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The effectiveness of toughening technologies on Multifunctional Epoxy Resin systems

Multifunctional Epoxy Resins have long been used where higher temperature performance and/or high modulus is required. These systems however are limited in their use because of their inherent brittleness. Improvement in toughness can be accomplished through a number of techniques, which are effective in difunctional and more linear systems such as those...
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Improved low temperature performance of Epoxy Adhesives

Epoxy adhesives are extremely brittle, and require a method of toughening for use in structural adhesives.  Traditional methods for toughening epoxy resins, such as the incorporation of carboxyl terminated butadiene acrylonitrile (CTBN) copolymers, give good room and elevated temperature toughening, but does not improve low temperature performance,...
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Fracture Toughness of Elastomer Modified, E-glass Reinforced Vinyl Ester Composites

Elastomer toughened epoxy resins with Hypro® CTBN and ATBN reactive liquid polymers are a well known technology to formulators of structural adhesives and matrix resins for composites. The phase separated rubber toughening technology associated with elastomer modification of epoxy resins is less familiar to those using vinyl ester resins. This...
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The Formulation and Evaluation of Water-Borne Epoxy Primers Based on Erisys GA-240 Water Soluble Epoxy Resin

A high gloss, exudate free, rapid dry, completely water soluble epoxy formulation based on the carboxylic acid salt of tetraglycidyl-meta-xylylenediamine and a variety of water based amine curatives is presented. Proposed water soluble formulation is similar in application and performance properties to that observed in solvent based systems. No coalescence or...
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ERISYS GE31 - A SAFER SOLUTION

Trimethylol Propane Triglycidyl Ether (TMPTGE) is currently classified as a CMR active compound under REACH regulation and hence there is a growing demand from the marketplace to find more suitable, safer alternative prod-ucts. Trimethylol Ethane Triglycidyl Ether (ERISYS™ GE 31) manufactured by CVC Thermoset Specialties (CTS), is a CMR label...
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Specialty Epoxy building blocks for demanding coating, adhesive applications

Presented at the Latin American Coating Show 2015. Conclusion: Utilizing specialty epoxy building blocks, formulators have the opportunity to increase or enhance key performance properties in coatings and adhesives, including chemical resistance, UV stability, work output at lower temperatures, and fracture toughness of brittle epoxy formulations, even...
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EPALLOY™ 7200X90 for Low VOC, Fast Cure Primer Applications

EPALLOY® 7200X90, a high solvent-diluted resin with fast cure properties, is ideally suited for evaluation as an additive to solid Bisphenol A resin compositions to provide high solids, VOC compliant formulations for primer applications.  The fast cure and low viscosity of this product will help to overcome limitations encountered with use of standard...
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Better bonding: Optimizing the use of reactive liquid polymers to Toughen Epoxies

Epoxy adhesives offer excellent properties but are intrinsically brittle due to their high crosslink density. To increase toughness, reactive liquid polymers (RLPs) are often added. Selection of the correct reactive end group is critical. New RLP chemistries are discussed that improve performance at room temperature and in low-temperature applications. CVC...
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Epoxy Resins from BioRenewable Raw Materials

The interest in converting biomass into chemicals has increased sharply over the last ten years within industrial companies. With this being the case, companies have changed direction, finding valuable markets outside of fuels and are opting for higher-margin products such as specialty chemicals. CVC Thermoset Specialty ( CTS) has invested in technology...
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Specialty Epoxy Resins, Tougheners and Curatives for Oil and Gas Pipeline Epoxy Coatings

CVC is committed to serving the pipe-coating industry, offering products, experience and technical support specifically designed for plant and field applied pipeline coatings and maintenance. The company has developed a portfolio of epoxy and related products designed to meet new stringent pipeline standards, especially for pipelines carrying oil and...
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A Safer Alternative Takes the Pressure out of Formulating Pressure-Sensitive Adhesives

