Abstract: Disclosed herein is a process for producing rigid polyisocyanurate foams, where (a) aromatic polyisocyanate, (b) isocyanate-reactive compounds including at least one polyetherol (b1) and/or polyesterol (b2), wherein where the number-average content of isocyanate-reactive hydrogen atoms of components (b 1) and (b2) is at least 1.7, (c) catalyst, (d) blowing agents, (e) flame retardants, (f) optionally auxiliary and additive substances and (g) optionally compounds having aliphatic hydrophobic groups and not falling under the definition of compounds (a) to (f) are mixed to afford a reaction mixture and allowed to cure to afford a rigid polyisocyanurate foam. Further disclosed herein is a rigid polyisocyanurate foam obtainable by the process.

Abstract: Described herein is a method for the preparation of a rigid polyisocyanate based foam, including mixing (a) polyisocyanate, (b) at least one compound having at least two hydrogen atoms reactive towards isocyanates, (c) optionally flame retardant, (d) blowing agent, (e) catalyst and (f) optionally further additives, to form a reaction mixture and reacting the reaction mixture to obtain the polyurethane based rigid foam where the compound reactive towards isocyanates (b) includes an aromatic polyetherpolyol (b2) and at least one compound selected from the group consisting of an aromatic polyesterpolyol (b1) and a polyetherpolyol (b3) different from polyether (b2). Also described herein is a rigid polyisocyanate based foam obtained from such a method and a polyol component for the production of a polyisocyanate based foam.

Abstract: The present disclosure relates to a method for producing rigid polyurethane foam composite elements, including at least one outer layer and a rigid polyurethane foam layer, by mixing (a) polyisocyanates with (b) compounds having at least two hydrogen atoms reactive with isocyanate groups, (c) optionally flame retardant(s), (d) blowing agent, (e) catalyst, and (f) optionally auxiliaries and adjuvants to form a reaction mixture, applying the reaction mixture to the outer layer, and curing it to form the rigid polyurethane foam. The present disclosure further relates to a rigid polyurethane foam composite element obtainable by such a method.

Abstract: Described herein is a process for producing composite elements comprising thermal insulation material (B), adhesive (C), and optionally at least one outer layer (A), where the thermal insulation material (B) is bonded with the adhesive (C). Also described herein are composite elements formed from thermal insulation material (B) and adhesive (C) and optionally at least one outer layer (A), producible by such a process. Also described herein is a method of using the adhesive (C) for the bonding of thermal insulation materials (B).

Abstract: The invention relates to an improved process for producing composite elements comprising at least one outer layer and at least one isocyanate-based rigid foam layer by means of a fixed applicator apparatus and in which the flowable starting material comprises the following components: A) at least one polyisocyanate, B) at least one compound which reacts with isocyanate groups to form urethane, C) at least one blowing agent, D) catalysts comprising at least one compound D1) which catalyzes isocyanurate formation and at least one compound D2) which catalyzes polyurethane formation, comprising at least one amino group, and E) optionally auxiliaries and additives, where the manner of use of component A) and of component B) is such that the isocyanate index is at least 180, and where the ratio by weight of the compound D2) to the compound D1) is from 0.75 to 8.

Abstract: The invention relates to rigid polyurethane foams obtainable by reaction of A) organic or modified organic polyisocyanates or mixtures thereof, B) compounds having two or more isocyanate-reactive hydrogen atoms in the presence of C) optionally further polyester polyols, D) optionally polyetherol polyols, E) optionally flame retardants, F) one or more blowing agents, G) catalysts, and H) optionally further auxiliaries and/or additives, wherein component B) comprises the reaction product of a1) 15 to 40 wt % of one or more polyols or polyamines having an average functionality of 2.5 to 8, a2) 2 to 30 wt % of one or more fatty acids and/or fatty acid monoesters, a3) 35 to 70 wt % of one or more alkylene oxides of 2 to 4 carbon atoms.

