Classifications

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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
  • C08G18/4804—Two or more polyethers of different physical or chemical nature
  • C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
  • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
  • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
  • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
  • C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/302—Water
• • C—CHEMISTRY; METALLURGY
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
  • C08G18/3203—Polyhydroxy compounds
  • C08G18/3206—Polyhydroxy compounds aliphatic
• • C—CHEMISTRY; METALLURGY
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  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
  • C08G18/3271—Hydroxyamines
  • C08G18/3278—Hydroxyamines containing at least three hydroxy groups
  • C08G18/3281—Hydroxyamines containing at least three hydroxy groups containing three hydroxy groups
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
  • C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
  • C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
  • C08G18/3823—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing -N-C=O groups
  • C08G18/3825—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing -N-C=O groups containing amide groups
• • C—CHEMISTRY; METALLURGY
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  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
  • C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
  • C08G18/3823—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing -N-C=O groups
  • C08G18/3834—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing -N-C=O groups containing hydrazide or semi-carbazide groups
• • C—CHEMISTRY; METALLURGY
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  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
  • C08G18/3819—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen
  • C08G18/3838—Low-molecular-weight compounds having heteroatoms other than oxygen having nitrogen containing cyano groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
  • C08G18/4833—Polyethers containing oxyethylene units
• • C—CHEMISTRY; METALLURGY
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  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
  • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
  • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
• • C—CHEMISTRY; METALLURGY
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  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
  • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
  • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
  • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
  • C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
  • C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
  • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
  • C08J9/125—Water, e.g. hydrated salts
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/315—Compounds containing carbon-to-nitrogen triple bonds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2110/00—Foam properties
  • C08G2110/0041—Foam properties having specified density
  • C08G2110/005—< 50kg/m3
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2110/00—Foam properties
  • C08G2110/0041—Foam properties having specified density
  • C08G2110/0058—≥50 and <150kg/m3
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2110/00—Foam properties
  • C08G2110/0041—Foam properties having specified density
  • C08G2110/0066—≥ 150kg/m3
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2203/00—Foams characterized by the expanding agent
  • C08J2203/10—Water or water-releasing compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
  • C08J2375/04—Polyurethanes
  • C08J2375/12—Polyurethanes from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group

Definitions

• Hydrazides such as acethydrazide have also been described as being suitable formaldehyde reducing additives (EP 1674515).
• Polyhydrazodicarbonamides which can be prepared from the reaction of hydrazine with isocyanates are also suitable for this purpose.
• these have the disadvantage of being present as particles and to make foams hard. This is not desirable with flexible foams.
• polyurea dispersions which are also suitable for reducing formaldehyde emissions from foams.
• the object of the present invention was to provide polyurethanes, preferably polyurethane foams, which have an even lower formaldehyde emission than polyurethanes or polyurethane foams of the prior art. This task could be solved with the following procedure:
• the present invention is a process for the preparation of polyurethanes, preferably polyurethane foams by reaction of compounds containing isocyanate-reactive hydrogen atoms with di- and / or polyisocyanates in the presence of one or more compounds selected from the group consisting of:
• R 1 to R 12 are each independently H, an optionally substituted C 1 -C 8 alkyl group or an optionally substituted aryl group,
• Y is a monovalent or divalent cation
• n stand for 1 or 2.
• the present invention also relates to the polyurethanes or polyurethane foams obtainable by the process described.
• the present invention particularly relates to a process for the preparation of polyurethanes, preferably polyurethane foams, in which
• A2 optionally with isocyanate-reactive hydrogen atoms containing compounds having an OH number according to DIN 53240 of> 260 to ⁇ 4000 mg KOH / g, A3 water and / or physical blowing agent,
• A4 possibly additives and additives like
• A5 one or more compounds selected from the group consisting of:
• R 1 to R 12 are each independently H, an optionally substituted G-Cg alkyl group or an optionally substituted aryl group,
• Y is a monovalent or divalent cation
• n 1 or 2
• the amount used of the component A5 according to the invention based on 1 kg of the components Al and B is 1 to 100 g, preferably 5 to 50 g (The statement 1 kg refers to the sum of Al and B).
• Very particularly preferred (alternative I) is a process for the preparation of polyurethanes, preferably polyurethane foams in the
• A3 0.5 to 24.5 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• AI and B (buzzer of AI and B) of one or more compounds selected from the group consisting of:
• R 1 to R 12 are each independently H, an optionally
• Ci-Cs alkyl group or an optionally substituted aryl group
• Y is a monovalent or divalent cation
• n 1 or 2
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• AI and B (buzzer of AI and B) of one or more compounds selected from the group consisting of:
• R 1 to R 12 are each independently H, an optionally
• Ci-Cs alkyl group or an optionally substituted aryl group
• Y is a monovalent or divalent cation
• n 1 or 2
• Another object of the invention is therefore the use of one or more compounds of formulas (I) to (IV) in polyurethane compositions or in processes for the preparation of polyurethanes, preferably polyurethane foams, for lowering the formaldehyde emission of the resulting polyurethanes, or polyurethane foams.
