Introducing the Range of SEKISUI S-LEC SV Resins
S-LEC SV is a new resin from SEKISUI which maintains the same great characteristics as the S-LEC B resin series, but also has excellent rheological properties.S-LEC SV is a new resin from SEKISUI which maintains the same great characteristics as the S-LEC B resin series, but also has excellent rheological properties.
- S-LEC SVis a new polyvinyl acetal based polymer with excellent rheological properties
- S-LEC SVbonds strongly to metals and inorganic materials like glass and ceramics
- S-LEC SVis remarkably tough and flexible
In general, polymer/solvent solutions exhibit elongational or honey-like stringing properties caused by polymer chain entanglement.
This stringing phenomenon causes processing and quality problems in production.
S-LEC SV is a resin specially formulated to prevent stringing.
Comparison data for S-LEC SV and PVB solutions are shown in Fig. 1.
Conventional PVB solution strings readily, while S-LEC SV has low stringing properties which vastly improve processibility.
*Time required for liquid string of resin/solvent solution to break
Solvent: Dihydroterpinyl Acetate
Solution Viscosity: 3.5 Pa･s
S-LEC SV is soluble in many organic solvents (alcohols, esters, ketones and terpineols).
Table1: Solubility of S-LEC SV
Metyl ethyl ketone(MEK)
Butyl Carbitol Acetate(BCA)
Key: (S)Soluble, (PS)Partially Soluble, (IS)Insoluble
Test Method: Resins (1 g) were dissolved in solvent (20g) at 20'C
S-LEC SV Types and General Characteristics
|Grade||Molecular weight||Volatiles||Free Acid||Hydroxyl Content||Viscosity (mPa.S)|
|SV-02||LOW||3% max||0.05% max||ca 22mol%||10|
|SV-05||HIGH||3% max||0.05% max||ca 21mol%||120|
|SV-06||HIGH||3% max||0.05% max||ca 22mol%||90|
Ethanol:Toluene (1:1), resin content 5% solution
All values measured by Brookfield (type BM) viscometer at 20'C
All values shown are not specification limits