Abstract: A process for producing a rigid polyurethane foam by reacting an organic polyisocyanate with a polyol component containing a compound with at least two hydrogen atoms which are reactive toward isocyanate groups in the presence of a blowing agent, a catalyst, and optionally auxiliaries and additives, wherein the polyol component contains, by weight: 20 to 60 parts of a polyether alcohol having a functionality of 3.5 to 5.5 and a hydroxyl number of from 400 to 550 mg KOH/g; 1 to 20 parts of a polyether alcohol based on an aliphatic amine and having a functionality of 3.5 to 4.5 and a hydroxyl number of 450 to 900 mg KOH/g; 10 to 30 parts of a polyether alcohol and/or aromatic polyester alcohol having functionalities of 1.5 to 3 and a hydroxyl number of from 150 to 450 mg KOH/g; and optionally 1 to 5 parts of water.

Abstract: A process for producing rigid polyurethane foams, in which a mixture of one or more high-functionality polyether alcohols having functionalities of from 3.5 to 5.5 and a hydroxyl number of from 350 to 550 mg KOH/g, one or more polyether alcohols based on aliphatic and/or aromatic amines and having functionalities of from 3 to 4 and a hydroxyl number of from 150 to 800 mg KOH/g, an OH-comprising fatty acid ester and, if appropriate, one or more low molecular weight chain extenders and/or crosslinkers having functionalities of from 2 to 3 and a molecular weight Mw of <400 g/mol is used as polyol component, is described. The rigid polyurethane foams obtained have a good surface quality.

Abstract: The present invention relates to a process for producing composite elements comprising at least one rigid foam layer a) and at least one outer layer b), at least comprising: provision of a flowable starting material a*) and application of the flowable starting material a*) to the outer layer b) by means of a fixed application apparatus c) while the outer layer b) is moved continuously. The starting material a*) here comprises at least one polyisocyanate, at least one polyol, at least one blowing agent, a catalyst composition comprising at least one compound D1) selected from the group consisting of metal carboxylates and N,N?,N?-tris(dimethylaminopropyl)hexahydrotriazine, and at least one compound D2) which catalyzes polyurethane formation and which differs from the compound D1) and comprises at least one amino group, and optionally auxiliaries and additives.

Abstract: The invention relates to an improved process for producing composite elements comprising at least one outer layer and at least one isocyanate-based rigid foam layer by means of a fixed applicator apparatus and in which the flowable starting material comprises the following components: A) at least one polyisocyanate, B) at least one compound which reacts with isocyanate groups to form urethane, C) at least one blowing agent, D) catalysts comprising at least one compound D1) which catalyzes isocyanurate formation and at least one compound D2) which catalyzes polyurethane formation, comprising at least one amino group, and E) optionally auxiliaries and additives, where the manner of use of component A) and of component B) is such that the isocyanate index is at least 180, and where the ratio by weight of the compound D2) to the compound D1) is from 0.75 to 8.

Abstract: A process for producing rigid polyurethane foams or rigid polyisocyanurate foams is provided. The process contains the reaction of polyisocyanate, fatty acid modified polyetherpolyol, polyetherpolyol, optionally flame retardant, blowing agent, catalyst, and optionally further auxiliary and/or admixture agent, wherein the polyetherpolyol is obtained by a process containing reacting orthotolylenediamine and optionally further co-starters with alkylene oxide containing ethylene oxide wherein the ethylene oxide content is more than 20 wt %, and then reacting the reaction product with alkylene oxide containing propylene oxide wherein the 1,2-propylene oxide content is more than 20 wt %, in the presence of a catalyst.

Abstract: The invention relates to polyesterols obtainable by reaction of b1) from 10 to 70 mol % of at least one compound selected from the group consisting of terephthalic acid, dimethyl terephthalate, polyethylene terephthalate, phthalic anhydride, phthalic acid and isophthalic acid, b2) from 0.8 to 4.5 mol % of a fatty acid triglyceride, b3) from 10 to 70 mol % of a diol selected from the group consisting of ethylene glycol, diethylene glycol and polyethylene glycols, b4) from 5 to 50 mol % of a polyether polyol having a functionality above 2, wherein at least 200 mmol of component b4) are used per kg of the polyesterol, wherein the sum total of components b1) to b4) is 100 mol %.

Abstract: The invention relates to a process for producing rigid polyurethane foams by reaction of A) one or more organic polyisocyanates, B) one or more polyester polyols, C) optionally one or more polyether polyols, D) a flame-retardant mixture, E) further auxiliaries or addition agents, F) one or more blowing agents, and also G) catalysts, wherein said flame-retardant mixture D) comprises d1) 10 to 90 wt %, based on the amount of flame-retardant mixture, of a flame retardant having a boiling point of not more than 220° C., and d2) 10 to 90 wt %, based on the amount of flame-retardant mixture, of a phosphorus-containing flame retardant having a boiling point of above 220° C., wherein said components d1) and d2) total 100 wt %.

