Modified terephthalic ester polyols and rigid foams therefrom

Claim 2

A terephthalic ester polyol produced by reacting recycled polyethylene terephthalate with about 5 wt % to 95 wt % of a functionality enhancing agent selected from the group consisting of aromatic amino polyols, sucrose polyols, alkoxylated alphamethyl glucosides, alkoxylated glycerine and alkoxylated sorbitol.

Claim 3

The terephthalic ester polyol of claim 1 wherein the polyethylene terephthalate is reacted with about 20 wt % to 50 wt % of the functionality enhancing agent.

Claim 4

The terephthalic ester polyol of claim 1 wherein the functionality enhancing agent is an aromatic amino polyol which is an alkoxylated phenolic Mannich condensate.

Claim 5

The terephthalic ester polyol of claim 1 wherein the functionality enhancing agent is an aromatic amino polyol produced by the Mannich condensation of nonylphenol, formaldehyde and diethanolamine in a molar ratio of about 1:1-3:1-3 alkoxylated with an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof in a nonylphenol to alkylene oxide molar ratio of about 1:3 to 1:9.

Claim 6

The terephthalic ester polyol of claim 1 wherein the functionality enhancing agent is the aromatic amino polyol produced by the Mannich condensation of nonylphenol, formaldehyde and diethanolamine in a molar ratio of about 1:1-2:1-3 alkoxylated with propylene oxide in a nonylphenol to propylene molar ratio of about 1:3 to 1:5.

Claim 7

The terephthalic ester polyol of claim 1 wherein the functionality enhancing agent is selected from the group consisting of sucrose alkoxylated with 4 to 25 moles of alkylene oxide and a mixture of sucrose, glycerine and/or an alkanolamine, alkoxylated with 2 to 25 moles of alkylene oxide, the alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof.

Claim 8

A terephthalic ester polyol of claim 1 wherein the functionality enhancing agent is the sucrose polyol produced by the reaction of sucrose, diethanolamine and ethylene oxide in a mole ratio of about 1:1-2:2-3, alkoxylated with about 10 to 20 moles of propylene oxide.

Claim 9

A terephthalic ester polyol of claim 1 wherein the functionality enhancing agent is an alkoxylated alphamethyl glucoside produced by alkoxylating alphamethyl glucoside with 2 to 20 moles of an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof.

Claim 10

A rigid foam obtained by reacting in the presence of a blowing agent and a catalyst for polyisocyanurate or polyurethane formation, an organic polyisocyanate and polyol component comprising the terephthalic ester polyol of claim 1.

Claim 11

A mixture of modified terephthalic ester polyols produced by: a. reacting recycled polyethylene terephthalate with an oxyalkylene glycol of the formula: ##STR3## wherein R is hydrogen or alkyl of 1 to 4 carbon atoms and n ranges from 2 to 10 to form a mixture of terephthalic ester polyols; b. reacting the mixture of terephthalic ester polyols with about 5 wt % to 95 wt % of a functionality enhancing agent selected from the group consisting of aromatic amino polyols, sucrose polyols, alkoxylated alphamethyl glucosides, alkoxylated glycerine and alkoxylated sorbitol.

Claim 12

A mixture of modified terephthalic ester polyols produced by: a. reacting recycled polyethylene terephthalate with an oxyalkylene glycol of the formula: ##STR3## wherein R is hydrogen or alkyl of 1 to 4 carbon atoms and n ranges from 2 to 10 to form a mixture of terephthalic ester polyols; b. reacting the mixture of terephthalic ester polyols with about 5 wt % to 95 wt % of a functionality enhancing agent selected from the group consisting of aromatic amino polyols, sucrose polyols, alkoxylated alphamethyl glucosides, alkoxylated glycerine and alkoxylated sorbitol.

Claim 13

The mixture of modified terephthalic ester polyols of claim 10 the polyethylene terephthalate is reacted with about 20 wt % to 50 wt % of the functionality enhancing agent.

Claim 14

The mixture of modified terephthalic ester polyols of claim 10 wherein the functionality enhancing agent is an aromatic amino polyol which is an alkoxylated phenolic Mannich condensate.

Claim 15

The mixture of modified terephthalic ester polyols of claim 10 wherein the functionality enhancing agent is an aromatic amino polyol produced by the Mannich condensation of nonylphenol, formaldehyde and diethanolamine in a molar ratio of about 1:1-3:1-3 alkoxylated with an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof in a nonylphenol to alkylene oxide molar ratio of about 1:3 to 1:9.

Claim 16

The mixture of modified terephthalic ester polyols of claim 10 wherein the functionality enhancing agent is the aromatic amino polyol produced by the Mannich condensation of nonylphenol, formaldehyde and diethanolamine in a molar ratio of about 1:1-2:1-3 which is alkoxylated with propylene oxide in a nonylphenol to propylene oxide molar ratio of about 1:3 to 1:5.

Claim 17

The mixture of modified terephthalic ester polyols of claim 10 wherein the functionality enhancing agent is selected from the group consisting of sucrose alkoxylated with 4 to 25 moles of alkylene oxide and a mixture of sucrose glycerine and/or an alkanolamine, alkoxylated with 2 to 25 moles of alkylene oxide, the alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof.