• isocyanate-based foams are known per se and e.g. in DE-A 1 694 142, DE-A 1 694 215 and DE-A 1 720 768 and in the Kunststoff-Handbuch Volume VII, Polyurethane, edited by Vieweg and Höchtlein, Carl Hanser Verlag Kunststoff 1966, as well as in the new edition of this book, edited by G. Oertel, Carl Hanser Verlag Kunststoff, Vienna 1993.
• Starting components according to component AI are compounds having at least two isocyanate-reactive hydrogen atoms having an OH number according to DIN 53240 of> 15 to ⁇ 260 mg KOH / g, preferably> 20 to ⁇ 150 mg KOH / g, more preferably> 20 to ⁇ 50 mg KOH / g, very particularly preferably> 25 to ⁇ 40 mg KOH / g.
• These include e.g. at least 2, usually 2 to 8, but preferably 2 to 6, hydroxyl-containing polyethers and polyesters and polycarbonates and polyester amides, as they are known per se for the preparation of homogeneous and cellular polyurethanes and as described, for. in EP-A 0 007 502, pages 8-15.
• At least two hydroxyl-containing polyethers and polyesters are preferred according to the invention. Particularly preferred are at least two hydroxyl-containing polyethers.
• the polyether polyols are prepared by known methods, preferably by base-catalyzed polyaddition of alkylene oxides to polyfunctional starter compounds containing active hydrogen atoms, such as, for example, alcohols or amines.
• Examples include: ethylene glycol, diethylene glycol, 1, 2-propylene glycol, 1, 4-butanediol, hexamethylene glycol, bisphenol A, trimethylolpropane, glycerol, pentaerythritol, sorbitol, cane sugar, degraded starch, Water, methylamine, ethylamine, propylamine, butylamine, aniline, benzylamine, o- and p-toluidine, oc, beta-naphthylamine, ammonia, ethylenediamine, propylenediamine, 1,4-butylenediamine, 1,2-, 1,3-, 1 , 4-, 1,5- and / or 1,6-hexam
• the alkylene oxides used are preferably ethylene oxide, propylene oxide, butylene oxide and mixtures thereof.
• the structure of the polyether chains by alkoxylation can be carried out only with a monomeric epoxide, but also carried out randomly or blockwise with two or three different monomeric epoxides.
• the polyaddition can, for example, also be DMC-catalyzed.
• DMC catalysts and their use for preparing polyether polyols are described, for example, in US Pat. Nos. 3,404,109, 3,829,505, 3,941,849, 5,158,922, 5,470,813, EP-A 700,949, EP-A 743,093 EP-A 761 708, WO-A 97/40086, WO-A 98/16310 and WO-A 00/47649.
• component AI comprises at least 30% by weight of at least one polyoxyalkylene polymer consisting of a starter, propylene oxide and optionally ethylene oxide and optionally an endblock of ethylene oxide, the total weight of the endblocks being on average 3-20% by weight. -%, preferably 5-15, more preferably 6-10 wt .-% based on the total weight of all polyoxyalkylene polymers.
• polyether carbonate polyols can be obtained, for example, by catalytic reaction of ethylene oxide and propylene oxide, optionally further alkylene oxides, and carbon dioxide in the presence of H-functional starter substances (cf. A 2046861).
• polyester polyols are also well known and e.g. described in the two abovementioned references ("Kunststoffhandbuch, Volume 7, Polyurethanes", “Reaction Polymers”).
• the polyester polyols are i.a. by polycondensation of polyfunctional carboxylic acids or their derivatives, e.g. Acid chlorides or anhydrides prepared with polyfunctional hydroxy compounds.
• polyfunctional carboxylic acids which may be used are: adipic acid, phthalic acid, isophthalic acid, terephthalic acid, oxalic acid, succinic acid, glutaric acid, azelaic acid, sebacic acid, fumaric acid or maleic acid.
• suitable polyfunctional hydroxyl compounds are: ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, dipropylene glycol,
• the preparation of the polyester polyols may also be carried out by ring-opening polymerization of lactones (e.g., caprolactone) with diols and / or triols as initiators.
• lactones e.g., caprolactone
• PHD polyols and PIPA polyols in component AI can be used as hydroxyl-containing compounds of component AI and polymer polyols.
• Polymer polyols are polyols which contain portions of free-radical-polymerization-capable monomers such as styrene or acrylonitrile in a base polyol-produced solid polymer.
• PHD (polyurea dipserion) polyols are prepared by in situ polymerization of an isocyanate or an isocyanate mixture with a diamine and / or hydrazine in a polyol, preferably a polyether polyol.
• the PHD dispersion is prepared by reacting an isocyanate mixture of 75 to 85 wt .-% 2,4-tolylene diisocyanate (2,4-TDI) and 15 to 25 wt .-% 2,6-tolylene diisocyanate (2.6 -TDI) with a diamine and / or hydrazine in a polyether polyol, preferably a polyether polyol prepared by alkoxylation of a trifunctional initiator (such as glycerol and / or trimethylolpropane).
