US4219456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant agent solution of phosphoric acid containing condensate of guanidine and formaldehyde compatible with formaldehyde resin solutions
Assignee: Evonik Operations GmbH
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Filing: 1978-11-20
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Granted: 1980-08-26
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Expires: 1998-11-20
Abstract
Abstract A formaldehyde resin solution compatible fire retardant agent solution compatible with formaldehyde resin solutions is prepared consisting essentially of (a) 30 to 75 weight percent of a phosphoric acid containing condensation product of guanidine and formaldehyde in which the molar ratio A of phosphoric acid to guanidine is between 0.7:1 and 1.5:1 and the molar ratio B of formaldehyde to guanidine is between 1.0:1 and 4.0:1 and in which additionally the product of the two molar ratios A and B is from 1.0 to 6.0, and (b) 70 to 25 weight percent of a saturated, straight chain monohydric alcohol having 1 to 3 carbon atoms or a mixture of such an alcohol and up to 25 weight percent, based on the weight of component (b) of water.
Inventors
- 👤 Manfred Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:34
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/14; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08L; C08L61/00; C09K21/06; C09K21/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
A flame retardant agent solution compatible with a formaldehyde resin solution and consisting essentially of: (a) 30 to 75 weight percent of a phosphoric acid containing condensation product obtained by condensation under basic conditions with heating in the presence of a saturated straight chain monohydric alcohol having 1 to 3 carbon atoms of guanidine and formaldehyde in which the molar ratio A of phosphoric acid to guanidine is between 0.7:1 and 1.5:1 and the molar ration B of formaldehyde to guanidine is between 1.0:1 and 4.0:1 and in which additionally the product of the two molar ratios A and B is from 1.0 to 6.0, and (b) 70 to 25 weight percent of a saturated, straight chain monohydric alcohol having 1 to 3 carbons atoms or a mixture of such an alcohol and up to 25 weight percent, based on the weight of component (b) of water.
Claim 2
Dependent Claim
147 words
A flame retardant agent solution compatible with a formaldehyde resin solution and consisting essentially of: (a) 30 to 75 weight percent of a phosphoric acid containing condensation product obtained by condensation under basic conditions with heating in the presence of a saturated straight chain monohydric alcohol having 1 to 3 carbon atoms of guanidine and formaldehyde in which the molar ratio A of phosphoric acid to guanidine is between 0.7:1 and 1.5:1 and the molar ration B of formaldehyde to guanidine is between 1.0:1 and 4.0:1 and in which additionally the product of the two molar ratios A and B is from 1.0 to 6.0, and (b) 70 to 25 weight percent of a saturated, straight chain monohydric alcohol having 1 to 3 carbons atoms or a mixture of such an alcohol and up to 25 weight percent, based on the weight of component (b) of water.
Claim 3
Dependent Claim
13 words
A flame retardant solution according to claim 1 wherein the alcohol is methanol.
Claim 4
Dependent Claim
39 words
A flame retardant agent solution according to claim 1 wherein molar ratio A is from 0.75:1 to 1.1:1, molar ratio B is from 1.5:1 to 3.0:1 and the product of the two molar ratios is from 1.3 to 3.3.
Claim 5
Dependent Claim
23 words
A flame retardant composition according to claim 1 wherein the condensation product is 30 to 75% of the total flame retardant agent solution.
Claim 6
Dependent Claim
22 words
A flame retardant composition according to claim 4 wherein the condensation product is 40 to 60% of the total flame retardant composition.
Claim 7
Dependent Claim
16 words
A flame retardant agent composition comprising the product of claim 1 and a formaldehyde resin solution.
Claim 8
Dependent Claim
18 words
A flame retardant agent composition according to claim 6 wherein the formaldehyde resin is melamine-formaldehyde, urea-formaldehyde or phenol-formaldehyde.
Claim 9
Dependent Claim
17 words
A flame retardant agent composition according to claim 7 wherein the formaldehyde resin is a phenol-formaldehyde resin.
Claim 10
Dependent Claim
16 words
A flame retardant agent composition according to claim 7 wherein the phenol-formaldehyde resin is a novolak.
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) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |