First series
Polyurethane polyols in polyurethane elastomer and thermoplastic elastomer.
Second series
Polyester polyols in upscale, middle-grade and low-grade double component adhesive.
Third series
Polyester polyols in soft and hard polyurethane.
Fourth series
The hardness of prepolymer adjusted by customer demando.
( 80--96)
Forth Series
The hardness of prepolymer adjusted by customer demando. (80--96)
