摘要:
The invention relates to a process for the production of a foam composite element, comprising the steps of providing a facing, applying adhesion promoter, and applying a foam layer comprising polyurethane and/or polyisocyanurate to the adhesion promoter, characterised in that the adhesion promoter consists of at least one compound selected from the group consisting of polyether polyol (B.1), polymer polyol (B.2), polyurea dispersion (B.3), polyester polyol (B.4) and PIPA polyol (B.5). The invention relates further to the use of at least one compound selected from the group consisting of polyether polyol, polymer polyol and polyurea dispersion as adhesion promoter in the production of foam composite elements, as well as to foam composite elements produced by the process according to the invention.
摘要:
The invention relates to a method for preparing a foam composite element, including the steps of preparing a top layer, applying an adhesion promoter layer to the top layer, wherein the adhesion promoter layer includes a modified isocyanate, and applying a foam layer including polyurethane and/or polyisocyanurate to the adhesion promoter layer. On application, the modified isocyanate in the adhesion promoter layer has a content of free isocyanate groups of from ≧10% to ≦29%. The invention further relates to the use of a modified isocyanate having a content of free isocyanate groups of ≧10% to ≦29% as an adhesion promoter in the preparation of foam composite elements and foam composite elements obtained by the method according to the invention.
摘要:
The invention relates to a process for the production of a foam composite element, comprising the steps of providing a facing, applying adhesion promoter, and applying a foam layer comprising polyurethane and/or polyisocyanurate to the adhesion promoter, characterized in that the adhesion promoter consists of at least one compound selected from the group consisting of polyether polyol (B.1), polymer polyol (B.2), polyurea dispersion (B.3), polyester polyol (B.4) and PIPA polyol (B.5). The invention relates further to the use of at least one compound selected from the group consisting of polyether polyol, polymer polyol and polyurea dispersion as adhesion promoter in the production of foam composite elements, as well as to foam composite elements produced by the process according to the invention.
摘要:
Polyester polyols are produced from at least one carboxylic acid hydride and diethylene glycol by a process in which the formation of 1,4-dioxane is suppressed. These polyester polyols are useful for producing polyurethane (PUR) and polyisocyanurate (PIR) foams and metal composite elements containing these PUR or PIR foams.
摘要:
Polyester polyols are produced from at least one carboxylic acid hydride and diethylene glycol by a process in which the formation of 1,4-dioxane is suppressed. These polyester polyols are useful for producing polyurethane (PUR) and polyisocyanurate (PIR) foams and metal composite elements containing these PUR or PIR foams.
摘要:
The present invention relates to a method for producing a polyester polyol having a concentration of ether groups in the range from 9.0 mol/kg of polyester polyol to 22 mol/kg polyester polyol, characterized in that (i) in a first step (A) isophthalic acid, optionally in the form of a C1-C4 alkyl ester, and/or terephthalic acid, optionally in the form of a C1-C4 alkyl ester, is reacted with (B) oligoethylene glycol of the formula H—(OCH2CH2)n—OH having a numerical average number of oxyethylene groups n in the range from 3.0 to 9.0, in the presence of at least one catalyst selected from the group made up of tin(II) salts, bismuth(II) salts, and titanium tetraalkoxylates, at a temperature in the range from 160° C. to 240° C., and at a pressure in the range from 1 to 1013 mbar, for a duration in the range from 7 to 100 hours, and (ii) in a second step the reaction mixture resulting from step (i) is reacted with (C) phthalic acid and/or phthalic acid hydride, the polyester polyols obtained according to said method, and to the use thereof for producing PUR/PIR hard foam materials
摘要:
An apparatus for the production of sandwich composite elements which includes at least two feed apparatus for facings, to which an application apparatus for an adhesion promoter, an application apparatus for a core layer, a conveying apparatus and a cutting apparatus are connected one after the other. The application apparatus for the adhesion promoter includes at least one feed line for the adhesion promoter, a rotary table with at least one lateral outlet orifice and a drive for the rotary table.
摘要:
The present invention relates to a method for producing a polyester polyol having a concentration of ether groups in the range from 9.0 mol/kg of polyester polyol to 22 mol/kg polyester polyol, characterized in that (i) in a first step (A) isophthalic acid, optionally in the form of a C1-C4 alkyl ester, and/or terephthalic acid, optionally in the form of a C1-C4 alkyl ester, is reacted with (B) oligoethylene glycol of the formula H—(OCH2CH2)n—OH having a numerical average number of oxyethylene groups n in the range from 3.0 to 9.0, in the presence of at least one catalyst selected from the group made up of tin(II) salts, bismuth(II) salts, and titanium tetraalkoxylates, at a temperature in the range from 160° C. to 240° C., and at a pressure in the range from 1 to 1013 mbar, for a duration in the range from 7 to 100 hours, and (ii) in a second step the reaction mixture resulting from step (i) is reacted with (C) phthalic acid and/or phthalic acid hydride, the polyester polyols obtained according to said method, and to the use thereof for producing PUR/PIR hard foam materials.
摘要:
The present invention relates to the production and use of polyester polyols produced from at least one aromatic dicarboxylic acid or an alkyl ester of an aromatic dicarboxylic acid or the anhydride of an aromatic dicarboxylic acid and at least one α,ω-diol, wherein the formation of 1,4-dioxane from diethylene glycol is largely suppressed by means of specific reaction management.
摘要:
An apparatus for the production of sandwich composite elements which includes at least two feed apparatus for facings, to which an application apparatus for an adhesion promoter, an application apparatus for a core layer, a conveying apparatus and a cutting apparatus are connected one after the other. The application apparatus for the adhesion promoter includes at least one feed line for the adhesion promoter, a rotary table with at least one lateral outlet orifice and a drive for the rotary table.