Archive for the ‘White Papers’ Category

PRODUCT SPOTLIGHT: Urethane Dimethacrylate

Monday, June 10th, 2013
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Synonyms

Item Code: X-850-0000
Product Name: Urethane Dimethacrylate, UDMA, DUDMA, diurethane dimethacrylate
INCI: Di-HEMA Trimethylhexyl Dicarbamate

Our Urethane Dimethacrylate is a mix of isomers and is often used in light-cure systems. As a homopolymer, UDMA cures to form a hard, glassy surface that is low in color and bisphenol A free!  Various urethane dimethacrylates have been used in anaerobic adhesive applications. This material has also been referred to as diurethane dimethacrylate, DUDMA as well as Di-HEMA Trimethylhexyl Dicarbamate.

 

Performance Properties:

  • Fast curing
  • Low color
  • Customizable to meet your application

Typical Applications:

  • Light-curable, Dental Composite Base Resin
  • Predominant resin in UV-curable nail gels
  • Component in Anaerobic Adhesives
  • Energy-curable coatings

 

**** Contact Us FOR MORE INFORMATION OR SAMPLES! ****

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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: SILICA CONCENTRATES

Tuesday, July 10th, 2012
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Discussion:

To further assist our customers, Esstech, Inc. now offers “Silica Concentrates”.  Silica, also known as silicon dioxide, is often incorporated into dental and cosmetic formulations creating what are commonly referred to as “filled” systems.  Silicas, specifically, treated-fumed-silicas, are known for their ability to act as rheology modifiers.   Additional benefits of a filled vs. unfilled system include anti-sag application and enhanced strength.  In the rheology curves below (viscosity v. time), you can see the shear thinning effect of silica in a filled system as opposed to that of an un-filled system.  Viscosity is reduced as the shear stress is increased over time.

 

 

Unfortunately, incorporating silica into a formulation is difficult and time consuming.  If the silica is not uniformly dispersed, your formulation will suffer from shifting rheology.  In other words, the rheology of your formulation will change over time as the silica wets-out.

Esstech has the ability to uniformly disperse silica into the monomer (or monomers) of your choosing, creating a customized Silica Concentrate that can be incorporated into your formulation easily.  Contact us today to receive a sample of our Urethane Dimethacrylate-based Silica Concentrate, Product Code X-850-3044.  Or, our chemists can help you choose the best combination of monomers and silica for your formulation.

 

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EXOTHANE Elastomers Solvent Compatibility

Thursday, May 10th, 2012
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An Overview of Esstech, Inc.

Tuesday, August 10th, 2010
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Bisphenol A Content

Wednesday, June 2nd, 2010
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BisGMA, bisphenol A-glycidyl methacrylate is a common resin that carries trace amounts of BPA.  Bisphenol A (BPA) carries with it various risks recognized by the National Toxicology Program.

It is possible that high doses of bisphenol A during pregnancy and/or lactation can reduce survival, birth weight, and growth of offspring early in life.  BPA has also been shown to have estrogenic effects. *

According to internal analysis, Esstech’s bisGMA, Product Code X-950-0000, has one of the lowest BPA concentrations in the industry.

BPA Chart

EASE OF FORMULATION

To simplify formulations, X-950-0000 is available in pre-mixed solutions with Triethyleneglycol Dimethacrylate (TEGDMA).

BPA-FREE ALTERNATIVES

Esstech is constantly striving to provide customers with the most up-to-date and novel materials.  The f0llowing are resin “alternatives” that do not contain BPA.

X-850-0000, Urethane Dimethacrylate

  • Cures to create a hard glassy surface
  • Low color values
  • Excellent compatibility with light cure systems

X-726-0000, Extended UDMA

  • Increased flexibility
  • Enhanced fracture toughness

Esstech is constantly striving to provide customers with the most up-to-date and novel materials.  Contact us if you would like to discuss a certain material or to hear what we have in development.

* NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Bisphenol A.  National Toxicology Program, U.S. Department of Health and Human Services.  NIH Publication No. 08-5994, September 2008.


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DSS Silanated Glass Overview

Monday, April 12th, 2010
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Refractive Index of Methacrylate Monomers & Polymers

Thursday, March 11th, 2010
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TECHNICAL BULLETIN:  Refractive Index of Monomers and Their Respective Polymers

The refractive index (RI) of photopolymers is an essential property for many applications.  For optical and coating applications, the RI can be related to the resultant gloss or clarity upon cure.  Within the dental industry, the refractive index of the organic polymer matrix, must match that of the inorganic filler and substrate in order to avoid obvious “lines” where the product is applied.

Various factors affect refractive index values.  The presence of conjugated ring structures contributes to increasing RI.  In general, larger molecular weight monomers have a tendency to possess a higher RI in comparison to their lower molecular weight counterparts.  Similar to this trend, high molecular weight functional groups like methacrylates have higher RI than their acrylate counterparts. Higher atomic weight atoms also seem to be predisposed to having higher RI.

Recognizing the importance of refractive index to our customers, Esstech has assembled RI data for a portion of our existing monomer products as well as their corresponding homopolymers.

 Esstech Refractive Index Chart

Maintaining its position as an industry innovator, Esstech has also created functional, high refractive index materials.  Contact us to learn more about these novel materials and how Esstech can make a material to match your application.

 (P) 800-245-3800 / (P) 610-521-3800 / techsupport@esstechinc.com / www.esstechinc.com


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Esstech Inc. – Creating custom products & formulations to meet your unique needs!