All specifications and properties specified above are approximate. Specifications and properties of material delivered may vary slightly
from those given above. Interplastic Corporation makes no representations of fact regarding the material except those specified above.
No person has any authority to bind Interplastic Corporation to any representation except those specified above. Final determination of
the suitability of the material for the use contemplated is the sole responsibility of the Buyer. Our technical sales representatives will
assist in developing procedures to fit individual requirements, but all advice is accepted at your risk and should be checked for
suitability to your particular processes. These test data and properties are based on results obtained for a specific material under the
specified test conditions. They are not to be used as specifications and are not warranted as performance attributes for any product or
system. Specifications and properties of standard production material may vary slightly from those in this report. Interplastic
Corporation makes no warranties regarding any material and/or samples described in this report unless that representation is provided
to your company in writing by a Technical Director of Interplastic Corporation or one of his or her managers.
INTERPLASTIC CORPORATION
2015 Northeast Broadway Street
Minneapolis, Minnesota 55413-1775
651.481.6860 Fax 612.331.4235
www.interplastic.com
Revised: 9/16
CORVE8441B is a promoted, thixotropic, corrosion resistant, fire retardant, vinyl ester resin that meets the Flame Grade
A, Physicals Grade A, and Electrical Class O requirements of MIL-R-21607E (SH) and is on the QPL-21607-29 list. This
product also meets the Grade B and Class 1 and Class 2 requirements of MIL-R-24719 (SH).
RELATED PRODUCTS GEL TIME
CORVE8441BW 8-12 Minutes
CORVE8441BS 25-30 Minutes
LIQUID PROPERTIES RESULTS
Viscosity, Brookfield Model LV #3 Spindle @ 60 rpm, 77 F (25 C), cPs 450-550
Thixotropic Index 1.6-2.0
100 grams resin @ 77 F (25 C), initiated with 1.2cc MEKP-925H *
Gel Time, min:sec 15:00-20:00
Gel to Peak Exotherm Time, min:sec 12:00-17:00
Peak Exotherm 320-350 F (160-176 C)
Non-Volatile Content, % 57.0-62.0
Hazardous Air Pollutant (Styrene) Content, % 38.0-43.0
Acid Value (solids) 10-17
Specific Gravity 1.13-1.16
TYPICAL PROPERTIES
Thickness 1/8 inch (3.2 mm) Casting
Construction Not Applicable
Flexural Strength, ASTM D790 16,600 psi 115 MPa
Flexural Modulus, ASTM D790 4.7 x 10
5
psi 3,241 MPa
Tensile Strength, ASTM D638 11,700 psi 81 MPa
Tensile Modulus, ASTM D638 4.8 x 10
5
psi 3,331 MPa
Tensile Elongation, ASTM D638 4.5 % 4.5 %
Barcol Hardness, 934-1 gauge, ASTM D2583 40 40
Heat Distortion Temperature, ASTM D648 230 F 110 C
* Gel time and reactivity will vary due to the type and concentration of Free Radical Initiator (catalyst), shop temperature, humidity, and type of fillers used. In order to meet
your individual needs consult our technical sales representative for assistance. If using methyl ethyl ketone peroxide (MEKP) to gel and cure CoREZYN vinyl ester
resins, we recommend only these three brands: Cadox L-50a (Akzo Nobel); Luperox DHD-9 (Arkema); and Norox MEKP-925H (United Initiators). These must be
used at the appropriate percentage and suitable temperature. Contact your Interplastic Corporation representative for assistance.
TYPICAL FLAME TEST PROPERTIES
Thickness 1/8 inch (3.2 mm) Laminate
Construction 4 Plies 1.5 oz/ft
2
, 33% Glass Mat
ASTM D635, Horizontal Burn Rate < 1
ASTM E84, Flame Spread 26.2
ASTM E84, Smoke Density 1,288
UL 94 (This is not to imply UL warranty) (V-O) (HB < 1 ) (5V Pass)
HLT 15 100
CORVE8441B
Thixotropic Vinyl Ester Resin
Technical Data Sheet