Abstract:
POLYISOCYANATES WHICH CONTAIN BIURET GROUPS ARE PREPARED BY A PROCESS WHICH COMPRISES REACTING A POLYISOCYANATE WITH A DIPRIMARY AROMATIC DIAMINE THE REACTIVITY OF WHICH AMINES WITH ISOCYANATES ARE ATTENUATED BY ELECTROPHLILIC SUBSTITUENTS OR SUBSTITUENTS WHICH STERICALLY HINDER THE AMINO GROUPS SUCH THAT INTIMATE MIXING OF THE REACTANTS IS POSSIBLE WITH NO IMMEDIATE REACTION SUCH AS, FOR EXAMPLE, THE FORMATION OF POLYUREAS TAKING PLACE.
Abstract:
A process is disclosed which eliminates the necessity of applying a mold release agent to the mold when producing integral skinned polyurethane foam moldings in closed molds. This is accomplished by incorporating in the foamable reaction mixture an additive, which imparts mold release properties, said additive containing at least 25 aliphatic carbon atoms and being the salt of an aliphatic carboxylic acid and either a primary amine or an amine which contains either amide or ester groups.
Abstract:
COMPOUNDS HAVING TERMINAL AMINO GROUPS AND THE GENERAL FORMULA
((2-NH2-PHENYL)-CO-X-)N-R
WHEREIN N IS AN INTEGER OF FROM 2 TO 8, X IS OXYGEN OR SULPHUR, AND R IS AN N-VALENT RADICAL OBTAINED BY THE REMOVAL OF HYDROXYL GROUPS OR MERCAPTO GROUPS FROM AN N-VALENT POLYALKYLENE ETHER POLYOL OF MOLECULAR WEIGHT 600 TO 10,000 OR FROM AN N-VALENT ALKYLENE THIOETHER POLYTHIOL OF MOLECULAR WEIGHT 600 TO 10,000. THESE COMPOUNDS ARE PREPARED BY REACTION POLYOLS WITH ISATOIC ACID, ANHYDRIDE AND ARE USEFUL IN REACTION WITH ORGANIC POLYISOCYANATES TO PREPARE ALL TYPE OF POLYURETHANE POLYMERS.
Abstract:
NOVEL AROMATIC DIAMINES HAVING THE GENERAL FORMULA
((2-NH2-PHENYL)-CO-X-)N-R
WHEREIN N IS AN INTEGER OF FROM 2 TO 8, X IS SULFOR OR OXYGEN, AND R IS AN N-VALENT HYDROCARBON RADICAL WHICH MAY BE INTERRUPTED BY O OR S ATOMS AND WHICH IS OBTAINED BY REMOVING OH OR SH GROUPS FROM A POLYOL OR POLYTHIOL HAVING A MOLECULAR WEIGHT OF LESS THAN 600, P ARE PREPARED BY REACTING A COMPOUND HAVING THE FORMULA (HX)NR WHERE X, N AND R ARE AS DEFINED ABOVE WITH ABOUT N-EQUIVALENTS OF AN ISATOIC ACID ANHYDRIDE IN THE PRESENCE OF A STRONG BASE. THE AROMATIC DIAMINES OF THE INVENTION ARE PARTICULARLY USEFUL AS THE ACTIVE HYDROGEN CONTAINING COMPONENT FOR REACTION WITH POLYISOCYANATES IN THE PREPARATION OF SYNTHETIC RESINS BY THE ISOCYANATE-POLYADDITION PROCESS.
Abstract:
ISOCYANO-DIPHENYL ETHERS AND THIOETHERS, I.E. ISOCYANO(OPTIONALLY MONO-AND DICHLORO, ALKYL AND ALKOXY)-4''ALKYL-DIPHENYL ETHERS AND THIOETHERS, OR 1-(4''-ALKYL- PHENOXY AND -PHENYLMERCAPTO)-(OPTIONALLY 2,3,4,5 AND/OR 6MONO- AND DI-CHLORO, ALKYL AND ALKOXY)-PHENYL-ISOCYANIDES, WHICH POSSESS PESTICIDAL, ESPECIALLY ACARICIDAL, PROPERTIES.
