US3915911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a flameproofing composition
Assignee: Dainichiseika Color and Chemicals Mfg Co Ltd
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Filing: 1974-06-03
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Granted: 1975-10-28
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Expires: 1994-06-03
Abstract
Abstract A flameproofing composition is prepared by co-melting a lignin compound with a urea compound.
Inventors
- 👤 Shojiro Horiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:24
CPC Classifications
C; C08; C08H; C08H6/00; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/32; C08K5/00; C08K5/16; C08K5/21; C08L; C08L101/00; C08L97/00; C09; C09D; C09D5/00; C09D5/18; C09K; C09K21/00; C09K21/06; C09K21/12; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/432; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07; D21H21/00; D21H21/14; D21H21/34; D21H5/00; D21H5/0002; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
THE PROCESS FOR PREPARING A FLAMEPROOFING COMPOSITION WHICH COMPRISES HEAT-MELTING A LIGNIN COMPOUND SELECTED FROM THE GROUP CONSISTING OF LIGNIN, LIGNIN, SULFONIC ACID AND A SALT OF LIGNIN SULFONIC ACID WITH A UREA COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA GUANAMINE, THIOUREA, LOWER ALKYLUREAS, LOWER ALKYLTHIOUREAS, METHYLOLUREA, BIURET AND INORGANIC ACID SALTS OF UREA.
Claim 2
Dependent Claim
55 words
THE PROCESS FOR PREPARING A FLAMEPROOFING COMPOSITION WHICH COMPRISES HEAT-MELTING A LIGNIN COMPOUND SELECTED FROM THE GROUP CONSISTING OF LIGNIN, LIGNIN, SULFONIC ACID AND A SALT OF LIGNIN SULFONIC ACID WITH A UREA COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA GUANAMINE, THIOUREA, LOWER ALKYLUREAS, LOWER ALKYLTHIOUREAS, METHYLOLUREA, BIURET AND INORGANIC ACID SALTS OF UREA.
Claim 3
Dependent Claim
36 words
The process for preparing a flameproofing composition of claim 1, wherein 0.3-10 parts by weight of the urea compound is co-melted with 1 part by weight of the lignin compound at a temperature higher than 130*C.
Claim 4
Dependent Claim
27 words
The process for preparing a flameproofing composition of claim 1, wherein 1-200% by weight of a thermoplastic or thermosetting resin is mixed with the comelted reaction mixture.
Claim 5
Dependent Claim
40 words
The process for preparing a flameproofing composition of claim 1, wherein phosphorous acid, hypophosphorous acid, phosphoric acid, metaphosphoric acid, polymetaphosphoric acid, polyphosphoric acid, phosphorous oxychloride or alkali or alkaline earth metal salts thereof is mixed with the co-melted reaction mixture.
Claim 6
Dependent Claim
23 words
The process for preparing a flameproofing composition of claim 1, wherein the flameproofing composition is treated with a water soluble polyvalent metal salt.
References Cited (Backward Citations)
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US3811992A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |