can't read?
Polycaprolactone (PCL) is a biodegradable polyester with a low melting point of around 60 °C and a glass transition temperature of about -60 °C.
P 1967 (OTTO) Polycaprolactone, average Mn 45,000 Cas no 24980-41-4 - used include extrusion aid, die lubricant, mold release, pigment and filler dispersion aid and polyester segments in urethanes and block polyesters.