Patent EP0103996A2 successfully refreshed from Google Patents.
EP0103996A2
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EP
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Polyurea dispersions in organic isocyanates
Assignee: Imperial Chemical Industries Ltd
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Filing: 1983-08-23
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Granted: —
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Expires: 2003-08-23
Abstract
Abstract A dispersion of a polyurea in an aromatic polyisocyanate is prepared by mixing the polyisocyanate with one or more aliphatic diprimary diamines having (a) at least one amine group attached to a carbon atom having not more than one hydrogen atom attached thereto or (b) at least one amine group attached to a carbon atom which is itself attached to a carbon atom having not more than one hydrogen atom attached thereto, provided that both amine groups are not attached directly to separate rings of an alkylene-linked polycyclic aliphatic ring system. The reaction preferably takes place at a temperaure in the range 20°C to 60°C. The polyurea dispersion products are useful for manufacture of polyurethane foams and elastomers of superior physical properties.
Inventors
- 👤 Jeffrey Hughes
- 👤 John Hynds
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8038; C08G18/28; C08G18/30; C08G18/32; C08G18/3225; C08G18/3234; C08G18/708; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
A process for the manufacture of a dispersion in an aromatic polyisocyanate of a polyurea which comprises reacting by simple mixing the polyisocyanate with one or more aliphatic diprimary diamines having (a) at least one amine group attached to a carbon atom having not more than one hydrogen atom attached thereto or (b) at least one amine group attached to a carbon atom which is itself attached to a carbon atom having not more than one hydrogen atom attached thereto, provided that both amine groups are not attached directly to separate rings of an alkylene-linked polycyclic aliphatic ring system.
Claim 2
Dependent Claim
99 words
A process for the manufacture of a dispersion in an aromatic polyisocyanate of a polyurea which comprises reacting by simple mixing the polyisocyanate with one or more aliphatic diprimary diamines having (a) at least one amine group attached to a carbon atom having not more than one hydrogen atom attached thereto or (b) at least one amine group attached to a carbon atom which is itself attached to a carbon atom having not more than one hydrogen atom attached thereto, provided that both amine groups are not attached directly to separate rings of an alkylene-linked polycyclic aliphatic ring system.
Claim 3
Dependent Claim
69 words
A process according to claim 1 wherein the diamine has both amine groups attached either to a carbon atom having not more than one hydrogen atom attached thereto or to a carbon atom which is itself attached to a carbon atom having not more than one hydrogen atom attached thereto, provided that both amine groups are not attached directly to separate rings of an alkylene-linked poJycyclic aliphatic ring system.
Claim 4
Dependent Claim
22 words
A process according to claim 1 or claim 2 wherein the diamine is a diamine derivative of an aliphatic six membered ring.
Claim 5
Dependent Claim
16 words
A process according to claim 3 wherein the diamine is isophorone diamine, p-menthane diamine or 1,4-di(aminomethyl)cyclohexane.
Claim 6
Dependent Claim
15 words
A process according to claim 1 or 2 wherein the diamine is 3(4),8(9),-bis(aminomethyl)tricyclodecane or 2,2,4,4-tetramethyl-1,3-diaminocyclobutane.
Claim 7
Dependent Claim
24 words
A process according to any of the preceding claims wherein the aromatic polyisocyanate is tolylene diisocyanate or a diphenylmethane diisocyanate or a variant thereof.
Claim 8
Dependent Claim
19 words
A process according to any of the preceding claims wherein the reaction takes place at a temperature below 90°C
Claim 9
Dependent Claim
20 words
A process according to claim 7 wherein the reaction takes place at a temperature in the range 20"C to 60°C.
Claim 10
Dependent Claim
26 words
A process according to any of the preceding claims wherein the calculated polyurea content is not greater than 50% by weight of the total isocyanate composition.
Claim 11
Dependent Claim
22 words
A process according to claim 9 wherein the calculcated polyurea content is from 3 to 25X by weight ofthe total isocyanate composition
Claim 12
Dependent Claim
21 words
A dispersion of a polyurea in an aromatic isocyanate whenever prepared by a process according to any of the preceding claims.
Claim 13
Dependent Claim
36 words
A process for the manufacture of polyurethane elastomers which comprises reacting with a polyol a dispersion of a polyurea in an aromatic isocyanate whenever prepared by a process according to any of claims 1 to 10.
References Cited (Backward Citations)
No citation records indexed.
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