WACKER Presents New Silicone Grades for Electronic and Medical-Technology Applications


Munich – PLASTIC Japan will see WACKER, a Munich-based chemical company, and Japanese silicone manufacturer Wacker Asahikasei Silicone unveiling innovative silicone products for the electronics, optoelectronics and medical-technology sectors. Among the products celebrating their premieres will be SEMICOSIL® 915 HT, a heat-resistant gel for encapsulating power electronic modules; LUMISIL® 868 S, an encapsulant for LED chips that prevents sedimentation of luminescent dyes; and LUMISIL® 885, a silicone rubber for producing optical lenses. Further product highlights will be SILPURAN® 2410 silicone rubber for orthopedic applications, and SILPURAN® 6610/40 liquid silicone rubber for radiation sterilizable valves used in medical technology. PLASTIC Japan will be held in Tokyo from April 10 to 12.



Products to be presented by WACKER at PLASTIC Japan include a further development of its successful SEMICOSIL® silicones, which have served as electronics encapsulants for many years.



SEMICOSIL® 915 HT, which is premiering in Tokyo, is a silicone gel that is characterized by extreme heat resistance after curing. This is evidenced by the fact that the mechanical properties of the cured rubber remains stable even after 2,000 hours' exposure to 210 April 10, degrees Celsius. The gel is therefore ideal for encapsulating power electronic modules. When regulating high electrical power, these modules can become so hot that conventional silicone gels fail. The new gel is a two-component, addition-curing product. It is typically used to encapsulate power electronic modules employed in energy technology, high-speed trains and industrial plant.



SEMICOSIL® 915 HT acts as a safeguard for manufacturers of power electronic modules against more exacting demands that will arise in the future, because the extremely heat-resistant encapsulant has the capacity to cope with much higher power densities than before.



LUMISIL® 868 S: a Specialty Silicone for Encapsulating LEDs WACKER will also be demonstrating LUMISIL® 868 S, a transparent specialty silicone for encapsulating light emitting diodes (LED). This two-component, addition-curing product, which has a pot-life of 24 hours after the components have been mixed, prevents luminescent dyes from settling in the liquid encapsulant. The material adheres to conventional reflector substrates, without their having to be pretreated. The encapsulant can be applied by either dispensing or jet methods.



LUMISIL® 868 S is designed for mass production of LEDs in which the purpose of the encapsulant is not only to protect the sensitive chip, but also to selectively influence the color of the emitted light. The LED maker simply mixes the luminescent dyes into the liquid silicone to produce emitted light with the desired spectral distribution – this is the process used to make LEDs that generate white light. With LUMISIL® 868 S, manufacturers can be assured that the quality of the LED light remains constant.



LUMISIL® 885: Lens Material for High Luminous Efficacy

A further product highlight is LUMISIL® 885. This is a new, addition curing silicone rubber of medium viscosity that cures to yield a very transparent, high-Shore elastomer that confers high luminous efficacy in optical applications. The two-component product is ideal for transfer molding, but can also be compression molded. This versatility makes production of LED lenses and other optical components more cost effective.



SILPURAN® 2410: a Variable-Hardness Silicone for Orthopedics WACKER will also be presenting new silicones for medical technology applications at PLASTIC Japan. SILPURAN® 2410, for example, is an addition-curing silicone rubber that specifically addresses the needs of the orthopedics industry. The hardness of the cured rubber is determined by the ratio in which the two components are mixed. Consequently, it can be varied from application to application. This means that silicone processors can meet different product specifications with just a single silicone rubber compound.



SILPURAN® 2410 is pourable and thus ideal for manual and semiautomated processes. This silicone cures rapidly at elevated temperatures to yield a highly flexible, translucent elastomer. This is breathable, compatible with the skin and has a low order of toxicity. It possesses good damping properties and exerts a soft and gentle compressive effect. Candidate applications range from shoe insoles April 10, 2013 and heel cushions to truss pads, orthotic devices and liners for prostheses.



SILPURAN® 6610/40: a Silicone for Radiation-Sterilizable Valves The spotlight will also be on SILPURAN® 6610/40, a liquid silicone rubber. This silicone can be used to injection mold biocompatible slit valves whose openings will not close over during radiation sterilization. In contrast to conventional silicone rubber compounds, valve production with SILPURAN® 6610/40 does not require additional auxiliaries for preventing the slits from closing over. As a result, there is less risk of contamination and valve production is simplified. SILPURAN® 6610/40 facilitates rapid, clean and costeffective mass production. Visit WACKER at the 2nd PLASTIC Japan, Booth 49 – 39.



New SEMICOSIL® 915 HT is one of the products to be exhibited by WACKER at PLASTIC Japan. This silicone gel is heat-resistant up to 210 degrees Celsius and is ideal for encapsulating power electronic modules.



The ratio in which the components are mixed determines the Shore hardness of SILPURAN® 2410 A/B. Increasing the proportion of the A component yields a softer vulcanizate (specimen on the left) whereas a higher proportion of the B component creates a harder elastomer that offers significantly greater resistance to the weight of the steel ball. A 1:1 mixture produces a medium Shore hardness.



For further information, please contact:

Wacker Chemie AG

Media Relations Information

Florian Degenhart

Tel. +49 89 6279-1601

Fax +49 89 6279-2877

florian.degenhart@wacker.com



The company in brief:

WACKER is a globally-active chemical company with some 16,300 employees and annual sales of around Euros4.63 billion (2012). WACKER has a global network of 24 production sites, 22 technical competence centers and 53 sales offices.



WACKER SILICONES

Silicone fluids, emulsions, rubber and resins; silanes; pyrogenic silicas; thermoplastic silicone elastomers



WACKER POLYMERS

Polyvinyl acetate and vinyl acetate copolymers in the form of dispersible polymer powders, dispersions, solid resins and solutions used as binders for construction chemicals, paints and coatings, adhesives, plasters, textiles and nonwovens, as well as for polymeric materials based on renewable resources



WACKER BIOSOLUTIONS

Biotech products such as cyclodextrins, cysteine and biologics, as well as fine chemicals and PVAc solid resins



WACKER POLYSILICON

Polysilicon for the semiconductor and photovoltaic industries Siltronic Hyperpure silicon wafers and monocrystals for semiconductor components



Wacker Chemie AG

Hanns-Seidel-Platz 4

81737 München, Germany

www.wacker.com

Number 19

PLASTIC Japan


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