Patent ID: 11873429
Assignee: BOSTIK SA
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 2:
3. The composition according to claim 1, wherein the polyurethane (a) comprising at least two end functional groups T of formula (I) is prepared by a process comprising the following stages:
E1) preparing a polyurethane comprising at least two NCO end functional groups by a polyaddition reaction:
i. of at least one polyisocyanate;
ii. with at least one polyol;, in amounts such that the NCO/OH molar ratio, denoted (r1), is strictly greater than 1; and
E2) reacting the product formed on conclusion of stage E1) with at least one hydroxylated ester of (meth)acrylic acid or at least one hydroxylated amide of (meth)acrylic acid, in amounts such that the OH/NCO molar ratio, denoted (r2), is less than or equal to 1.00.