Patent US5476449A successfully refreshed from Google Patents.
EP0138546A2
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Intumescent composition
Assignee: Dixon International Ltd
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Filing: 1984-10-08
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Granted: —
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Expires: 2004-10-08
Abstract
Abstract An intumescent rubber or elastomeric composition comprises a rubber or elastomer containing: (a) one or more organic polyhydroxy compounds as carbonific; (b) one or more organic polyamido compounds in free and/or combined forms as spumific; (c) an ammonium phosphate as activator for the carbonific; and (d) an amino resin as binder; and, in addition to or instead of components (a) to (d), (e) sodium silicate as an intumescent material, components (a) to (d) if present being intermixed one with another.
Inventors
- 👤 Tessa Malcolm-Brown
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 17:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/31; C08K13/00; C08K13/02; C08K3/00; C08K3/32; C08K3/34; C08K5/0008; C08K5/0066; C08L; C08L21/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
80 words
An intumescent rubber or elastomeric composition comprising a rubber or elastomer containing: (a) one or more organic polyhydroxy compounds as carbonific; (b) one or more organic polyamido compounds in free and/or combined forms as spumific; (c) an ammonium phosphate as activator for the carbonific; and (d) an amino resin as binder; and, in addition to or instead of components (a) to (d), (e) sodium silicate as an intumescent material, components (a) to (d) if present being intermixed one with another.
Claim 2
Dependent Claim
80 words
An intumescent rubber or elastomeric composition comprising a rubber or elastomer containing: (a) one or more organic polyhydroxy compounds as carbonific; (b) one or more organic polyamido compounds in free and/or combined forms as spumific; (c) an ammonium phosphate as activator for the carbonific; and (d) an amino resin as binder; and, in addition to or instead of components (a) to (d), (e) sodium silicate as an intumescent material, components (a) to (d) if present being intermixed one with another.
Claim 3
Dependent Claim
23 words
An intumescent composition according to claim 1, wherein the carbonific comprises one or more compounds selected from mono-, di-and tri-pentaerythritols, sugars and starch.
Claim 4
Dependent Claim
15 words
An intumescent composition according to either preceding claim, wherein the spumific is dicyandiamide and/or guanidine.
Claim 5
Dependent Claim
15 words
An intumescent composition according to any preceding claim, wherein the activator is monoammonium dihydrogen phosphate.
Claim 6
Dependent Claim
18 words
An intumescent composition according to any preceding claim, wherein the amino resin is urea-formaldehyde resin or melamine-formaldehyde resin.
Claim 7
Dependent Claim
16 words
An intumescent composition according to any preceding claim, further comprising polyvinyl acetate as an additional binder.
Claim 8
Dependent Claim
35 words
An intumescent composition according to any preceding claim, wherein the rubber or elastomer has distributed therethrough particles individually comprising a mixture of two or more of the carbonific, spumific, activator, binder and/or said intumescent material.
Claim 9
Dependent Claim
33 words
An intumescent composition according to any of claims 1 to 7, wherein the rubber or elastomer has distributed therethrough particles separately comprising the carbonific, spumific, activator and binder and optionally said intumescent marerial.
Claim 10
Dependent Claim
20 words
An intumescent composition according to either of claims 7 and 8, wherein the particle size is less than 125 microns.
Claim 11
Dependent Claim
16 words
An intumescent composition according to claim 9, wherein the particle size is less than 75 microns.
Claim 12
Dependent Claim
22 words
An intumescent composition according to any preceding claim, wherein components (a) to (d) and/or (e) are distributed through the rubber or elastomer.
Claim 13
Dependent Claim
30 words
An intumescent composition according to any of claims 1 to 10, wherein components (a) to (d) and/or (e) are present in at least one region within the rubber or elastomer.
Claim 14
Dependent Claim
28 words
An intumescent composition according to any preceding claim, comprising a total of 2 to 50% by weight, based on the composition, of components (a) to (d) and/or (e).
Claim 15
Dependent Claim
26 words
An intumescent composition according to any preceding claim, comprising 0.41 to 1.23% by weight of said carbonific (a) based on the total weight of the composition.
Claim 16
Dependent Claim
22 words
An intumescent composition according to any preceding claim, comprising 1.04 to 3.10% by weight of said spumific (b) based on the composition.
Claim 17
Dependent Claim
22 words
An intumescent composition according to any preceding claim, comprising 2.18 to 6.54% by weight of said activator (c) based on the composition.
Claim 18
Dependent Claim
21 words
An intumescent composition according to any preceding claim, comprising 1.97 to 5.9% by weight of binder (d) based on the composition.
Claim 19
Dependent Claim
36 words
An intumescent composition according to any preceding claim, comprising, in addition to components (a) to (d), sodium silicate in an amount of 4.6 to 11.5% by weight based on the total of ingredients (a) to (d).
Claim 20
Dependent Claim
33 words
An intumescent composition according to any preceding claim, wherein components (a) to (d) are present and the amount of component (e) intermixed therewith does not exceed 30% by weight based on component (c).
References Cited (Backward Citations)
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