LIGHT WELD197-M SERIES

FLEXIBLE WATER-RESISTANT ADHESIVES

DESCRIPTION

Light Weld 197-M Series are flexible UV curing medical device adhesives that form durable bonds between polycarbonate and variety of plastics. These NVP-free adhesives are USP Class VI certified and their flexibility provide shock absorbing characteristics in the bond area. For a complete list of applications and substrates, please see the Dymax MD® products selector guide or call the Dymax Technical Center.

UNCURED PROPERTIES

Solvent ContentsNone - 100% Solids

CompositionUrethane Oligomer/(Meth)Acrylate Monomer Blends

AppearanceClear/Light Amber Liquid

Flash Point>93C

SolubilityAlcohol/Chlorinated Solvents

ToxicityLow

Refractive Index 1.489 (20°C)

Density1.10 g/mL

Viscosity 197-M 1,200 mPasASTM D-1084

197-M-T 7,000 mPasASTM D-2556

197-M-GEL25,000 mPasASTM D-2556

CURED PROPERTIES

PHYSICAL

Durometer HardnessD60ASTM D-2240

Tensile at Break13,8 N/mm2ASTM D-638

Elongation at Break160%ASTM D-638

Tensile at Yield9,32 N/mm2ASTM D-638

Elongation at Yield10%ASTM D-638

Thermal Limit (brittle/degrades)-54 to 177C

Water Absorption (24 h)1.0%ASTM D-570

Boiling Water Absorption (2 h)2.6%ASTM D-570

Refractive Index 1.506 (20°C)

UV LIGHT CURE DATA - Using 365 nanometer UV light [1]:

Cure TimeIntensity [2]Dymax Light-

(seconds)mW/cm2Welder Lamps

Fixture between glass slides 5 202000-EC

Nominal Cure Depth (12,7 mm)60 202000-EC

Tack-Free Surface Care (3,2 mm bead)452005000-EC

BIOCOMPATIBILITY AND STERILIZATION

SME Technical Paper #AS91-397, 1991 advises that "All adhesives are toxic in their raw or uncured state. Complete cure is required to retain Class VI certification status." It is recommended that biocompatibility testing of the completed device be done following sterilization to eliminate the effects of minor process variations and contamination during assembly. The sterilization methods of choice are gamma irradiation, ethylene oxide and electron beam sterilization. Sterilization by autoclaving may be limited by certain applications. Laboratory data indicates that gamma irradiation cures Dymax adhesives.

STORAGE AND SHELF LIFE

Do not expose to UV light source or sunlight. Light Weld 197-M series should be stored in a warm area 24C in the dark when not in use. Should product cool below 18C, it may begin to crystallize and thicken. If this should occur, nominal viscosity can be restored by gentle warming at 38 to 49C with occasional stirring. This "freeze"/melt process has no effect on the product's properties. Light Weld 197-M series has a one year minimum shelf life when stored as above stated.

CAUTION

For industrial use only. Avoid breathing vapors. Avoid contact with eyes and clothing. In case of contact, immediately flush with water for at least 15 minutes; for eyes, get medical attention. Wash clothing before reuse. Keep out of reach of children. Do not take internally. If swallowed, vomiting should be induced at once and a physician called. For specific information, refer to the product Material Safety Data Sheet before use.

NOTES

[1]Do not recommend lamps that emit high levels of shortwave light (for example, more than 15% 200-300 nanometer UV light).

[2]Nominal intensity taken at a pre-determined distance. This reading does not reflect the maximum intensity capabilities emitted from each unit.

Distributed by: DYMAX Europe GmbH

Trakehner Str. 3

60487 Frankfurt a. Main

Phone: +49-(0)69-7165-3568

Fax: +49-(0)69-7165-3830

e-mail:

Internet:

The data contained in this bulletin represents typical results, is furnished for information only and is believed reliable. We cannot assume responsibility for results obtained by others over whose methods we have no control. It is the user's responsibility to determine suitability for the user's purpose of any product or method mentioned herein and to adopt such precautions as may be advisable for the protection of property and persons against any hazards that may be involved in the handling and use thereof. Nothing in this bulletin is to be interpreted as a representation of freedom from domination of patents owned by others or a license under a Dymax Corporation patent. We recommend that each prospective user test the proposed application before repetitive use, using the data as a guide. 197-M/12/98