S-LEC SV

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

 Features

<Rheological Properties>

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.

Stringing comparison

*Time required for liquid string of resin/solvent solution to break
Measurement Conditions:
Solvent: Dihydroterpinyl Acetate
Solution Viscosity: 3.5 Pa・s


Solubility

S-LEC SV is soluble in many organic solvents (alcohols, esters, ketones and terpineols).


Table1: Solubility of S-LEC SV

SOLVENT SV-02 SV-05 SV-06

Ethanol

S S S

Ethil acetate

S PS S

Metyl ethyl ketone(MEK)

S PS S

Tolene

IS IS IS

Terpineol

S S S

Dihydroterpineol Acetate(DHTA)

S PS S

Butyl Carbitol Acetate(BCA)

S PS S

Key: (S)Soluble, (PS)Partially Soluble, (IS)Insoluble
Test Method: Resins (1 g) were dissolved in solvent (20g) at 20'C

Viscosity of S-LEC SV

Viscosity of S-LEC SV

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

Notes:
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