Printed in Adhesives & Sealants Industry (ASI) Magazine and shared with permission. Crosslinkers are a critical part of the two-component package used to create acrylic, water-based PSAs. Polyfunctional aziridine (PFAZ) is a common choice due to its efficacy and economy, but it has been linked to mutagenicity, as well as relatively short...
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Improving Epoxy Coating Durability using Reactive Liquid Polymers

Printed in Paints & Coatings Industry (PCI) Magazine and shared with permission. Epoxy powder coatings are known for their excellent protective characteristics in applications such as pipeline coatings, electrical insulation coatings, appliance primers, automotive parts, and rebar coatings. The high crosslink density of epoxies is a double-edged...
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Exploring High Performance Polymers for Protective Coatings

CVC is committed to serving the pipe-coating industry, offering products, experience and technical support specifically designed for plant and field applied pipeline coatings and maintenance. The company has developed a portfolio of epoxy and related products. CVC Products: EPALLOY® 8240 ...
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Characteristics of Bis F and Phenol Novolac Epoxy Resins-Compositional differences & their effect on performance

Use of epoxy phenol novolacs including Bisphenol-F can greatly enhance the performance of corrosion resistant coatings and high temperature composites.  In selecting resins for these applications, it is important to understand the influence of functionality, advancement and their relationship on viscosity and EEW in formulating systems.  Failure to...
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Alternatives in Toughening: Presented at a meeting of the Thermoset Resin formulators association in Chicago, IL Tuesday, September 16, 2008

The impact of terminal and polymer backbone functionality on toughener effectiveness from the standpoint of glass transition temperature, and adhesive and structural properties were examined. Internal functionality included polybutadiene, polybutadiene/acrylonitrile, polyether, polyester and polyacrylate.  Terminal functionality included Bis-A epoxy...
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The Evaluation of Various Substituted Ureas as Latent Accelerators for Dicyandiamide Cured Epoxy Resin Formulations

This study deals with the evaluation of some common substituted ureas as DGEBA/dicy accelerators. United States patents covering the use of substitutedureas as accelerators began to appear in the late 60's. This work will help theepoxy formulator to decide which substituted urea, and what concentrationamount will work best to meet particular application...
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Recent advancements in Reactive Liquid Polymer Chemistry as New Tougheners for Epoxy Adhesives

Presented at China Adhesive 2015. Conclusions: CTB/CTBN combined adduct provides improved low temperature toughening while maintaining room temperature performance, does not phase separate, and results in less Tg decrease compared to traditional CTBN adduct. Glycidyl ester tougheners produce glycidyl ester with polybutadiene backbone directly and...

    Technical Service Resources

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    Hypro 1300X16 ATBN in Elastomeric Epoxies

    Hypro reactive liquid polymers (RLP) are recognized as tougheners for thermoset resins specifically of the epoxy variety. In such formulations these CTBN or ATBN liquid polymers typically would be used at a level of 10-20 phr (parts per hundred resin). The stress-strain properties associated with elastomer toughened epoxies don’t differ appreciably...
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    RLP090707 Hypro ATBN/Amine Compatibility Study

    Hypro ATBN reactive liquid polymers are amine terminated butadiene-acrylonitrile copolymers. An ATBN/amine compatibility study was conducted to determine the miscibility of several grades of ATBN with numerous generic amines used as curatives for epoxy resins. CVC Products: Hypro® 1300X35, Hypro® 1300X16, Hypro® 1300X21 Application: Adhesives, Coatings ...
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    RLP0901102 Hypro RLP & HyPox CTBN Modified Epoxies in 1 and 2-Part Adhesives

    There are two principal approaches to modifying one- and two-part component amine cured epoxy resins with Hypro reactive liquid polymers which are 1) ATBN added to amine hardener side and 2) HyPox CTBN/epoxy adducts added to the resin side. This document contains adhesives data based on elastomer modified epoxies employing these formulating concepts....
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    Hypro CTBN & HyPox RA840 & 1340 Toughened 2-Part Epoxy Adhesives

    Need file CVC Products: Hypox® RA840, Hypox® RA1340, Hypro® 1300X8, Hypro® 1300X13, EPALLOY® 7190 Application: Adhesives ...
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    HyPox RF Series Mechanical Properties Table

