German technical background VOK-S 750 Styrene volatilization inhibitors Does not affect the interlayer adhesion of laminated polyester resin replaces BYK-S 750

German technical background VOK®-S 750 styrene monomer volatilization inhibitor for unsaturated polyester resin

VOK®-S 750 N Styrene volatilization inhibitor for unsaturated polyester resins containing dicyclopentadiene (DCPD), isophthalic acid and vinyl ester resins. Does not affect the interlayer adhesion of laminated polyester resin. 

Product Information 

Chemical composition 

A mixture of wax with polar components 

Typical materialized data 

The data presented on this data page are typical values only and are not technical indicators of the product. 

Density (40 °C): 0.85 g/ml 

Flash point: > 100 °C 

Purchase form: paste 

Storage and transportation 

Temperature sensitive. Store and transport in the temperature range of 20-50 °C. Delamination or turbidity may occur during storage and transportation. Disperse evenly before use. 

Application areas 

Room-temperature curing resin system 

Product features and benefits 

VOK®-S 750 N was specifically developed for volatilization inhibitors in DCPD-containing resins that make it difficult to form surface films due to the good solubility of VOK®-S 740. VOK®-S 750 N reduces volatilization without affecting interlayer adhesion, and also has good results in isophthalic acid resins and vinyl ester resins. 

Recommended dosage

0.3-1% additive dosage (purchased form) is based on total formulation. 

The above recommended addition amount is for reference, and the suitable addition amount needs to be determined by a series of tests.

Incorporation method and processing guidance 

VOK®-S 750 N must be stirred well before adding to ensure homogeneity of the product. VOK®-S 750 N should be added to the resin before other formulation components are added with continuous agitation. To ensure that the good crystal structure of VOK®-S 750 N is not affected, the product must not melt. 

Special considerations 

In non-thixotropic resins, VOK®-S 750 N during storage has a tendency to flocculate and precipitate on the resin surface. In the case of delamination, the resin must be stirred before processing.