Process for imparting antistatic properties to plastics
CA 1073582 A · Owner: Hoechst Aktiengesellschaft · Inventors: Mietens, Gerhard; Schallus, Erich; Dany, Franz-Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR IMPARTING ANTISTATIC PROPERTIES TO PLASTICS ABSTRACT OF THE DISCLOSURE:, Antistatic properties are imparted to plastics by blending a pulverulent plastics material and if desired, further addends, with conductive carbon black and making the resulting blend into a moulding composition. The plastics are more particularly blended with 4 to 12 weight % of conductive carbon black having a water absorption stiffness (AS-number) of 15 to 35, a specific electric resistance of 10-1 up to 10-3 ohms . cm under a moulding pressure of 100 to 180 atmospheres absolute a bulk den-, sity of 100 to 180 g/liter a BET-surface area of 100 to, 1000 m2/g. The carbon black is made by a process wherein …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 11, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.