Method for forming an adhesive layer using hydrophilic polyurethanes related applications

US6806341B2 · kind B2 · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Herbert Fischer · Goldkronach, DE
• Winfried Emmerling · Neuss, DE
• Thomas Moeller · Goldkronach, DE
• Hermann Onusseit · Haan, DE
• Werner Haller · Erkrath, DE
• Bernhard Schoettmer · Monheim, DE
• Bernhard Herlfterkamp · Bottrop, DE
• Dieter Feustel · Monheim, DE
• Klaus Friedrich · Lake Forest, US
• Hartmut Buesching · Raddestorf, DE
• Norbert Huebner · Goldkronach, DE

Key dates

• Filing date: May 24, 2002
• Grant date: Oct 19, 2004
• Expiry date: May 24, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S528/905
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method of applying an adhesive to a substrate is disclosed which utilizes a hydrophilic, high molecular weight, nonionic polyurethane adhesive. The polyurethane adhesive is soluble in water and a 1% by weight solution of the adhesive in water at 20% has a specific viscosity of at least 0.4. The nonionic polyurethane contains the following structural units:a) —O—(CH2—CH2O)n where n is 8 to 500;b) —CO—NH—X—NHCO— where X is an aliphatic or cycloaliphatic group; andc) —O—Y—O— wherein Y comprises a hydrophobic moiety from the groups (—CH2—CH(CH3)—O)m—CH2—CH(CH3)—, (—CH2 CH(C2H5)—O)m—CH2—CH(C2H5)—, (—CH2—CH2—CH2—CH2 O)m—CH2 CH2 CH2 CH2—,alkylene groups having from 2 to 44 carbon atoms, cycloalkylene groups having from 6 to 44 carbon atoms and mixtures thereof