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Coating Resins used for PaintsSaturated Polyester Resin <ESPEL>

Image of <ESPEL>

ESPEL9940 series are high molecular weight saturated polyester resins developed for PET film adhesives.
Linear or branched saturated polyester resins are available with variable Tg and molecular weight.

Features

  • The PET-like composition offers excellent adhesion to PET films.

Characteristics

Polyester resins ESPEL 9940A ESPEL 9940B ESPEL 9940 C-37 ESPEL 9940D ESPEL 9940 E-37
Items
Non volatile content % 40.5 40.4 37.8 50.2 37.5
Viscosity GN Y W−Y F U+ E
Acid value 1 or less 1 or less 1.8 2.3 2.9
Hydroxyl value*1 Solid equivalent 5−10 5−10 10−20 10−20 15−25
Color GN 1or less 1−2 3 2−3 2
Resin Tg Designed value, °C 10 25 10 25 25
Measured value, °C 27
Resin type Linear Linear Branched Branched Branched
Molecular weight *2 Mw
Mn
Mw/Mn
56,000
19,000
2.9
50,000
18,000
2.8
24,000
10,000
2.4
27,000
11,000
2.5
32,000
10,000
3.2
Solvent composition Weight ratio Toluene/methyl ethyl ketone=80/20
*1
Hydroxyl value: Designed value, solid equivalent
*2
Molecular weight: GPC measurement, standard polystyrene equivalent

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