Silicone Inc. P-565 Platinum Clear Silicone

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P-565 Silicone Rubber Clear Silicone

Description

P-565 is a transparent, two-component, addition reaction, platinum catalyzed silicone rubber. It is designed to remain water-clear even after extended exposure to the sun. Although P-565 has very good physical properties for an unfilled system, it is not designed as a mold-making rubber; rather, it is used as the article.

Applications

P-565 was developed to make sculptured articles and for special effects applications that demand clarity.

Mixing Instructions

Mix 100 parts by weight of P-565 Base with 10 parts by weight of P-565 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-565 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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