Sauereisen - Model No. 30 - Plastic Porcelain Material
From Ceramic Assembly
Sauereisen Plastic Porcelain No. 30 is an inorganic, chemically-setting, magnesium oxide base material which expands slightly while hardening to a porcelain-like body. No. 30 is used for assembling silverware and cutlery, insulating lead wires on electrical fixtures and sealing conduits to prevent the spread of explosive gas.
A thermally conductive and electrically insulating cement, it resembles a durable ceramic upon curing and will resist high temperatures. The expanding curing property makes No. 30 a good candidate for potting applications and for filling other hollow cavities.
Cement No. 30 is supplied in a powder form and is mixed with water to apply. Due to its inorganic composition. Plastic Porcelain Cement is very stable and will neither outgas, nor cause skin irritations like many other adhesives.
- Heat conductive and thermal shock resistant.
- Safely insulates electricity.
- Stable within temperature range of -100°F (-73oQ to 900°F (482oQ.
- Resists water, oil, acids & solvents.
- Non-toxic and odorless.
- Hardens like porcelain.
- Compatible with the finest metals.
Sauereisen No. 30 Powder should be thoroughly remixed prior to use. The mix ratio of No. 30 should include 5 parts Powder to one part potable water, by weight. Place warm water into a clean mixing container and gradually add Powder while mixing. Continue mixing until a uniform, flowable consistency is obtained. Mixing may be done with a slow-speed mixer or by hand with a spatula. Minimal amounts of extra water should be used as excess water will reduce mechanical strength, increase shrinkage and delay set time.
Potting Assembly - Surfaces to receive the cement should be clean and free of grease and dirt. Porous substrates should be dampened slightly with Sauereisen Thinning Liquid No. 14 prior to application.
Plastic Porcelain No. 30 is chemically-setting and does not require exposure to air to cure. Placement of the cement is most commonly done with the use of hand held dispensing units or a squeeze bottle. Cement No. 30 can also be poured.
Failure of the cement to adhere indicates that setting has begun. At this point, a new batch of cement should be mixed.
Do not attempt to retemper by adding more water.
Flatware Assembly - A convenient batch size includes a mixture of 62 ounces of No. 30 Powder and 12 fluid ounces of warm (approximately 100oF) water. Blend in a slow speed portable mixer for 5 to 10 minutes.
The mixed cement is then placed into a filling machine which utilizes a power driven screw to force the cement through a small diameter tube and into the metal handle. When the handle is completely filled, the dispenser is removed and the blade and handle are held in alignment by a special clamping device. The assembly is then passed through a water spray to remove the excess cement.
- Coefficient of thermal expansion (ASTM C372): 5.0 x 10-6/Fo (9.0 x 10-6/Co)
- Color: Tan
- Compressive strength (ASTM C579) @ 7 days: 3,500 psi (246 kg/cm2)
- Density (ASTM C20): 125 pcf (2 gm/cm3)
- Expansion: 0.2%
- Maximum service temperature: 900oF (482oC)
- Mix ratio (powder to water, by weight): 5:1
- Modulus of elasticity (ASTM C580): 1.44 x 106 psi (1.01 x 105 kg/cm2)
- Tensile strength (ASTM C307): 200 psi (14 kg/cm2)
- Thermal conductivity: 5-6 BTU . in/ft2 . hr . oF
No. 30 hardens with an internal chemicalsetting action in 18-24 hours at ambient temperature. Working time of of No. 30 when Powder is mixed with water is approximately 30 minutes at 70oF.
If it is desired to accelerate the cure, low temperature oven drying at 180oF can be used. Avoid steaming while drying. If the cement will be exposed to elevated temperatures that may approach or briefly exceed the recommended service limits, contact Sauereisen for appropriate drying schedule recommendations.
A heat cure is also suggested where humidity resistance is required. In addition, a moisture-resistant lacquer or silicone coating may be applied to the exposed surfaces.
- 1-quart and 1-gallon cans;
- 50-lb. bags on stretchwrapped pallets.
All equipment should be cleaned with soap and water before No. 30 cures. If removal is required after cure, consult Sauereisen for recommendations.
Sauereisen No. 30 has a shelf life of one year when stored in unopened, tightly sealed containers in a dry location at 70oF. If there is doubt as to the quality of the material, consult Sauereisen.
Consult Material Safety Data Sheets and container label Caution Statements for any hazards in handling this material.