Polyols, use and method of preparation
AssigneePolylactane, Inc.
InventorsGeorge Magnus, Brian Kelley
Life of this patent
Estimating the term…
Abstract
Alkoxylated polyols are prepared by dispersing a nitrogen-containing material, such as urea, into a dispersing media comprised of a polyether or polyester polyol and a chemical moiety capable of being alkoxylated, such as a carbohydrate, i.e. whey permeate or sucrose, lactose, etc., and reacting the resultant dispersion with a C.sub.2 -C.sub.6 epoxide to form an alkoxylated polyol having a hydroxyl number below about 600. In certain embodiments, up to about 25% by weight of a urea material can be incorporated within the alkoxylated polyol for improved flame retardancy in the polyurethane/polyisocyanate/polyisocyanurate foams produced therefrom.
Claims30
A method of producing an alkoxylated polyol comprising:
- (a) dispersing a urea reactant in a liquid dispersing media comprised of a polyether polyol, a polyester polyol and mixtures thereof and a chemical moiety capable of being alkoxylated and being characterized by at least the following characteristics:
- (1) being selected from the group consisting essentially of carbohydrates, triazines, derivatives and sources thereof and mixtures thereof;
- (2) being dispersible in said dispersing media at a temperature below about 130.degree. C.;
- and
- (3) having at least two reactive hydrogen atoms therein;
- and
- (b) reacting the resultant dispersion with a C.sub.2 -C.sub.6 epoxide under alkoxylation conditions for a period of time sufficient to obtain an alkoxylated polyol having a hydroxyl number below about 600.
A method of producing an alkoxylated polyol containing a urea reactant comprising:
- (a) dispersing a urea reactant in a liquid dispersing media comprised of a polyether polyol, a polyester polyol and mixtures thereof and a chemical moiety capable of being alkoxylated and being characterized by at least the following characteristics:
- (1) being selected from the groups consisting essentially of carbohydrates, triazines, derivatives thereof and mixtures thereof;
- (2) being dispersible in said dispersing media at a temperature below about 130.degree. C.;
- and
- (3) having at least two reactive hydrogen atoms therein;
- (b) reacting the resultant dispersion within C.sub.2 -C.sub.6 epoxide under alkoxylation conditions for a period of time sufficient to obtain an alkoxylated polyol having a hydroxyl number below about 600;
- and
- (c) adding up to about 25% by weight, based on a 100% total weight basis of said alkoxylated polyol, of a urea reactant selected from the groups consisting essentially of urea, thiourea, substituted ureas, cyclic ureas and mixtures thereof, and maintaining said reaction conditions for a period of time sufficient to incorporate at least some of said urea reactant within said alkoxylated polyol.
An alkoxylated polyol containing at least about 30% tertiary nitrogen, based on a 100% total basis of primary secondary and tertiary nitrogen present in said polyol.
A method of producing an alkoxylated polyol containing a urea reactant comprising:
- (a) dispersing a urea reactant in a liquid dispersing media comprises of a polyether polyol, a polyester polyol and mixtures thereof and a chemical moiety capable of being alkoxylated and being characterized by at least the following characteristics:
- (1) being selected from the groups consisting essentially of carbohydrates, triazines, derivatives thereof and mixtures thereof;
- (2) being dispersible in said dispersing media at a temperature below about 130.degree. C.;
- and
- (3) having at least two active hydrogen atoms therein;
- (b) reacting the resultant dispersion with a C.sub.2 -C.sub.6 epoxide under alkoxylation conditions at a temperature in the range of about 80.degree. to 130.degree. C. for a period of time sufficient to obtain an alkoxylated polyol having a hydroxyl number below about 600;
- (c) cooling said alkoxylated polyol to a temperature in the range of about 10.degree. 110.degree. C. and adding up to about 25% by weight based on a 100% total weight basis of said alkoxylated polyol, of a urea reactant selected from the groups consisting essentially of urea, thiourea, substituted ureas, cyclic ureas and mixtures thereof;
- and
- (d) heating the resultant admixture at a temperature in the range of about 110.degree. to 120.degree. C. with venting of ammonia for a period of time sufficient to incorporate at least some of said urea material within said alkoxylated polyol.
Dependencies are inferred from the claim text.