Claim 18

The mixture of terephthalic ester polyols of claim 10 wherein the functionality enhancing agent is the sucrose polyol produced by the Mannich condensation of sucrose, diethanolamine and ethylene oxide in a mole ratio of about 1:1-2:2-3 alkoxylated with about 10 to 20 moles of propylene oxide.

Claim 19

The mixture of modified terephthalic ester polyols of claim 10 wherein the functionality enhancing agent is an alkoxylated alphamethyl glucoside produced by alkoxylating alphamethyl glucoside with 2 to 20 moles of alkylene oxide.

Claim 20

The mixture of modified terephthalic ester polyols of claim 10 wherein in step a. a functionality enhancing additive selected from the group consisting of alphamethyl glucoside, triethanolamine, diethanolamine and glycerine is present during the reaction.

Claim 21

The mixture of modified terephthalic ester polyols of claim 10 wherein in step a. alphamethyl glucoside is present in an amount up to about 10 wt % based on the total weight of reactants charged.

Claim 22

A rigid polyisocyanate foam obtained by reacting in the presence of a blowing agent and a catalyst for polyisocyanurate formation, an organic polyisocyanate and polyol components comprising the mixture of modified terephthalic ester polyols of claim 10.

Claim 23

A mixture of modified terephthalic ester polyols produced by: a. reacting recycled polyethylene terephthalate with diethylene glycol and at least one or more oxyalkylene glycol of the formula: ##STR4## wherein R is hydrogen or alkyl of 1 to 4 carbon atoms and n ranges from 2 to 10. wherein the mole ratio of glycols to recycled polyethylene terephthalate is greater than 1.2:1; b. stripping off as overhead at least 5 wt % of the reaction product from step a. based on the reactants charged, where at least 25% of the overhead is ethylene glycol; to form a mixture of terephthalic ester polyols of average hydroxyl number between 100 and 500; c. reacting the mixture of terephthalic ester polyols with about 5 wt % to 95 wt % of a functionality enhancing agent selected from the group consisting of aromatic amino polyols, sucrose polyols, alkoxylated alphamethyl glucosides, alkoxylated glycerine and alkoxylated sorbitol.

Claim 24

A mixture of modified terephthalic ester polyols produced by: a. reacting recycled polyethylene terephthalate with diethylene glycol and at least one or more oxyalkylene glycol of the formula: ##STR4## wherein R is hydrogen or alkyl of 1 to 4 carbon atoms and n ranges from 2 to 10. wherein the mole ratio of glycols to recycled polyethylene terephthalate is greater than 1.2:1; b. stripping off as overhead at least 5 wt % of the reaction product from step a. based on the reactants charged, where at least 25% of the overhead is ethylene glycol; to form a mixture of terephthalic ester polyols of average hydroxyl number between 100 and 500; c. reacting the mixture of terephthalic ester polyols with about 5 wt % to 95 wt % of a functionality enhancing agent selected from the group consisting of aromatic amino polyols, sucrose polyols, alkoxylated alphamethyl glucosides, alkoxylated glycerine and alkoxylated sorbitol.

Claim 25

The mixture of polyols of claim 21 wherein the functionality enhancing agent is in an amount of 20 wt % to 50 wt %.

Claim 26

The mixture of polyols of claim 21 wherein the functionality enhancing agent is an aromatic amino polyol which is an alkoxylated phenolic Mannich condensate.

Claim 27

The mixture of polyols of claim 21 wherein the functionality enhancing agent is an aromatic amino polyol produced by the Mannich condensation of nonylphenol, formaldehyde and diethanolamine in a molar ratio of about 1:1-3:1-3 alkoxylated with an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof in a nonylphenol to alkylene oxide molar ratio of about 1:3 to 1:9.

Claim 28

A mixture of polyols of claim 21 wherein the functionality enhancing agent is the aromatic amino polyol produced by the Mannich condensation of nonylphenol, formaldehyde and diethanolamine in a molar ratio of about 1:1-2:1-3 alkoxylated with propylene oxide in a nonylphenol to propylene oxide molar ratio of about 1:3 to 1:5.

Claim 29

The mixture of polyols of claim 21 wherein the functionality enhancing agent is selected from the group consisting of sucrose alkoxylated with 4 to 25 moles of alkylene oxide and a mixture of sucrose, glycerine and/or an alkanolamine, alkoxylated with 2 to 25 moles of alkylene oxide, the alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof.

Claim 30

A terephthalic ester polyols of claim 21 wherein the functionality enhancing agent is the sucrose polyol produced by the reaction of sucrose, diethanolamine and ethylene oxide in a mole ratio of about 1:1-2:2-3, alkoxylated with about 10 to 20 moles of propylene oxide.

Claim 31

The mixture of polyols of claim 21 wherein the functionality enhancing agent is an alkoxylated alphamethyl glucoside produced by alkoxylating alphamethyl glucoside with 2 to 20 moles of alkylene oxides.

Claim 32

A rigid foam obtained by reacting in the presence of a blowing agent and a catalyst for polyisocyanurate or polyurethane formation, an organic polyisocyanate and polyol component comprising the mixture of modified terephthalic ester polyols of claim 21.