Imperial Chemical Industries Limited

James P Brown

James M Bentley

David J Sparrow

Robert S Hampson

David Randall

Martin C Barker

William G Carroll

Ronald N May

Graham Gibbins

Guy Frijns

Anthony Cunningham

Viviane Gerrude Neyens

Ernst O Duber

Frederick T Kelly

Gian C Bagaglio

George W Ball

Erik M Merckx

Mark Loenders

Process for preparing lignocellulosic bodies by bringing lignocellulosic parts into contact with a composition comprising a polyisocyanate, fumed silica and a non-ionic liquid gellant and by pressing this combinations of parts and composition. The adhesion of the parts is excellent and the binder composition can be easily sprayed.

Process for preparing lignocellulosic bodies

Polyisocyanate composition comprising an organo clay and a cyclic alkylene carbonate. The composition is useful for wood-binding, preparing polyurethanes and rigid and flexible polyurethane foams.

Polyisocyanate composition

A dispersion in an aromatic polyisocyanate of a reaction product of the polyisocyanate and an amine having the formula: ##STR1## wherein Q represents hydrogen or hydrocarbyl and R represents a hydrocarbyl radical selected from radicals of the formulae: ##STR2## or wherein R and Q together with the attached nitrogen atom form a piperidine, morpholine or pyrolidine ring bearing a hydrocarbyl radical on at least one of the carbon atoms adjacent to the nitrogen atom.

Urea-modified isocyanates

The invention relates to a process for producing a polyurea or polyurea/polyurethane compound by reaction of an organic polyisocyanate with a diamine chain extender and an isocyanate-reactive polymer, the latter consisting at least in part, in a polymeric polyamine havng a molecular weight of from 1000 to 16000, containing from 2 to 4 primary amino groups per molecule, and being the condensation product of a polycarboxylic acid or ester with a stoichiometric excess of a polyamine having terminal propoxy groups and a molecular weight of from 500 to 5000.

Process for preparing polyurea and polyurea/polyurethane polymers from

The invention relates to a method for preparing microcellular polyurethane elastomer by reacting an organic isocyanate, a polyester polyol, a difunctional chain extender and a blowing agent, wherein at least a part of the polyester polyol used consists of a polyester polyol having a hydroxyl number between 28 and 112 and comprising units derived from aliphatic and/or aromatic dicarboxylic acids and from aliphatic, cycloaliphatic and/or heterocyclic glycols, as well as between 0.02 and 11 mole percent of units derived from monoalkanolamine with respect to the total amount of glycol and monoalkanolamine present in the polyester polyol.

Polyester polyols containing monoalkanolamine derived units

A polyester polyol derived from a polyalkoxylated by-product of pentaerythritol manufacture and polycarboxylic acids, the latter being themselves by-products from the production of adipic acid or terephthalic acid or derivatives thereof, useful for the manufacture of rigid foam.

Polyester polyols prepared by reacting a polyhydric alkoxylated

The invention relates to a polymeric polyamine having a molecular weight of from 1000 to 16000 and containing from 2 to 4 primary amino groups per molecule, the polymeric polyamine being the condensation product of a polycarboxylic acid or ester with a stoichiometric excess of a polyamine having terminal aminopropoxy groups and a molecular weight below 500.

Polymeric polyamines

This invention relates to polyether polyols having an average hydroxyl value in the range of 100 to 250 mgKOH/g, which are alkoxylated derivatives of a polyhydric alcohol being a mixture of compounds according to formula (I) or/and (II) ##STR1## wherein R.sup.1 is H, CH.sub.3 or OCH.sub.3,

Polyether polyols, their manufacture and use in polyurethanes production

A polyether polyol having an average hydroxyl value in the range 400 to 650 mgKOH/g which is a alkoxylated derivative of a polyhydric alcohol being itself a single compound or a mixture of compounds according to the general formula (I) ##STR1## where R.sup.1 is --H, --CH.sub.3 or OCH.sub.3

Polyether polyols containing hydroxymethyl substituted 1,3-dioxane for

An organic polyisocyanate composition contains from 99 to 60 parts by weight of a liquid organic polyisocyanate and from 1 to 40 parts of a 90:10 to 10:90 mixture of a wax and a liquid ester having a molecular weight of at least 250, for example an alkyl ester of an aliphatic carboxylic acid derived from an alkyl alcohol containing from 3 to 30 carbon atoms and a saturated or unsaturated fatty acid containing from 10 to 25 carbon atoms. The composition is useful for the manufacture of sheets or moulded bodies by the hot-pressing of a lignocellulosic material and promotes release of the material from the press. The composition is preferably applied in the form of an aqueous emulsion.

Wax dispersions and their use in the manufacture of sheets or moulded

Sheets or moulded bodies, for example particle board, are manufactured by hot pressing a lignocellulosic material in contact with an organic polyisocyanate and a wax release agent which is a vegetable wax, a modified vegetable oil, a microcrystalline wax or a mineral wax, said wax release agent having a melting point of at least 70.degree. C. Preferably the wax release agent is applied to the lignocellulosic material in the form of a dispersion in an aqueous emulsion of the polyisocyanate. The process facilitates the release of the sheets or moulded bodies from the caul plates or platens of the press.

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Sterrebeek, Belgium

James P Brown