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|1. (WO2018162615) MICROENCAPSULATED POLYADDITION CATALYST|
|Applicants:||CONSTRUCTION RESEARCH & TECHNOLOGY GMBH
STAFF, Roland Hinrich
LOPEZ VILLANUEVA, Francisco Javier
|Title:||MICROENCAPSULATED POLYADDITION CATALYST|
A microencapsulated polyaddition catalyst comprises a capsule core containing a polyaddition catalyst and an acrylic copolymer as the capsule shell, the acrylic copolymer containing units of an intermolecular anhydride of an ethylenically unsaturated C3-C12 carboxylic acid polymerized into it. The polyaddition catalyst is selected from the group consisting of acyclic tertiary amines, alicyclic tertiary amines, N-alkyl imidazoles, phosphines and organic metal salts. It is suitable for catalyzing the reaction of a polyol compound with a polyisocyanate compound. The polyaddition catalyst is released by a chemical stimulus, e.g. upon contact with polyols or water.