Among the methods which does not use an organic solvent, the hot-melt method exhibits high productivitybut is somewhat limited in terms of performance. In order to resolve the disadvantages of conventional hot-melt pressure-sensitive adhesives, we have proposed thermally processable pressure-sensitive adhesives with a completely new structure which have the isocyanate dimer structure. Thedimer was known to dissociate to isocyanate at high temperature. In this report, in order to check thecompatibility of this system in industrial process, we estimated the material liquidity on the heatingby the Laboplast mill manufactured by Toyo Seiki, and we tried to make a pressure sensitive adhesivesheet by the extrusion machine on laboratory scale. We found that liquidity was dependent on thequantity of a heat dissociation part. And also we found that liquidity was dependent on the structureand quantity of the polyol which added in this process. In order to control a liquidity change in process,it was effective to reduce the ratio of the polyol having higher OH groups. By the examinationusing an extrusion machine, it was cleared to be able to apply a pressure-sensitive adhesive on a basematerial continuously. From these results, it was suggested by the new mechanism based on dissociationof a chemical bond that it is possible to produce a pressure sensitive adhesive sheet industrially.

The improvement of thermal stability of 3-glycidoxypropylmethyldimethoxysilane by the reaction with silica particle surface and polycondensation was investigated using thermogravimetric（TG） analysis. The temperature of 50％ weight loss for polycondensed silane was remarkably higher than that for monomeric silane. The TG curve for surface treated silica showed weight loss with three steps:100-150℃（1st step）, 150-250℃（2nd step）and 250-350℃（3rd step）. The weight loss in 1st step decreased, whereas those in 2nd and 3rd steps increased by heating of treated particles. The weight losses in three steps were based on the physically adsorbed monomeric silane（1st step）, the physically adsorbed polycondensed silane（2nd step）and the chemically adsorbed silane（3rd step）. The physically adsorbed percent in the silane treated layer measured from the TG curve for the treated silica without washing was almost equal to that measured from the comparison of weight losses for before and after acetone w ashing to remove the physically adsorbed molecules. It was clarified that the physically adsorbed percent can be measured from the TG curve for treated particles without washing.