Tertiary amine-containing polyols prepared in a mannich condensation reaction using a mixture of alkanolamines

Mannich polyols of low viscosity and reduced reactivity are prepared by condensing a phenolic compound with formaldehyde and a mixture of diethanolamine and at least one other alkanol amine. The condensation product is the alkoxylated to form a polyol which is particularly useful in preparing rigid polyurethane foam.

Tertiary amine-containing polyols prepared in a Mannich condensation reaction using a mixture of alkanolamines

An improved process for preparing Mannich polyols is disclosed. The process involves capping a Mannich condensate of a phenolic compound or an amino-substituted s-triazine with a small quantity of an alkylene oxide in the absence of an alkylene oxide polymerization catalyst, prior to heating the condensate to elevated temperatures at which polycondensates are formed. The capped Mannich condensate is then alkoxylated to form the desired polyol.

Preparation of polyether compositions

In an improved process for the preparation of polyether compositions, amine-initiated, alkaline catalyzed polyethers are neutralized with a substantial excess of formic acid that neutralizes the catalyst and stabilizes the resultant composition. This is particularly advantageous where tertiary nitrogen is found in the amine initiator or in the polyether that results.

Melamine-alkanolamine condensates and polyurethanes prepared therefrom

Condensates of certain amino-substituted s-triazines, formaldehyde and alkanolamines are disclosed. These condensates can be used, with or without alkoxylation, in forming polyurethanes having desirable burn properties.

Process for preparing rigid polyurethane foams

This invention is directed to a process by preparing a rigid polyurethane foam which comprise reacting a polyisocyanate with a polyol in the presence of a blowing agent, a polymerization catalyst and a surfactant. The polyol has the formula см. иллюстрацию в PDF-документе ...

Process for making low density flexible polyisocyanurate-polyurethane foams

Low density flexible molded and slabstock foams are prepared by reacting a polyisocyanate with a polyol composition containing a mono-alcohol. The blowing of the foam is essentially with carbon dioxide generated from the reaction of water with isocyanate, and the reaction catalysts used in the preparation of the foam include a polyisocyanate trimerization catalyst.

Tertiary amine-containing polyols prepared in a mannich condensation reaction using a mixture of alkanolamines

Mannich polyols of low viscosity and reduced reactivity are prepared by condensing a phenolic compound with formaldehyde and a mixture of diethanolamine and at least one other alkanol amine. The condensation product is the alkoxylated to form a polyol which is particularly useful in preparing rigid polyurethane foam. The Mannich polyols of this invention are characterized by having surprisingly lower viscosities and reactivities as compared to Mannich polyols which are prepared using either diethanolamine or the other alkanolamine alone in the condensation reaction.

Tertiary amine-containing polyols prepared in a mannich condensation reaction using a mixture of alkanolamines

Mannich polyols of low viscosity and reduced reactivity are prepared by condensing a phenolic compound with formaldehyde and a mixture of diethanolamine and at least one other alkanol amine. The condensation product is the alkoxylated to form a polyol which is particularly useful in preparing rigid polyurethane foam. The Mannich polyols of this invention are characterized by having surprisingly lower viscosities and reactivities as compared to Mannich polyols which are prepared using either diethanolamine or the other alkanolamine alone in the condensation reaction.

Preparation of polyether compositions

In an improved process for the preparation of polyether compositions, amine-initiated, alkaline catalyzed polyethers are neutralized with a substantial excess of formic acid that neutralizes the catalyst and stabilizes the resultant composition. This is particularly advantageous where tertiary nitrogen is found in the amine initiator or in the polyether that results.

Melamine-alkanolamine condensates and polyurethanes prepared therefrom

Condensates of certain amino-substituted s-triazines, formaldehyde and alkanolamines are disclosed. These condensates can be used, with or without alkoxylation, in forming polyurethanes having desirable burn properties. Unlike melamine and certain melamine derivatives, only small amounts of the present condensates are required to provide effective flame retardancy.

Process for making low density flexible polyurethane foams

Low density flexible molded and slabstock foams are prepared by reacting a polyisocyanate with a polyol composition containing a polyether mono-alcohol. The blowing of the foam is essentially with carbon dioxide generated from the reaction of water with isocyanate, and the reaction catalysts used in the preparation of the foam include a polyisocyanate trimerization catalyst used in admixture with a urethane catalyst.

Tertiary amine-containing polyols prepared in a mannich condensation reaction using a mixture of alkanolamines

ABSTRACT A process for preparing Mannich polyols is disclosed. The process involves capping a Mannich condensate of a phenolic compound or an amino-substituted s-triazine with a small quantity of ah alkylene oxide in the absence of an alkylene oxide polymerization catalyst, prior to heating the condensate to elevated temperatures at which polycondensates are formed. The capped Mannich condensate is then alkoxylated to form the desired polyol.

Alkoxylierte mannichkondensate enthaltende polyole und verfahren zu ihrer herstellung.