Mexichem Specialty Resins, Inc.
TECHNICAL ASSISTANCE BRIEF
NUMBER:
023
EQUILIBRIUM MOISTURE PICK-UP OF GEON 137
Summary:
The equilibrium moisture pick-up of Geon™ 137 resin, when exposed to 80% humidity at
95F, was measured to be around 0.40 - 0.45%. Approximately 4 hours of elapsed time
was required to reach equilibrium conditions.
Discussion:
Geon™ 137 is more hygroscopic than other Geon resins. The equilibrium moisture of Geon ™
137 was measured in the laboratory by exposing the resin samples to 80% humidity at
95F. The equilibrium moisture was found to be approximately 0.45% (Table 1). The resin
samples, after they were exposed to the above conditions, were measured for their effect on
Brookfield viscosity. The higher moisture was found to reduce Brookfield viscosity by
approximately 10-20%.
Four samples of Geon™ 137, stored in the warehouse at Pedricktown, NJ during
January/February, were also measured for moisture pick-up. The results are shown in the
attached Table. All four samples had shown moisture pick-up, and one of the four samples
showed moisture pick-up from 0.113% to 0.482%.
Based on the results, it is evident that by the time the customer receives the resin
shipment, the moisture level of Geon® 137 will be higher than reported on the Certificate of
Analysis (COA).
GEON™
TABLE I
137 MOISTURE PICK-UP
Sample of Geon™ 137 (Lot #5709051
Fisher)*
Exposed @95°F And 80%
Humidity
% Water (Karl
Sample #1
Sample #2
0
Hour
0.15
0.05
1
Hour
0.34
0.32
2
Hours
0.36
3
Hours
0.34
4
Hours
0.41
6
Hours
0.44
0.39
24
Hours
0.44
0.41
96
Hours
0.41
0.45
0.40
Mexichem Specialty Resins, Inc.
*Average of Two Determinations
Sample #1 as is
Sample #2 Dried in Oven at 120F for 1 Hour
GEON™
TABLE II
137 RESIN EXPOSED AT 80% HUMIDITY 95°F
Sample of Geon™ 137 (Lot #5709051)
Brookfield Viscosity
Control
4-Hours
Initial
2 RPM
10 RPM
7,400
9,380
6,000
7, 460
6,800
8,040
One Day
3 RPM
20 RPM
7,800
10,360
6,800
7,760
7,000
8,460
7-Days
2 RPM
20 RPM
8,400
11,080
6,400
8,240
7,000
8,800
© Mexichem Specialty Resins, Inc. 2013
The information contained herein is believed to be reliable, but no representations, guarantees or warranties of any kind are made as to its accuracy, suitability
for particular applications or the results to be obtained therefrom. The information is based on laboratory work with small-scale equipment and does not
necessarily indicate end product performance. Because of the variations in methods, conditions and equipment used commercial ly in processing these
materials, no warranties or guarantees are made as to the suitability of the products for the application disclosed. Full-scale testing and end product
performance are the responsibility of the user. Mexichem Specialty Resins, Inc. shall not be liable for and the customer assumes all risk and liability of any use
or handling of any material beyond Mexichem Specialty Resins, Inc.’s direct control. The SELLER MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Nothing contained herein is to be
considered as permission, recommendation, nor as an inducement to practice any patented invention without permission of the patent owner.
TAB-023
Mexichem Specialty Resins, Inc. / 33653 Walker Road, Avon Lake, Ohio 44012
JUL 2013