Posts Tagged ‘PMGDM’

High-Purity Adhesive Monomers

Friday, March 9th, 2012
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Manufacturing quality adhesive components requires raw materials of uncompromising purity. Their multiple applications place a considerable burden on their performance. The challenge is further heightened by the difficulty in synthesizing these molecules. These unique materials are capable of bridging the gap between hydrophilic and hydrophobic substrates.

 

X-863-0050:  NTG-GMA Sodium Salt

  • CAS # 133736-31-9

The sodium salt of N-tolylglycine glycidyl methacrylate is an adhesive that bridges the gap between hydrophobic and hydrophilic substrates. Na Salt of NTG-GMA is TSCA listed and can be solubilized in acetone.

X-863-0070: NTG-GMA Magnesium Salt

  • CAS # 211810-95-6

The Magnesium Salt of this surface active monomer (NTG-GMA) offers double the functionality as the sodium salt of NTG-GMA along with improved color.

The sodium salt and magnesium salt of NTG-GMA are both adhesion promoting monomers that also function as a co-initiators due to their tertiary aromatic amine group.

X-865-0000:  PMDM

  • CAS # 51156-91-3

Pyromellitic Dimethacrylate has the ability to bond to various substrates when used alone or in conjunction with our Sodium or Magnesium NTG-GMA salts. Bis(2-Methacryloyloxyethyl) Pyromellitate is TSCA listed and promotes adhesion between metal and plastic substrates in anaerobic adhesives.

X-830-0100:  PMGDM

  • CAS # 148019-46-9

Pyromellitic glycerol dimethacrylate is now available without any diluent.  To use this neat material, simply add the desired quantity into the diluent of your choosing or directly into your formulation.  PMGDM, also known as Bis (Glyceryl Dimethacrylate) Pyromellitate, can make an ideal adhesive system using its’ four methacrylate groups and two carboxylic acid groups to bond to various substrates.

 

 

 

 


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Phosphate Adhesive Breakthrough

Tuesday, May 10th, 2011
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ADHESIVE MONOMERS

Esstech has long been the single source for many acclaimed adhesive components.  Our catalog continues to grow, offering customers a variety of formulating options, including:

  • PMDM, pyromellitic dimethacrylate, X-865-0000
  • NTG-GMA, Na Salt of n-Tolylglycine Dimethacrylate, X-863-0050
  • NTG-GMA, Mg Salt of n-Tolylglycine Dimethacrylate, X-863-0070
  • PAMM, MEP, Methacryloyloxyethyl Phthalate, X-821-2000
  • Methacryloyloxyethyl Maleate, X-846-0000
  • PMGDM, Pyromellitic Glycerol Dimethacrylate, X-830-0100

PHOSPHATE PROGRESS

Soon, Esstech will announce new Adhesive Monomers of our own design.  Available to all in industry, these patented materials are based on high-demand chemistries such as:

  • Monofunctional Methacrylate Phosphates
  • Multifunctional Methacrylate Phosphates
  • Phosphate Oligomers

Contact us directly for additional information or to discuss your specific adhesive requirements.  Call us at 1-800-245-3800 or 610-521-3800.  You can also send your request to techsupport@esstechinc.com.
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Esstech products can be sourced to our European customers via our affiliate, Esschem Europe at www.esschem-europe.com.


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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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PMGDM / UDMA Used in Remineralization Applications

Friday, September 10th, 2010
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Effects of adhesive, base and diluent monomers on water sorption and conversion of experimental resins

Sabine H. Dickens, Glenn M. Flaim, Cynthia J.E. Floyd

Dental Materials Volume 26, Issue 7, Pages 675-681 (July 2010)

Objectives: To establish the relationship of resin composition and resin hydrophilicity (indicated by solubility parameters and logP) to water sorption (WS), solubility, and degree of double bond conversion (DC) of resin mixtures designed for adhesive restoratives by varying the concentration of pyromellitic glycerol dimethacrylate (PMGDM) and various co-monomers.

Methods: Sixteen resin mixtures were prepared with (30–70) mass fraction % PMGDM. At given PMGDM concentrations there were up to five compositions with increasing logP. Polymer disks (13mm×0.7mm) were exposed to 96% relative humidity (RH) to determine water sorption in humid atmosphere (WSH) and subsequently immersed in water for immersion water sorption (WSI) and solubility. DC was assessed by near infrared spectroscopy.

Results: WSI was somewhat higher than WSH, which ranged from (2.1 to 5.3) mass fraction %. Both data were positively correlated to PMGDM concentrations [Pearson correlation, p<0.02; R2=0.74, 0.73 (WSI)] and solubility (R2=0.64), but not to logP. When grouped by structural similarities, i.e., base resins with bisphenol A core (Group B), Group O containing diluent monomers, or Group U containing urethane dimethacrylate, WS within each group was inversely correlated to logP with R2=0.98, 0.81, 0.95, and WS/solubility correlation improved with R2=0.88, 0.92 and 0.75, respectively. Solubility ranging from 0.3% to 2.3% was inversely related to DC (r=−0.872). Conversion ranging from 41% to 81% was lower for resins with high base monomer concentrations and highest in mixtures with UDMA.

Significance: LogP was a good predictor of WS after grouping the resins according to functional, compositional and structural similarities. WS and conversion were reasonably well predicted from Hoy’s solubility parameters and other physical resin properties.

Link:  http://www.demajournal.com/article/S0109-5641%2810%2900066-7/abstract


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