Patents by Inventor Tony Blixt

Tony Blixt 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).

  • Sizing composition, a method for the preparation thereof and a method of use
    Patent number: 4964915
    Abstract: The present invention relates to a novel sizing composition in the form of an aqueous emulsion comprising a hydrophobic cellulose reactive sizing agent and a cationic polymer comprising a starch, the novel features of said composition being that the starch possesses a combination of (A) a branched, high molecular weight structure as reflected by an amylopectin content of at least 85% and (B) a degree of substitution of about 0.045 to 0.40.Such sizing compositions can be prepared by dissolving the aforementioned starch in water, adjusting the temperature to above the melting point of the sizing agent and adding the sizing agent to the solution so as to form a coarse emulsion, which is subsequently subjected to shear forces to reduce the particle size of the emulsion.The invention also relates to a method of preparing sized paper or paperboard by using the abovementioned sizing composition. Also, the invention relates to the sized paper for paperboard prepared by said method.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: October 23, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Tony Blixt, Philip Hakansson