PVC Plastisols

Release from paper

We are facing some problems in separating the PVC film from the release paper. Do you have some products that can help?

For your special application, I would recommend BYK®-P 4100. Dosage should be between 0.1-0.5%. 

PVC plasticizer

After changing from phthalate plasticizers like DINP to phthalate-free like DOTP I am facing migration problem in the final product.

Low compatible viscosity depressants like hdrocarbons are less compatible with DOTP. Our recommendation is to use Viscobyk 5120.

Air release

In the final product I observe microfoam which results in poor quality.

Air is entrapped by mixing the PVC plastisol or the coating process. We recommend to add 0,5 phr of BYK 3155.

Filler increase

When I increase the filler in my plastisol, the viscosity is too high and I have to add too much viscosity depressant.

The best cost performance can be achieved by adding BYK 1165 to the filled plastisol. Dosage should be 1 % on filler.

Dilatant flow

For special reasons I have to use dilatant PVC resins. What do you recommend to reduce the dilatancy of my PVC plastisol?

For this application BYK developed the BYK 1160-family. Dependend on the PVC resin, we recommend to try BYK 1160, BYK 1163 or BYK 1164.

PVC calendering

After changing from phthalate plasticizer like DINP to phthalate-free like DOTP I see some plate-out on my calendering rollers.

In slow gelling systems the risk of migration of internal and external lubricants is increased. We recommend to replace all lubricants by BYK P 4100. The dosage of the additive should be reduced by at least 50%.

Thixotropy of PVC paste

After changing from DINP to DOTP and DINCH BYK 410 becomes less efficient.

In non phthtalate systems we recommend to try Garamite 1958 or Garamite 7303.

Floading and floating of pigments in PVC plastisols

In the coating machine I see separation of blue and white pigments. What do you recommend?

The post-addition of rheology performing additives like BYK 410 or Garamite 1958 or Garamite 7303 will increase the low shear viscosity. This will reduce the movement of the pigments in the coating machine.