• a trifunctional initiator such as glycerol and / or trimethylolpropane
• the PIPA polyols are polyisocyanate polyaddition with alkanolamine-modified polyether polyols, the polyether polyol having a functionality of 2.5 to 4 and a hydroxyl number of> 3 mg KOH / g to ⁇ 112 mg KOH / g (number average molecular weight 500 to 18000).
• PIPA polyols are described in detail in GB 2 072 204 A, DE 31 03 757 A1 and US Pat. No. 4,374,209.
• component A2 compounds having at least two isocyanate-reactive hydrogen atoms and an OH number according to DIN 53240 of> 260 to ⁇ 4000 mg KOH / g, preferably> 400 to ⁇ 3000 mg KOH / g, more preferably> 1000 to ⁇ 2000 mg KOH / g used.
• These compounds preferably have 2 to 8, more preferably 2 to 4, isocyanate-reactive hydrogen atoms.
• These may be, for example, low molecular weight diols (e.g., 1,2-ethanediol, 1,3- or 1,2-propanediol,
• 1,4-butanediol 1,4-butanediol
• triols eg glycerol, trimethylolpropane
• tetraols eg pentaerythritol
• hexaols eg sorbitol
• amino alcohols ethanolamine, diethanolamine, triethanolamine
• they may also be short-chain polyether polyols, polyether carbonate polyols, polyester polyols, polyester carbonate polyols, polythioether polyols, polyacrylate polyols or polycarbonate polyols.
• component A3 water and / or physical blowing agents are used.
• physical blowing agents for example, carbon dioxide and / or volatile organic substances are used as blowing agents.
• auxiliaries and additives are used as component A4.
• surfactants such as emulsifiers and foam stabilizers insbesodere those with low emissivity such as products of Tegostab ® LF series,
• reaction retarders e.g., acidic species such as hydrochloric acid or organic acid halides
• cell regulators such as paraffins or fatty alcohols or
• Dimethylpolysiloxanes Dimethylpolysiloxanes
• pigments dyes
• flame retardants such as tricresyl phosphate
• stabilizers against aging and weathering plasticizers
• fungistatic and bacteriostatic substances fillers (such as barium sulfate, diatomaceous earth, soot or whiting) and release agents.
• auxiliaries and additives are described, for example, in EP-A 0 000 389, pages 18 to 21. Further examples of auxiliaries and additives which may optionally be used according to the invention and details of the use and mode of action of these auxiliaries and additives are published in the Kunststoff-Handbuch, Volume VII, by G. Oertel, Carl Hanser Verlag, Kunststoff, 3rd edition, 1993 , eg on pages 104-127.
• aliphatic tertiary amines for example trimethylamine, tetramethylbutanediamine
• cycloaliphatic tertiary amines for example 1,4-diaza (2,2,2) bicyclooctane
• aliphatic aminoethers for example dimethylaminoethyl ether and N, N, N-trimethyl-N- hydroxyethyl bisaminoethyl ether
• cycloaliphatic aminoethers for example dimethylaminoethyl ether and N, N, N-trimethyl-N- hydroxyethyl bisaminoethyl ether
• urea (for example N-ethylmorpholine), aliphatic amidines, cycloaliphatic amidines, urea, Derivatives of urea (such as aminoalkyl ureas, see, for example, EP-A 0 176 013), in particular (3-dimethylaminopropylamine) urea) and tin catalysts (such as dibutyltin oxide, dibutyltin dilaurate, tin octoate).
• urea such as aminoalkyl ureas, see, for example, EP-A 0 176 013
• tin catalysts such as dibutyltin oxide, dibutyltin dilaurate, tin octoate.
• Particularly preferred catalysts are a) urea, derivatives of urea and / or b) the abovementioned amines and aminoethers, characterized in that the amines and aminoethers contain a functional group which reacts chemically with the isocyanate.
• the functional group is a hydroxyl group, a primary or secondary amino group.
• catalysts are: (3-dimethylaminopropylamine) urea, 1, l '- ((3- (dimethylamino) propyl) imino) bis-2-propanol, N- [2- [2- (dimethylamino) ethoxy] ethyl] -N-methyl-1,3-propanediamine and 3-dimethylaminopropylamine.
• Component A5 comprises compounds selected from the group consisting of:
• R 1 to R 12 are each independently H, an optionally substituted C 1 -C 8 alkyl group or an optionally substituted aryl group,
• Y is a monovalent or divalent cation
• n stand for 1 or 2.
• radicals R 1 to R 12 are each independently of one another H or a G-C 6 alkyl group.
• the radicals R 1, R 2, R 4 and R 5 independently of one another are H, the radicals R 3 and R 6 to R 12 independently of one another are H or a G-C 6 alkyl group.
