Preparation and evaluation of diallyl isophthalate molding powders containing aramid fibers with other fillers
Nomex and Keylar chopped fibers were used with: Solem 336SP, an alumina trihydrate powder, Fybex, a titanium silicate fiber or Ekkcel C-1000, a poly hydroxy ester powder, to formulate experimental diallyl isophthalate molding powders. One objective of the study was to obtain plastic moldings with higher heat distortion values than the diallyl phthalate based formulation. A second objective was to develop a molding powder that could be substituted for the asbestos filled diallyl phthalate product now produced at Mound Facility, thus eliminating OSHA restrictions on asbestos processing. Both Nomex and Kevlar can be used satisfactorily with Solem 336SP as fillers in diallyl isophthalate molding powders. When Fybex or Ekkcel C-1000 were used with Nomex in diallyl isophthalate formulations, the molded test specimens were characterized by low arc resistance values. Presumably, the same condition would result if Kevlar were used in place of Nomex in these formulations. The most satisfactory Nomex-containing formulations prepared contained 26 parts by weight of detergent-treated Nomex chopped fiber (64-cm long), 103 parts of Solem 336SP, 2.4 parts of calcium stearate, 1.2 parts of Scarlett pigment, 0.03 parts of hydroquinone and 100 parts of a mixture of Dapon M (a diallyl isophthalate prepolymer and diallyl isophthalate monomer). The most satisfactor Kevlar-containing formulation prepared was composed of 18.5 parts by weight of detergent-treated Kevlar chopped fiber (64-cm long), 118.6 parts of Scarlett pigment and 100 parts of the diallyl isophthalate prepolymermonomer blend. Both of these formulations might be acceptable substitutes for Mound asbestos-filled diallyl phthalate molding powder.
- Research Organization:
- Mound Plant (MOUND), Miamisburg, OH (United States)
- DOE Contract Number:
- EY-76-C-04-0053
- OSTI ID:
- 6213922
- Report Number(s):
- MLM-2576
- Country of Publication:
- United States
- Language:
- English
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