EP0224979A1
Expired / Lapsed
EP
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Antistatic polyurethane foam
Assignee: PMC Inc
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Filing: 1986-06-26
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Granted: —
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Expires: 2006-06-26
Abstract
Abstract Flexible polyurethane foams having improved electrostatic properties are prepared by incorporating into the reaction mixture before foaming an antistatic additive composition comprising a blend of a quaternary ammonium compound selected from soya dimethyl-ethyl-ammonium-ethylsulphate, soya dimethyl-ethyl-ammonium-phosphate and mixtures thereof and a plasticiser selected from N-ethyl-o- and p-toluene-sulphonamides, o- and p-toluene-sulphonamides, and tetrakis (2-chloroethyl)-ethylene- diphosphate and mixtures thereof.
Inventors
- 👤 Michael P. Pcolinsky
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 23:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08K5/16; C08K5/17; C08K5/19; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
110 words
A method of preparation of a flexible polyurethane foam by reacting a foam-forming composition comprising a polyol and a polyisocyanate, characterised in that an antistatic composition, comprising 1 part by weight of a quaternary ammonium compound selected from soya dimethyl-ethyl-ammonium-ethylsulphate, soya dimethyl-ethyl-ammonium-ethylphosphate and mixtures thereof and 0.4 to 3 parts by weight of a plasticizer selected from N-ethyl-o- and p-toluene-sulphonamides, o- and p-toluene-sulphonamides, tetrakis(2-chloroethyl) l ethylene diphosphate and mixtures thereof, is added to the foam-forming composition in an amount in the range frop 5 to 25 parts by weight per 100 parts by weight of polyol, whereby the resultant foam has a reduced tendency to develop and accumulate electrostatic charges.
Claim 2
Independent Claim
110 words
A method of preparation of a flexible polyurethane foam by reacting a foam-forming composition comprising a polyol and a polyisocyanate, characterised in that an antistatic composition, comprising 1 part by weight of a quaternary ammonium compound selected from soya dimethyl-ethyl-ammonium-ethylsulphate, soya dimethyl-ethyl-ammonium-ethylphosphate and mixtures thereof and 0.4 to 3 parts by weight of a plasticizer selected from N-ethyl-o- and p-toluene-sulphonamides, o- and p-toluene-sulphonamides, tetrakis(2-chloroethyl) l ethylene diphosphate and mixtures thereof, is added to the foam-forming composition in an amount in the range frop 5 to 25 parts by weight per 100 parts by weight of polyol, whereby the resultant foam has a reduced tendency to develop and accumulate electrostatic charges.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein the antistatic composition comprises 1 part of quaternary ammonium compound and about 1½ parts of plasticiser.
Claim 4
Independent Claim
24 words
A method according to claim or 2, wherein the plasticiser is a liquid and the quaternary ammonium compound is dissolved in the liquid plasticiser.
Claim 5
Dependent Claim
27 words
A method according to claim 1, 2 or 3, wherein the quaternary ammonium compound is soya dimethyl-ethyl-ammonium-ethylsulphate and the plasticizer is a mixture of N-ethyl-o- and p-toluene-sulphonamides.
Claim 6
Independent Claim
20 words
A method according to any preceding claim, wherein the polyol is selected fran polyester polyols, polyether polyols and mixtures thereof.
Claim 7
Independent Claim
32 words
A method according to any of claims 1 to 4, wherein the polyol is a blend of a polyether polyol and a graft copolymer of polyether polyol and copolymerised styrene and acrylonitrile.
Claim 8
Independent Claim
25 words
A method according to any preceding claim, wherein the antistatic composition is prepared by mixing the quaternary ammonium compound and the plasticiser in the polyol.
Claim 9
Dependent Claim
55 words
An antistatic flexible polyurethane foam, characterised by containing an antistatic composition comprising 1 part by weight of a quaternary ammonium compound selected from soya dimethyl-ethyl-ammonium-ethylsulphate, soya dimethyl-ethyl-ammonium-ethylpolysul- phate and mixtures thereof in combination with 0.4 to 3 parts by weight of a plasticiser selected from N-ethyl-o- and p-toluene-sulphonamides, o- and p-toluene-sulphonamides, tetrakis(2-chloroethyl)-ethylene-diphosphate and mixtures thereof.
Claim 10
Dependent Claim
55 words
An antistatic flexible polyurethane foam, characterised by containing an antistatic composition comprising 1 part by weight of a quaternary ammonium compound selected from soya dimethyl-ethyl-ammonium-ethylsulphate, soya dimethyl-ethyl-ammonium-ethylpolysul- phate and mixtures thereof in combination with 0.4 to 3 parts by weight of a plasticiser selected from N-ethyl-o- and p-toluene-sulphonamides, o- and p-toluene-sulphonamides, tetrakis(2-chloroethyl)-ethylene-diphosphate and mixtures thereof.
Claim 11
Dependent Claim
30 words
An antistatic polyurethane foam according to claim 8, wherein the antistatic composition comprises 1 part of soya dimethyl-ethyl-ammonium-ethylsulphate dissolved in about 16 parts of a mixture of N-ethyl-o- and p-toluene-sulphonamides.
Claim 12
Dependent Claim
30 words
An antistatic polyurethane foam according to claim 8 or 9, which contains 5 to 25 parts by weight of the antistatic composition per 100 parts by weight of polyol (phr).
Claim 13
Dependent Claim
18 words
An antistatic polyurethane foam according to claim 10, which contains 15 to 20 phr of the antistatic composition.
Claim 14
Dependent Claim
17 words
An antistatic polyurethane foam according to claim 11, which contains about 18 phr of the antistatic composition.
Claim 15
Dependent Claim
61 words
An antistatic additive composition for in-situ use in the manufacture of a flexible polyurethane foam extending a reduced tendency to acquire and accumulate static charges, characterised by comprising a stable liquid mixture of a quaternary ammonium compound selected from soya dimethyl-ethyl-ammonium-ethylsulphate, soya dimethyl-ethyl-ammonium-ethylphosphate and mixtures thereof and a plasticiser selected from N-ethyl-o- and p-toluene-sulphonamides, o- and p-toluene-sulphonamides, tetrakis(2-chloroethyl)-ethylene-diphosphate and mixtures thereof.
Claim 16
Dependent Claim
61 words
An antistatic additive composition for in-situ use in the manufacture of a flexible polyurethane foam extending a reduced tendency to acquire and accumulate static charges, characterised by comprising a stable liquid mixture of a quaternary ammonium compound selected from soya dimethyl-ethyl-ammonium-ethylsulphate, soya dimethyl-ethyl-ammonium-ethylphosphate and mixtures thereof and a plasticiser selected from N-ethyl-o- and p-toluene-sulphonamides, o- and p-toluene-sulphonamides, tetrakis(2-chloroethyl)-ethylene-diphosphate and mixtures thereof.
Claim 17
Dependent Claim
29 words
An antistatic additive composition according to claim 13, which comprises 1 part by weight of the quaternary ammonium compound and 0.4 to 3 parts by weight of the plasticiser.
Claim 18
Dependent Claim
28 words
An antistatic additive composition according to claim 13 or 14, wherein the quaternary ammonium compound is soya dimethyl-ethyl-ammonium-ethylsulphate and the plasticiser is a mixture of N-ethyl-o- and p-toluene-sulphonamides.
Claim 19
Dependent Claim
36 words
An antistatic additive composition according to claim 15, which is prepared by heating the soya dimethyl-ethyl-ammonium-ethylsulphate to a temperature in the range from 50° to 65°C and additing it to the liquid N-ethyl-o- and p-toluene-sulphonamide mixture.
References Cited (Backward Citations)
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