MUMBAI, India, June 26 -- Intellectual Property India has published a patent application (202617026351 A) filed by Sika Technology AG on March 06, 2026, for Curable Compositions Containing Functional Polyesters And Aldimines.
Inventors include Scheurer, Rouven; Hberle, Hans; and Burckhardt, Urs.
The application for the patent was published on June 19, 2026, under issue no. 25/2026.
Abstract: The invention relates to a curable composition comprising: at least one polyester polymer A with ketoester groups of formula (I), having an average functionality of at least 2 and an average equivalent weight of at least 400 g/eq; at least one compound B with ketoester groups of formula (I) and an equivalent weight of 114 to 250 g/eq, where R is a monovalent hydrocarbon radical with 1 to 10 carbon atoms; and at least one aldimine L with aldimine groups of formula (II) and an aldimine equivalent weight of 110 to 350 g/eq, where Z is an aromatic or heteroaromatic five- or six-membered ring that is optionally substituted and/or fused and comprises a total of 4 to 25 carbon atoms, the weight ratio between compounds B and polyester polymers A being between 25/75 and 85/15, and the ratio between the number of ketoester groups of formula (I) and the number of aldimine groups of formula (II) being between 2 and 3. The composition is free from toxic ingredients, not sensitive to moisture, and cures under ambient conditions without emissions and unpleasant odours to form a tough-elastic polymer with high hardness, high tear resistance, and good extensibility. The composition is particularly suitable as a tough-elastic adhesive, sealant, or coating.
Disclaimer: Curated by HT Syndication.