• component B aliphatic, cycloaliphatic, araliphatic, aromatic and heterocyclic polyisocyanates are used, as they are e.g. by W. Siefken in Justus Liebigs Annalen der Chemie, 562, pages 75 to 136, for example those of the formula (V)
• n 2 - 4, preferably 2 -3,
• Q is an aliphatic hydrocarbon radical having 2 to 18, preferably 6 to 10 C atoms, a cycloaliphatic hydrocarbon radical having 4 to 15, preferably 6 to 13 C atoms or an araliphatic hydrocarbon radical having 8 to 15, preferably 8 to 13, C atoms.
• polyisocyanates as described in EP-A 0 007 502, pages 7-8.
• Particularly preferred are generally the technically readily available polyisocyanates, e.g. the 2,4- and 2,6-toluene diisocyanate, as well as any mixtures of these isomers ("TDI”); polyphenyl polymethylene polyisocyanates, as prepared by aniline-formaldehyde condensation and subsequent phosgenation (“crude MDI”) and carbodiimide groups, urethane groups, allophanate groups , Isocyanurate groups, urea groups or biuret polyisocanates ("modified polyisocyanates”), especially those modified polyisocyanates derived from 2,4- and / or 2,6-toluene diisocyanate or from 4,4'- and / or 2,4 '
• component B at least one compound selected from the group consisting of 2,4- and 2,6-toluene diisocyan
• component B a diphenylmethane diisocyanate mixture consisting of
• Multi-core MDI Polyphenylpolymethylenpolyisocyanat
• 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate and / or pMDI-based carbodiimides, uretdiones or Uretdionimine.
• the component B used is a diphenylmethane diisocyanate mixture consisting of a) 35 to 45 wt .-% of 4,4'-diphenylmethane diisocyanate and
• multinuclear MDI polyphenylpolymethylene polyisocyanate
• 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate-, and / or pMDI-based carbodiimides from 50 to 64% by weight of polyphenylpolymethylene polyisocyanate ("multinuclear MDI") and / or 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate-, and / or pMDI-based carbodiimides
• reaction components are reacted according to the conventional one-step process, the prepolymer process or the semi-prepolymer process, often using mechanical equipment, e.g. those described in EP-A 355 000. Details of processing means which are also contemplated by this invention are described in the Kunststoff-Handbuch, Volume VII, edited by Vieweg and Hochtlen, Carl-Hanser-Verlag, Kunststoff 1993, e.g. on pages 139 to 265.
• the polyurethane foams can be produced as molded or also as block foams.
• the molded foams can be produced hot or cold-curing.
• the invention therefore relates to a process for the preparation of the polyurethane foams, the polyurethane foams produced by this process and their use for the production of molded parts or block products, as well as the molded parts or the block product itself.
• the polyurethane foams obtainable according to the invention find, for example, the following application: furniture upholstery, Textile inserts, mattresses, automobile seats, headrests, armrests, sponges and components, as well as seat and armature panels, and have indexes of 70 to 130, preferably 80 to 120 and room weights of 4 to 600 kg / m 3 , preferably 60 to 120 kg / m 3 (flexible foam) or preferably 15 to 55 kg / m 3 (semi-rigid foam) on.
• the index gives the percentage ratio of the actual amount of isocyanate used to the stoichiometric, i. calculated isocyanate groups (NCO) amount:
• Ratio [(amount of isocyanate used): (calculated amount of isocyanate)] ⁇ 100 (VI)
• the invention relates to a process for preparing polyurethanes by reacting isocyanate-reactive hydrogen atoms having compounds with di- and / or polyisocyanates in the presence of one or more compounds selected from the group consisting of:
• R 1 to R 12 each independently represent H, an optionally substituted G-Cg alkyl group or an optionally substituted one
• Y is a monovalent or divalent cation
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams, in which
• A2 optionally with isocyanate-reactive hydrogen atoms containing compounds having an OH number according to DIN 53240 Datumvon> 260 to ⁇ 4000 mg
• A4 possibly additives and additives like
• A5 one or more compounds selected from the group consisting of:
• R 1 to R 12 each independently represent H, an optionally substituted G-Cg alkyl group or an optionally substituted one
• Y is a monovalent or divalent cation, and m stands for 1 or 2,
• the invention relates to a method according to embodiment 1 or 2, wherein
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 2 or 3 in which
• A3 0.5 to 24.5 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 to R 12 are each independently H, an optionally substituted G-Cg alkyl group or an optionally substituted aryl group,
• Y is a monovalent or divalent cation
• n 1 or 2
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 2 or 3 in which
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 to R 12 are each independently H, an optionally substituted G-Cg alkyl group or an optionally substituted aryl group,
• Y is a monovalent or divalent cation
• n 1 or 2
• the invention relates to the use of one or more compounds selected from the group consisting of:
• R 1 to R 12 are each independently H, an optionally
• Ci-Cs alkyl group or an optionally substituted aryl group
• Y is a monovalent or divalent cation
• n 1 or 2
• polyurethane foams for lowering the formaldehyde emission of the resulting polyurethanes, or polyurethane foams.
