# US 5,705,709 A · Preparation of bromine-containing polyols > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,705,709 A - Document ID: US5705709A - Status: Granted - Kind: A - Application number: 08/548,989 - Filed: 1995-10-27 - Granted: 1998-01-06 - Earliest claimed: 1994-11-10 - Assignees: BASF Schwarzheide GmbH - Inventors: Bernd Guettes; Regina Pretzsch; Ralf Fritz - Web page: https://patentgrep.com/patent/US5705709A ## CPC - C07C 43/11: Polyethers containing —O—(C—C—O—)n units with ≤ 2 n≤ 10 - C08G 18/5012: {having bromine atoms} - C08G 65/2609: {containing aliphatic hydroxyl groups} - C08G 65/2639: {the other compounds containing elements other than oxygen, nitrogen or sulfur} - C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ## Abstract The invention relates to a process for the preparation of bromine-containing polyols in which a bromine-containing alcohol is caused to react with an alkylene oxide in admixture with other H-functional compounds and the catalyst used is a system comprising alkaline and Lewis-acid catalysts. ## Claims ### Claim 1 A process for the preparation of bromine-containing polyols, comprising the steps of reacting a bromine-containing alcohol with an alkylene oxide in admixture with H-functional compounds, introducing a catalyst comprising alkaline and Lewis-acid catalysts into said admixture, and thereafter separating the bromine-containing polyols from the resulting by-products, if any. ### Claim 2 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the bromine-containing alcohol is an aliphatic compound having a branched carbon chain. ### Claim 3 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the bromine-containing alcohol is an aliphatic compound having an unbranched carbon chain. ### Claim 4 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the bromine-containing alcohol is a brominated phenol. ### Claim 5 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the H-functional compound is a low molecular weight polyfunctional alcohol. ### Claim 6 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the H-functional compound is a sugar alcohol. ### Claim 7 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the H-functional compound is a reaction product of a polyfunctional alcohol and/or sugar alcohol with alkylene oxide. ### Claim 8 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the alkaline catalyst used is an alkali metal hydroxide and/or alkali metal salt. ### Claim 9 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the Lewis-acid catalyst used is boron trifluoride. ### Claim 10 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the step of reacting a bromine containing alcohol with an alkylene oxide is carried out at a temperature of between about 50.degree. to about 140.degree. C. ### Claim 11 (depends on 1) A process for the preparation of bromine-containing polyols as defined in claim 1, wherein the step of reacting a bromine containing alcohol with an alkylene oxide is carried out at a pressure of between about 2 to about 6 bar. ### Claim 12 A process for the preparation of bromine-containing polyols wherein the occurrence of side reactions and the evolution of bromine are substantially suppressed, comprising the steps of homogeneously mixing and reacting a bromine-containing alcohol, an alkylene oxide, one or more H-functional compounds and a catalyst to form a bromine-containing polyol and separating the resulting bromine containing polyol from the resulting by-products, if any. ### Claim 13 (depends on 12) A process for the preparation of bromine-containing polyols as defined in claim 12, wherein said catalyst comprises alkaline and Lewis-acid catalysts. ### Claim 14 (depends on 12) A process for the preparation of bromine-containing polyols as defined in claim 12, wherein the alkaline catalyst used is an alkali metal hydroxide and/or alkali metal salt. ### Claim 15 (depends on 12) A process for the preparation of bromine-containing polyols as defined in claim 12, wherein the Lewis-acid catalyst used is boron trifluoride. ### Claim 16 (depends on 12) A process for the preparation of bromine-containing polyols as defined in claim 12, wherein said bromine-containing alcohol is selected from the group consisting of aliphatic compounds having branched and/or unbranched carbon chains, brominated phenols and mixtures thereof. ### Claim 17 (depends on 12) A process for the preparation of bromine-containing polyols as defined in claim 12, wherein said H-functional compounds are selected from the group consisting of low molecular weight polyfunctional alcohols, sugar alcohols, reaction products of polyfunctional and/or sugar alcohols with alkylene oxides, and mixtures thereof. ### Claim 18 (depends on 12) A process for the preparation of bromine-containing polyols as defined in claim 12, wherein said steps of reacting and mixing a bromine-containing alcohol is carried out at a temperature of between about 50.degree. to about 140.degree. C. ### Claim 19 (depends on 12) A process for the preparation of bromine-containing polyols as defined in claim 12, wherein the step of reacting a bromine-containing alcohol, an alkylene oxide, one or more H-functional compounds and a catalyst is carried out at a pressure of between about 2 to about 6 bar.