Catalysts are accelerators for many chemical reactions. Catalyst is an important additive for synthetic resins, and polyurethane is no exception. Polyurethane catalystShorten reaction time, improve production efficiency, selectively promote positive reactions and inhibit side reactions. In the production of many polyurethane products, catalyst is a commonly used additive. Although the dosage is small, it has a great effect.
In the formulations of polyurethane elastomers and adhesives, coatings, sealants, waterproof coatings, paving materials, etc., organometallic catalysts such as dibutyltin dilaurate are more commonly used. They promote the interaction between isocyanate groups and hydroxyl groups. The reaction is very effective, but it also has a certain acceleration effect on the reaction between water and isocyanate in formulas with moisture, so special catalysts such as organic lead can be used in formulas such as plastic runways. Tertiary amines with strong gelling properties (mainly promoting the reaction between isocyanate groups and hydroxyl groups) such as triethylenediamine can also be used in some elastic polyurethane formulations.
When selecting a catalyst suitable for polyurethane and its raw materials, we must not only consider the catalytic activity (related to the lowest concentration used) and selectivity of the catalyst, but also consider the physical state, ease of operation, and other raw material components. Factors such as mutual solubility, stability in the mixed raw material system, toxicity, price, whether the catalyst residue in the product has a detrimental effect on the polymer performance, etc. Shanghai New Materials Technology Co., Ltd. is a high-tech enterprise focusing on the research, development, production and sales of organometallic catalysts. Its main products include polyurethane catalysts, Organozinc, Organic bismuth, organic zirconium, organic rare earth, etc. rely on its own advantages to provide customers with professional customized product services, technical guidance and differentiated technical solutions.
There are many types of polyurethane catalysts. Considering the constraints of various factors, there are more than 20 types of catalysts commonly used in polyurethane production, and more emerging industries and special processes require more special catalysts to play a role. , with the continuous development of the industry, I believe that more and more new catalysts and special properties will be developed.
