German technical background VOK-P 9902 Processing aids Used to improve polyurethane foam replaces BYK-P 9902

German technical background VOK®- P 9902 is a processing aid used to improve the compatibility of polyol blends in polyurethane foam applications.

Product Data

Typical characteristics

The values indicated in this data sheet describe typical characteristics and do not constitute specification limits.

Density (20 ℃): 1.08 g/ml Refractive index: 1.425 Viscosity (25 ℃): 200 mPa · s

storage and transportation

Separation or turbidity may occur during storage or transportation at temperatures below 10 ℃. Heat to 20 ℃ and mix thoroughly. Product efficiency will not be affected.

Special instructions

The product contains 50% (by weight) of water as solvent. The amount of water in the formula needs to be adjusted according to the dosage.

application

PU soft foam

Special features and advantages

VOK®- P 9902 is an additive used to improve the compatibility of polyol mixture in the application of PU soft foam.

It improves the emulsification of standard polyether polyol with high epoxy propane content and polyether polyol with high epoxy ethane content. It can improve the uniformity of physical properties on the cross section of the block. In addition, it can also prevent optical defects such as turbidity, shadow or stripe, especially in colored foam with high EO polyol content.

VOK®- P 9902

Recommendation level

Polyol based 0.2-0.8% additive (when supplied).

The above recommended levels can be used for orientation. The good level is determined through a series of laboratory tests.

Consolidation and Processing Instructions

The additive can be premixed with the standard polyol or added separately through a special pipe in the mixing head.