Process for the preparation of silicone compounds
View Patent ↗A process for preparing a silicone compound, the process comprising reacting (A) a silicon compound having silicon-bonded alkoxy groups or silicon-bonded aryloxy groups and (B) a disiloxane in the presence of (C) a carboxylic acid, (D) an acid catalyst, and (E) a carboxylic anhydride, and a process for preparing a silicone compound, the process comprising reacting (F) a silicon compound having silicon-bonded acyloxy groups and (B) a disiloxane compound in the presence of (D) an acid catalyst, (E) a carboxylic anhydride, and (G) an alcohol.
1. A process for preparing a silicone compound, the process comprising reacting (A) a silicon compound having silicon-bonded hydrolyzable groups selected from the group consisting of (i) alkoxy groups and (ii) silicon-bonded aryloxy groups and (B) a disiloxane compound having the formula:
wherein R is an unsubstituted or substituted monovalent hydrocarbon group or a hydrogen atom, in the presence of (C) a carboxylic acid, (D) an acid catalyst, and (E) a carboxylic anhydride.
2. The process according to claim 1 , wherein the mole ratio of component (B) to the hydrolyzable groups of component (A) is from 0.5 to 1.0.
3. The process according to claim 1 , wherein the acid catalyst is selected from the group consisting of hydrochloric acid, sulfuric acid, and a perfluoroalkanesulfonic acid.
4. The process according to claim 1 , wherein the carboxylic anhydride is selected from the group consisting of acetic anhydride and propionic anhydride.
5. The process according to claim 1 , wherein the mole ratio of component (E) to component (C) is from 0.5 to 1.0.
6. The process according to claim 1 , wherein component (E) is added while component (A) and component (B) are reacting in the presence of component (C) and component (D).
7. A process for preparing a silicone compound, the process comprising reacting (F) a silicon compound having silicon-bonded acyloxy groups and (B) a disiloxane compound having the formula:
wherein R is an unsubstituted or substituted monovalent hydrocarbon group or a hydrogen atom, in the presence of (D) an acid catalyst, (E) a carboxylic anhydride, and (G) an alcohol.
8. The process according to claim 7 , wherein the mole ratio of component (B) to acyloxy groups of component (F) is from 0.5 to 1.0.
9. The process according to claim 7 , wherein the acid catalyst is selected from the group consisting of hydrochloric acid, sulfuric acid, and a perfluoroalkanesulfonic acid.
10. The process according to claim 7 , wherein the carboxylic anhydride is selected from the group consisting of acetic anhydride and propionic anhydride.
11. The process according to claim 7 , wherein the mole ratio of component (E) to component (G) is from 0.5 to 1.0.
12. The process according to claim 7 , wherein component (E) is added while component (F) and component (B) are reacting in the presence of component (G) and component (D).