Claims
- 1. A curable composition comprising (i) an isocyanate-functional material; and (ii) a catalytically effective amount of a compound of the formula ##STR5## wherein R.sub.1 and R.sub.2 are independently straight chain, branched chain, or cyclic alkyl of one to about six carbon atoms, or R.sub.1 and R.sub.2 together form a straight chain or branched chain alkylene group having four or five carbons in the main alkylene chain, or R.sub.1 and R.sub.2 together form a group of the formula -A-O-B- or ##STR6## wherein A and B are independently straight chain or branched chain alkylene groups each having two carbon atoms in their main alkylene chain and R.sub.5 is alkyl, aryl, or a deactivating substituent; R.sub.3 is hydrogen or straight chain, branched chain, or cyclic alkyl of one to about six carbon atoms, or R.sub.1 and R.sub.3 together form a straight chain or branched chain alkylene group having three or four carbon atoms in the main alkylene chain, with the proviso that when R.sub.1 and R.sub.3 together form a straight chain or branched chain alkylene group having three or four carbon atoms in the main alkylene chain, then R.sub.2 is straight chain, branched chain, or cyclic alkyl of one to about six carbon atoms; and R.sub.4 is hydrogen, straight chain, branched chain, or cyclic alkyl of one to about six carbon atoms.
- 2. A curable composition according to claim 1, wherein the isocyanate-functional material is an isocyanate-functional prepolymer based on an aromatic isocyanate.
- 3. An article comprising a flexible sheet material coated with a composition according to claim 1.
- 4. An article according to claim 3 in the form of an orthopedic casting tape.
- 5. A catalysis method for catalysing the cure of an isocyanate-functional material comprising forming a mixture of:
- a) an isocyanate-functional material,
- b) water, and
- c) a catalytically effective amount of a compound of the formula ##STR7## wherein R.sub.1 and R.sub.2 are independently straight chain, branched chain, or cyclic alkyl of one to about six carbon atoms, or R.sub.1 and R.sub.2 together form a straight chain or branched chain alkylene group having four or five carbons in the main alkylene chain, or R.sub.1 and R.sub.2 together form a group of the formula -A-O-B- or ##STR8## wherein A and B are independently straight chain or branched chain alkylene groups each having two carbon atoms in their main alkylene chain and R.sub.5 is alkyl, aryl, or a deactivating substituent;
- R.sub.3 is hydrogen or straight chain, branched chain, or cyclic alkyl of one to about six carbon atoms, or R.sub.1 and R.sub.3 together form a straight chain or branched chain alkylene group having three or four carbon atoms in the main alkylene chain, with the proviso that when R.sub.1 and R.sub.3 together form a straight chain or branched chain alkylene group having three or four carbon atoms in the main alkylene chain, then R.sub.2 is straight chain, branched chain, or cyclic alkyl of one to about six carbon atoms; and R.sub.4 is hydrogen, straight chain, branched chain, or cyclic alkyl of one to about six carbon atoms.
- 6. A method according to claim 5, wherein the isocyanate-functional material is an isocyanate-functional prepolymer based on an aromatic isocyanate.
- 7. A method of orthopedic casting comprising the steps of:
- (i) providing a flexible sheet material coated with a composition according to claim 1;
- (ii) contacting the coated sheet material with water in order to initiate curing of the composition; and
- (iii) applying the coated sheet material to a body member of a subject.
Parent Case Info
This is a division of application Ser. No. 07/742,048 filed Aug. 8, 1991, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (4)
Number |
Date |
Country |
569284 |
Jan 1959 |
CAX |
0407056 |
Jan 1991 |
EPX |
3134592 |
Mar 1983 |
DEX |
2207949 |
Jun 1974 |
FRX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, 28 Jun. 1991 and JP-30 84 021 (Mitsui Toatsu) 9 Apr. 1991. |
Divisions (1)
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Number |
Date |
Country |
Parent |
742048 |
Aug 1991 |
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