Enhanced TDS
Identification & Functionality
- Chemical Family
- Chemical Name
- Base Chemicals Functions
- CAS No.
- 1746-23-2
- Technologies
- Product Families
- Chemical Structure
Typical Isomer Distribution:
95% Para
5% Meta
Features & Benefits
- Base Chemicals Features
Applications & Uses
- Markets
- Applications
- Base Chemicals End Uses
- Applications
- In unsaturated polyester resin (UPR) applications such as SMC, BMC, lay-up, spray-up, casting and injection molding, TBS is an excellent diluent because of its low vapor pressure, high flash point, low shrinkage on polymerization and reduced exotherm. Higher operating temperatures are possible resulting in formulations with reduced viscosity, faster polymerization and cycle times, and the elimination of mold scum. TBS/UPR resins result in products with improved heat distortion and improved corrosion resistance.
- TBS monomer can be polymerized by any of the conventional ways of initiation and in the presence of inert materials such as fillers, dyes, solvents, resins, rubbers and plasticizers. Unlike polystyrene, the homopolymer of TBS is soluble in hydrocarbons due to its aliphatic nature. TBS can be copolymerized with other monomers while requiring minor recipe adjustments when replacing styrene monomer on a mole-for-mole substitution.
- TBS is the ideal monomer for use with alkyd and drying oil resins when greater aliphatic compatibility is desired. Also, the higher flash point of TBS permits higher operating temperatures resulting in shorter reaction times. In addition to improved aliphatic compatibility, TBS provides higher molar volume and improved thermal stability when used in manufacturing hydrocarbon resins.
Properties
- Physical Form
- Physical Properties
Value Units Test Method / Conditions Density (at 25°C) 0.884 g.cm³ - Surface Tension (at 25°C) 29.0 dynes-cm-¹ - Volume Concentration on Polymerization (at 25°C) 7.0 % - Polymer Negative - ASTM D-2121-84 Vapor Pressure (at 40°C) 1.0 mm.Hg - Vapor Pressure (at 80°C) 6.0 mm.Hg - Vapor Pressure (at 120°C) 37.0 mm.Hg - Vapor Pressure (at 160°C) 77.0 mm.Hg - - Typical Properties
Value Units Test Method / Conditions Molecular Weight 160.26 g/mol - Refractive Index (n25D) 1.52 - - Minimum Assay 99.2 - 99.5 % Boiling Point at 760 mmHg 219 ° C - Freezing Point -38 ° C - Heat of Polymerization 16-18 Kcal mole-1 - Copolymerization Q value 1.39 - - Copolymerization e value -0.9 - - Inhibitor (p-tert butyl catechol) 50 ppm ASTM D-4590 Vapor Pressure (at 40°C) 1 mmHg Surface Tension (at 25°C) 29 dynes.cm-1 - Chemical Analysis
Value Units Test Method / Conditions Isomer Distribution (Para) 95.0 % GC Isomer Distribution (Meta) 5.0 % GC Inhibitor TBC 40 - 50 ppm ASTM D-2120-82
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
- Other
Nothing contained herein is to be construed as a recommendation to use any product in conflict with any patent. Deltech LLC makes no warranties as to the fitness of merchantability of any product referred to, no guarantee of satisfactory results from reliance upon contained information or recommendation, and disclaims all liability for any resulting loss or damage.
Storage & Handling
- Storage & Handling
Typical precautions in handling TBS monomer include wearing protective clothing, the use of impermeable gloves and use in a well ventilated area. Do not store in direct sunlight. Maintain storage temperature below 75oF if extended storage is required. TBS monomer contains the polymerization inhibitor tertiary butylcatechol (TBC) to reduce polymer formation during storage. For other product safety and toxicological information, please consult the Material Safety Data Sheets for TBS monomer.