| 摘要 |
<p>There is provided by the present invention a process for producing a solventless silicone resin having a viscosity at 100% varying from 200 to 5,000 centipoise at 25 DEG C., comprising adding a mixture of water and alcohol to the desired organochlorosilanes taking the silicone alkoxylate and washing it repeatedly with alcohol until the acid content is at least below 1000 parts per million, adding an alkali metal hydroxide to reduce the acidity of the silicone alkoxylate such that it does not exceed 100 parts per million, and then adding sufficient water such that the amount of water that is added is between 0.2 to 0.8 moles of water per mole of hydrocarbonoxy radicals in such silicone hydrolyxate. The excess alcohol and water is stripped off to give the solventless silicone resin of the instant invention having an organo to Si ratio varying from 1.1 to 1.9, having a silanol content varying from 1 to 4% by weight and a hydrocarbonoxy content that varies from 7 to 14% by weight.</p> |
