Isolierungspressling und Verfahren zu dessen Herstellung

Details

Veröffentlichungs-Nr.

EP2770003

Aktenzeichen

EP14156108

Anmeldetag

21. Februar 2014

Veröffentlichung

12. September 2018

Erteilung

12. September 2018

Rechtsraum

EP

IPC

C08G18/40B29B7/74B29C33/00B29C44/38B65D81/38C08J9/14C08G18/42C08G18/48F25D23/06

Abstract

The invention relates to a method for the manufacture of an insulation moulding, in particular of refrigerating appliances, in which the moulding is provided by filling a cavity between an inner and an outer wall of an open-box-shaped mould (M) with a polyurethane reaction mixture and allowing the polyurethane reaction mixture to cure to a polyurethane containing polymer C, the inner and outer wall being arranged in a fixed distance to one another and each wall comprising a bottom face (3) and a plurality of side faces (1, 2, 4, 5), whereas the polyurethane reaction mixture is fed through an inlet opening (I) positioned in the middle area of the bottom face (3) of the outer wall, wherein before filling the cavity, the mould (M) is turned with the bottom face of the outer wall downwards so that the polyurethane reaction mixture is foaming upwards to fill the cavity, whereas the method is characterized in that the polyurethane reaction mixture comprises an isocyanate component B which is reacted with an emulsion comprising (I) an isocyanate-reactive composition A, containing a polyol mixture Al consisting of at least three polyols A1a, Alb and A1c as the continuous phase and (II) at least one physical blowing agent T as the disperse phase, wherein: (i) A1a is a polyether polyol having a hydroxyl value from 15 mg KOH/g to 550 mg KOH/g and a functionality from 1.5 to 6.0, obtained by the addition of an epoxy to one or more starter compound(s) selected from the group consisting of carbohydrates and difunctional or higher-functional alcohols; (ii) Alb is a polyether polyol having a hydroxyl value from 100 mg KOH/g to 550 mg KOH/g and a functionality from 1.5 to 5.0, obtained by the addition of an epoxy to an aromatic amine; (iii) A1c is a polyester polyether polyol having a hydroxyl value from 100 mg KOH/g to 450 mg KOH/g and a functionality from 1.5 to 3.5, obtained by the addition of an epoxy to the esterification product of an aromatic dicarboxylic acid derivative and a difunctional or higher-functional alcohol. The invention further relates to an insulation moulding prepared by that process.

Anmelder

Firmen

Covestro Deutschland AG
Bayer MaterialScience AG

Land

🇩🇪 Deutschland

Fachgebiete