Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1995-05-18
1997-01-21
Higel, Floyd D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
4273855, 528 68, 5483171, 560 34, 560160, C08G 3302, C08G 1832, C08G 1838, C07D23354
Patent
active
055960448
ABSTRACT:
The present invention relates to hydroxy-functional prepolymers containing urea groups and corresponding to the formula ##STR1## wherein R represents the residue obtained by removing the isocyanate groups from an organic monomeric diisocyanate, a polyisocyanate adduct or an NCO prepolymer containing hydantoin groups or hydantoin group precursors, R.sub.1 and R.sub.2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less, R.sub.3 and R.sub.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less, R.sub.5 represents the hydrocarbon radical obtained by removing the amino and hydroxyl groups from an amino alcohol, n has a value of 1 to 3 and m has a value of 2 to 6.
The present invention is also directed to compositions suitable for the production of coatings, adhesives or elastomers containing these polyhydantoin prepolymers in combination with optionally blocked polyisocyanates or aminoplast resins.
REFERENCES:
patent: 3549599 (1970-12-01), Merten, I
patent: 3639418 (1972-02-01), Merten, I
patent: 5126710 (1992-06-01), Zwiener et al.
Gindin Lyuba K.
Jonsson E. Haakan
Wicks Douglas A.
Yeske Philip E.
Bayer Corporation
Gil Joseph C.
Higel Floyd D.
Roy Thomas W.
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