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HAR Introduces 2 Epoxy Resins at the TRFA Annual Meeting

Published on 2011-10-21. Author : SpecialChem

COTTAGE GROVE, WI -- Hydrite Advanced Resins, LLC (HAR) introduced two new epoxy resins for a wide range of composites, coatings and adhesive applications at the recent 2011 Thermoset Resin Formulators Association (TRFA) Annual Meeting in Niagara Falls, Canada.

Two grades of Resorcinol Diglycidyl Ether (RDGE), a DIFUNCTIONAL Aromatic resin, are now offered by HAR.

HAR 2120 has properties that are similar to other commercial RDGE resins, including a relatively low viscosity (500-1,000 cps), making it an excellent choice as a reactive additive to reduce viscosity while enhancing physical properties.

HAR 2140 is a higher molecular weight RDGE with viscosity of 3,500-4,500 cps enabling the formulator to use HAR 2140 in higher concentrations or even as the sole resin system. In addition, unlike HAR 2120 and other commercial RDGE resins, HAR 2140 will not crystallize in storage eliminating the need for heated storage and/or melting ovens.

Both grades provide many advantages, including:

  • High Cross Link Density upon Curing
  • Exceptional Chemical Resistance
  • Superior Adhesion to Wide Variety of Substrates
  • Enhances physical properties of DGEBA

RDGE BACKGROUND

While several mono-functional aromatic resins are available (e.g. cresyl glycidyl ether), RDGE is one of very few DI-FUNCTIONAL aromatic epoxy resins. As a result of this di-functional aromatic structure, cured resin formulations exhibit relatively high cross-link density which enhances many key physical properties such as dimensional stability, toughness and surface hardness. RDGE and formulations with RDGE can be cured with virtually all common curing systems often with reduced curing times and temperatures.

CHEMICAL RESISTANCE

Most notably, properly cured RDGE exhibits exceptional chemical resistance. This includes resistance to a wide variety of alkali, acids and solvents - including concentrated sulfuric acid and methylene chloride - both which are considered a challenge to most epoxy based systems. HAR laboratories have conducted chemical resistance testing using a variety of hardeners and curing conditions. Results are available on HAR’s website.

PHYSICAL PROPERTIES

HAR 2140 cured with Air Products AMICURE® PACM cycloaliphatic amine for 6 hours at 90°C exhibited a tensile strength 30% greater than similarly cured DGEBA (Dow Chemical DER®331). A blend of 30% HAR 2140 with DGEBA increased the tensile strength of the DGEBA by 20%.

HYDRITE ADVANCED RESINS LLC

Hydrite Advanced Resins began operations last year at a new $7MM Epichlorohydrin Derivatives plant located at Hydrite Chemical’s Cottage Grove (Madison), Wisconsin, site. Consistent with Hydrite’s established practices, the design and operation of the expansion meets or exceeds industry safety and quality standards.

Source: HAR


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