Patents by Inventor Siegfried Pfabe

Siegfried Pfabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4286004
    Abstract: The present invention relates to rendering antistatic polyurethane foams, particularly polyurethane foams which are used as textile coating such as carpet backings. The antistatics are terminally esterified or etherified polyalkylene oxide adducts of the general formulaR--(CHR'--CH.sub.2 O)n--CHR'--CH.sub.2 R"in which R and R", which can be identical or different, denote a linear or branched alkoxy radical with 1 to 22 C atoms, an alkylaryloxy radical with 10 to 18 C atoms, an acyloxy radical with 1 to 18 C atoms or a halogen radical, R' denotes hydrogen or a methyl radical, and n denotes a whole number between 2 and 20. The antistatic finishing of the polyurethane foams is preferably effected by addition of the alkylene oxide adducts to the starting materials of the polyurethane foam. Preferably, the antistatic agents are dissolved in the diol component of the polyurethane. The so finished polyurethane foams have an antistatic content of 5 to 30 weight % relative to the polyurethane.
    Type: Grant
    Filed: May 7, 1980
    Date of Patent: August 25, 1981
    Assignee: Chemische Fabrik
    Inventors: Kurt Dahmen, Siegfried Pfabe