INTRODUCTION
920R is a silane modified polyurethane resin based on high molecular weight polyether, end-capped with siloxane and containing carbamate groups, has the characteristics of high activity, no dissociative isocyanate, no solvent, excellent adhesion and so on.
920R curing mechanism is moisture curing. Catalysts are needed in sealant formulation. Ordinary organotin catalysts (such as dibutyltin dilaurate) or chelated tin (such as diacetylacetone dibutyltin) can achieve good mechanical properties. The recommended amount of tin catalysts is 0.2-0.6%.
920R resin combinated with plasticizer, nano calcium carbonate, silane coupling agent and other fillers and additives can prepare sealant products which has tensile strength of 2.0-4.0 MPa, 100% modulus between 1.0-3.0 MPa . 920R can also be used to prepare transparent sealants which are widely used in building exterior wall, home decoration, industrial elastic sealant, elastic adhesive and so on.
TECHNICAL INDEX
|
Item |
Specification |
Test method |
|
Appearrance |
Colorless to pale yellow transparent viscous liquid |
visual |
|
Colour value |
50 Max |
APHA |
|
Viscosity (mPa·s) |
50 000-60 000 |
Brookfield viscometer under 25 ℃ |
|
pH |
6.0-8.0 |
Isopropanol/aqueous solution |
|
Moisture content(wt%) |
0.1 Max |
Karl Fischer |
|
Density |
0.96-1.04 |
25 ℃ water density is 1 |
PACKAGE INFORMATION
|
Small package |
20 kg iron drum |
|
Medium package |
200 kg iron drum |
|
Large package |
1000kg PVC ton drum |
STORAGE
Place in a cool and ventilated place.Unopened preservation at room temperature.The product storage time is for 12 months.Non-flammable goods, according to conventional chemical transport.