Interplastic Corporation makes no warranties regarding any material and/or samples described in this report. All properties
specified above are approximate and may vary from material delivered. Delivered material complies with the certificate of
analysis on each shipment of product. Interplastic Corporation makes no representations of fact regarding the material
except those specified above. Final determination of part or application and 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 as a customer accommodation, but all advice is accepted at your risk and should be checked for
suitability to your particular processes and needs. 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.
INTERPLASTIC CORPORATION
2015 Northeast Broadway Street
Minneapolis, Minnesota 55413-1775
651.481.6860 Fax 612.331.4235
www.interplastic.com
Revised: 8/16
CORVE8129
Thixotropic Vinyl Ester Resin
Technical Data Sheet
CORVE8129 is a promoted, thixotropic, vinyl ester resin used in spray-up and hand lay-up applications. It is specifically
formulated for the boat, pool, spa manufacture, and may also be used in other applications that require high physical
properties and excellent fatigue performance.
FEATURES BENEFITS
Moderate Laminate Exotherm Good cosmetic surface and minimal glass print
Fast Trim Time Shorter cycle time and fast Barcol development
Good Fiberglass Wet-Out Easy roll-out and high laminate physical properties
Promoted for Ease of Application Good gelation properties with low foaming quality
Excellent Fatigue Performance 1 Long service life for composites under loading
Low Water Absorption and Excellent Blister Resistance 2 Eliminates need for repairing blisters in composites
immersed in water
Retention of Physical Properties after Immersion in Water
for 15 Years 3
Minimal to no loss of physical properties after long term
exposure to water
RELATED PRODUCTS GEL TIME MEKP Level, % by weight
CORVE8115 10-15 Minutes 1.2
CORVE8117 15-20 Minutes 1.2
CORVE8119 20-25 Minutes 1.2
CORVE8121 25-30 Minutes 1.2
CORVE8123 32-37 Minutes 1.2
LIQUID PROPERTIES RESULTS
Viscosity, Brookfield Model LV, #3 Spindle @ 60 rpm, 77 F (25 C), cPs 475-675
Thixotropic Index 2.5-3.2
100 grams resin @ 77 F (25 C), initiated with 1.4% MEKP-925H by weight *
Gel Time, min:sec 35:00-45:00
Gel to Peak Exotherm Time, min:sec 10:00-20:00
Peak Exotherm 300-370 F (149-188 C)
Non-Volatile Content, % 51.0-56.0
Specific Gravity 1.00-1.03
TYPICAL PROPERTIES
Thickness 1/8 inch (3.2 mm) Casting 1/8 inch (3.2 mm) Laminate
Construction Not Applicable 4 Plies 1.5 oz/ft
2
, 33% Glass Mat
Flexural Strength, ASTM D790 19,000 psi 131 MPa 32,600 psi 225 MPa
Flexural Modulus, ASTM D790 4.7 x 10
5
psi 3,240 MPa 11.0 x 10
5
psi 7,586 MPa
Tensile Strength, ASTM D638 11,800 psi 81 MPa 16,300 psi 112 MPa
Tensile Modulus, ASTM D638 4.0 x 10
5
psi 2,760 MPa 11.0 x 10
5
psi 7,586 MPa
Tensile Elongation, ASTM D638 4.5 % 4.5 % 2.0 % 2.0 %
Barcol Hardness, 934-1 gauge, ASTM D2583 34 34 47 47
Heat Distortion Temperature, ASTM D648 210 F 99 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 (Nouryon); Luperox DHD-9 (Arkema); or Norox MEKP-925H (United Initiators). These must be used at the
appropriate percentage and suitable temperature. Contact your Interplastic Corporation representative for assistance.
1. Cycle Test Evaluation of Various Polyester Types and a Mathematical Model for Projecting Flexural Fatigue Endurance
2. A 15-Year Study of the Effective Use of Permeation Barriers in Marine Composites
3. Physical Properties Evaluation of FRP Composites after 15-Year Immersion in Water