• the invention relates to a method or use according to any one of embodiments 1 to 6, wherein in the compounds (I) to (IV) Rl to R 12 are each independently H or a Ci-Ce alkyl group.
• the invention relates to a method or use according to embodiment 7, wherein R 1, R 2, R 4 and R 5 are independently H.
• the invention relates to a process according to any one of embodiments 1 to 5, 7 or 8, wherein as isocyanate-reactive hydrogen-containing compounds (component AI) at least two hydroxyl-containing polyether, optionally in admixture with at least two hydroxyl groups containing polyesters are used.
• the invention relates to a process according to any one of embodiments 1 to 5, 7 to 9, wherein the component consisting of isocyanate-reactive hydrogen-containing compounds (component AI), at least 30 wt .-% of at least one polyoxyalkylene Copolymer, consisting of a starter, propylene oxide and ethylene oxide and an endblock of ethylene oxide, wherein the total weight of the end blocks of EO on average from 3 to 20 wt .-%, preferably 5-15, particularly preferably 6-10 wt .-% based on the total weight of all polyoxyalkylene copolymers.
• component AI isocyanate-reactive hydrogen-containing compounds
• the invention relates to a method according to any one of embodiments 1 to 5 or 7 to 10, wherein as di- and / or polyisocyanate component (component B) a diphenylmethane diisocyanate mixture consisting of
• Multi-core MDI Polyphenylpolymethylenpolyisocyanat
• 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate and / or pMDI-based carbodiimides, uretdiones or Uretdionimine
• the invention relates to a method according to any one of embodiments 1 to 5 or 7 to 10, wherein as di- and / or polyisocyanate component (component B) a diphenylmethane diisocyanate mixture consisting of a) 35 to 45 wt .-% 4,4'-diphenylmethane diisocyanate and
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 4, 9 or 10 in which
• AI to A4 water and / or physical blowing agents
• auxiliaries and additives such as
• R 1 to R 12 are each independently H, an optionally substituted G-Cg alkyl group or an optionally substituted aryl group,
• Y is a monovalent or divalent cation
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 4, 9 or 10 in which
• AI to A4 water and / or physical blowing agents
• auxiliaries and additives such as
• R 1 to R 12 are each independently H or G-C ⁇
• Y is a monovalent or divalent cation
• n 1 or 2
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 4, 9 or 10 in which
• AI 75 to 99.0 parts by weight against isocyanate-reactive hydrogen atoms compounds having an OH number according to DIN 53240 of> 20 to ⁇ 150 mg KOH / g .
• A2 0 to 10 parts by weight (based on the sum of the parts by weight of components AI to A4) of compounds having isocyanate-reactive hydrogen atoms with an OH number according to DIN 53240 of> 260 to ⁇ 4000 mg KOH / g,
• AI to A4 water and / or physical blowing agents
• auxiliaries and additives such as
• R 1 , R 2 , R 4 and R 5 are each independently H and R 3 and R 6 to
• R 12 are each independently H or a CI-C ⁇ alkyl group, Y is a monovalent or divalent cation, and
• n 1 or 2
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 4, 9 or 10 in the
• AI 75 to 99.0 parts by weight against isocyanate-reactive hydrogen atoms compounds having an OH number according to DIN 53240 of> 20 to ⁇ 150 mg KOH / g .
• A2 0 to 10 parts by weight (based on the sum of the parts by weight of components AI to A4) of compounds having isocyanate-reactive hydrogen atoms with an OH number according to DIN 53240 of> 260 to ⁇ 4000 mg KOH / g,
• AI to A4 water and / or physical blowing agents
• auxiliaries and additives such as
• R 1 to R 12 are each independently H or a CI-C ⁇
• Y is a monovalent or divalent cation
• n 1 or 2
• Multi-core MDI Polyphenylpolymethylenpolyisocyanat
• 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate and / or pMDI-based carbodiimides, uretdiones or Uretdionimine.
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 4, 9 or 10 in the
• AI 75 to 99.0 parts by weight (based on the sum of parts by weight of the components
• AI to A4 with respect to isocyanate-reactive hydrogen atoms containing compounds having an OH number according to DIN 53240 of> 20 to ⁇ 150 mg KOH / g, A2 0 to 10 parts by weight (based on the sum of parts by weight of components AI to A4) with respect to isocyanate-reactive hydrogen atoms containing compounds having an OH number according to DIN 53240 of> 260 to
• AI to A4 water and / or physical blowing agents
• auxiliaries and additives such as
• X for NR 6 R 7 , OR 8 , CONR 9 R 10 or COOR 11 , R 1 to R 12 are each independently H or G-C ⁇
• Y is a monovalent or divalent cation
• n 1 or 2
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 4, 9 or 10 in which
• A3 0.5 to 24.5 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 , R 2 , R 4 and R 5 are each independently H and R 3 and R 6 to R 12 are each independently H or a CI-C 6 alkyl group, Y is a monovalent or divalent cation, and
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 4, 9 or 10 in which
• AI 75 to 99.0 parts by weight against isocyanate-reactive hydrogen atoms compounds having an OH number according to DIN 53240 of> 20 to ⁇ 150 mg KOH / g .
