Silicone adhesives

The silicone adhesives used in the early days came from natural materials. For instance, animal and plant adhesives. Most of them were soluble in water. However, with the development of modern industry after the 20th century, both the output and performance of natural adhesives can’t meet the requirements. Baekeland created the industrial phenolic resin in 1909, which led to the discovery and promotion of various synthetic adhesives. These adhesives are excellent for industries like architecture, decoration, automobile, shoemaking, textile and electronics.

Categories

Depending on the type of resin, we divide silicone adhesives into the following categories:

• Epoxy adhesives; Epoxy resin adhesives belong to thermosetting resin adhesives. Most importantly, it has good bonding performance and high bonding strength with all kinds of metal and non-metal materials. Also known as “versatile adhesive”. Application examples are construction, automobile, electronics, electrical appliances and daily household items (kitchen).
• Polyacrylic Resin adhesives: Excellent product in the production of pressure-sensitive adhesives, but also in the textile and construction industries.
• Polyurethane adhesives: It can bond a variety of materials (even glass) and maintain the physical and chemical properties at low or ultra-low temperatures after bonding.
• Melt adhesives; Such as EVA hot melt adhesives, polyamide hot melt adhesives, polyester hot melt adhesive, polyolefin hot melt adhesives.
• Silicone adhesives; Its unique molecular structure provides the remarkable weather resistance, making it resilient after prolonged exposure to the outdoors. It has the advantages of specifications like no foaming and cracking, durable bonding strength and good extrusion performance. Certainly, silicone adhesive have good performances in outdoor, indoor, humid, low temperature and other working environments. Usually available in white or different colour as curing agent.

Problems in adhesive modification

When adhesives are being used in a high temperature environment or exposed to UV light, the bond strength will decrease or even be completely destroyed. In fact, adhesives may turn yellow and discolor after prolonged use. Which seriously affecting the appearance of the product. To maintain the long-term stability of adhesives during storage and use, it is essential to add stabilizers and antioxidants to the formulation. The combination can greatly improve heat oxidation resistance and withstand high temperatures.

Key factors to be considered in selecting right additives

• Good compatibility with adhesive substrate
• The production process and physical and mechanical properties of adhesives won’t be affected
• Storage stability. It won’t produce discoloration, stratification, gel phenomenon
• Non-toxic and less pollution

Omnistab additive solutions

We can offer your Omnistab antioxidants, UV absorbers and HALS products to protect the adhesive sealant or silicone sealant. Hindered phenol and auxiliary antioxidants like AN 626, AN 1135 and AN 1726. In the range of UV absorbers we can offer UV P, UV 1, UV 234 and UV 326 for example. HALS product which is excellent in adhesive production is the LS 292. In addition, click on the product for more information. In conclusion, for the best possible recommendation for your application please contact your representative. Or send us a new inquiry through the website through the contact page were we delivering tailored adhesive solutions.

Frequently asked questions