L-6701 is a non-hydrolyzable silicone copolymer
specially designed for use in rigid
polyurethane spray foam blown with liquid HCFCs, such
as HCFC-141b. Since HCFCs have significantly different
solvent potency and vapor thermal conductivity than CFC-11,
it is necessary to use a special silicone to obtain optimal
k-factor and physical properties. This silicone also gives
good results in water-reduced CFC-11 spray foams.
L-6701 is unique in the ability to provide good
k-factor, excellent surface, fine cell
structure and excellent adhesion on rigid polyurethane
spray foams.
◎ Smooth surface in HCFC-141b spray foams. No 겁orange
peeling" as observed with some
silicones
◎ Good k-factor resulting from fine cell structure
◎ Excellent adhesion to substrates and foam-to-foam spray
adhesion during spraying.
Properties
Specification
Physical Appearance
Liquid
Viscosity(25℃, cSt)
175
Color(GVS)
3
Specific Gravity(25℃)
1.06
Freezing Point, ℃[℉]
<0[<32]
Flash Point(PMCC, ℃[℉])
182[360]
▶Applications
L-6701 offers superior performance
to exiting silicones in rigid polyurethane
spray foams.
A preferred use level of this material is
1.0 part by weight per 100 parts of polyol.
However, since optimal concentration is dependent
on the requirements of the individual application
and formulation, the use level may vary.
