Adhesives for thermoset materials often must bond very different materials to one another, which introduce peculiar engineering problems.
are materials that have the property of becoming hard and
when cured and are normally do not melt when heated. Thermosets fuse when heated and harden
and become rigid when cooled. Thermosets can come
in many different chemical formulae, giving them different
chemical properties, and in varying thicknesses -- both of
which affect their coefficient of expansion. Thermosets
include castable polyurethane, rubbers, epoxies,
etc. Castable polyurethane is a material manufactured
of thermosets to themselves, and to other substrates using adhesives,
requires careful preparation and matching of the adhesive
being used with the differing COEs of the substrates involved
and matching other mechanical and chemical properties
for the application. BONDiTTM products
are among the few available that can be used to bond
differing COE's for harsh environments and long term deployment
without debonding. See also our discussion of COE's.
recommendation for bonding castable polyurethane
to other substrates during the casting process is the BONDiT TM
B-45, or with an adhesion promoter like the BONDiTTM A-43
In circumstances requiring very high moisture resistance
we recommend substituting the BONDiTTM A-3
in place of the A-43 or C-6.
In bonding to cured
parts casted using
urethane, we recommend simply using BONDiTTM B-45
-- no adhesion promoter is necessary.
recommendations for bonding to rubbers is contained in a
Our recommendation for bonding to epoxies is any of the BONDiTTMB-4X line, depending on the required resistance properties of the use and environment to which the bond will be subjected. Please call for specific application recommendations.
the other substrates which thermosets can be bonded to using
are: UHMW, Delrin, fluoropolymers, copolymers, polyethylene,
polyolefin, polypropylene, polyurethane, silicone, rubber, thermoplastics, urethane,
other thermosets and thermoplastics, ceramics, glass, fiberglass, wood, metals,
To see our chart showing elongation rankings of the various
click here. Call or email us for advice on for COE ratings
and matching BONDiTTM products
for your application at (707) 284-8808 or email@example.com.