The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 1989
Filed:
Oct. 22, 1987
Virgil Percec, Pepper Pike, OH (US);
Paul P Nicholas, Broadview Heights, OH (US);
Dana Garcia, Plainsboro, NJ (US);
The B.F. Goodrich Company, Akron, OH (US);
Abstract
Polyarylene polyethers ('PAPE') with vinyl chain ends may be crosslinked to form networks with excellent physical and chemical properties except they tend to be brittle. In particular, a polysulfone ('PSU' made from bisphenol A and dichlorodiphenyl sulfone) with vinylbenzyl chain ends ('di-VB-PSU') is too brittle for many applications where impact resistance is essential. This brittleness is combatted by inserting a thermally stable rubbery poly(dimethylsiloxane) ('PDMS') segment having a number average molecular weight in the range from about 600 to about 5000 connected to di-VB-PSU segments by hydrosilylation in the presence of a Pt catalyst, to form a thermoplastic linear predominantly triblock oligomer with vinylbenzyl chain ends which are thermally crosslinkable. When crosslinked, the network formed has improved impact resistance and toughness, with only a little loss in the upper glass transition temperature if the relative lengths of the PDMS and PAPE are such as to provide the desired degree of phase microincompatibility sufficient to improve toughness. The triblock may be blended with a polymer with which the triblock may be crosslinked upon curing. If the VB-PSU-PDMS-PSU-VB triblock is blended with di-VB-PSU the polyblend may be crosslinked to provide improved toughness.