Microencapsulated polyaddition catalyst
AssigneeConstruction Research & Technology GmbH
InventorsHeimo Woelfle, Roland Hinrich Staff, Kristina Brandt, Francisco Javier Lopez-Villanueva
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Abstract
A microencapsulated polyaddition catalyst comprises a capsule core, containing polyaddition catalyst, and an acrylic copolymer capsule shell, the acrylic copolymer comprising copolymerized units of an intermolecular anhydride of an ethylenically unsaturated C3-C12 carboxylic acid. The polyaddition catalyst is selected from acyclic tertiary amines, alicyclic tertiary amines, N-alkylimidazoles, phosphines and organic metal salts. It is suitable for catalysing the reaction of a polyol compound with a polyisocyanate compound. The polyaddition catalyst is released by a chemical stimulus, such as on contact with polyols or water, for example.
Claims18
A microencapsulated polyaddition catalyst comprising a capsule core, containing the polyaddition catalyst, and an acrylic copolymer capsule shell, the acrylic copolymer comprising copolymerized units of an intermolecular anhydride of an ethylenically unsaturated C3-C12 carboxylic acid, and the polyaddition catalyst being selected from acyclic tertiary amines, alicyclic tertiary amines, N-alkylimidazoles, phosphines and organic metal salts.
A method of catalyzing the reaction of a polyol compound with a polyisocyanate compound with a microencapsulated polyaddition catalyst, the microencapsulated polyaddition catalyst comprising a capsule core, containing the polyaddition catalyst, and an acrylic copolymer capsule shell, the acrylic copolymer comprising copolymerized units of an intermolecular anhydride of an ethylenically unsaturated C3-C12 carboxylic acid, and the polyaddition catalyst being selected from acyclic tertiary amines, alicyclic tertiary amines, N-alkylimidazoles, phosphines and organic metal salts.
Dependencies are inferred from the claim text.