    Mechanical Properties of Liquid Rubber Modified Epoxidized Bisphenol F and Epoxidized Phenol Novolac Resins. CVC Products: EPALLOY® 8230, EPALLOY® 8240, EPALLOY® 8250, Hypox® RF928, Hypox® RF1320, Hypox® RF933 Application: Composites ...
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    HyPox RF Series Mechanical Properties Table

    Mechanical Properties of Liquid Rubber Modified Epoxidized Bisphenol F and Epoxidized Phenol Novolac Resins. CVC Products: EPALLOY® 8230, EPALLOY® 8240, EPALLOY® 8250, Hypox® RF928, Hypox® RF1320, Hypox® RF933 Application: Composites ...
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    Tg of EPALLOY 8240 and 8250 vs. iso Viscous Blends of Bis-F and EPN

    Evaluation results of the Tg of EPALLOY 8240 and 8250 vs. iso Viscous Blends of Bis-F and EPN. CVC Products: EPALLOY® 8240, EPALLOY® 8250 Application: Adhesives, Composites ...
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    Chemical Resistance Study, 7 days 25C cure, 28-day RT Immersion

    Chemical resistance study of EPALLOY® 8230, ERISYS® RDGE, ERISYS® GE-30, EPALLOY® 8250, and ERISYS® RN-25. CVC Products: EPALLOY® 8230, ERISYS® RDGE, ERISYS® GE-30, EPALLOY® 8250, ERISYS® RN-25 Application: Coatings ...
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    ERISYS® GA-240 as Cross Linker for Pressure Sensitive Adhesives

    Water based pressure sensitive adhesives (PSA’s) are used for a variety of products which include tapes, labels and protective films.  The functionalized acrylic resins in many of these adhesives require use of cross linkers in order to control tack and adhesion.  While Polyfunctional Aziridines (PFAZ) are more common, epoxies can also be utilized...
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    RLP090710 New CTBN-Epoxy Adduct Technology, HyPox RA16213

    Emerald Performance Materials has developed technology in reactive liquid polymers epoxy adduct syntheses.  These adducts do not separate when diluted with standard DGEBA. CVC Products: Hypro® 1300X13, Hypro® 2000X162 Application: Adhesives ...
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    EPALLOY 7200 for use as an Accelerator in Elevated Temperature Cure Epoxy Systems

    Epalloy 7200 has been shown to provide enhanced cure of resin formulations designed for ambient and sub-ambient temperature cure. Unmodified aromatic and cycloaliphatic amines designed for elevated temperature cure were tested to see if Epalloy 7200 would accelerate cure. CVC Products: EPALLOY® 7200 Application: Adhesives, Coatings ...
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    Flexibilizing Modifiers

    The primary objective of this report is to discuss the various types of Flexibilizing Modifiers available from CVC. Secondarily, we will discuss curing agent selection, the differences between flexibilization and toughening, and will show data and trends one can expect to see with our various flexibilizing modifiers. CVC Products: Hypox® DA323, ERISYS® GE-23, ERISYS® GE-24, ERISYS® GE-35, ERISYS® GE-35H, ERISYS® GE-36, ERISYS® GS-120 Application: Adhesives, Coatings, Composites ...
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    Formulation + Evaluation of Water-Borne Epoxy Primers with GA-240 Water Soluble Epoxy Resin

    The purpose of this study was to obtain a controlled comparison of the Erisys GA-240 water soluble epoxy resin technology and competitive water-borne epoxy-amine cured technologies when utilized in corrosion inhibitive primer formulations. CVC Products: ERISYS® GA-240 Application: Adhesives, Coatings ...
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    OMICURE 33DDS Optimal Combining Ratio in LER with and without BC-120

    To determine the optimal level of Omicure 33DDS to use with standard liquid epoxy (LER; EEW = 185-190) and to further define the optimal level of use when using Omicure BC120 as accelerator. Optimal levels will be determined by measuring the Tg of cured samples. CVC Products: Omicure® 33-DDS, Omicure® BC-120 Application: Composites ...
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    Epalloy 9000 vs Competitive Multifunctional Resins for Increased Tg

