Patents by Inventor Rong-Hwa Chang

Rong-Hwa Chang 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).

  • Polyphenylene sulfide composition with improved crystallizing characteristic
    Patent number: 5340861
    Abstract: A rapidly crystallizing polyphenylene sulfide composition for reducing duration of injection molding cycle which comprises (a) a polyphenylene sulfide represented by the formula: ##STR1## and (b) an organometallic compound represented by the formula:R'--O--M--(Q--R").sub.3wherein M is either titanium or zirconium; R' is a substituted or un-substituted alkyl group having a carbon number of 1 to 30; Q is an SO.sub.3 group and R" is an alkyl group having a carbon number of 1 to 25, or an aryl-alkyl group represented by the following formula: ##STR2## wherein R is an alkyl group having a carbon number of 1 to 25.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: August 23, 1994
    Assignee: Industrial Technology Research Institute
    Inventors: Chi-Hwang Chen, Chih-Cheng Chiang, Bin-Yuan Lin, Rong-Hwa Chang