Poly(vinyl chloride-co-isobutyl vinyl ether)

Poly(vinyl chloride-co-isobutyl vinyl ether) (CAS 25154-85-2), also known as vinyl chloride-vinyl isobutyl ether copolymer, is a thermoplastic resin produced by copolymerizing vinyl chloride with isobutyl vinyl ether.

The isobutyl vinyl ether component acts as an internal plasticizer, improving flexibility and processability without requiring separate plasticizer additions. In coatings formulations, this copolymer improves film flexibility and adhesion.

It provides excellent adhesion to difficult substrates including metals and plastics, making it suitable for industrial protective and decorative finishes. Printing ink manufacturers use it as a binder resin where controlled viscosity is critical.

Substrate wetting is essential to print quality on flexible packaging films. In adhesive and sealant systems, it contributes cohesive strength while maintaining the soft, conformable character needed for applications.

It is ideal for pressure-sensitive and heat-seal applications. Plastics compounders incorporate it to modify the rheological profile of PVC-based compounds, easing processing at lower temperatures during manufacturing.

This copolymer is supplied as a white to off-white powder or granules, with particle size and molecular weight varying by grade. Technical-grade material is the standard commercial offering for industrial use.

Grades are differentiated by viscosity or K-value to match specific processing requirements. Packaging typically ranges from 25 kg bags to bulk quantities for industrial buyers seeking high-volume chemical supplies.