Reactive Hot-melt Adhesive Compositions with Improved Green Strength
Patent - This invention relates to urethane polymer compositions, particularly moisture-reactive hot-melt urethane polymer compositions useful as adhesives, to a method for making such compositions, and to a method for bonding substrates with such compositions. Some moisture-reactive hot-melt polymer compositions are useful as reactive hot-melt adhesives. Some desirable properties of such adhesives are high green strength, high ultimate strength, and long open time. Green strength is the bond strength prior to completion of the reaction with moisture; ultimate strength is the adhesive strength after the reaction with moisture is essentially complete; and open time is the period of time after the hot-melt adhesive is applied to one or more substrates, during which subsequent substrates may be contacted with the adhesive, without loss of ultimate strength. A moisture-reactive hot-melt composition, useful as an adhesive , is provided that has improved balance of open time and green strength. In particular, the composition is made from a polyol, a polyisocyante, and an acrylic polymer. Also provided are a method for making such compositions and a method for using such compositions for bonding substrates.
Source : EFB 11-03 01378531/EP-B1 NDN- 080-0343-0101-2 INVENTOR- Kesselmayer, Mark Alan 103 Green Bank Way Harleysville, Pennsylvania 19438 US CITATION INFORMATION- 5 827 926/US-A; 5 908 700/US-A PATENT ASSIGNEE- ROHM AND HAAS COMPANY 100 Independence Mall West Philadelphia, Pennsylvania 19106-2399 US PATENT NUMBER- 01378531/EP-B1 PATENT APPLICATION NUMBER- 03253832 DATE FILED- 2003-06-18 PUBLICATION DATE- 2011-01-19 PATENT PRIORITY INFORMATION- US, 60393602, 2002-07-03 FIRM- Kent, Venetia Katherine, Patent Outsourcing Limited 1 King Street, Bakewell Derbyshire DE45 1DZ, GB INTERNATIONAL PATENT CLASS- C08G01812; C09J16700 ; C08G01820; C08G01840; C08G01862; C08G01865; C08G01866; C09J13304 ; C09J17100 ; C09J17504 FILING LANGUAGE- English DESIGNATED COUNTRY- , DE, ES, FR, GB, IT LANGUAGE- English
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