Requalification of White Thermal Control Coatings.
Abstract
The lIT Research Institute (IlTRI) supplies the aerospace community with three spacecraft thermal control coatings: S13G/LO-1, YB-71 (ZOT), and Z93, all of which incorporate inorganic potassium silicate as a component in their compositions. However, the particular potassium silicate being used, "PS7", is no longer manufactured. The objective of this requalification program was to develop coating formulations with a new silicate binder/encapsulant material. Encapsulation studies for S13G/LO-1 were conducted to obtain a stabilized Zn0 pigment for this silicone binder formula- tion. With the inorganic Z93 and YB-71 formulations, the new silicate binder was to provide equal or improved optical and physical behavior for these compositions. Studies indicate that Kasil 2130 (PQ Corporation) is a satisfactory replacement in S13G/LO-1 and Z93. The development of formulation, processing and application techniques have yielded 2130-based S13GP/L0-% and Z93P which show equivalent optical and physical behavior to their *PS7"-based predecessors. The suitability of Kasil 2130 as a binder in the zinc orthotitanate-pigmented Y3-71 has not been clearly determined, and studies are being continued. (MM)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1994
- Accession Number
- ADA297745
Entities
People
- Mukund Deshpande
- Yoshiro Harada
Organizations
- IIT Research Institute