Abstract: The invention relates to a process for producing rigid polyurethane foams by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups in the presence of c) blowing agents, wherein the compounds b) having at least two hydrogen atoms which are reactive toward isocyanate groups comprise at least one aromatic polyester alcohol bi), at least one polyether alcohol bii) having a functionality of from 4 to 8 and a hydroxyl number in the range from 300 to 600 mg KOH/g.

Abstract: The invention relates to rigid polyurethane foams obtainable by reaction of A) organic or modified organic polyisocyanates or mixtures thereof, B) compounds having two or more isocyanate-reactive hydrogen atoms in the presence of C) optionally further polyester polyols, D) optionally polyetherol polyols, E) optionally flame retardants, F) one or more blowing agents, G) catalysts, and H) optionally further auxiliaries and/or additives, wherein component B) comprises the reaction product of a1) 15 to 40 wt % of one or more polyols or polyamines having an average functionality of 2.5 to 8, a2) 2 to 30 wt % of one or more fatty acids and/or fatty acid monoesters, a3) 35 to 70 wt % of one or more alkylene oxides of 2 to 4 carbon atoms.

Abstract: A process for producing a rigid polyurethane foam by reacting an organic polyisocyanate with a polyol component containing a compound with at least two hydrogen atoms which are reactive toward isocyanate groups in the presence of a blowing agent, a catalyst, and optionally auxiliaries and additives, wherein the polyol component contains, by weight: 20 to 60 parts of a polyether alcohol having a functionality of 3.5 to 5.5 and a hydroxyl number of from 400 to 550 mg KOH/g; 1 to 20 parts of a polyether alcohol based on an aliphatic amine and having a functionality of 3.5 to 4.5 and a hydroxyl number of 450 to 900 mg KOH/g; 10 to 30 parts of a polyether alcohol and/or aromatic polyester alcohol having functionalities of 1.5 to 3 and a hydroxyl number of from 150 to 450 mg KOH/g; and optionally 1 to 5 parts of water.

Abstract: A process for producing a rigid polyurethane foam by reacting (a) an organic polyisocyanate with (b) a compound having at least two hydrogen atoms that are reactive toward isocyanate groups, in the presence of (c) a blowing agent, (d) a catalyst and, optionally, (e) an auxiliary or additive. Component (b) contains: one or more high-functionality polyether alcohols having functionalities of 3.5 to 5.5 and a hydroxyl number of 400 to 550 mg KOH/g; one or more polyether alcohols based on aromatic and/or aliphatic amines and having functionalities of 3.5 to 4.5 and a hydroxyl number of 350 to 500 mg KOH/g; one or more polyether alcohols having functionalities of 2 to 4 and a hydroxyl number of 150 to 450 mg KOH/g; one or more low molecular weight chain extenders and/or crosslinkers having functionalities of 2 to 3 and a molecular weight of less than 400 g/mol; and optionally water.

Abstract: A process for producing rigid polyurethane foams, in which a mixture of one or more high-functionality polyether alcohols having functionalities of from 3.5 to 5.5 and a hydroxyl number of from 350 to 550 mg KOH/g, one or more polyether alcohols based on aliphatic and/or aromatic amines and having functionalities of from 3 to 4 and a hydroxyl number of from 150 to 800 mg KOH/g, an OH-comprising fatty acid ester and, if appropriate, one or more low molecular weight chain extenders and/or crosslinkers having functionalities of from 2 to 3 and a molecular weight Mw of <400 g/mol is used as polyol component, is described. The rigid polyurethane foams obtained have a good surface quality.

Abstract: The invention relates to a process for producing rigid polyurethane foams by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups in the presence of c) blowing agents, wherein the compounds b) having at least two hydrogen atoms which are reactive toward isocyanate groups comprise at least one aromatic polyester alcohol bi), at least one polyether alcohol bii) having a functionality of from 4 to 8 and a hydroxyl number in the range from 300 to 600 mg KOH/g.