US4031067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytriazines and a process for their production
Assignee: Bayer AG
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Filing: 1976-07-22
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Granted: 1977-06-21
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Expires: 1996-07-22
Abstract
Abstract Mixtures of aliphatic, cycloaliphatic or aromatic polyfunctional N-cyanosulfon amides and aromatic polyfunctional cyanic acid ester are converted at 30° to 150° C into fusible prepolymers or prepolymers soluble in organic solvents (polymeric N-organo-isourea ethers). Said prepolymers are highly stable in storage and react at 150° - 350° C to high molecular weight polymers of of triazine structure which are insoluble in solvents and infusible. The prepolymers may be used for the production of coatings or shaped articles or laminates.
Inventors
- 👤 Rudolf Sundermann
- 👤 Gunther Rottloff
- 👤 Ernst Grigat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:54
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A mixture which can be converted into a high molecular weight polymer of polytriazine structure which is substantially insoluble in solvents comprising I. 30 to 70 mol percent of an N-cyanosulphonamide corresponding to the formula A(SO.sub.2 --NH--CN).sub.n wherein A is an aliphatic, cycloaliphatic or aromatic polyvalent radical and n is a number from 2 to 5, Ii. 70 to 30 mol percent of an aromatic cyanic acid ester corresponding to the formula Ar(OCN).sub.m wherein Ar is an aromatic radical or an aromatic radical interrupted by bridge members, and m is a number from 2 to 5.
Claim 2
Dependent Claim
96 words
A mixture which can be converted into a high molecular weight polymer of polytriazine structure which is substantially insoluble in solvents comprising I. 30 to 70 mol percent of an N-cyanosulphonamide corresponding to the formula A(SO.sub.2 --NH--CN).sub.n wherein A is an aliphatic, cycloaliphatic or aromatic polyvalent radical and n is a number from 2 to 5, Ii. 70 to 30 mol percent of an aromatic cyanic acid ester corresponding to the formula Ar(OCN).sub.m wherein Ar is an aromatic radical or an aromatic radical interrupted by bridge members, and m is a number from 2 to 5.
Claim 3
Dependent Claim
144 words
A process for the production of a high molecular weight polymer of polytriazine structure which is substantially insoluble in solvents by poly-trimerization at elevated temperatures wherein from 30 to 70 mol percent of an N-cyanosulphonamide corresponding to the formula A(SO.sub.2 --NH--CN).sub.n wherein A is an aliphatic, cycloaliphatic or aromatic polyvalent radical and n is a number from 2 to 5, is reacted with a polyfunctional aromatic cyanic acid ester corresponding to the formula Ar(OCN).sub.m wherein Ar is an aromatic radical or an aromatic radical interrupted by bridge members and m is a number from 2 to 5, at elevated temperatures to form a prepolymer soluble in organic solvents or a fusible polymeric N-cyano-isourea ether prepolymer and the formed prepolymer is allowed to react to completion at elevated temperature to form a high molecular weight polymer of polytriazine structure which is substantially insoluble in solvents.
Claim 4
Dependent Claim
144 words
A process for the production of a high molecular weight polymer of polytriazine structure which is substantially insoluble in solvents by poly-trimerization at elevated temperatures wherein from 30 to 70 mol percent of an N-cyanosulphonamide corresponding to the formula A(SO.sub.2 --NH--CN).sub.n wherein A is an aliphatic, cycloaliphatic or aromatic polyvalent radical and n is a number from 2 to 5, is reacted with a polyfunctional aromatic cyanic acid ester corresponding to the formula Ar(OCN).sub.m wherein Ar is an aromatic radical or an aromatic radical interrupted by bridge members and m is a number from 2 to 5, at elevated temperatures to form a prepolymer soluble in organic solvents or a fusible polymeric N-cyano-isourea ether prepolymer and the formed prepolymer is allowed to react to completion at elevated temperature to form a high molecular weight polymer of polytriazine structure which is substantially insoluble in solvents.
References Cited (Backward Citations)
US3423333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |