Applications
[1] Stabilizer
 

Kuraray EXCEVAL is a new water soluble polymer with the original
technology. It has been on sale as a high performance polymer since
1999, with a lot of supports from the market.

In addition, KURARAY has recently developed new grades of
EXCEVAL™, “RS-1000 series”, with the original technology
accumulated in polyvinyl alcohol (PVOH) and ethylene vinyl
alcohol.

Kuraray EXCEVAL™ is controlled in hydrophobic – hydrophilic
balance and provides good water resistance, sufficient viscosity
stability of its aqueous solution and water solubility together.

Kuraray EXCEVAL™ for excellent high water resistant PVAc
emulsion – 1-component D3 adhesive without any cross-linking
system, and 1-component D4 adhesive with cross-linking
system can be achieved - it provides a better solution for you.

D3 Emulsion : European standard, resistant to 20°C(68°F) water.
D4 Emulsion : European standard, resistant to boiling water.

Kuraray EXCEVAL™ for D3-adhesive
(without cross-linking system)


Adhesive strength of wood
Due to its high water-resistance, Kuraray
EXCEVAL™　HR-3010 & RS-2117 can
achieve D3 level standard emulsion
without using any cross linker.
  Protective
colloid		 Crosslinker Adhesive Property
D2 D3
* 2
>8N/mm2		 * 3
>2N/mm2		 * 4
>8N/mm2
HR-3010
(10phm)		 none 14.6 3 13.6
RS-2117
(7.5phm)		 none 13.9 2.9 13.6
D3-Em AlCl3 14.2 2.5 13.3
Adhesive property ; Measured based on British Standard
* 2 ; 3 hours in cold water, 7days at 65%RH and 20°C(68°F)
* 3 ; 4 days in cold water at 20°C(68°F) samples tested wet
* 4 ; 4 days in cold water, 7days at 65%RH and 20°C(68°F)
D3-Em;commercially available D3-Emulsion

Kuraray EXCEVAL™
for D3, D4-adhesive with cross-linking system


Adhesive strength of wood

With using cross linker for EXCEVAL™
polymerization system, even RS-1717, the
medium hydrolyzed EXCEVAL™ can
achieve D4 level high water resistant
emulsion.

Adhesion test of emulsion
  Protective
colloid		 Adhesive Property
D3 D4
* 3
>2N/mm2		 * 4
>8N/mm2		 * 5
>4N/mm2		 * 6
>8N/mm2
RS-1717
(7.5phm)		 2.8 14.1 1.6 13.6
D3-Em 2.5 13.3 1.5 12.6
Adhesive property; Measured based on British Standard
* 3 ; 4 days in cold water at 20°C(68°F) samples tested wet
* 4 ; 4 days in cold water, 7days at 65%RH and 20°C(68°F)
* 5 ; 6 hours in boiling water at 20°C(68°F) samples tested wet
* 6 ; 6 hours in boiling water, 7days at 65%RH and 20°C(68°F)
D3-Em;commercially available D3-Emulsion

All rights reserved,Copyright(c)2004,KURARAY CO.,LTD.