Recticel

S.a. Prb

Prefoam Ag

'gechem'

Lucien Jourquin

Eddie R Du Prez

Rudi Mortelmans

Bernard Debaes

Guy Malfliet

Brian James Blackwell

Jacques Verwilst

Eddie DuPrez

Johannes A Derksen

Patrick Demeyer

A method and device for continuously producing slabstock polyurethane foam wherein a polymerizable reaction mixture containing a blowing agent is applied onto a moving conveyor and allowed a free rise expansion and polymerization within a substantially closed space. The pressure in this space is maintained within a predetermined pressure range by continuously supplying gas to the space, in addition to the blowing gas produced by the reaction and by simultaneously exhausting gas from said space. In this way, pressure fluctuations are reduced in the space and further parameters such as the temperature can be controlled so as to enable production of a foam with constant properties.

Method and device for the continuous manufacture of slabstock

Method for manufacturing self-supporting synthetic trim parts and thus

A method for preparing a light stable polyurethane, sprayable by means of a spray pistol, wherein use is made of an active hydrogen containing compound, wherein the functional groups consist for at least 50% of an active CH.sub.2 OH, NH and/or NH.sub.2 group, the functionality of which varies from 2 to 8 and the equivalent weight of which is comprised between 100 and 3500, together with 2 to 300 parts, per 100 parts of said compounds of a chain extender and/or a cross-linker, the functional groups of which are OH groups, at least 50% of which are primary OH groups, the equivalent weight of which is less than 100 and the functionality of which varies from 2 to 6, and with a catalytic system which comprises at least an organic lead, bismuth and/or tin (IV) compound and at least an amine initiator, having a functionality of 2 to 6, an equivalent weight lower than or equal to 200, and at least one aliphatic NH.sub.2 or NH group.

Method for preparing and applying a sprayable, light stable polyurethane

A method for the manufacture of flexible polyurethane foam of a density between 35 and 70 kg/m.sup.3 and having improved comfort properties, wherein a reaction mixture is composed containing at least a polyether polyol of equivalent weight between 1400 and 2800 and having a primary hydroxyl group content of more than 50%, an organic polyisocyanate, a catalyst and 0.5 to 1% by weight water with respect to the total foam weight and wherein, in order to allow the reaction mixture to expand up to said density by means of this limited amount of water and by means of up to 1.5 mole of a physical blowing agent per mole polyol, the reaction mixture is frothed mechanically and/or the reaction mixture is allowed to expand under a reduced pressure.

Method for the manufacture of flexible polyurethane foam

A device for at least partially encapsulating a border of a substantially sheet shaped element, and including a mould having at least two parts for pressing therebetween the element. The mould has a shape such that, when the element is pressed between the parts of the mould, a cavity is formed around the border. The device has an injection opening for injecting a moulding substance into the cavity. The cavity is formed by an elastically deformable member having a profile which extends along an encapsulation borderline of the element and which is adapted to be elastically deformed while maintaining a tight contact along the encapsulation borderline when pressure is applied thereon in order to follow irregularities in the element along the borderline. Also, a method for at least partially encapsulating a border of a substantially sheet shaped element.

Device and method for at least partially encapsulating a substantially

A method for preparing a flexible polyurethane foam, wherein a polyether-polyol having an average molecular weight from 1000 to 8000 and an average functionality not larger than 4, is brought into reaction with an organic polyisocyanate in the presence of a foam stabilizer, a catalyst and blowing agent comprising methylformate, wherein a cross-linker/extender and/or amine catalyst with delayed action is added to said reaction mixture.

Method for preparing a flexible polyurethane foam

A flexible highly elastical polyurethane foam having a density ranging between 25 and 150 kg/m.sup.3 and a relatively high fire resistance obtained by the reaction of an isocyanate and/or a chemically modified derivate thereof with a highly molecular reactive polyol in presence of a catalytic agent, of a cross-linker, and/or an extender, of water as blast means and of a fire retardant, characterized in that said fire retardant comprises at least one of the following components: (1) linear urea-formol oligomer mixture having the general formula NH.sub.2 --CO--NH--[CH.sub.2 --NH--CO--NH].sub.n --CH.sub.2 --NH--CO--NH.sub.2, wherein n can have the value from 0 to 50; (2) urea in powdered form of which the particles are at least partially recovered by a less soluble film, as well as sulfur as of a resin; (3) dicyandiamide having the general formula: ##STR1##

Flexible polyurethane foam having a high fire resistance

Method for preparing a shaped layer by gun spraying

An improved process for preparing integral skin polyurethane, wherein a reaction mixture comprising polyol, polyisocyanate the NCO groups of which are not directly bonded to an aromatic group, no more than 0.5 part by weight of water to 100 parts by weight of polyol, and a catalyst is reacted in a mould, said improvement consisting in using as catalyst a synergistic combination of at least one organic initiator, comprising at least one functional group of primary or secondary amines, with at least one organic compound of bismuth.

Process for preparing integral skin polyurethane and polyurethane so

A hydrophile polyurethane foam prepared from a hydrophile polyol, a polyisocyanate in which NCO groups are not directly bonded to an aromatic ring, a surface active agent, a swelling agent and a catalyst comprising:

Hydrophile polyurethane foam, process for preparing said foam and

A process for preparing polyurethane with integral skin, wherein a composition comprising following ingredients: polyol, polyisocyanate, at most one part by weight of water to 100 parts by weight of polyol and catalyst, is reacted in a mould so that a polyurethane is formed, characterized in that one uses a polyisocyanate the NCO groups of which are not directly bonded to an aromatic group and, as catalyst, at least one of the following four synergistic combinations:

Process for preparing polyurethane with integral skin

A process for preparing polyurethane foam which consists in introducing in the reaction, between a polyisocyanate and a polyol, a catalyst containing the chemical structure &gt;N--C=N-- and also a compound selected from the group comprising metal salts of carboxylic acids having the structure ##STR1## M and metal alcoholates and/or phenolates having the structure M'OR', wherein M' represents an alkaline metal, M represents an alkaline or alkaline-earth metal, R represents hydrogen or an organic radical and R' represents an organic radical.

Growing community of inventors

Wetteren, Belgium

Lucien Jourquin