compositions based on polyvinyl chloride plastisols containing a plasticizer, and in particular to the use of talc, ground airtight or protective coatings

摘要

The invention relates to a new formulation of the plastisol based on polyvinyl chloride (pvc) in suspension in a plasticizer. The process for the purpose of increasing the shear strength after baking of a plastisol of reference of the conventional type (comprising, in addition to the pvc and the plasticizer, the carbonate precipitate and a thickening agent), while preserving a threshold of running equivalent. It consists in replacing, in the reference composition, the carbonate precipitate or a fraction of that - with a percentage by weight of talc, and to reduce the proportion of plasticizer and increase the percentage of thickening agent, so as to correct the variation of the threshold of running induced by the above-mentioned carbonate / talc. The present invention makes it possible to limit or eliminate the carbonate precipitate which is expensive, while improving the resistance to shearing of the composition after cuisson.par.