    These data clearly indicate the trend that EPALLOY® 9000, when used as a modifier for standard LER will provide formulated systems with lower viscosity and higher Tg as compared with other high performance multifunctional resins. CVC Products: EPALLOY® 9000 Application: Adhesives, Coatings, Composites ...
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    Epalloy 7200 as Alternative to Acrylate-Modified Epoxy Resin

    Epoxy Resins are sometimes modified with acrylate monomers such as Trimethylolpropane Triacrylate (TMPTA) to help provide formulated adhesives, coatings, and patching compounds with rapid cure and/or the capability to cure at very low temperatures. The viscosity of some acrylated systems are quite low due to the diluting effect of the low viscosity...
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    Epalloy 7200 Compared to Polymercaptan Cure

    Epoxy formulators use a variety of methods to accelerate cure of standard Liquid Epoxy Resin (LER) to provide products for low temperature and/or fast cure applications. One such example would be the use of polymercaptans for fast cure adhesives. However, polymercaptans have some undesirable side effects, including odor, poor water resistance, and high...
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    Compare reactivity, viscosity stability, Tg, of BC-120 against BF3-Amine Complexes

    Information was lacking on the comparative properties of Omicure™ BC-120 vs. the more widely used BF3-Amine Complexes. BCl3 and BF3 are in a class of curing agents known as Lewis Acids. Both are gaseous under standard temperature and pressure conditions. Complexes are made to provide liquid or solid forms under conditions of normal use. When heated,...
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    Tg of Low Viscosity Novolacs – EPALLOY 8330, ERISYS GE-30

    Identify a resin blend with viscosity below 5000 cps (@52°C) with Tg of 150 or better. Previous experience has shown ERISYS GE-30 is best to maximize Tg retention at low viscosity. Evaluate Tg of low viscosity novolacs and similar blends of EPALLOY 8330 and GE-30. CVC Products: EPALLOY® 8230, ERISYS® GE-30 Application: Adhesives, Coatings ...
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    Erisys GA240 vs Competitive Glycidyl Amines – Performance Comparison

    To compare basic performance properties when using Erisys GA240 (tetra-glycidyl m-xylene diamine) as a primary resin against competitive high performance multifunctional glycidyl amines in the form of tetra glycidyl methylene dianiline (TGMDA) and tri-glycidyl para-amino phenol (TGAP). CVC Products: ERISYS® GA-240 Application: Composites ...
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    Advantages of OMICURE U-52 as an Accelerator fo Dicy Cured Epoxy Systems

    Omicure U-52 is an aromatic substituted urea designed for use as a latent accelerator in one part,dicyandiamide (dicy) cured, epoxy formulations. Dicy will work, on its own,  as a curing agent for epoxies, showing good latency and cured physical properties that are acceptable for many applications. However, cure temperatures in excess of 1700C are...
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    ERISYS GE-22 in isocyanate-Jeffamine polyurea to slow reaction rate

    The laboratory attempted to prepare samples of GE-22S blended with aliphatic isocyanate Desmodur N-3300 and cured using Jeffamine D-2000. The GE-22S was expected to slow the reaction between the isocyanate and amine, lengthening the pot life of the mixtures. CVC Products: ERISYS® GE-22 Application: ...
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    High Tg Epoxy Formulations Based on Modified + Unmodified EPALLOY EPN

    Tg evaluation results for epoxy formulations based on modified and unmodified Epalloy EPN. CVC Products: EPALLOY® 8330, Omicure® 24EMI, ERISYS® RN-3650 Application: Adhesives, Coatings ...
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    Chemical Resistance of EPN with Cycloaliphatic Curing Agents

    Chemical Resistance results of EPN with Cycloaliphatic Curing Agents, Comparison of weight loss, and surface integrity in HC Systems. CVC Products: EPALLOY® 8230, ERISYS® GE-30, ERISYS® RDGE Application: Coatings ...
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    Comparison of the handling properties and Tg of EPALLOY 8250 and EPON 160

