressure-sensitive adhesive has some problems, such as low bonding strength and poor bonding adaptability with the coated material, which limits the rapid development of related industries to a large extent. Therefore, how to provide a pressure-sensitive glue with high bonding strength and strong bonding adaptability is an urgent problem for technicians in this field.

The utility model relates to a UV moisture double curing pressure-sensitive glue, which is characterized in that the technical proposal includes the following raw materials in weight: Polyester acrylates 19. 0 -20. 0, 2 -phenoxy ethyl acrylate 9. 0 -10. 0, hydroxyl ethyl acrylate 12. 5 -13. 5, 25. Different borneol acrylate 0 -26. 0, 2- lauryl acrylate 29. 0 -30. 0, p-hydroxy benzoic ether 0. 1 -0. 5, 2. 6 -BHT 0. 1 -0. 5, 2-hydroxyl -2 methyl phenyl acetone 1. 0 -2. 0 and 1 -hydroxyl cyclohexyl phenyl ketone 0. 5 -1. 5.

Silicone pressure-sensitive adhesive is a kind of organic silicon polymer as the main body of pressure-sensitive adhesive, because of its chemical structure high bond length, bond Angle, bonding energy, and low surface energy, low surface tension, low rotation required energy, etc, compared with traditional acrylic, rubber pressure-sensitive adhesive, it has excellent high and low-temperature resistance, in the harsh environment (-50 ~ 150 ℃) can be used for a long time.

Good wetting, spreading, and bonding properties for low surface energy materials such as fluorine and silicon; Excellent chemical resistance, insulation, and dielectric properties; With the rapid development of consumer electronics and handheld electronic devices, manufacturers have developed more and more touch screens, such as 2.5D screen, 3D screen, anti-fingerprint screen.

Among them, in order to make the screen smooth, scratch resistant, stain resistant, and other properties, the surface energy of the screen after anti-fingerprint coating treatment is very low, the traditional protective film on its peeling force is low and unstable, poor adhesion to the substrate, after peeling the screen surface silicon transfer and other deficiencies.

In view of the shortcomings of the above technology, a kind of silicone pressure-sensitive adhesive applied to anti-fingerprint glass is needed, which has high peeling force against the fingerprint screens and does not decay. The substrate has good anchoring properties, no degumming after 2h boiling, high cohesion strength, and no residual glue after high temperature and high humidity aging.

The preparation process is simple and easy to realize industrial production. At present, it can be prepared from the following raw materials: hydroxy-terminated polydimethylmethylvinyl raw gum of 30 ~ 70 copies; Hydroxyl MQ resin 5 ~ 70; Vinyl MQ resin 5 ~ 70 copies; 0.2 ~ 1 copies of benzoic acid; 0.2 ~ 1.0 doses of inhibitor; Solvent 60 ~ 120 parts; 3 ~ 3 copies of hydrogen silicone oil; 0.5 ~ 2 pieces of anchorage agent; Platinum catalyst 1.5 ~ 3 copies; The mass ratio of hydroxyl MQ silicone resin to vinyl MQ silicone resin is 1:0.1 ~ 10.