Posts Tagged ‘Adhesive Monomer’

PRODUCT SPOTLIGHT: HEMA Succinate

Thursday, April 11th, 2013
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Item Code:  X-753-0000

Product Name: Methacryloyloxyethyl SuccinateHEMA Succinate
CAS#: 20882-04-6

EC No: 244-096-4
INCI: HEMA Succinate

SYNONYMS:  mono-2-(Methacryloyloxy)ethyl Succinate, 4-(2-(methacryloyloxy)ethoxy)-4-oxobutanoic acid

HEMA succinate is a carboxylic acid-containing methacrylate that functions as an adhesion promoter in a variety of applications.  X-753-0000 demonstrates an affinity toward bonding with aluminum, cold rolled steel, stainless steel and tin-free steel when cured “neat” or when formulated with one of our urethane acrylates such as EXOTHANE 108.

HEMA succinate’s low viscosity makes it an an easy to incorporate and reactive diluent.  Its’ monomethacrylate functionality allows it to promote adhesion in soak-off or temporary systems while improving “removability”.

Contact us directly to discuss your application and request samples, techsupport@esstechinc.com.

 

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Achieving Adhesion to Metal Substrates

Monday, March 11th, 2013
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Thank you to everyone who visited us at uv.eb WEST 2013 in Redondo Beach, CA. 

Copies of our presentation, “Sticking to the Principles, Achieving Adhesion to Metal Substrates” are now available upon request.  We look forward to continuing your interesting conversations.

Contact Us to request more information at techsupport@esstechinc.com .

 

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Product Spotlight: “Solid” Urethanes

Wednesday, November 28th, 2012
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In our pursuit of new and innovative materials, Esstech has created an experimental line of “solid” urethanes.  These materials are solid at room temperature, resembling glass both in appearance and the ability to fracture easily into a powder upon impact.  Here are more of our initial observations:

  • Easy to incorporate into a powder coating once fractured.
  • Extrude well under normal conditions and can be ground, sieved or sprayed.
  • Create very clear and colorless coatings.
  • Cured materials have excellent solvent resistance, flexibility and adhesion to polycarbonate and ABS.

 

Esstech offers a multitude of monomers including acrylates, methacrylates, diluents, crosslinkers, oligomers and more!  Contact us to discuss sourcing of existing commercial products or custom development.

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Contact us to request samples and/or additional information regarding any of our products.
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PRODUCT SPOTLIGHT: HEMA Maleate

Friday, November 11th, 2011
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Item Code: X-846-0000X-846-0000, HEMA Maleate

Product Name: Methacryloyloxyethyl Maleate
CAS#: 51978-15-5

EINECS(I): 257-569-5
INCI: HEMA Maleate

HEMA maleate is a carboxylic acid-containing methacrylate that can function as an alternative to PMDM. It has been used in anaerobic adhesive applications and is approved for use in cosmetic products.

The carboxylic acid group of X-846-0000 has the ability to improve adhesion to keratin.  Its’ monomethacrylate functionality allows it to be incorporated into soak-off systems without detriment to “removability”.  HEMA maleate’s low viscosity also makes it an ideal, reactive diluents.

Contact us directly to discuss your application and request samples, techsupport@esstechinc.com.


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Optimal Diluent and Base Methacrylate Combinations

Thursday, September 15th, 2011
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Influence of the base and diluent methacrylate monomers on the polymerization stress and its determinants

N. R. G. Fróes-Salgado, L. C. Boaro, B. Pick, C. S. Pfeifer, C. E. Francci, M. M. Méier, R. R. Braga.  Journal of Applied Polymer Science.

Overview:

The correct pairing of methacrylate diluents and resins can optimize properties like polymerization stress, volumetric shrinkage, degree of conversion, maximum rate of polymerization, and elastic modulus in composite formulations.

Abstract:

The aim of this study was to evaluate the effect of the association between bisphenol-A diglycidyl dimethacrylate (BisGMA) or its ethoxylated version (BisEMA) with diluents derived from the ethylene glycol dimethacrylate (EGDMA), with increasing number of ethylene glycol units (1: EGDMA, 2: DEGDMA, 3: TEGDMA, or 4: TETGDMA), or trimethylol propane trimethacrylate (TMPTMA) or 1,10-decanediol dimethacrylate (D3MA) on polymerization stress, volumetric shrinkage, degree of conversion, maximum rate of polymerization (Rpmax), and elastic modulus of experimental composites. BisGMA containing formulations presented lower shrinkage and stress but higher modulus and Rpmax than those containing BisEMA. TMPTMA presented the lowest stress among all diluents, as a result of lower conversion. EGDMA, DEGDMA, TEGDMA, and TETGDMA presented similar polymerization stress which was higher than the stress presented by D3MA and TMPTMA. D3MA presented similar conversion when copolymerized with both base monomers. The other diluents presented higher conversion when associated with BisEMA. EGDMA showed similar shrinkage compared with DEGDMA and higher than the other diluents. The lower conversion achieved by TMPTMA did not jeopardize its elastic modulus, similar to the other diluents. Despite the similar conversion presented by D3MA in comparison with EGDMA and DEGDMA, its lower elastic modulus may limit its use. Rather than proposing new materials, this study provides a systematic evaluation of off the shelf monomers and their effects on stress development, as highlighted by the analysis of conversion, shrinkage and modulus, to aid the optimization of commercially available materials. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011


