Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Reexamination Certificate
2003-10-29
2009-06-30
Sergent, Rabon (Department: 1796)
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
C252S182200, C252S182210, C528S067000, C528S073000, C544S067000, C544S222000, C560S336000, C560S359000, C560S360000, C564S044000, C564S045000
Reexamination Certificate
active
07553963
ABSTRACT:
This invention relates to storage-stable, liquid, partially trimerized and allophanized polyisocyanates having an NCO group content of 15 to 41% by weight, and comprising 5 to 85% by weight of toluene diisocyanate, 5 to 85% by weight of a polyisocyanate of the diphenyl-methane series and an organic compound or mixture thereof. The present invention also relates to a process for the preparation of the storage-stable, liquid, partially trimerized and allophanized polyisocyanates; to storage-stable, liquid urethane prepolymers of these partially trimerized and allophanized polyisocyanates; and to a process for the production of these storage-stable, liquid, urethane prepolymers.
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Oertel; Polyurethane Handbook, Chemistry—Raw Materials—Processing—Application—Properties, Second Edition; Hanser Publishers; New York; 1994; p. 90.
Kemp, II Hersel T.
Slack William E.
Bayer MaterialScience LLC
Cheung Noland J.
Sergent Rabon
Whalen Lyndanne M.
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