Crystalline oligomers or low molecular weight prepolymers
are heated under vacuum or in an inert gas stream.
Exceptional performance comes from certain diamine cured low free PPDI prepolymers
Suprasec is the trade name for Huntsman's range of MDI and MDI-based prepolymers
which are used to formulate adhesives, coatings and elastomers.
in the backbone of the sealants provide most of the sealant's properties.
He presents several variants of surface techniques with monotype functional groups, such as chemical post-plasma reduction, pulse-pressure plasma polymerization, underwater plasma and glow discharge electrolysis, and deposition of functionalized prepolymers
and oligomers by aerosol and electrospray.
The silanes, marketed under the trademarks Silquest, CoatOSil, NXTT and XL-PEarl, and silane-based SPUR+ prepolymers
, have a range of specialty applications.
Then, the two prepolymers
were mixed for further reaction to obtain WHBPUADs.
Bayer MaterialScience LLC has been granted a patent for polyisocyanate addition compounds, which are substantially free from isocyanate groups and are prepared from one or more polyisocyanate adducts containing uretdione, allophanate, carbodiimide and/or oxadiazinetrione groups and/or NCO prepolymers
, contain urethane groups, contain fluorine (calculated as F, AW 19) in an amount of 0.
Dow Hyperlast says pipeline pigs manufactured from DIPRANE [TM] 53, a polyester quasi MDI prepolymer
, experience less wear, allow for increased safety and energy savings, and have a longer working life than similar pigs manufactured from full TDI polyester prepolymers
Airthane TDI PUR prepolymers
for castable elastomers.
For this purpose, CWO/pMDI prepolymers
with different ratios of CWO to pMDI were prepared, and their chemical structure and adhesive performance were examined by Fourier transform Infrared (FT-IR) spectrum and bond strength measurement.
Now available for sampling, the new MAC prepolymers
will be commercially available later this year, says BMS.