Storage stability test

This test method measures the storage stability of the modified bitumen at high temperatures. The polymer-modified bitumens in particular are known to display phase separation under certain conditions, mainly storage. 

According to CEN EN 13399 (2010), a homogeneous specimen of modified bitumen is placed in a special thin unvarnished aluminium tube and positioned vertically in an oven of 180°C 5°C for 3 days. The specimen is then allowed to cool and is cut into three equal parts. The material contained in the two tube ends (top and bottom) is further analysed for potential changes of its characteristic properties. 

Usually, after the 3-day storage, the penetration and softening point are determined and the values obtained are compared to those before storage. The differences in values expressed as percentages or units must comply with limiting values required. 

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Development and testing of these specialized sorbents is usually a lengthy process. The reaction must first be shown to proceed on the sorbent, in addition to recovery, capacity, and storage stability tests. The procedure for preparation of the sorbent must be shown to be consistent with several batches of prepared sorbent. 

For storage stability tests, a sufficient number of badges were exposed to an exposure dose level of approximately one-half the charcoal capacity at 80 percent relative humidity. Half the samples were refrigerated (40-45°F) and half were left at ambient temperatures (75-80°F). Badges were then analyzed at intervals ranging from one day to three weeks. 

TABLE 1. Storage Stability Testing Results Indicating Acceptable Storage Stability is Obtainable if Initiator/Monomer Ratio Is Less Than 0.07 ... 

TABLE 1. Image Quality Testing Results of Negative Working Photosensitive Compositions after Storage Stability Testing"... 

Long term storage stability tests of flavor beta-cyclodextrin complexes under "non-stress" conditions at room temperature showed that molecular encapsulation in most cases provided an almost perfect preservation of flavors upon ten years storage. The degree of preserving power of cyclodextrin complexation is expressed using a comparison of total flavor content of complexed flavor samples deteimined in 1977 and 1987,respectively./Table IV./... 

Devel Section Rept No 8 (1957) (Storage stability tests of colloidal LA for use in low energy electric detonators) 19)Purchase Description X-PA-PD-1217(1957) (Tentative spec for Type I and Type II LA s used in the US for military purposes) 20)K.J.Holloway, G.W.C. Taylor A.T. Thomas, ERDE Rept No 7/R/58(l958) (Prepn and props of RD-1343 lead azide) 21)R.L.Wagner, PicArsn... 

Emulsion stability using a storage stability test Measure droplet size distribution and concentration at the top and bottom of a hermetically sealed container during storage Results usually expressed as plots of mean droplet size and concentration (volume fraction) as a function or storage time... 

The so-called storage stability test is a standard test that is used across many different fields—e.g., the pharmaceutical, cosmetic, and food industries. The test is popular because it yields precise information about the long-term shelf life of emulsions. In this test, emulsions are stored under conditions that are applicable to those encountered in the actual production/consumption situation. It should be noted that the presented test protocol is time consuming and requires sampling over an extended period of time. In the... 

Table D3.4.1 Typical Example of a Sampling Schedule and Reporting Form for Storage Stability Tests...

Figure D3.4.7 showstypical results obtained from a storage stability test (see Basic Protocol 1) of an oil-in-water emulsion that consists of a 20% (v/v) hexadecane-in-water emulsion stabilized by 2% (w/v) polyoxyethylene-20-sor-...

This example demonstrates that storage stability tests are extremely useful as they allow emulsion manufacturers to accurately follow even small changes in emulsion properties. Plots of droplet size distribution and concentration as a function of time can be used to determine the kinetics of the instability process and to determine the shelf life of the product by setting upper and lower limits for both mean droplet size and concentration at each port. 

While the actual preparation time of samples is short and involves only several hours, the actual storage stability tests are lengthy and may be conducted over a period of more than a year. The total length of the experiment ulti-... 

As in the storage stability test (see Basic Protocol 1), the preparation time is short. Less than 30 min are required to set up the samples for storage. The actual storage stability for creaming profile determination is usually conducted over a periods of up to 4 weeks. Tests that are accelerated by centrifugation may require less than 8 hr of preparation and completion. 

Experiment 3. Long-term matrix storage stability. Test for the designated temperature, i.e., -20 °C or -70 °C to cover the time of sample analysis. 

TABLE 11. Cold Storage Stability Test of Vegetable Oils. ... 

Storage stability tests. Some lubricant combinations are formed by the association of products that are not fully miscible in oil. In this case, the final stability that represents changes during storage needs to be verified. 

Storage Stability Tests for Evaluating Antioxidants in Fats and Oils," Technical Data Bulletin ZG-194c, Eastman Chemical Products, Inc.,... 

Table IV. Results of Storage Stability Tests of Treated Shale-I JP-5...

ASTM F 1105-95. Standard test method for preparing aircraft cleaning compounds, hquid-type, temperature sensitive, or solvent-based, for storage stability testing. 

The compatibility of the system or the successful bitumen modification can also be ascertained with a simple laboratory test, known as storage stability test , originally suggested by Shell and standardised by GEN EN 13399 (2010). 

With the appearance of modified bitumen, there was a necessity to establish supplementary tests. Thus, cohesion tests, the elastic recovery test and storage stability tests have been added. 

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