Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1994-04-08
2000-02-08
Sergent, Rabon
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
524 13, 524 14, 524 35, 528 67, 528 78, 528 85, 528 59, 528905, 560 25, 560 26, 560 33, 560330, 560359, 2521822, 25218222, C09J17504, C09J17508, C07C27128, C08G 1850
Patent
active
060224444
ABSTRACT:
Isocyanate prepolymers which are useful as binders are made from a polyisocyanate mixture and a hydroxyl compound having at least about 1 hydroxyl group. The polyisocyanate mixture is made up of from about 50 to about 60% by weight of polyphenyl polymethylene polyisocyanate and from about 40 to about 50% by weight of an isomeric mixture of diphenylmethane diisocyanate (MDI). The isomeric mixture of MDI is made up of from about 4 to about 30% by weight of the 2,4'-isomer and from about 70 to about 96% by weight of the 4,4'-isomer. The binders of the present invention are advantageous in that they may be used in high moisture, low temperature conditions without a catalyst. Reduced MDI emissions are also achieved when the binders of the present invention are used to make composite materials.
REFERENCES:
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James B. Wilson's--"Isocyanate Adhesives as Binders for Composition Board" which was presented at the symposium "Wood Adhesive-Research, Application and Needs" held in Madison, Wisconsin on Sep. 23-25, 1980.
Frink John W.
Haider Karl W.
Joseph Michael A.
Lawson Bonnie L.
Layton Heber D.
Bayer Corporation
Gil Joseph C.
Sergent Rabon
Whalen Lyndanne M.
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