Sustainable hot-melt adhesives (HMA) from polycaprolactone (PCL) and soybean protein isolate (SPI)

TOUS, L.; CIANNAMEA E.M; RUSECKAITE R. A.

MAR DEL PLATA

Simposio; SLAP 2018; 2018

Hot-melt adhesives (HMAs) are thermoplastic materials that are applied in the molten state and solidify upon cooling to consolidate the adhesion1,2. The conventional formulations contain a base polymer (i.e. polyolefins), a tackifier (i.e. aliphatic hydrocarbons that grants the tack) and waxes or plasticizers (i.e. paraffin, to control the melt viscosity)1. All these components can be replaced by more environmentally sound alternatives derived from renewable resources to fulfill environmental requirements2. In this sense, the goal of this work was to develop and characterize HMAs based on soybean protein isolate (SPI) with well-known adhesive ability3, a synthetic biodegradable thermoplastic polymer, polycaprolactone (PCL), castor oil (CO) as plasticizer/ compatibilizing agent and pine resin (PR) as a tackifier.