LINK:  http://onlinelibrary.wiley.com/doi/10.1002/app.34947/full

Article first published online: 1 SEP 2011.  DOI: 10.1002/app.34947


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Optimal Solvent Ratio for Adhesive Systems

Wednesday, June 1st, 2011
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Hybridization morphology and dentin bond stability of self-etch primers with different ethanol/water ratios

Silvia T. Fontes, Giana S. Lima, Fabrício A. Ogliari, Evandro Piva and Rafael R. Moraes

Odontology, DOI: 10.1007/s10266-011-0030-5

Abstract


This study evaluated the influence of ethanol/water ratios on the bond strength to dentin of experimental two-step, self-etch adhesive systems. Self-etch primers were prepared with constant 40 mass % of solvents. The ethanol/water ratios tested were 7:1 (P1), 3:1 (P2), and 1:1 (P3); primers with only ethanol (PE) or water (PW) as solvent were also tested. The bond strength to the dentin was investigated through a microtensile bond strength test. Resin–dentin beam-shaped specimens were obtained and tested after 24 h, 6 months, and 1 year of storage in water at 37°C. The hybridization morphology was analyzed using SEM. For bond strength at 24 h, PE = P1, P1 = P2, and P2, P3 and PW > PE. After 6 months, PE = P1 < P2, P3 and PW. After 1 year, no significant differences among the materials were detected. No significant differences among the periods were detected for PE. For P1, 24 h > 6 months = 1 year. For P2, P3 and PW, 24 h = 6 months > 1 year. For PE and P1, adhesive failures were predominant at 24 h, mixed or adhesive failures after 6 months, and premature debonding was predominant after 1 year. For P2, mixed failures were predominant at 24 h and 6 months, and premature debonding after 1 year. For P3 and PW, mixed failures were predominant at all storage periods. The SEM analysis revealed no clear differences in the hybridization patterns yielded by the water-based primers; PE showed formation of irregular resin tags.
Odontology 123 Page 6. Acknowledgments This study was partially supported by grant #04/ 1374.1 from the FAPERGS, Brazil. The authors also thank Esstech, Inc. for donating the reagents used in the present investigation


LINK:  http://www.springerlink.com/content/84hl1518hl85023w/

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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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4-META Improves Adhesion in Bonding Systems

Monday, January 17th, 2011
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Effect of etchant variation on wet and dry dentin bonding primed with 4-META/acetone

N. Nakabayashi, K. Hiranuma

In the paper referenced, a 4-META based adhesive proves effective in improving monomer impregnation of demineralized dentin resulting in improved adhesion.

Abstract

Objective: To collect data that explains the advantage, if any, of wet bonding versus dry bonding to dentin, and to more clearly understand the mechanism of wet bonding.

Methods: Bovine dentin samples were prepared with #600-grit paper and were divided into four groups of six each. The first six specimens were etched with 10% citric acid and 3% ferric chloride for 10s then rinsed and blot-dried (Gr. 1: 10-3:W). The second six were etched with 10% citric acid and 3% ferric chloride then rinsed and air-dried (Gr. 2: 10-3:D). The third six were etched with 10% citric acid for 10s, rinsed and blot-dried (Gr. 3: 10-0:W). The fourth group of six samples was etched, rinsed and air-dried (Gr. 4: 10-0:D). All groups were primed with 5% 4-methacryloyloxyethyl trimellitate anhydride (4-META) in acetone for 60s and an acrylic rod was bonded to the samples using a 4-META/methyl methacrylate (MMA)-tri-n-butyl borane (TBB) resin. The samples were fashioned into dumbbell-shaped specimens and stressed in tension until bond failure, to determine tensile bond strengths. Fractured surfaces were examined by scanning electron microscopy.

 

Significance: Effective dentin bonding depended upon the etchants employed. 10-0 etching and air-drying caused the demineralized dentin to collapse in which case wet bonding became necessary to obtain good TBS data. The specimens demineralized with 10-3 did not collapse, even when air-dried; consequently both wet and dry bonding proved effective for obtaining high tensile bond strength data.

LINK:  http://www.demajournal.com/article/S0109-5641%2800%2900017-8/abstract


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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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