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US4097455A
Expired / Lapsed
US
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Moulding compositions of mixtures of halogen-containing and halogen-free polyfunctional aromatic cyanic acid esters
Assignee: Bayer AG
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Filing: 1977-03-17
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Granted: 1978-06-27
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Expires: 1997-03-17
Abstract
Abstract Moulding compositions for the production of mouldings with fire-retarding properties and with a polytriazine structure, comprising mixtures of (A) 10 to 90% by weight of at least one polyfunctional, aromatic halogen-free cyanic acid ester or a prepolymer thereof which is still fusible or soluble in solvents, and (B) 10 to 90% by weight of at least one polyfunctional, aromatic halogen-containing cyanic acid ester or a prepolymer thereof which is still fusible or soluble in solvents.
Inventors
- 👤 Claus Burkhardt
- 👤 Karl-Heinrich Meyer
- 👤 Kurt Weirauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:47
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
Moulding compositions for the production of mouldings with fire-retarding properties comprising mixtures of (A) 10 to 90% by weight of at least one polyfunctional, aromatic halogen-free cyanic acid ester or a prepolymer thereof which is still fusible or soluble in solvents, and (B) 10 to 90% by weight of at least one polyfunctional, aromatic halogen-containing cyanic acid ester or a prepolymer thereof which is still fusible or soluble in solvents.
Claim 2
Dependent Claim
70 words
Moulding compositions for the production of mouldings with fire-retarding properties comprising mixtures of (A) 10 to 90% by weight of at least one polyfunctional, aromatic halogen-free cyanic acid ester or a prepolymer thereof which is still fusible or soluble in solvents, and (B) 10 to 90% by weight of at least one polyfunctional, aromatic halogen-containing cyanic acid ester or a prepolymer thereof which is still fusible or soluble in solvents.
Claim 3
Dependent Claim
107 words
Moulding compositions as claimed in claim 1, wherein component (A) consists of at least one cyanic acid ester corresponding to formula (I) or a prepolymer thereof which is still fusible or soluble in organic solvents: ##STR7## in which A represents a cyanate group, hydrogen, an alkyl group with from 1 to 4 carbon atoms, or methoxy carbonyl; B represents hydrogen, an alkyl group with from 1 to 4 carbon atoms, or methoxy carbonyl; n is the number 0 or 1; and X represents a single bond, a linear or branched alkyl radical with from 1 to 4 carbon atoms, cyclohexylene, --O--, --CO--, ##STR8## or --SO 2 --
Claim 4
Dependent Claim
13 words
Moulding compositions as claimed in claim 1, wherein component (A) consists of 2,2-bis-(4-cyanatophenyl)-propane.
Claim 5
Dependent Claim
55 words
Moulding compositions as claimed in claim 1, wherein component (B) consists of at least one cyanic acid ester corresponding to the formula: ##STR9## in which Y represents chlorine or bromine, and Z is a single bond, a linear or branched alkylene group with from 1 to 4 carbon atoms --O--, --CO-- or --SO 2 --.
Claim 6
Dependent Claim
34 words
Moulding compositions as claimed in claim 1, wherein component (B) represents at least one cyanic acid ester corresponding to formula (II) in which Y represents chlorine or bromine, and Z represents the radical ##STR10##
Claim 7
Dependent Claim
30 words
Moulding compositions as claimed in claim 1, wherein component (B) represents a cyanic acid ester corresponding to formula (II) in which Y represents bromine and Z represents the radical ##STR11##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |