Imperial Chemical Industries Limited

Huntsman International LLC

Ici Americas, Inc.

Ici Americas Inc/imperial Chemical Industries Plc

Alain Parfondry

Herbert R Gillis

Jan Willem Leenslag

Jianming Yu

Malcolm P Hannaby

Edward F Cassidy

Eduard F Cassidy

Gabriel Verhelst

Louis Muller

Mireille B De Witte

Tu Pham

Arun Watts

Herbert R Gillis, Jr

Karen Maria Van Keer

A prepolymer process for preparing a high resilience flexible polyurethane foam by reacting a polyisocyanate composition comprising at least 80% by weight of 4,4&prime;-MDI and having an NCO value below 20% with a polyol composition comprising b1) an EO-rich polyol; b2) a polyol with an EO content between 20-50% and a primary hydroxy content of at least 50%; and b3) a polyol with an EO content between 10-20% and a primary hydroxy content of at least 50%; according to the following proportions: b1: 40-90 wt %, b2: 5-60 wt %, b3: 0-20 wt %. The invention also relates to reaction systems comprising the above components.

Process for making high resilience foams

Process for making free rise or slabstock flexible polyurethane foams with high resilience using diphenylmethane diisocyanate and a polyol composition comprising: (a) a polyoxyethylene-polyoxypropylene-polyol, having an average nominal hydroxyl functionality of 2-8, an average equivalent weight of 1000-4000 and containing 10-25% by weight of oxyethylene groups; (b) 3 to 8 parts by weight of water as the sole blowing agent or optionally together with CO as the sole blowing agents; and (c) 2 to 20, preferably 2 to 10 parts by weight of a polyether polyol having an average nominal hydroxyl functionality of 2-6, an average equivalent weight of 200-600 and containing at least 60% by weight of oxyethylene groups; and optionally (d) up to 30 and preferably 2-25 parts by weight of particulate material which is dispersed in said polyol composition; the amounts of (b)(ii) to (b)(iv) being calculated per 100 parts by weight of (b)(i); and optionally (e) auxiliaries and additives.

Process for preparing a free rise or slabstock flexible polyurethane foam

Process for making visco-elastic foams, polyols blend and reaction system useful therefor

The invention relates to a polyol composition comprising by weight 60-97% of b1) a polyoxyethylene-polyoxypropylene polyol, having a functionality of 2-6, with 10-25% tipped EO, 3-40% of b2) a polyoxyethylene-polyoxypropylene polyol, having a functionality of 2-6, with 20-50% total EO and 10-20% tipped EO; and 0-25% of b3) a polyol, having a functionality of 2-6, with at least 50% random EO. The invention also relates to a process for preparing a flexible polyurethane foam by reacting a) a polyisocyanate composition; b) a polyol composition of the invention; c) water; and d) additives and auxiliaries known per se. The invention finally relates to a reaction system comprising A) a polyisocyanate and B) an isocyanate-reactive component comprising the polyol of the invention.

Process for making low density foams, polyol composition and reaction system useful therefor

Process for preparing flexible polyurethane foam by reacting an MDI-based polyisocyanate and a polyether polyol with a &verbar;&Dgr;Hm&verbar; of at least 30 J/g and a Tm of 4&deg; C. and more.

Process for preparing a flexible polyurethane foam

The invention relates to a polyol composition comprising b1) a polyol where the EO content is at least 50%; b2) a polyol having a primary hydroxyl content of at least 50%; b3) an amine-initiated polyoxypropylene polyol having an OH value greater than 400, according to the following proportions: b1: 20-70 wt %, b2: 5-50 wt %, b3: 5-50 wt %. The invention also relates to a process for preparing a cold-setting flexible polyurethane foam at NCO index of 70-120 by reacting a) a polyisocyanate; the polyols b1), b2) and b3); c) water; and d) additives and auxiliaries known per se. The invention finally relates to a reaction system comprising A) a polyisocyanate and B) an isocyanate-reactive component comprising the polyols b1), b2) and b3).

Process for making cold-setting flexible foams, polyol composition and reaction system useful therefor, foams thus obtained

A continuous process for the preparation of an isocyanate-terminated prepolymer having an NCO content in the range from 2 to 15% by weight, said process comprising the steps of:

Chemical process

An isocyanate-reactive polymer comprising the reaction product of: (a) an isocyanate-terminated polyurethane prepolymer formed by reacting a polymeric polyol having a hydroxyl equivalent weight of at least 500 with a stoichiometric excess of an organic polyisocyanate, and (b) a stoichiometric excess, relative to the free isocyanate groups present in the prepolymer, of an imino-functional or enamine containing compound having a molecular weight less than about 750. The polymer is useful in reaction injection molding systems as an isocyanate-reactive ingredient.

Isocyanate reactive polymers having imino/enamine functionality

An internal mould release composition, suitable for use in the production of moulded articles by the RIM process, comprising:

Internal mould release compositions

A process for making integral skin foams which comprises reacting into a closed mould:

CO.sub.2 blown integral skin foams

The invention relates to a liquid isocyanate-containing prepolymer composition having an average isocyanate functionality greater than 2 and an NCO content of from 2 to 15% by weight, as obtainable by reacting an isocyanate reactive polymer having an average nominal functionality of from 2 to 6 with a stoichiometric excess of a diphenylmethane diisocyanate composition containing at least 2% by weight of 2,4'-diphenylmethane diisocyanate and having an average isocyanate functionality in the range from 2 to 2.3. The invention also relates to a method for preparing a polyurethane foam, which comprises reacting such a prepolymer composition with water.

Isocyanate composition and process for making flexible foams therefrom

Polyurethane/polyurea foams are made by reacting an organic polyisocyanate with resins containing imino/enamino-functional groups in the presence of blowing agents. Control of foam properties is offered by selecting imino/enamino-functional groups which decompose with water at the temperature of the reaction to produce volatile gases.

Polyurethane/urea foams employing imino/enamine functional compounds

An isocyanate-reactive polymer comprising the reaction product of:

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Alain Parfondry