Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Plastics & Elastomers Functions
- Technologies
Features & Benefits
- Materials Features
Applications & Uses
- Applications
- Application Details
PROCESSING
Ethacure 300 is a low viscosity liquid that is ready for immediate use. Loading can be accomplished with simple hand pumps or gravity feed. Dry nitrogen should be used to blanket
curative tanks.THEORY
Selection of 95% theory is generally recommended. Lowering it to 85% theory will improve compression set and raise 300% modulus (tensile). Increasing to 105% theory will enhance tear strength and elongation.
MOLD TEMPERATURE AND POST CURE
Mold temperature is generally higher than mix temperature. Molds should be preheated between 80 - 100°C and maintained at that temperature during cure. Demold time will vary with prepolymer and part size. Small parts (2 kg) can usually be demolded after 20 minutes, while larger parts will require more time. The recommended post cure conditions for TDI polyether and polyester prepolymers are 16 hours at 100°C. Prepolymers based on TDI/PTMEG (high performance ERAPOLS) may require shorter post cure periods.
Properties
- Physical Form
Storage & Handling
- STORAGE, HANDLING AND SAFETY
Ethacure 300 is stored in sealed containers and protected from moisture and oxidation by dry nitrogen. Although the product is not particularly hygroscopic, containers should not be left open to the atmosphere. Chemical stability is excellent under normal conditions, but storage in areas of excess heat and/or high humidity should be avoided. Flush an opened container with dry nitrogen before resealing.
In the event of a spill, contain with dykes or absorbents to prevent entry into sewers or streams. Small spills can be taken up with dry chemical absorbent. Refer to MSD'S for further information. Personnel handling this product should use safety goggles when there is a possibility of eye contact. In case of eye contact, immediately flush with water for 15 minutes and get medical attention. In case of skin contact, wash the exposed area with soap and water. If ingested, give two glasses of water.
Ethacure 300 is expected not to exhibit a mutagenic or carcinogenic risk. Toxicological testing demonstrated that Ethacure 300 is only slightly toxic orally to rats (LD50 = 1515 mg/kg) and practically non-toxic dermally to rabbits (LD50 > 2000 mg/kg). Eye irritation, but not skin irritation has been observed with rabbits.