Silpak, Inc

Release Agents

E-35 and E-60

E‑35 and E-60 are a non-ionic, aqueous emulsion based silicone fluid, at a 35% -60% active-ingredient content. It is used primarily as a mold release agent in the metal working industry, as well as in the rubber and plastics industries.

In the industry of maintenance products, Emulsion E-35 and E-60 are used in the manufacture of polishes, tire rubber and vinyl treatment, and cleaners for synthetic leathers (PVC, PUR).

Features:

*Easily diluted, even in mineralized water, its stability will not be affected. May be diluted up to a concentration of one part emulsion to 200 parts water.

*Excellent stability in either concentrated or diluted form.

*Remarkable efficiency as a mold release agent due to its fine particles (0.5 micron) it leaves a thin uniform film, which inhibits any adherence after evaporation of water. Due to heat stability, does not carbonize at normal molding.temperatures. Molds are left clean and de-molded pieces are left unblemished with an extremely smooth finish.

*Excellent waterproofing ability.

PROCESSING GUIDELINES  (MOLD RELEASE AGENT)

A. Concentration

In order to determine the exact concentration for each individual case, it is recommended to begin with an emulsion consisting of one part of E‑35 to 35 parts water, or one part E-60 to 20 parts of water. This emulsion should be prepared by adding the water to E‑35 or E-60 and agitating.

If, at this concentration, the release is not satisfactory or if the surface of the molded piece is blemished, the concentration of E‑35 or E-60 should gradually be increased, agitating at each addition, until the desired performance is achieved.

If the concentration of E-35 or E-60 is not satisfactory, water may be added small increments (during agitation) in order to arrive at the minimum concentration necessary for effective mold release..

B. Application

Generally, application of the emulsion is done with a spray gun, regulated to leave a thin, homogeneous film of emulsion on the mold. This may also be done with a brush or pad, although could prove to be less economical.

A single application of emulsion usually allows several de-moldings. However, many users prefer to apply a more highly diluted emulsion and re-apply before each molding.

C. Preparation For Application

The application of emulsion must be made:

1) On molds that are completely degreased and clean: The presence of molded matter or alkaline solutions from scraping will inhibit the complete coverage of the emulsion on the molded surface, causing imperfections.

2) On heated molds, at least 110 to 120C, in order to assure instantaneous evaporation of water which must be accomplished before molding.

3) With diluted emulsions, the use of E‑35 or E-60 as is or insufficiently diluted may prevent the molded material from adhering to itself, and will not improve the release.

The information and data contained herein are based on information we believe reliable. Each user of the material should thoroughly test any application and independently conclude satisfactory performance before commercializing. Suggestions of uses should not be taken as inducements to infringe on any particular patent.