Posts Tagged ‘tertiary amine’

Dental Photoinitiators

Friday, March 8th, 2013
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Simply described, photoinitiators are chemicals that generate radicals upon exposure to light.  A more complete description would include all the complexities inherent with the chemical nature of photoinitiators including type, concentration and absorptivity.  All of these factors must be taken into consideration when optimizing a light-curable formulation.

With PL Industries, the new division of Esstech Inc., we can now provide the monomers, adhesion promoters, oligomers, photoinitiators and technical expertise to guide you in your material selection.  The following is an example of our photoinitiator products.

 

PL-CQ
Camphorquinone
Absorption Range:  400-550 nm, 470 nm peak

Description:  Type II, fine yellow powder, very common and effective for dental restoratives, heat aids in dissolution

PL-TPO
2,4,6-Trimethylbenzoyl-diphenylphosphine oxide
Absorption Range: 230-430 nm, 385 nm peak

Description:  Type I, off-white, crystalline powder, dissolves in most monomers, exhibits photo-bleaching properties

PL-PPD
1-Phenyl 1,2-propanedione (PPD)
Absorption Range:  300-480 nm, 393 nm peak

Description:  Type II, yellow liquid, believed to have a lower rate of polymerization that is not detrimental to overall conversion

PL-EDB
Ethyl-4-dimethylamino benzoate
(EDAB, EDMAB)

Description:  a tertiary amine synergist typically used in combination with type II photoinitiators such as PL-CQ

X-866-0000
Dihydroxyethyl-para-toluidine
(DHEPT)

Description:  solid, off-white amine co-initiator that is low in color, requires melting or crushing to simplify incorporation

X-867-0000
2-dimethylaminoethyl methacrylate
(DMAEMA, MADAME)

Description:  a clear, colorless liquid used as an amine synergist for type II photoinitiators, commonly used in 1:2 ratio with CQ

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

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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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