UNICELL-H Series

About this product

H series (p-toluenesulfonylhydrazide) produces non-discoloring, low-odor cellular foams and is designed for regular open- or closed-cell rubber. It delivers excellent performance without activators at conventional curing temperatures, is recommended for materials with low shrinkage when exposed to light or heat, and also has commercial applications in thermosetting polyesters and PVC sealants.

From the data sheet (UNICELL_H.pdf):

*p-Toluenesulfonylhydrazide

*Specially designed foaming agents for rubbers and plastics

Description

UNICELL-H series, the trade name of p-toluenesulfonylhydrazide, produces non-discoloring and low odor cellular foams. UNICELL-H series is designed for regular opened/closed rubber and fine cellular structures. It has excellent performance without activators at conventional curing temperature.

UNICELL-H series is especially recommended for the less shrinkable materials when exposed to light or heat.

UNICELL-H series also has commercial applications for thermosetting polyesters and PVC sealants.

Properties of UNICELL-H series

Decomposition of UNICELL-H series

A possible decomposition mechanism of UNICELL-H series has been suggested as follows;

UNICELL-H releases N2, H20, and p-toluenesulfonic acid as an unstable intermediate when heated. The unstable p-toluene sulfonic acid turns into ditolyl disulfide and tolyl paratoluene thiosulfonate immediately. The sulfur-containing decomposition residues can function as curing agents in rubber compositions.

Applications

The decomposition rate of UNICELL-H series is appropriate for low processing temperatures and does not require decomposition activators. Processing conditions should be carefully adjusted to prevent loss of foaming efficiency. UNICELL-H series significantly activates curing during the foaming process; therefore, the addition of secondary accelerators is generally unnecessary.