• A2 0 to 10 parts by weight (based on the sum of the parts by weight of components AI to A4) of compounds having isocyanate-reactive hydrogen atoms with an OH number according to DIN 53240 of> 260 to ⁇ 4000 mg KOH / g,
• AI to A4 water and / or physical blowing agents, A4 0.5 to 10 parts by weight (based on the sum of parts by weight of components AI to A4) auxiliaries and additives such
• R 1 , R 2 , R 4 and R 5 are each independently H and R 3 and R 6 to R 12 are each independently H or an O-C 6 alkyl group, Y is a monovalent or divalent cation, and
• n 1 or 2
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 5, 9 or 10 in which
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 to R 12 are each independently H, an optionally substituted G-Cg alkyl group or an optionally substituted aryl group,
• Y is a monovalent or divalent cation
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 5, 9 or 10 in which
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 to R 12 each independently of one another denote H or j in each case independently of one another H or a G-C 6 alkyl group
• Y is a monovalent or divalent cation
• n 1 or 2
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 5, 9 or 10 in which
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 , R 2 , R 4 and R 5 are each independently H and R 3 and R 6 to R 12 are each independently H or an O-C 6 alkyl group, Y is a monovalent or divalent cation, and
• n 1 or 2
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 5, 9 or 10 in which
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 to R 12 each independently of one another denote H or j in each case independently of one another H or a G-C 6 alkyl group
• Y is a monovalent or divalent cation
• n 1 or 2
• Multi-core MDI Polyphenylpolymethylenpolyisocyanat
• 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate and / or pMDI-based carbodiimides, uretdiones or Uretdionimine.
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 5, 9 or 10 in which
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 to R 12 each independently of one another denote H or j independently of one another for H or a C 1 -C 6 -alkyl group
• Y is a monovalent or divalent cation
• multinuclear MDI polyphenylpolymethylene polyisocyanate
• 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate-, and / or pMDI-based carbodiimides from 50 to 64% by weight of polyphenylpolymethylene polyisocyanate ("multinuclear MDI") and / or 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate-, and / or pMDI-based carbodiimides
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 5, 9 or 10 in which
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 , R 2 , R 4 and R 5 are each independently H and R 3 and R 6 to R 12 are each independently H or a CI-C 6 alkyl group, Y is a monovalent or divalent cation, and
• n 1 or 2
• Multi-core MDI Polyphenylpolymethylenpolyisocyanat
• 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate and / or pMDI-based carbodiimides, uretdiones or Uretdionimine.
• the invention relates to a process for the preparation of polyurethanes, preferably polyurethane foams according to embodiment 5, 9 or 10 in which
• A3 0.5 to 25 parts by weight (based on the sum of the parts by weight of components AI to A4) of water and / or physical blowing agents,
• auxiliaries and additives such as
• R 1 , R 2 , R 4 and R 5 are each independently H and R 3 and R 6 to R 12 are each independently H or a CI-C 6 alkyl group, Y is a monovalent or divalent cation, and
• n 1 or 2
• Multi-core MDI Polyphenylpolymethylenpolyisocyanat
• 2,2'-, 2,4'-, 4,4'-diphenylmethane diisocyanate and / or pMDI-based carbodiimides, uretdiones or Uretdionimine.
• the invention relates to polyurethanes or polyurethane foams obtainable by a process according to one of the embodiments 1 to 5 or 7 to 26.
• the invention relates to polyurethanes or polyurethane foams according to embodiment 27 having a density of 4 to 600 kg / m 3 (flexible polyurethane foam), preferably 60 to 120 kg / m 3 (flexible polyurethane foam), or preferably 15 to 55 kg / m 3 (semi-rigid foam)
• the invention relates to polyurethanes or polyurethane foams according to embodiment 27 or 28 for the production of furniture upholstery, textile inserts, mattresses, automobile seats, headrests, armrests, sponges, headliners, door side panels, seat covers or components.
• Test methods The compression hardness, damping and the bulk density of the foams were determined in accordance with DIN EN ISO 3386-1 in the foaming direction. The specimens had a volume of 5 * 5 * 5 cm 3 . A pre-load of 2 kPa was set. The feed rate was 50 mm / min.
• the hydroxyl number was determined according to DIN 53240.
• the open cell density was measured with a AccuPyc 1330 Gas Displacement Pycnometer.
• the glass transition is the maximum of tan ⁇ according to DIN EN ISO 6721-2 B (Torsionspendel method). Determination of aldehyde emissions:
• VDA 275 is a standardized test method of the Verband Academicr Automobil to (VDA). It will be used here in the version valid at the time of registration.