    Comparison of the handling properties and Tg of EPALLOY™ 8250 and EPON(1) 160. CVC Products: EPALLOY® 8250 Application: ...
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    CTBN Modified Hybrid Epoxy Powder Coatings

    CTBN was employed in the scheme of epoxy-polyester powder coating to feature excellent gravelometer or chip resistance. Elastomer (CTBN) modified chip resistant coating had superior properties to liquid polyurethane anti-chip coatings. CVC Products: Hypro® 1300X8 Application: Coatings ...
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    Acceleration of LER by ERISYS GE-60

    Blends of GE-60 at 5, 10, 20 and 30% were prepared with 7190. At approximately 25°C DEH-24 (TETA) was added to each resin. Unaccelerated 7190 was used as a control. 20g of each mixture were poured into aluminum dishes. CVC Products: ERISYS® GE-60 Application: Adhesives, Coatings ...
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    Hardness Development of Bis A Bis A-F and Bis F Epoxy Resin

    The hardness development of 8230 and 9237-70 formulations, within the first 17 hours after mixing, is slower than that of the other evaluated formulations. The 8230 and 9237-70 formulations require another 24 hours of room temperature cure time to approximate the hardness of the other evaluated systems. Pot life, cure rate by loss of enthalpy and uncured...
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    Reactive Liquid Polymer Modified Epoxy Powder Coatings

    Reactive liquid polymers commonly used in the thermoset resin industry are carboxyl terminated butadiene-acrylonitrile (CTBN) copolymers. In a continuous epoxy matrix CTBN will form a discontinuous secondary phase resulting in an elastomer toughened thermoset epoxy.1,2 A considerable amount of research has taken place in academia and industry over...
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    Solid Epoxy-CTBN Adduct Toughened Dicy Cured LER, RK84L

    Examine a solid epoxy/CTBN adduct as a toughener in an accelerated dicyandiamide cured epoxy composition. Use fracture mechanics in defining toughness by determining G1c (critical strain energy release rate or energy per unit area of crack surface). Additionally provide a complete mechanical properties profile on the bulk specimens as well as Tg (glass...
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    ERISYS GE-60 as a Cross Linker with Rohm & Haas PARALOID 1285, High Performance Maintenance Coating

    ERISYS GE-60 was screened as a cross linking agent in a high solids industrial maintenance coating based on Paraloid AE-1285 from Rohm and Haas. ERISYS GE-60 is an aliphatic, multifunctional, epoxy resin based on sorbitol. It is designed to impart high reactivity and cross link density to traditional epoxy resin formulations. It will also react with...
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    ERISYS GA-240 vs. Aziridine Cross Linkers for Polyurethane Dispersions

    In this study, a water-based polyurethane (Neo Rez R-960, supplied by Zeneca Resins) was selected for evaluating ERISYS GA-240 as a potential room temperature crosslinker. It was compared with the uncrosslinked resin and resin crosslinked with Zeneca’s polyfunctional aziridine CX-100. Various concentrations of crosslinker in an air-dried system...
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    Evaluate OMICURE U-24 as Dicy Accelerator in Powder Coating Formulation

    Evaluate OMICURE U-24 as an accelerator for dicyandiamide in powder coating formulations. Compare to a typical starting point formulation of Epon 2002 / Epi-Cure P-101. CVC Products: ERISYS® GE-60, Omicure® DDA10 Application: Coatings, Adhesives, Composites ...
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    ERISYS GE-60 as a Cross Linker for Acid Functional Acrylic Solution Resin

    ERISYS GE-60 was evaluated in two high gloss enamel starting point formulations 17-0884-A and 10-0509-B. Both formulations used ERISYS GE-60 cut in appropriate solvent as part of a two part coating system. Panels were sprayed and air dried for seven days then tested for corrosion resistance under salt spray, chemical resistance to MEK rub, and retention...