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:
Apr. 07, 2009
Filed:
Nov. 27, 2006
Lemuel O. Granada, Jr., Manistee, MI (US);
James Innes, Mount Vernon, WA (US);
David Morgan Smith, Kearneysville, WV (US);
Mark Wajer, Nottingham, MD (US);
Lemuel O. Granada, Jr., Manistee, MI (US);
James Innes, Mount Vernon, WA (US);
David Morgan Smith, Kearneysville, WV (US);
Mark Wajer, Nottingham, MD (US);
Martin Marietta Materials, Inc., Raleigh, NC (US);
Abstract
The invention provides a submicron magnesium hydroxide particulate composition comprising a first distribution of magnesium hydroxide particles having a D50 of no more than about 0.30 μm, a D90 of no more than about 1.5 μm, and a BET surface area of at least about 35 m/g, which can be used as a flame-retardant additive for synthetic polymers, optionally in combination with other flame-retardant additives such as nanoclays and larger-sized magnesium hydroxide particulate compositions. Polymeric resins comprising the submicron magnesium hydroxide particles and methods of manufacturing submicron magnesium hydroxide particles are also provided.