Tetrahydrofuran → CID 3084433

Temperature

10 °C

In the same reaction apparatus as in Example 1, a solution prepared by dissolving 0.82 g of potassium borofluoride in 105 g of 25% fuming sulfuric acid was drowpise added to 500 g of tetrahydrofuran at -10° C. over a period of 40 minutes, and thereafter the mixture was subjected to reaction at -10° C. for one hour. The tetrahydrofuran conversion at the end of this reaction was 38%. Then, the reaction mixture was heated to 10° C. and further subjected to reaction for 2 hours. The conversion at the end of this reaction was 60%. Neither solidification nor coloration of the reaction system was observed in the entire course of the reaction. The polymerization product was then treated in the same manner as in Example 1 to obtain colorless PTMG. Its analytical results and the catalytic efficiency α were as shown in Table 1.

1. customIn the same reaction apparatus as in Example 1, a solution prepared
2. customthe mixture was subjected to reaction at -10° C. for one hour
3. customfurther subjected to reaction for 2 hours
4. customNeither solidification nor coloration of the reaction system was observed in the entire course of the reaction
5. additionThe polymerization product was then treated in the same manner as in Example 1

ORD record

ord-9ea3de2b5b874751a319a4a5a95402fb

Source dataset

uspto-grants-1983_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04371713