Alkoxylated modified Mannich condensates and manufacture of rigid polyurethane foams therewith
AssigneeTexaco Inc.
InventorMichael E. Brennan
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Abstract
This invention relates to polyols that can be used to prepare rigid foams, such polyols being prepared by reacting a propoxylation product with melamine and a lower alkylene carbonate. The propoxylation product (which can contain some ethylene oxide) is prepared by propoxylating a Mannich condensate prepared by reacting phenol or a C.sub.1 -C.sub.12 alkylphenol with formaldehyde and diethanolamine in the mole ratios of from 1:1:1 to about 1:3:3.
Claims21
A polyol composition prepared by reacting an alkoxylation product of a Mannich condensate with about 3 to about 10 percent by weight of melamine based on the alkoxylation product and with about 1 to about 6 moles of a lower alkylene carbonate per mole of melamine at about 80.degree. to about 150.degree. C. for about 1 to 5 hours, said alkoxylation product having been prepared by reacting an alkylene oxide component comprising from about 90 to 100 wt.% of propylene oxide and 0 to about 10 wt.% of ethylene oxide with a Mannich condensate, said Mannich condensate having been prepared by reacting a phenolic compound with formaldehyde and diethanolamine in the molar ratios of about 1 to about 3 moles of formaldehyde and about 1 to about 3 moles of diethanolamine per mole of said phenolic compound, said phenolic compound being selected from the group consisting of phenol and phenol substituted with an alkyl group containing 1 to 12 carbon atoms.
A method for preparing a polyol composition which comprises reacting an alkoxylation product with about 3 to about 10 percent by weight of melamine and with about 1 to 6 moles of a lower alkylene carbonate per mole of melamine at about 80.degree. to about 150.degree. C. for about 1 to about 5 hours, said alkoxylation product having been prepared by reacting an alkylene oxide component comprising from about 90 to 100 wt.% of propylene oxide and 0 to about 10 wt.% of ethylene oxide with said Mannich condensate, said condensate having been prepared by reacting a phenolic component with about 1 to about 3 moles of formaldehyde and about 1 to about 3 moles of diethanolamine per mole of a phenolic component, said phenolic component being selected from the group consisting of phenol and phenol substituted with an alkyl group containing 1 to 12 carbon atoms.
A method of preparing a rigid polyurethane foam composition which comprises reacting an excess of an aromatic polyisocyanate with a polyol component in the presence of a catalyst, a blowing agent, a surfactant and a fire retardant, said polyol component comprising about 40 to 100 wt.% of a modified alkoxylated Mannich condensate and, correspondingly, from about 60 to 0 wt.% of a polyoxypropylene polyol having a hydroxyl number between 200 and 800, said modified alkoxylated Mannich condensate comprising the reaction product of an alkoxylated Mannich condensate with about 3 to about 10 wt.% of melamine, based on said alkoxylation product and about 1 to 6 moles of a lower alkylene carbonate per mole of melamine, said alkoxylation product comprising a product prepared by reacting an alkylene oxide component comprising from about 90 to 100 wt.% of propylene oxide and, correspondingly, 0 to about 10 wt.% of ethylene oxide with a Mannich condensate prepared by reacting a phenolic compound with about 1 to about 3 moles of formaldehyde and about 1 to about 3 moles of diethanolamine per mole of a phenolic compound, said phenolic compound being selected from the group consisting of phenol and phenol substituted with an alkyl group containing 1 to 12 carbon atoms.
Dependencies are inferred from the claim text.