Silicone Inc. P-15 Platinum Silicone 10 LB Kit P-15 Silicone Rubber Silicone
Description
P-10, P-15,and P-20 are semi-transparent, two-component, addition reaction, platinum catalyzed silicone rubber. General Information P-10, P-15 and P-20 RTV silicone rubbers are two-component, platinum-catalyzed systems that cure at room temperature. All of these materials have low viscosity, high elongation, high tear strength and low durometer. They are easy to mix and de-air, and will cure with virtually no shrinkage. The speed at which the rubber hardens can be dramatically accelerated with heat or with Pt Accelerator at room temperature. Addition-cure two-component silicone rubbers exhibit excellent chemical and heat resistance, but may show inhibition sensitivity. P-10, P-15 and P-20 offer excellent release properties and are extremely useful for casting complex shapes, animatronic skins, or any application where exceptional flexibility and tear resistance are required.
Applications
The P- series was developed to make sculptured articles and for special effects applications that demand clarity.
Mixing Instructions
Mix 100 parts by weight of P-10-20 Base with 10 parts by weight of P-10-20 Activator in a container that will hold approximately 4 to 5 times the volume being used. Mix thoroughly either by hand or by mechanical mixing. After mixing, place the material in a vacuum chamber capable of 28 to 29 inches of mercury vacuum. The material will expand to approximately quadruple its original volume and then collapse. Maintain the vacuum for an additional 2 to 3 minutes and then remove.
Cure Sensitivity P-565 may have its cure inhibited at the surface. Models that have come in contact with tin catalyzed rubbers (the GI- and XT- Series) may show cure inhibition at the face of the mold. This can usually be prevented by thoroughly cleaning the model with naphtha or methylene chloride, releasing and checking the area by brushing on a small amount of catalyzed P-10-20 rubber. If the contamination still exists, the model should be cleaned again and a thin film of acrylic or nitrocellulose lacquer or base coat should be applied. This will serve as a barrier coat. Other substrates such as clay containing sulfur or any other sulfur, amine, or tin contaminated materials will cause surface inhibition and in all cases a test should be run as outlined above to determine compatibility.
Typical Properties
Color of Base = Transparent
Color of Activator = Transparent
Viscosity, cps 12,000 + 2,000 Mixed Viscosity, cps 6,000 + 2,000
Work Time, hours = 1.5
Cure Time, hours = 16-18
Shore A Hardness, =- 16-18 hrs 10 + 2
Shore A Hardness, = 7 days 16 + 2
Shore A Hardness postcard @ 300oF/1 hour) 27
Specific Gravity = 1.02
Tear Strength, ppt = 40 + 10
Shrinkage, % Nil
Service Temperature (°F) -60 to 600
Shelf Life (months) 6
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