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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 SV is a new polyvinyl acetal based polymer with excellent rheological properties
S-LEC SV bonds strongly to metals and inorganic materials like glass and ceramics
S-LEC SV is remarkably tough and flexible


Features
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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




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