Basf Aktiengesellschaft

Basf Corporation

Manfred Genz

Bernd Bruchmann

Roland Minges

Helmut Tesch

Joachim Streu

Friedhelm Lehrich

Siegmund Pohl

Heinz Bollmann

Wolfgang Scholz

Johann Swoboda

Ruediger Krech

Guenter Scholz

Hartmut Peuker

Torsten Jeschke

R&uuml;diger Voelkel

Michael Strauss

Walter Haselhorst

Gerhard Hellmann

Udo Rotermund

Renate Hempel

Andreas H Rothacker

Ute Nichau

Frank Prissok

Peter Horn

Gerhard Lehr

Ute Bruns

Horst King

Johann Nikolitsch

Karl-Heinz Baumann, Deceased

PROCESS FOR PRODUCING COMPACT OR CELLULAR POLYURETHANE ELASTOMERS BASED ON 3,3&prime; DIMETHYL DIPHENYL 4,4&prime; DIISOCYANATE-CONTAINING POLYISOCYANATE MIXTURES AND ISOCYANATE PREPOLYMERS SUITABLE THEREFOR

Method of preparing compact or cellular polyurethane elastomers and isocyanate prepolymers suitable therefor

Process for preparing compact or cellular polyurethane elastomers and isocyanate prepolymers suitable for this purpose

Microcellular urea-containing polyurethane elastomer

Microcellular polyurethane elastomer containing urea groups

Thermoplastic polyurethanes are prepared by reacting (a) isocyanates with (b) compounds reactive toward isocyanates, in the presence or absence of (c) chain extenders, (d) catalysts and (e) customary auxiliaries and additives and adding crosslinked polyurethanes in comminuted form before, during and/or after the reaction.

Thermoplastic polyurethanes and their preparation

In an apparatus for producing foamed plastics parts, a closed mold (1) is filled with polymer molding compound and, after the elapse of a reaction time, the finished part is removed. A plurality of identical molds (1) run on mold carriers (5) through a production installation. For the purpose of reducing the production outlay, a demolding device (11) shared by all the molds (1) is brought into operative connection successively with the molds (1) and in each case one mold (1) is opened. The movements required in this operation are executed by the demolding device (11). An unlocking unit (19) and a swiveling unit (20) of the demolding device (11) are brought into engagement with the mold (1) by a positioning unit (21), after which the mold (1) is unlocked and one mold half (1a) of the mold (1) is swung open. For unlocking the mold (1), the latter is raised against spring force and a positive locking is brought out of engagement.

Apparatus for producing foamed plastics parts

4,4'-disubstituted bis(2,6-diisopropylphenyl)carbodiimides of the formula (I) ##STR1## where R is 1-methyl-1-phenylethyl, phenoxy or tert-butyl, a process for their preparation, their use as stabilizers against hydrolytic degradation of polyaddition and polycondensation products containing ester groups, and the novel 4-(1-methyl-1-phenylethyl)-2,6-diisopropyl-, 4-phenoxy-2,6-diisopropyl- and 4-tert-butyl-2,6-diisopropylphenyl isocyanates which can be used for their preparation.

4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their

4,4'-disubstituted bis-(2,6-diisopropylphenyl)carbodiimides of the formula (I) ##STR1## where R is 1-methyl-1-phenylethyl, phenoxy or tert-butyl, a process for their preparation, their use as stabilizers against hydrolytic degradation of polyaddition and polycondensation products containing ester groups, and the novel 4-(1-methyl-1-phenylethyl)-2,6-diisopropyl-, 4-phenoxy-2,6-diisopropyl- and 4-tert-butyl-2,6-diisopropylphenyl isocyanates which can be used for their preparation.

4-substituted bis (2,6-diisopropylphenyl)- carbodiimides, their

Novel carbodiimides and/or oligomeric polycarbodiimides containing terminal isocyanate, urethane and/or urea groups are obtainable, for example, by condensation of 1,3-bis(1-methyl-1-isocyanatoethyl)benzene with elimination of carbon dioxide followed, if desired, by reaction of all or some of the free isocyanate groups of the resultant (poly)carbodiimides with aliphatic, cycloaliphatic or araliphatic amines, alcohols and/or alkoxypolyoxyalkylene alcohols, and are used as stabilizers against hydrolytic degradation of polyaddition and polycondensation products containing ester groups.

Carbodiimides and/or oligomeric polycarbodiimides based on 1 3-bis

4,4'-disubstituted bis-2,6-diisopropylphenyl)carbodiimides of the formula (I) ##STR1## where R is 1-methyl-1-phenylethyl, phenoxy or tert-butyl, a process for their preparation, their use as stabilizers against hydrolytic degradation of polyaddition and polycondensation products containing ester groups, and the novel 4-(1-methyl-1-phenylethyl)-2,6-diisopropyl-, 4-phenoxy-2,6-diisopropyl- and 4-tert-butyl-2,6-diisopropylphenyl isocyanates which can be used for their preparation.

There is now provided a carbodiimide or polycarbodiimide of the formula: ##STR1## where the R radicals are identical or different and are selected from the group consisting of --NHCONHR.sup.1 --, --NHCONR.sup.1 R.sup.2 --, and --NHCOOR.sup.3 --, where R.sup.1 and R.sup.2 may be identical or different and are alkyl, cycloalkyl, or aralkyl, and R.sup.3 is identical to R.sup.1 or is alkoxypolyoxyalkylene, and n is an integer from 0 to 10. There is also provided an ester containing plastic which contains this carbodiimide as an anti-hydrolysis agent. The plastics may be a polyurethane cellular or non-cellular elastomer or thermoplastic.

Carbodiimides and/or oligomeric polycarbodiimides based on

The present invention relates to novel carbodiimides or oligomeric polycarbodiimides containing terminal isocyanate, urea and/or urethane groups, methods for their preparation, and their use as hydrolysis stabilizers.

Carbodiimides and/or oligomeric polycarbodiimides based on 1,3-bis

The invention pertains to drip retardant flexible polyurethane foams prepared by the reaction of an isocyanate with a polyol resin containing a drip retardant made of either a trialkyl end-capped amine functional silicone polymer or a trialkly end-capped carbinol functional silicone polymer to effectively prevent the foam from dripping while burning and encourage char formation.

Flexible polyurethane foams with reduced dripping during burning

The invention pertains to drip retardant flexible polyurethane foams prepared by the reaction of an isocyanate with a polyol resin containing a drip retardant made of either a trialkyl end-capped amine functional silicone polymer or a trialkyl end-capped carbinol functional silicone polymer to effectively prevent the foam from dripping while burning and encourage char formation.

Growing community of inventors

Damme, Germany

Manfred Genz