US4137199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-retardant composition
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1975-07-07
•
Granted: 1979-01-30
•
Expires: 1995-07-07
Abstract
Abstract Composite materials composed of an organic polymer containing a fire-retardant together with a blowing agent and a hydroxy group-containing organic acid or a salt thereof, or a reaction product of the blowing agent and said acid or salt.
Inventors
- 👤 Geoffrey T. Brown
- 👤 John R. Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:15
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08K3/00; C08K3/32; C08K5/00; C08K5/04; C08K5/09; C08K5/16; C08K5/17; C08K5/49; C08K5/51; C08K5/52
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
72 words
A composite material comprising a mixture of an organic polymer, a phosphate fire retardant, and (i) a blowing agent and a hydroxy group-containing organic acid or salt thereof, said blowing agent being characterised as a compound which decomposes with evolution of a non-flammable gas when heated to a temperature in the range 150° C. to 400° C., or (ii) a reaction product of a blowing agent and said acid or salt thereof.
Claim 2
Dependent Claim
72 words
A composite material comprising a mixture of an organic polymer, a phosphate fire retardant, and (i) a blowing agent and a hydroxy group-containing organic acid or salt thereof, said blowing agent being characterised as a compound which decomposes with evolution of a non-flammable gas when heated to a temperature in the range 150° C. to 400° C., or (ii) a reaction product of a blowing agent and said acid or salt thereof.
Claim 3
Dependent Claim
22 words
A composite material as claimed in claim 1 in which the fire-retardant additive is an acid or is a source of acid.
Claim 4
Dependent Claim
42 words
A composite material as claimed in claim 1 characterised in that the phosphate is an inorganic oxide phosphate glass having a transformation temperature of not greater than 300° C. and containing at least 50 mole % of P 2 O 5 .
Claim 5
Dependent Claim
24 words
A composite material as claimed in claim 3 characterised in that the transformation temperature of the phosphate glass is not greater than 175° C.
Claim 6
Dependent Claim
69 words
A composite material as claimed in claim 3 characterised in that the phosphate glass has a mole % composition in the range P 2 O 5 50 to 72, B 2 O 3 1.2 to 3.5, PbO 0 to 30, one or more transition metal oxides 0 to 5 and one or more oxides selected from alkali metal oxides, alkaline earth metal oxides and zinc oxide 0 to 30.
Claim 7
Dependent Claim
45 words
A composite material as claimed in claim 5 characterised in that the phosphate glass has a mole % composition of P 2 O 5 66.1, B 2 O 3 2.3, Na 2 O 7.1, Li 2 O 7.1, MgO 2.4, CaO 2.4 and PbO 12.6.
Claim 8
Dependent Claim
23 words
A composite material as claimed in claim 1 characterised in that the blowing agent is a base containing at least one amino group.
Claim 9
Dependent Claim
16 words
A composite material as claimed in claim 7 characterised in that the blowing agent is melamine.
Claim 10
Dependent Claim
30 words
A composite material as claimed in claim 1 characterised in that there is present a hydroxy group-containing organic acid or a reaction product of said acid with a blowing agent.
Claim 11
Dependent Claim
22 words
A composite material as claimed in claim 8 characterised in that the hydroxy group-containing organic acid is tartaric acid or gluconic acid.
Claim 12
Dependent Claim
19 words
A composite material as claimed in claim 8 characterised in that the hydroxy group-containing organic acid is malic acid.
Claim 13
Dependent Claim
18 words
A composite material as claimed in claim 1 characterised in that the organic polymer is a thermosetting resin.
Claim 14
Dependent Claim
18 words
A composite material as claimed in claim 12 characterised in that the thermosetting resin is a polyurethane resin.
Claim 15
Dependent Claim
18 words
A composite material as claimed in claim 12 characterised in that the thermosetting resin is a polyester resin.
Claim 16
Dependent Claim
30 words
A cmposite material as claimed in claim 1 characterised in that the fireretardant additive is present in a proportion of from 20% to 60% by weight of the organic polymer.
Claim 17
Dependent Claim
53 words
A composite material as claimed in claim 1 characterised in that in total the blowing agent and the hydroxy group-containing acid, or salt thereof, or reaction product of said blowing agent with said acid or salt thereof, are present in a proportion of from 2% to 20% by weight of the organic polymer.
Claim 18
Dependent Claim
16 words
A composite material as claimed in claim 1 characterised in that the material contains fibrous reinforcement.
Claim 19
Dependent Claim
20 words
A composite material as claimed in claim 17 wherein said blowing agent is melamine and said acid is tartaric acid.
Claim 20
Dependent Claim
48 words
A composite material as claimed in claim 1 characterised in that the hydroxy group-containing organic acid has the structure HOOC(CHOH) n (CH 2 ) m R, where m is zero or an integer, n is an integer, and R is a hydroxy alkyl group or a carboxyl group.
Claim 21
Dependent Claim
79 words
A composite material as claimed in claim 1 characterized in that the mole proportion of blowing agent: hydroxy group-containing organic acid or salt thereof present in the composite material is in the range 3:1 to 1:3, or in that the blowing agent and hydroxy group-containing organic acid or salt thereof are present in the composite material as a reaction product of a mole proportion of blowing agent:hydroxy group-containing organic acid or salt thereof in the range 3:1 to 1:3.
References Cited (Backward Citations)
US2780606A
Cited
US3660321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |