Microcapsules having polyurea walls

   
   

The invention relates to microcapsules for which the walls comprise reaction products of polyisocyanates, guanidine compounds, and optionally amines, wherein the polyisocyanates have an isocyanurate content of at least 30% by weight, based on polyisocyanate, and the walls comprise on average less than 9% by weight, based on the total weight of the microcapsule.

A invenção relaciona-se aos microcapsules para que as paredes compreendem produtos da reação dos polyisocyanates, dos compostos do guanidine, e opcionalmente dos amines, wherein os polyisocyanates têm um índice do isocyanurate ao menos de 30% pelo peso, baseado no polyisocyanate, e as paredes compreendem na média menos de 9% pelo peso, baseados no peso total do microcapsule.

 
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