SCAVENGERS FOR ONE-COMPONENT ALKOXY-FUNCTIONAL RTV COMPOSITIONS AND PROCESSES

摘要

60SI-579 SCAVENGERS FOR ONE-COMPONENT ALKOXY-FUNCTIONAL RTV COMPOSITIONS AND PROCESSES The present invention relates to an alkoxyfunctional one-component RTV silicone rubbers composition which is shelf-stable and fast-curing. The composition is formed by reacting an alkoxy-terminated polysiloxane polymer with an alkoxy-functional cross-linking agent in the presence of a condensation catalyst. The present invention lies in the use of silicon-nitrogen compounds and silicon-nitrogen polymers as scavengers for unendcapped hydroxy groups in the above polyalkoxyfunctional RTV systems. A preferred silicon-nitrogen compound is hexamethyldisilazane. The compositions are useful as binders and sealants.