Polyurethane-vinyl hybrid polymers, methods of making them and their use
AssigneeBASF SE
InventorsUlrike Licht, Dirk Wulff, Karl-Heinz Schumacher
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Abstract
Described are polyurethane-vinyl hybrid polymers, methods of making them and their use. The hybrid polymers are made from an anionic polyurethane and a polymerizable vinyl compound, wherein the polymerizable vinyl compound is selected from methylene malonates, methylene beta-ketoesters and methylene beta-diketones. The hybrid polymers can be used as binder in structural adhesives, as binder in pressure-sensitive adhesives, as binder in laminating adhesives, as binder in contact adhesives, as binder in ink, as binder in paints, as binder in coatings, as binder for fiber bonding, as binder for particle bonding or as binder in high cohesion adhesive tapes.
Claims16
A polyurethane-vinyl hybrid polymer comprising, in reacted form, at least one anionic polyurethane and at least one polymerizable vinyl compound, wherein the polymerizable vinyl compound is selected from the group consisting of methylene malonates, methylene beta-ketoesters and methylene beta-diketones;
- and wherein
- a) the polyurethane-vinyl hybrid polymer is formed by first coating a substrate with an aqueous anionic polyurethane dispersion and subsequently overcoating with the polymerizable vinyl compound wherein the ratio of anionic groups of the polyurethane to vinyl groups of the polymerizable vinyl compound is greater than 1:9;
- or
- b) wherein the polyurethane-vinyl hybrid polymer is formed in an aqueous dispersion.
A two-component composition comprising a first liquid composition and a second liquid composition, wherein the first liquid composition comprises at least one anionic polyurethane, and the second liquid composition comprises at least one polymerizable vinyl compound selected from the group consisting of methylene malonates, methylene beta-ketoesters and methylene beta-diketones.
A method of forming a polyurethane-vinyl hybrid polymer,
- comprising reacting at least one anionic polyurethane with at least one polymerizable vinyl compound selected from the group consisting of methylene malonates, methylene beta-ketoesters and methylene beta-diketones,
- wherein the reacting is performed in a liquid medium to form a one-component composition comprising at least one polyurethane-vinyl hybrid polymer;
- or comprising mixing a first liquid composition comprising the at least one anionic polyurethane and a second liquid composition comprising the at least one polymerizable vinyl compound to form a mixture, and subsequently applying the mixture to a substrate, wherein the formation of the polyurethane-vinyl hybrid polymer occurs at least partly after application to the substrate;
- or comprising forming the polyurethane-vinyl hybrid polymer by first coating a substrate with the at least one anionic polyurethane and subsequently overcoating the first coating with the at least one polymerizable vinyl compound with a molar ratio of the anionic groups of the polyurethane to the vinyl groups of the polymerizable vinyl compound of greater than 1:9.
A method of forming a laminate, comprising:
- (1) coating a polymer film with at least one anionic polyurethane;
- (2) storing the coated polymer film for at least 1 day;
- (3) overcoating the coated polymer film with at least one polymerizable vinyl compound,
- wherein the molar ratio of the anionic groups of the polyurethane to the vinyl groups of the polymerizable vinyl compound is greater than 1:9, and wherein the polymerizable vinyl compound is selected from the group consisting of methylene malonates, methylene beta-ketoesters and methylene beta-diketones;
- and
- wherein the polymerizable vinyl compound has at least two functional groups selected from the group consisting of a methylene malonate group, a methylene beta-ketoester group and a methylene beta-diketone group;
- and
- (4) laminating the overcoated polymer film to a substrate.
Dependencies are inferred from the claim text.