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L-5340 was developed to fill the rigid foam
industry's need for a very efficient, |
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isocyanate-compatible, liquid surfactant. In very
critical laboratory tests, L-5340 proves to be highly
efficient in many types of formulations. |
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L-5340 can be used in formulations containing
crude TDI or polymeric MDI and provide |
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table isocyanate blends. It can be used to stabilize
standard formulations where an isocyanate-compatible
product is desired, and should be evaluated in those
formulations where the standard surfactants are
inadequate to provide the desired performance properties.
The ability of L-5340 to stabilize formulations
with high hydroxyl polyols and water is an example
of its unique performance. |
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With the recent trend toward higher isocyanate
indices common in isocyanate foam |
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formulations have come new requirements for the
silicone surfactant. This relatively new technology
has increased the ratio of isocyanate to polyol,
thus placing increased importance on the ability
of polyol and isocyanate to emulsify efficinetly. |
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L-5340 has been demonstrated as an excellent
product in these types of applications |
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because of its ability to improve this mixing.
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¢ºPerformance Data |
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The Optimum concentration of L-5340
depends on many variables, such as formulation
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ingredients, type of application, or mold
complexity. A starting concentration of 1.0~1.5
parts by weight per 100 parts of polyol is
recommended. This generally corresponds to
0.5~0.6 weight percent based on the total
formulation. In isocyanate foam, this recommended
use level may need to be increased. The best
loading should be determined using each specific
formulation and type of equipment. |
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