Polyurethane hotmelt adhesives with reactive acrylic copolymers

Details Polyurethane hotmelt adhesives with reactive acrylic copolymers Polyurethane hotmelt adhesives with reactive acrylic copolymers

1997-09-08

1999-02-02

Niland, Patrick D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524507, 525127, 525455, C08J 300, C08K 300, C08L 7500, C08F 830

Patent

active

058666567

ABSTRACT:
A solvent-free one-part hot melt polyurethane adhesive or sealant composition which is solid at room temperature comprising 10 to 70% by weight of a urethane prepolymer having an isocyanate content of 0.25 to 15% and an isocyanate index greater than 1 and 30 to 90% by weight of an ethylenically unsaturated polymer having a number average molecular weight of 4,000 to 15,000 as determined by Gel Permeation Chromatography using a PL Gel,Mixed 10 micron column, a Shimadzu Model RID 6A Detector with a tetrahydrofuran carrier solvent at a flow rate of 1 milliliter per minute, the polymer containing sufficient hydroxyl functionality to provide an OH number of 5 to 15.

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Ex parte Grasselli et al., 231 VSPQ 293-295.

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