Sell application of condensation cure rtv-2 moldmaking silicone @China (Mainland)

Application of Condensation cure RTV-2 moldmaking silicone :

including making molds for reproducing prototypes, furniture, sculpture and architectural elements with a variety of materials including wax, gypsum, low melt alloys/metals and urethane, epoxy or polyester resins

 

Preparing the Model for Condensation cure RTV-2 moldmaking silicone:

 Porous surfaces, such as wood, should be dried and sealed. Also applying a release agent, such as petroleum jelly will aid in easy release of a silicone mold. Because silicone can sometimes bond to surfaces which contain silica, such as glass, cements and natural stone; it is recommended to do a spot test for possible adhesion.

 

Mixing and Curing of Condensation cure RTV-2 moldmaking silicone:

 This material can readily accept pigments.Stirring individual components before use is recommended. Make sure to weigh and measure accurately. Close containers tightly after use. Products should be stored in their original, sealed containers in an environment that does not exceed 90F. Under these conditions, the product will achieve the expected shelf life. Please refer to the individual products technical sheet to determine the products expected shelf life.

The following procedure is an example of a 100:2 mix ratio addition cure product. Please refer to the product’s technical sheet for mix ratio information:

Mixing of Condensation cure RTV-2 moldmaking silicone:

 Charge 100 parts by weight of “Part A” and 2 parts by weight of “Part B” into a clean, compatible metal or plastic container. The volume of the container should be 3-4 times the volume of the material to be mixed. This allows for expansion of the siloxane material as it de-gasses.

Mix thoroughly by hand or with mixing equipment while minimizing air entrapment until a homogeneous mixture is obtained. This will occur when the material takes on a uniform color with no visible striations. Scrape the sides and bottom of the container thoroughly several times while mixing. Once mixing is complete it is recommended that the material be de-aired 2-3 times by intermittent evacuation for a few minutes to minimize any imperfections due to bubbles in the cured material. Typically after releasing the vacuum 2-3 times the mass will collapse on itself at which time the vacuum should be left on only 2-4 minutes longer.  

 

Pouring the Mold Condensation cure RTV-2 moldmaking silicone:

 To pour the mold, begin by pouring a stream of silicone into one corner of the mold box. Allow the liquid to push the air out ahead of it to avoid inducing air into the mold. If you have a highly detailed mold, some moldmakers recommend applying mixed silicones directly onto the detailed area and applying low pressure air before pouring the remainder of the mold.

 

Demolding of Condensation cure RTV-2 moldmaking silicone:

Please refer to the recommend time to demold on the technical sheet for the individual products. Remember to carefully demold at this point, since the mold has not yet achieved a full cure.

Storing the Mold: It is best for the mold if it can be stored in the original mold box or on a surface that will stress them the least. If left in a distorted shape for extended periods of time, the mold may not be able to return to the original state. Keep of out sunlight and in a cool, dry area if possible.

The information just for reference, if there is difference between products and above, however just reference products

Any questions of silicone rubber for mold making, please feel free to contact miss angel:

TEL: 086-755-85224692

FAX: 086-755-89948030

MOBILE:086-13510596685

Website:  www(dot)szrl(dot)net

E-MAIL: hyjd(at)szrl(dot)net

 

Post by angel zhou    Chemicals    @2012-02-17 18:03:33