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Cycloaliphatic Epoxy Resins
GPE Series
Product Technology, Curatives & Applications
Gabriel Performance Products
Cycloaliphatic Epoxy Resins (CER)
Outline Technology Features/Benefits - Value Products Activators/Hardeners Markets/Applications
GPE Series
Cycloaliphatic Epoxy Resins (CER)
Technology
CERs - Different from Standard Bisphenol-A Epoxy Resins like DER 331, EPON 828
Standard Epoxy resins made from Epichlorohydrin and Bisphenol-A
CERs are made by oxidation of Cyclo Olefins with Peracetic Acid
Different from other cycloaliphatic epoxy resins like Glycidyl Esters of Pthalic Acids (Huntsman CY 184) and Hydrogenated Bis A Epoxy Resins (CVC Epalloy 5000 and Hexion Epon 1110)
CER Technology
Standard Epoxy Resin :
Epichlorohydrin + Bisphenol-A Std. Epoxy Resin
(DER 331, EPON 828)
Technology
Epichlorohydrin
Bisphenol-A
Cycloaliphatic Epoxy Resin :
Cyclo Olefin + Peracetic Acid GPE-221
Technology
Cyclo Olefin
Peracetic Acid
GPE-221
Cycloaliphatic Epoxy Resins (CER)
Features/Benefits -
Value Proposition
Aliphatic Backbone – Excellent UV Stability
Saturated Cyclic Ring – Good Weatherability and Excellent Electrical Properties
High Epoxide Content High Crosslink Density High Tg and Heat Distortion Temp. (HDT)
No Epichlorohydrin No Hydrolysable Chorine Low Dielectric Constant Excellent Arc-Track Resistance
Feature/Benefits - Value
Short Chain – Low Viscosity 350cp of GPE-221 vs. 13000 cp Std Epoxy Resin Easy to handle and enable VOC Free or Low VOC Formulations
When combined with Polyols, result in Good Combination of Toughness and Heat-Distortion Temperature Properties
No Epichlorohydrin Low Potential for Skin Sensitization
Offer latitude to formulate 1K or 2K Products
Feature/Benefits - Value
Cycloaliphatic Epoxy Resins (CER)
GPE Products
GPE Series - Products
GPE-221 : Standard, General Purpose Use Cycloaliphatic Epoxy Resin Equivalent to ERL-4221 (Cyracure UVR-6110)
GPE-226 : Distilled, Low Ionic Content and Low Viscosity Cycloaliphatic Epoxy Resin Equivalent to ERL-4221D (Cyracure UVR-6105)
GPE-228 : Flexible Cycloaliphatic Epoxy Resin Equivalent to ERL-4299 (Cyracure UVR-6128)
ERL & UVR from Dow Chemical - Discontd.
GPE Series - Properties
Property\Product GPE-221 GPE-226 GPE-228
AppearanceColorless to Pale Yellow Liquid
Colorless to Pale Yellow Liquid
Colorless to Pale Yellow Liquid
Color (Pt-Co) 100 max 50 max 150 max
Viscosity, cP 350 - 450 200 - 350 500 - 650
EEW 131 - 143 128 - 140 190 - 210
Moisture (wt%) <0.05 <0.05 <0.05
Cycloaliphatic Epoxy Resins (CER)
Activators/Hardeners
Anhydrides
Polyacids
UV Cationic Cure Catalysts
Not ‘Amines’ or ‘Polyamides’
Activators/Hardeners
Anhydrides
2K Thermal Cure OR Heat Cure
Requires Heat to Cure
HHPA (Hexa HydroPthalic Anhydide), MTHPA, NMA
Typical Cure Cycle – 1 HR @ 100 -120 oC + 4 - 6 HR @ 160 -180 oC
Cure Cycles vary with different Anhydrides
Activators/Hardeners
Anhydride Cured CERs
Excellent High Temperature Performance
Tg : 150 – 200oC
High Mechanical Properties - Flexural Strength, Compressive Strength
Excellent Dielectric Properties
Superior Arc, Corona and Tracking Resistance
Eg: Fiber Reinforced Composites
Activators/Hardeners
Polyacids
2K Ambient Cure
Acid Functional Polyesters, Carboxylic Acids, Pthalic Acids
Slow Reaction Rates
Takes several days to cure
Less Common in Use
Activators/Hardeners
UV Cationic Cure Catalysts
Cationic Photoinitiators
“Aryl Sulfonium” and “Aryl Iodonium” Salts
Activated by UV Light Generate a Super Acid
Super Acid catalyzes epoxy polymerization
Rapid Cure Rates, in some cases Instant
Activators/Hardeners
UV Cationic Cure Catalysts
Alternate technology to Free Radical Polymerization of Acrylates
Low Shrinkage – up to 5%, compared to Acrylate Shrinkage of 10- 15%
Excellent Adhesion
Low Viscosity Low or No VOCs
Low Capital and Operating Costs
Excellent Hardness and Flexibility
Activators/Hardeners
Cycloaliphatic Epoxy Resins (CER)
Markets/Applications
CERs have Excellent UV and Weatherability, Low Viscosity, High Temperature Performance, Excellent Electrical Properties and other…….But
Complex Mfg Process
High Product Costs
$ 6 - 10/lb vs $1 – 2/lb of Standard Epoxy Resin
Used in High Performance Requirement Markets/Applications
Value to the Market
Markets/Applications
2K
ANHYDRIDE CURE
Markets/Applications
2K
ANHYDRIDE CURE
Markets/Applications
2K
ANHYDRIDE CURE
Markets/Applications
1K UV CURE
Markets/Applications
1K UV CURE
Markets/Applications
1K UV CURE
Acid Scavenger - Stabilizer
CERs react with both organic and mineral acids
Use to remove or stabilize Acids in Systems
Eg: Transformer Fluids
Lubricating Oils and Hydraulic Fluids
Markets/Applications
1K ADDITIVE
Markets/Applications
1K ADDITIVE
Other Uses:
Modifier for Std Epoxy Resins, Viscosity Reduction, Performance Enhancement
Waterborne – Stable Anionic Dispersions
Chemical Intermediates – to make alkyd coating resins
Markets/Applications
1K ADDITIVE
