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:
Mar. 19, 2013
Filed:
Nov. 02, 2009
Stephen J. Bennison, Wilmington, DE (US);
Richard Allen Hayes, Beaumont, TX (US);
Steven C. Pesek, Orange, TX (US);
W Alexander Shaffer, Orange, TX (US);
Charles Anthony Smith, Vienna, WV (US);
Stephen J. Bennison, Wilmington, DE (US);
Richard Allen Hayes, Beaumont, TX (US);
Steven C. Pesek, Orange, TX (US);
W Alexander Shaffer, Orange, TX (US);
Charles Anthony Smith, Vienna, WV (US);
E I du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A laminate comprises an ionomeric interlayer sheet which, in turn, comprises or is prepared from a sodium/zinc mixed ionomer that comprises carboxylate groups and a combination of counterions that consists essentially of sodium cations and zinc cations. The sodium/zinc mixed ionomer is the neutralization product of a precursor acid copolymer. The precursor acid copolymer comprises copolymerized units of an α-olefin and an α,β-ethylenically unsaturated carboxylic acid, and it has a melt flow rate of about 70 to about 1000 g/10 min. In addition, the precursor acid copolymer, when neutralized to a level of about 40% to about 90%, and when comprising counterions that consist essentially of sodium ions, produces a sodium ionomer that has a freeze enthalpy that is not detectable or that is less than about 3.0 j/g, when determined by differential scanning calorimetry.