• a foam plate of size 40 * 10 * 2 cm 3 attached freely suspended so that the foam is not in contact with the aqueous solution at the bottom of the bottle.
• the bottle is closed and stored for 3 hours in a convection oven at 60 ° C. Allow the bottle to cool to room temperature, remove the foam.
• a solution of 0.3 mmol / liter dinitrophenylhydrazine (DNPH) in 3 mM phosphoric acid acetonitrile The content of DNPH is 7.5 ⁇ per bottle.
• DNPH dinitrophenylhydrazine
• a foam plate of size 40 * 10 * 4 cm 3 attached freely suspended so that the foam is not in contact with the aqueous solution at the bottom of the bottle.
• the bottle is closed and stored for 3 hours in a convection oven at 65 ° C. Allow the bottle to cool to room temperature, remove the foam and analyze the composition of the aqueous solution by LC-MS / MS on the
• Hydrazones of the aldehydes given below. For each foam quality, three bottles are examined. For each test run, three bottles without foam are examined. The mean blank value is subtracted from the measured values. On this basis, the emission of the respective aldehydes per kilogram of foam is calculated back. The information is given in mg aldehyde per kg foam.
• the polyurethane foams are prepared by mixing a polyol formulation A and an isocyanate component B.
• the specified OH numbers are obtained in accordance with DIN 53240 in the version valid at the time of registration.
• Test series 1 soft foam z. B. for noise absorption
• Al-1 polyether mixture of a glycerine-started polyalkylene oxide having a molecular weight of 4.8 kg / mol, an OH number of 35 mg KOH / g, and an ethylene oxide content of ⁇
• A4-1 black paste Isopur N, commercial product of the company
• A4-2 Tegostab B8734 LF2 foam stabilizer, commercial product of Evonik Nutrition & Care, Essen
• A4-3 Glycerol-started polyalkylene oxide used as cell opener with an OH number of 37 mg KOH / g and an ethylene oxide content of> 50% by weight
• A4-4 catalyst mixture of Jeffcat® DPA (commercial product from Huntsman) and Dabco® NE 300 (commercial product from Air Products) in the ratio 6: 1 (by weight)
• A5-1 cyanoacetic acid 67% in DEG (diethylene glycol)
• Bl Mixture of MDI isomers and homologues with a density of 1.24 kg / l, an isocyanate content of 323 g / kg and a viscosity of 0.05 Pa * s.
• the content of 4,4'- MDI is 55% by weight.
• the sum of 2,2'-MDI, 2,4'-MDI and 4,4'-MDI is 70 wt .-%.
• the isocyanate / isocyanate mixture / prepolymer is weighed into a suitable beaker and emptied again (flow time: 3 s). This, still wetted on the inner walls cup is tared and filled again with the specified amount of isocyanate.
• the isocyanate is added to the polyol formulation (flow time: 3 seconds). The mixture is mixed intensively with an agitator (Pendraulik) for 5 seconds.
• a stopwatch is started, from which the characteristic reaction times are read off. Approximately 93 grams of the reaction mixture are poured into a 23 ° C Teflon-lined aluminum box mold of 1.6 dm 3 volume. The mold is closed and locked. After six minutes, the lock is opened, released, and the mold pressure is qualitatively assessed by the molding height of the mold cover [mm]. The demolded foam pad is assessed qualitatively with regard to reaction as well as skin and pore structure.
• the reaction kinetics are determined on the remainder of the reaction mixture in the beaker.
• the start time is reached when an expansion of the mixture is observed.
• the setting time is reached when you can draw threads with a Holzsiedestestchen by dabbing on the surface of the rising foam. Alternatively, lumps form on the wooden swab.
• the rise time is reached when the foam finally stops to expand. It is important to note that some systems tend to sag and then rise again.
• the compression hardness was measured parallel to the foaming direction at 40% compression. A pre-load of 2 kPa was set. The feed rate was 50 mm / min.
• Measuring method 1 (bottle method according to VDA 275)
• Test series 2 semi-hard block foam z. B. for noise absorption
• (Al / A2) -1 polyether mixture of a glycerol / sorbitol co-initiated polyalkylene oxide having an equivalent weight of 1.8 kg / mol and an OH number of 31 mg KOH / g, a glycerol-started polyalkylene oxide having a Equivalent weight of 0.1 kg / mol and an OH number of 560 mg KOH / g and a propylene glycol-initiated polyalkylene oxide having an equivalent weight of 0.2 kg / mol and an OH number of 280 mg KOH / g in a weight ratio 38 : 50: 12th
• A4-6 Catalyst: Reaction product of oleic acid and dimethylaminopropylamine (1: 1 molar)
• A5-2 Acethydrazide
• A5-4 DHBH: Reaction product of hydrazine hydrate and cyclic propylene carbonate (1: 2 molar)
• CMPA 2-cyano-N-methyl-N-phenylacetamide
• A5-6 KCA: potassium cyanoacetate
• B-2 Mixture of MDI isomers and homologues with a density of 1.22 kg / l, an isocyanate content of 322 g / kg and a viscosity of 0.05 Pa * s.