Abstract:
1365215 Polyurethane foams BAYER AG 3 May 1972 [3 May 1971] 20558/72 Heading C3R [Also in Division B5] Polyurethane foams are prepared by reacting, in a closed mould, a reaction mixture comprising a polyisocyanate, a compound containing at least two active hydrogen atoms, a blowing agent and a mould-parting agent, which mouldparting agent is a mixture of at least two of the following components A, B and C: (A) a salt of an aliphatic carboxylic acid and an amine which salt contains at least 20 aliphatic carbon atoms, (B) an ester of a monofunctional and/or polyfunctional carboxylic acid, which contains -COOH and/or -OH groups, and has an -OH or acid number of at least 5, and (C) a natural or synthetic oil, fat or wax. The mould-parting agent is used preferably in amount of 0À1 to 25% by weight of the weight of the foamable mixture and each component thereof is present in an amount of at least 5% by weight, based on the weight of the mould parting agent. The salt (A) may contain amide and/or ester groups and may be an oleic acid salt or tall oil fatty acid salt of an amidoamine which is obtained by reacting N,N-dimethylamino-propylamine with oleic acid or tall oil fatty acid. Examples of ester (B) are oleic acid esters, tall oil fatty acid esters and/or train oil fatty acid esters of a polyhydric aliphatic alcohol in which on average at least one OH group is not esterified. The component (C) may be white oil, lanolin and/or paraffin oil. Conventional polyisocyanates, active hydrogen-containing compounds, e.g. polyethers and polyesters, blowing agents, catalysts and surfactants may be used in the preparation of the foams.
Abstract:
1420293 Foam resins BAYER AG 15 Feb 1974 [16 Feb 1973 18 April 1973] 6973/74 Heading C3R Foam resins based on polyisocyanates are prepared in a closed mould in the presence of a mould release agent which is the reaction product of a mono- and/or polyisocyanate and a fatty acid ester in which at least one aliphatic carboxylic acid which contains more than eight carbon atoms is built into the molecule, which fatty acid ester has an acid number of from 0 to 100 and a hydroxyl number of from 0 to 150, at least one of the two values being greater than 0. The foam resin is preferably one which contains urethane groups and as well as being derived from a polyisocyanate is derived from a polyether which contains predominantly primary hydroxyl groups. The reaction product of the fatty acid ester and a polyisocyanate may be prepared in situ in the polyisocyanate subsequently used in the foam-forming reaction. Suitable monoisocyanates are equimolar addition products of diisocyanates and monohydroxyl compounds, benzyl isocyanate, phenyl isocyanate, tolyl isocyanate, cyclohexyl isocyanate or stearyl isocyanate. Exemplified fatty acid esters are addition products of pentaerythritol, oleic acid and adipic acid, self-addition products of ricinoleic acid, an addition product of train oil fatty acid and sorbitol, and natural wool fat. The process may be used for the production of rigid, semirigid or flexible polyurethane foams.
Abstract:
Novel aromatic diamines having the general formula WHEREIN N IS AN INTEGER OF FROM 2 TO 8, X is sulfur or oxygen, and R is an n-valent hydrocarbon radical which may be interrupted by O or S atoms and which is obtained by removing OH or SH groups from a polyol or polythiol having a molecular weight of less than 600, are prepared by reacting a compound having the formula (HX)nR where X, n and R are as defined above with about n-equivalents of an isatoic acid anhydride in the presence of a strong base. The aromatic diamines of the invention are particularly useful as the active hydrogen containing component for reaction with polyisocyanates in the preparation of synthetic resins by the isocyanate-polyaddition process.
Abstract:
A process is described for the successive production of at least two non-cellular molded articles differing in their mechanical properties. Both articles are based on organic polyisocyanates which are trimerized in the presence of compounds which are reactive with isocyanate groups where the equivalent ratio of NCO groups to groups reactive with NCO groups is varied within the range of 1:0.8 to 1:0. In a second embodiment, a uniform article is produced having anisotropic mechanical characteristics varying continuously and/or stepwise.