| 摘要 |
There is at least 3% by wt. of one or more aromatic phosphorous compounds having a viscosity at 40 deg. C of 200-300 cSt (esp. 400-700 cSt). Optionally there is a mineral oil extract having a viscosity at 135 deg. C of at least 4 cSt. The composition has a viscosity at 135 deg. C of at least 80 cSt esp. at least 140 cSt. |
