Coatings Expand into Newer Application Areas
If a compound is cured
under a sufficient pressure for a long enough time, many times porosity can be avoided (ref.
In all cases, the target of 10 lb of cured
sand/sec of purge time has been met or exceeded.
Due to the fast cure speed of the addition cured
material, it is usual to reduce the mold temperature to obtain time to fill the mold while still giving a 50% reduction in cure time over a standard peroxide cured
The fully cured
vacuum-molded part is 57% more impact resistant than the undercured control part.
Upon completion of the building process the build platform is raised, and the partially cured
and uncured sand is removed from the machine.
systems (hotbox, warmbox and shell) are those in which the binder is mixed with the sand and catalyst, and blown into a heated corebox or against a pattern to produce the core or mold.
The products include Chemlok 8114 for bonding Vamac, bisphenol curing FKM, polyacrylates, ethylene acrylic and peroxide cured
EPDM elastomers; Chemlok 8115 for bonding sulfur cured
NBR and Vamac elastomers; Chemlok 8116 for bonding peroxide curing compounds such as silicone, EPDM, FKM and HNBR elastomers; and Chemlok 8117 for bonding peroxide curing compounds such as silicones, EPDM, FKM and HNBR, as well as bisphenol compounds and Vamac elastomers.
with these products reportedly have at least double the toughness, flexibility, and thermal-shock resistance obtained with aliphatic amines and polyamides.
In addition to carbon, oxygen and hydrogen, these cores contain small amounts of sulfur after they are cured
Tg for urethane cured
with KR 44 is 468 F versus 241 F for one cured
Cores could then be blown and gas cured
on the same machine.
Various authorities worldwide have already mentioned LEDs to be the ultimate light source for activating light cured
materials in the future.
rubber compounds used in down-hole applications are engineered materials especially designed for this application.
Electron curing at ambient temperatures has reduced the stresses in unidirectional composites by at least 75%, compared with an equivalent composite heat cured
at 302 F.