Unsaturated Polyester Resin for
Vacuum Molding Processes
TYPICAL CAST MECHANICAL PROPERTIES* (1) see back page
Test Units of Measure Nominal ISO Methods
Tensile Strength MPa 61 ISO 527-1
Tensile Modulus GPa 3.8 ISO 527-1
Tensile Elongation % 1.8 ISO 527-1
Flexural Strength MPa 103 ISO 178
Flexural Modulus GPa 4.1 ISO 178
Heat Distortion Temperature C @264 psi 89 ISO 75-A
*Typical properties are not to be construed as specifications.
Altek
R937 Series
Polyester Resin
DESCRIPTION
Altek R937 Series is a pre-promoted,
non thixed, low shrinkage medium
reactivity polyester resin designed
specifically for use in Vacuum Molding
Processes such as Infusion, SCRIMP,
LRTM and CCBM.
APPLICATION
R937 Series is designed for fabrication
of nacelles, rotors, nose cones and
ventilation boxes and other composite
parts.
BENEFITS
Designed for rapid and thorough
wet out of glass fibers
Low shrinkage for improved
surface cosmetics
Moderate exotherm
Excellent mechanical properties
featuring high heat distortion
temperature
TYPICAL LIQUID RESIN PROPERTIES at 25 C see back page (2)
Test Units of Measure Nominal
Viscosity, Brookfield LV
Spindle #2 @60 rpm cps 155
Styrene Content % 35
100g, Gel Time
@ 2% Trigonox 44B minutes 17.0
Gel to Peak minutes 15.0
Peak Exotherm C 188
Note: As all Vacuum Molding processes
are under Closed Mold Classifications,
these are “environmentally friendly”.
Product Information
Pub. No. Chem-AOC-R937 Series Copyright 2010, AOC, LLC Effective Date: April 2010
Altek
R937 Series
Polyester Resin
ISO 9001:2008 CERTIFIED
T h e Q u a l i t y M a n a g e m e n t
Systems at every AOC manufacturing
facility have been certified as meeting ISO
9001:2008 tandards. This certification
recognizes that each AOC facility has an
i n t e r n a t i o n a l l y a c c e p t e d
model in place for managing and
assuring quality. We follow the
practices set forth in this model to add
value to the resins we make for our
customers.
FOOTNOTES
(1)
Based on tests at 77 F/25 C and 50% relative
humidity. All tests performed on unreinforced
cured resin castings. Thixotropic components,
if applicable, are excluded from casting samples.
Castings prepared using 1.25% M-50, 0.25%
Cobalt 6% and post cured for 5 hours at 100 C.
(2)
The gel times shown are typical but
may be affected by catalyst, promoter and
inhibitor concentrations and resin, mold
and shop temperature. Variations in gelling
characteristics can be expected between
different lots of catalysts and at extremely
high humidities. Pigment and fillers can
r e t a r d o r a c c e l e r a t e g e l a t i o n . I t i s
recommended that the fabricator check the
gelling characteristics of a small quantity
of resin under actual operating conditions prior
to use.
PERFORMANCE GUIDELINES
A. Keep full strength catalyst levels
between 1.0% – 2.0% (1.25% minimum
with mechanical application) of the total
resin weight.
B. Maintaining shop temperatures
between 65 F/18 C and 90 F/32 C and
humidity between 40% and 90% will
help the fabricator make a high
quality part. Consistent shop conditions
contribute to consistent gel times.
STORAGE STABILITY
Resins are stable for three months from
date of production when stored in the
original containers away from sunlight
at no more than 70 F/21 C.
During the hot summer months, no more
than two months stability at 86 F/30 C
should be anticipated.
After extended storage, some drift may
occur in gel time.
SAFETY
See appropriate Material Safety Data
Sheet for guidelines.
Global Contacts
Australia
australia@aoc-resins.com
Middle East
middleeast@aoc-resins.com
Latin America
latinamerica@aoc-resins.com
Africa
africa@aoc-resins.com
AsiaAustralia
asia@aoc-resins.com
Europe
europe@aoc-resins.com
North America
northamerica@aoc-resins.com
Toll Free: +1 (866) 319-8827
www.aoc-resins.com
The infor mation contained in this data sheet is based on laboratory data and field experience .
We believe this infor mation to be reliable, but do not guarantee its applicability to the user s
process or assume any liability for occurrences ar ising out of its use. The user, by accepting
the products described herein, agrees to be responsible for thoroughly testing each such
product before committing to production.
Our recommendations should not be taken as inducements to infringe any patent or violate
any law, safety code or insurance regulation.