Brominated pentaerythritolic polyesters and process therefor专利检索-氢溴酸酸，碱，盐，酸酐和碱专利检索查询-专利查询网

Brominated pentaerythritolic polyesters and process therefor

阅读：997发布：2023-07-15

专利汇可以提供Brominated pentaerythritolic polyesters and process therefor专利检索，专利查询，专利分析的服务。并且A variety of brominated polyester resins using pentaerythritol as one of the components are prepared by the novel process of brominating the pentaerythritol concurrently with polyester formation under conditions whereby generation of large amounts of waste hydrobromic acid is avoided, process steps are saved, and technical grade pentaerythritol can be used, all of which results in large energy savings. The resins which are made by this process include brominated saturated and unsaturated polyester resins, and vinyl ester resins.，下面是Brominated pentaerythritolic polyesters and process therefor专利的具体信息内容。

权利要求

1. A PROCESS FOR PREPARING BROMINATED PENTACERYTHRITOLIC POLYESTERS COMPRISING REACTING PENTAERYTHRITOL WITH HYDROGEN BROMIDE AND A DICARBOXYLIC ACID HAVING AT LEAST 4 CARBON ATOMS IN THE MOLECULAE, IN THE LIQUID PHASE, AT A TEMPERATURE OF FROM ABOUT 85* TO ABOUT 220*C., THE WATER PRODUCED IN THE REACTIONS BEING REMOVED AT SUCH A RATE THAT THE WEIGHT RATIO OF HYDROGEN BROMIDE TO WATER IN THE REACTION MIXTURE IS AT LEAST ABOUT 0.9 UNTIL THE HYDROBROMINATION IS SUBSTANTIALLY COMPLETE, AT A MOLE RATIO OF HYDROGEN BROMIDE TO PENTAERYTHRITOL OF FROM 1.8. 1 TO ABOUT 2.4 TO 1.

2. The process of claim 1 wherein the reaction mixture is contacted with up to about 0.80 mole of a saturated monocarboxylic acid per mole of pentaerythritol.

3. The process of claim 1 wherein the dicarboxylic acid has from 4 to 20 carbon atoms in the molecule.

4. The process of claim 1 wherein the dicarboxylic acid consists at least in part of maleic acid.

5. The process of claim 1 wherein the temperature is from about 115* to about 190*C.

6. The process of claim 1 wherein the water produced in the reactions is removed from the reaction mixture so that the hydrogen bromide to water weight ratio remains above about 1.2.

7. The process of claim 1 wherein the dicarboxylic acid comprises maleic and phthalic anhydride.

8. The process of claim 2 wherein the monocarboxylic acid is acetic or propionic and is used in a mole ratio to pentaerythritol of from about 0.08 to 1 to about 0.40 to 1.

9. The process of claim 1 wherein the pentaerythritol contains dipentaerythritol.

10. The process of claim 1 wherein the dicarboxylic acid consists of a saturated aliphatic acid having up to 20 carbon atoms in the molecule and wherein after the hydrobromination reaction is substantially complete, alcohols or glycols having up to 10 carbon atoms in the molecule are added to the reaction mixture.

11. The process of claim 1 wherein after the hydrobromination reaction is substantially complete, glycols having up to 10 carbon atoms in the molecule are added to the reaction mixture to produce a polyester having both ends capped by a hydroxyl, and acrylic or methacrylic acid is added to the reaction mixture to react with the end capping hydroxyls.

12. A brominated pentaerythritolic polyester made by the process of claim 7.

13. A brominated pentaerythritolic vinyl polyester made by the process of claim 11.

14. A brominated pentaerythritolic plasticizer made by the process of claim 10.

15. The process of claim 1 wherein an inert solvent is added to the reaction mixture.

16. The process of claim 15 wherein the inert solvent is selected from the group consisting of perchloroethylene, water, xylene, toluene, ethylene dibromide, ethylene dichloride, tetrachloroethane, 1,2-di-chloroethane and chlorobenzene.

17. The process of claim 16 wherein the solvent is perchloroethylene or water.

18. The process of claim 1 wherein the dicarboxylic acid comprises maleic and tetrahydrophthalic anhydride.

19. The process of claim 1 wherein the dicarboxylic acid comprises maleic and tetrachlorophthalic anhydride.

20. The process of claim 1 wherein the dicarboxylic acid comprises maleic and chlorendic anhydride.

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Brominated pentaerythritolic polyesters and process therefor

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