• the content of 4,4'-MDI is 47 wt .-%.
• the sum of 2,2'-MDI, 2,4'-MDI and 4,4'-MDI is 70%. Weight% in the
• DHBH is the reaction product of hydrazine hydrate and cyclic propylene carbonate (1: 2 molar).
• KCA is potassium cyanoacetate K + [NC-CH2-C02] ⁇ .
• CMPA is 2-cyano-N-methyl-N-phenylacetamide NC-CH 2 -CO-N (CH 3 ) (C 6 H 5 ) 0
• the compression hardness was measured parallel to the foaming direction at 10% compression.
• the examples of the invention show a 20% higher hardness with slightly better elasticity
• the open cell content was measured with a AccuPyc 1330 gas displacement pycnometer
• Acethydrazide is basically suitable to reduce formaldehyde emissions from foams. However, cyanoacetylurea and other derivatives of cyanoacetic acid are significantly more effective. In experiments 90 D and 90 E, the acetaldehyde emissions were reduced from 0.6 mg / kg (90V5 comparison) to 0.5 and 0.3 mg / kg, respectively.
• Test series 3 semi-hard block foam z. B. for headliner
• (Al / A2) -2 Glycerol / sorbitol co-initiated polyalkylene oxide polyether blend having an equivalent weight of 1.8 kg / mol and an OH number of 31 mg KOH / g, a glycerine-initiated polyalkylene oxide having an equivalent weight of 0.1 kg / mol of an OH number of 560 mg KOH / g and a propylene glycol-initiated polyalkylene oxide having an equivalent weight of 0.2 kg / mol and an OH number of 280 mg KOH / g in a weight ratio of 39:49:12 ,
• A4-6 reaction product of oleic acid and dimethylaminopropylamine (1: 1 molar)
• B2-2 Mixture of MDI isomers and homologues with a density of 1.22 kg / liter, an isocyanate content of 322 g / kg and a viscosity of 0.05 Pa * s.
• the content of 4,4'-MDI is 47 wt .-%.
• the sum of 2,2'-MDI, 2,4'-MDI and 4,4'-MDI is 70%.
• Cyanacetamide is known as a cell opener.
• foams containing cyanoacetamide were unstable and in one case collapsed.
• the propellant content was increased by 0.5 part by weight and 1.5 parts by weight Jeffcat DPA was added to give an approximately comparable bulk density.
• Additive cyanacetic hydrazide invention 180 200 210 225
• Additive Cyanacetic hydrazide invention 246 250 255 305 The attempt to use cyanacetic hydrazide as an additive leads to foam collapse at index 100. The experiment with code number 110 was not carried out.
• test method 1 Code 80 90 100 110
• Test method 1 Designation 80 V2 90 V7 100 V2 110 V3
• cyanacetic hydrazide also allows foams to be made over a broader range of performance. This is of great advantage for industrial use because foams can be more easily adapted to customer needs.
• AI-2 glycerol-started polyalkylene oxide with a molecular weight of 6.1 kg / mol, a
• A4-2 Tegostab® B8734 LF2 foam stabilizer, commercial product of Evonik Nutrition & Care, Essen
• A4-3 glycerol-started polyalkylene oxide having an OH number of 37 mg KOH / g and a
• A4-7 catalyst mixture of Jeffcat® ZR50 (commercial product of Huntsman) and
• Dabco® NE 300 commercial product of Air Products
• Bl-3 Mixture of MDI isomers and homologues with a density of 1.24 kg / liter, an isocyanate content of 325 g / kg and a viscosity of 0.03 Pa * s.
• the content of 4,4'-MDI is 60% by weight.
• the sum of 2,2'-MDI, 2,4'-MDI and 4,4'-MDI is 83% by weight.
• the two components A and B were reacted with a ratio of 100.
• the amounts of cyanoacetamide A5-7 and cyanacetic hydrazide A5-3 are 7.1 and 6.0 mmol / kg foam, respectively.
• the 24 ° C warm reaction mixture is introduced into a heated to 60 ° C and previously with a release agent (PURA E1429H NV (Chem-Trend)) coated metal mold (9.7 dm 3 volume) introduced.
• the amount used is used according to the targeted bulk density and mold volume.
• the moldings were removed from the mold after 4 minutes and pressed on. The moldings were sealed after 4 hours in aluminum composite foil.
• the formaldehyde emissions were determined by method 2.
• the acetaldehyde emissions are 0.6 mg / kg without additive. Both additives suppress acetaldehyde emissions below the detection limit of 0.3 mg / kg.
• cyanoacetic acid amide is suitable to reduce emissions of formaldehyde.

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• 2016
  • 2016-12-19 EP EP16204942.3A patent/EP3336115A1/de not_active Ceased
• 2017
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• 2022
  • 2022-03-11 US US17/692,426 patent/US20220195107A1/en not_active Abandoned

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