FDA Medical Grade Soft RTV2 Moldmaking Platinum Cured Liquid Silicone Rubber LSR Raw Materials Compo

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Packaging and Delivery

Product Description

Specification
Addition Cured Silicone Rubber for Mold Making, which is also named addition cure silicone rubber and platinum cure silicone rubber, is generally a two-component liquid silicone rubber vulcanized under room temperatureRTV-2.

Applications
Addition Cured Silicone Rubber has extensive use,such as mold making of foods candy,cake, cookie,chocolate, ice cube, fondant etc, jewelries, tires, rapid prototyping,life casting,realistic mask,epoxy resin products,candle,vacuum foaming,making of prosthetic breast,artificial skin,human body,adult toys,baby feeding nipples,phone case and so on.

Techinical Parameters
Model Code GTSIL-P10 GTSIL-P15 GTSIL-P20 GTSIL-P25 GTSIL-P30 GTSIL-P35 GTSIL-P40
Hardness - Shore A 8-10 14-16 19-21 24-26 28-30 34-36 38-42
Viscosity - Cps 3000-5000 4000-6000 4000-7000 5000-8000 6000-9000 6000-10000 4000-6000
Mixing Ratio - % 1:1 1:1 1:1 1:1 1:1 1:1 1:1
Tear Strength - KN/m2 14-17 16-18 18-22 22-26 20-23 16-19 12-16
Tensile Strength - Mpa 3.5-5.5 4-6 4-6 4-6 4-6 4-6 3.5-5.5
Shrinkage - % 0.10% 0.10% 0.10% 0.10% 0.10% 0.10% 0.10%
Elongation - % 500-600% 500-600% 500-600% 400-500% 400-500% 350-500% 300-450%

How to use

1.Substrate Preparation
The surface of the original should be clean and free of loose material. If necessary, and in particular with porous substrates, use a suitable release agent such as petroleum jelly or soap solution.


2. Mixing
Thoroughly stir Part A silicone base before use as filler separation may occur upon prolonged storage.
Weigh 100 grams Part A silicone base and 3 grams Part B curing agent in a clean container. Mix together until the curing agent is completely dispersed in the base. Hand or mechanical mixing can be used, but do not mix for an extended period of time or allow the temperature to exceed 35°C 95°F. Mix suitably small quantities to ensure thorough mixing of the par A silicone base and part B curing agent.

It is strongly recommended that entrapped air be removed in a vacuum chamber, allowing the mix to completely expand and then collapse. After a further 1-2 minutes under vacuum, the mix should be inspected and can be used if free of air bubbles. A volume increase of 3-5 times will occur on vacuum de-airing the mixture, so a suitably large container should be chosen.

Caution: prolonged vacuum will remove volatile components from the mix and may result in poor thick section cure and non-typical properties.

Note: If no vacuum de-airing equipment is available, air entrapment can be minimized by mixing a small quantity of par A silicone base and part B curing agent, then using a brush, painting the original with a 1-2mm layer. Leave at room temperature until the surface is bubble free and the layer has begun to cure. Mix a further quantity of base and curing agent and proceed as follows to produce a final mold.


3. Pouring the Mixture and Curing
Pour the mixed Par A silicone base and Part B curing agent as soon as possible onto the original, avoiding air entrapment. The catalyzed material will cure to a flexible rubber within 24 hours at room temperature 22°C-24°C/ 71.6°F - 75.2°F and the mold can then be separated from the original. If the working temperature is significantly lower, the cure time will be longer. If the room temperature or humidity is very high, the working time of the catalyzed mixture will be reduced. The final mechanical properties of the mold will be reached within 7 days.

Basic Information

About Us

Dongguan Gangtian Polymer Materials Co.,Ltd, located in Dongguan City, Guangdong Province, China, is a professional leading manufacturer of RTV 2 Liquid Silicone Rubbers.
Focusing our Research and Development on innovation, we have been providing performance enhancing solutions to serve the diverse needs of thousands of customers worldwide since the year of 2003.
Our main products include RTV 2 mold making series, tinsil and platsil, RTV 2 platsil for products, injection LSR, silicone potting compound, silicone oil, silicone ink, etc.
With penetrating Professionalism in technology solutions and Honesty in after service, we GT Polymer Materials Co., Ltd are not only a trustworthy partner but also a good friend to the customers worldwide. Brand Story - Gangtian, founded in 2003 in Dongguan, by Yuanfu Deng, a Chinese chemist and engineer in the field of polymer materials, is a silicone factory brand. Gang, or port, is a new place near sea for him to cultivate. Tian, or field, stands for his hometown, a very small village in Hengyang, Hunan Province. Influenced by his parents who were both farmers, he creatively combines the company culture with Eastern wisdom, to work on the vision of Making a better life with magic silicone rubber. With his efforts and achievements in R D of silicone rubbers, we have been serving hundreds of domestic and overseas customers with quality materials for more than 15yrs. And now our production capacity reaches to more than 500tons per month.
We uphold the core values of create value for partners and create value for e-commerce and information service industry through independent innovation and sincere co-op with honesty, tolerance, innovation and service as the spirit of enterprise. We always warmly welcome you to join us. Let's go and explore this magic world of silicones!

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