Method for the continuous preparation of liquid silicone rubber base
US6218466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2383/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is provided that can very rapidly produce a liquid silicone rubber base in which even microfine electrically conductive filler with specific surface of at least 0.5 m.sup.2 /g will be homogeneously dispersed in liquid organopolysiloxane without small lump or clump formation. The method for the continuous preparation of liquid silicone rubber base, including the steps of PA0 continuously supplying to a continuous mixing apparatus PA1 (A) 100 weight parts polyorganosiloxane that has a viscosity at 25.degree. C. of 100 to 500,000 mPa.multidot.s comprising at least 2 silicon-bonded alkenyl groups in each molecule, PA1 (B) 0 to 200 weight parts electrically nonconductive inorganic filler, and PA1 (C) 0.1 to 700 weight parts electrically conductive filler with a specific surface of at least 0.5 m.sup.2 /g PA2 wherein the combined quantity of components (B) and (C) is from 5 to 700 weight parts PA1 where the continuous mixing apparatus has a cylindrical body casing with a material feed opening at the top of the body casing, a mixture discharge outlet at the bottom of the body casing, and a rotating disk within the casing such that the ratio of the diameter of the rotating disk to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.