Development of alternate silicone potting compounds. Vol. 4. Development of a substitute for Dow Corning's aerospace sealant DC 93-120 resin cured with DC 93-122 curing agent
A substitute for Dow Corning DC 93-120 silicone potting resin cured with DC 93-122 silicon curing agent can be formulated from Dielectric Gel Q3-6527, accelerator QCF3-6559, and DC 1107 fluid. The substitute is much lower in viscosity than the material it replaces, but it is equally fast setting, friable, and weak as measured by butt-tensile strength to aluminum. Evaluations are described for two lots of Q3, three lots of DC 1107, and two lots of accelerator. The 1107 and accelerator are minor components whose lot-to-lot variations are not significant. The only significant variable is the reaction rate of the Q3. Because Q3 cannot be activated by the platinum-containing accelerator alone to a gel time of 15 min, the active hydrogen concentrate DC 1107 is needed. Using both accelerator and 1107 in proportions to minimize 1107 is preferred because this decreases the likelihood of porosity in the cured potting compound.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6319063
- Report Number(s):
- UCRL-52434(Vol.4)
- Country of Publication:
- United States
- Language:
- English
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