As low profile additive in SMC production

Description

A Typical Application of Polyvinyl Acetate for SMC:

Polyvinyl Acetate (pvac) is used as low-profile additives in fiber-reinforced plastics (FRP) composites to achieve zero-shrinkage, class A surface quality, full viscosity control and design flexibility.

– Nitchen Polyvinyl Acetate (pvac) Solution in Styrene

Nitchen PVAC low-profile additives (LPAs) are almost exclusively used as solutions in styrene. Our polyvinyl
acetate solid resins are readily soluble in styrene and thus enable you to prepare PVAC solutions in styrene as per requirements.

– Preparing a PVAC Solution in Styrene

Add the Nitchen polyvinyl acetate resin to styrene while stirring well to prevent the formation of lumps during dissolution. This should usually be done at room temperature; some temperature increase during the dissolving process is normal and is due to shear friction. Protect the resulting solution from direct light during storage.

Additional heat will increase the rate of dissolution. However, control the stability of the solution, because styrene monomer has a tendency to polymerize. While our PVAC LPA solution typically contains 40% solids, this
may vary with the molecular weight of the grade and the compound formulation.

Average figures for polyvinyl acetate as LPA solutions in styrene are:
HV-Series 30 – 40%