US4644015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable polyol-melamine blend for use in the manufacture of fire retardant flexible urethane foam
Assignee: Ashland LLC
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Filing: 1986-05-08
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Granted: 1987-02-17
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Expires: 2006-05-08
Abstract
Abstract Blends of polyol and melamine for use in the manufacture of fire retardant polyurethane foams are stabilized by the addition of diethanolamine, ethanolamine, trihexylamine, or mixtures thereof.
Inventors
- 👤 Carl Scaccia
- 👤 Dennis H. Fisher
- 👤 Peter E. Throckmorton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3842; C08G18/3851; C08G18/65; C08G18/66; C08G18/6603; C08G18/6614; C08G18/6622
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
48 words
A storage stable suspension of a polyol, melamine and an amine compound for use in the synthesis of flame retardant polyurethane foams which suspension comprises; polyol, melamine and an effective stabilizing amount of an amine compound selected from the group consisting of diethanolamine, ethanolamine, trihexylamine, or mixtures thereof.
Claim 2
Dependent Claim
48 words
A storage stable suspension of a polyol, melamine and an amine compound for use in the synthesis of flame retardant polyurethane foams which suspension comprises; polyol, melamine and an effective stabilizing amount of an amine compound selected from the group consisting of diethanolamine, ethanolamine, trihexylamine, or mixtures thereof.
Claim 3
Dependent Claim
10 words
The storage stable suspension of claim 1 further comprising trichlorofluoromethane.
Claim 4
Dependent Claim
42 words
The storage stable suspension of claim 1 wherein to 100 parts polyol and from 20 to 120 parts melamine are added from 1 to 2 parts of an amine compound selected from the group consisting of diethanolamine, ethanolamine, trihexylamine, or mixtures thereof.
Claim 5
Dependent Claim
15 words
The storage stable suspension of claim 3 further comprising from 2 to 20 parts trichlorofluoromethane.
Claim 6
Dependent Claim
25 words
The storage stable suspension of claim 4 wherein said melamine contains from 7.9 to 64 percent fine melamine particles passing through a 325 mesh sieve.
Claim 7
Dependent Claim
13 words
The storage stable suspension of claim 4 wherein said amine compound is diethanolamine.
Claim 8
Dependent Claim
79 words
In a method of manufacturing fire retardant polyurethane foams wherein a first reaction stream containing polyol and melamine is combined with a second reaction stream containing polyisocyanate and foaming agent and a third reaction stream containing surfactant, reaction catalyst and water, the improvment which comprises the addition of an effective stabilizing amount of an amine compound selected from the group consisting of diethanolamine, ethanolamine, trihexylamine or mixtures thereof to said first reaction stream creating a stable polyol-melamine suspension stream.
Claim 9
Dependent Claim
79 words
In a method of manufacturing fire retardant polyurethane foams wherein a first reaction stream containing polyol and melamine is combined with a second reaction stream containing polyisocyanate and foaming agent and a third reaction stream containing surfactant, reaction catalyst and water, the improvment which comprises the addition of an effective stabilizing amount of an amine compound selected from the group consisting of diethanolamine, ethanolamine, trihexylamine or mixtures thereof to said first reaction stream creating a stable polyol-melamine suspension stream.
Claim 10
Dependent Claim
16 words
The method of claim 7 further comprising the addition of trichlorofluoromethane to said first reaction stream.
Claim 11
Dependent Claim
28 words
The method of claim 7 wherein to 100 parts polyol and from 20 to 120 parts melamine are added from 1 to 2 parts of said amine compound.
Claim 12
Dependent Claim
21 words
The method of claim 9 further comprising the addition of from 2 to 20 parts trichlorofluoromethane to said first reaction stream.
Claim 13
Dependent Claim
24 words
The method of claim 10 wherein from 7.9 to 64 percent of said melamine is fine melamine particles passing through a 325 mesh sieve.
Claim 14
Dependent Claim
11 words
the method of claim 11 wherein said amine compound is diethanolamine.
References Cited (Backward Citations)
US4221875A
Cited
US4385131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |