Posts Tagged ‘pyromellitic’

Improved PMGDM Adhesive Monomer

Friday, March 18th, 2011
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Advancing adhesive monomer technology, Esstech announces a New and Improved generation of PMGDM adhesive monomer products.

  • Non-stop supply for over 10 years
  • Exclusive product stability
  • NEW 100% solids product

The 1993 invention of PMGDM (pyromellitic dianhydride glycerol dimethacrylate) by Venz and Dickens is famous in the dental industry, yet the material was perishable.  Our current material has a stable shelf life and is available in 3 formulations:

  • X-830-0100: 100% solids, easy to ship globally, dilute in your preferred solvent
  • X-830-0036: 36% solids in acetone
  • X-830-0050: 50% solids in acetone

Esstech would like to send you free information and samples for your evaluation. Call us at 1-800-245-3800 or 610-521-3800 to get yours today! You can also send your request to techsupport@esstechinc.com.


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PMGDM Patented as Adhesion Promoter in Nail Systems

Monday, November 8th, 2010
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METHOD OF PROMOTING ADHESION TO KERATINACEOUS SURFACE, USE OF SAME IN RESHAPING SURFACE, AND KIT THEREFOR

Inventors: George F. Cowperthwaite, Coatesville; Allen D. Johnston, West Chester, both of Pa.; Susan C. Sheariss, Swedesboro, N.J.

Assignee: Esschem, Inc., Linwood, Pa.
Appl. No.: 09/061,948

INVENTION

This invention relates to a method for improving the adhesion of monomeric and/or polymeric materials to keratinaceous substrates which substrates contain a major amount of alpha-keratin. An aspect of this invention relates to methods for reshaping essentially rigid keratinaceous surfaces such as nail plates wherein adhesion of the reshaping material is improved through the use of an adhesion promoting treatment. Still another aspect of this invention relates to a kit for nail reshaping (e.g. nail extension) which includes an adhesion-promoting composition.

A method for improving-with an adhesion-promoting composition-adhesion of a synthetic monomeric or polymeric material (such as a curable acrylic monomer/polymerized acrylic system) to a keratinaceous substrate, as in, for example, the reshaping of fingernails or toenails. The adhesion-promoting composition comprises (A) an organic, dipolar, aprotic liquid carrier and, uniformly distributed throughout said liquid carrier, (B) pyromellitic dianhydride glycerol dimethacrylate adduct (“PMGDM”). The PMGDM
isomer mixture which typically results when pyromellitic dianhydride is reacted with glycerol dimethacrylate is preferred, particularly in view of its high solubility in solvents of relatively low toxicity (e.g. lower aliphatic
ketones). The adhesion-promoting composition can, if desired, be included in a nail-reshaping kit containing the materials and implements needed to reshape the nail plate.

LINK:  http://www.freepatentsonline.com/6015549.html


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