Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Features and Benefits
- Wetting agents
- Rapid hardening
- Low exotherm pic
- High HDT
- Low Styrene Emission
- Fast and easy impregnation of the reinforcement
- Fast mold turn – round
- Production of thick laminates wet on wet
- Very good heat resistance
- Better comfort for the workers, lower smell for the neighborhood
Applications & Uses
- Markets
- Applications
- Composites Processing Methods
- Application Method
- Spray
- Recommended Applications
CRYSTIC 4252.4 TEPA V01 has been designed to provide rapid wet out, low exotherm temperature, fast hardening with adequate pot life for spray application and contact molding. CRYSTIC 4252.4 TEPA V01 fits particularly well when excellent mechanical performances are required, it can also be used for bonding on acrylic sheets for sanitary use.
- Formulation
The following cold curing formulation is recommended:
CRYSTIC 4252.4 TEPA V01 100 parts Catalyst M 1 to 3 parts
Properties
- Color
- Appearance
- Pink Thixo
- Typical Properties
- Cured Properties
- Characteristics
| Value | Units | Test Method / Conditions | |
| Gel time at 20°C with 100 parts of 4252.4 TEPA V01 2 parts Catalyst M | 23 – 25 | Minutes | - |
| Specific Gravity | 1.1 | — | — |
| Stability in dark at 20°C | 3.0 | Months | - |
| Viscosity at 25°C (Rheomat 37,35 sec-1) | 2.5 – 3.5 | Poise | - |
| Gel time (at 20°C with 100 parts of 4252.4 TEPA V01 2 parts Catalyst M) | 23 - 25 | Minutes | — |
| Volatile Content | 41 - 45 | % | — |
| Stability in dark (at 20°C) | 3 | Months | — |
| Viscosity (at 25°C Rheomat 37,35 sec-1) | 2.5 - 3.5 | Poise | — |
| Value | Units | Test Method / Conditions | |
| Barcol Hardness (Model GYZJ 934-1) | 40 | — | — |
| Water Absorption (24H at 23°C) | 15 | mg | — |
| Heat Deflection Temperature (1.80 MPa) | 80 | ºC | — |
| Specific Gravity | 1.2 | — | — |
| Tensile Strength | 52 | MPa | — |
| Volumic Shrinkage | 7 | % | — |
| Tensile Modulus | 4000 | MPa | — |
| Value | Units | Test Method / Conditions | |
| Acid Value | max. 20 | mg KOH/g | — |
Technical Details & Test Data
- Laminating Techniques
The low exotherm temperature build up of CRYSTIC 4252.4 TEPA V01 is designed to allow several layers of resin and reinforcement to be applied consecutively, giving a faster production rate and a shorter overall mold turn-round time. For application when only one a two layers of light weight (300 – 450 g/m2) reinforcement are applied in a working day and a comparatively low exotherm temperature is generated, the hardening rate will be adequate provided that the temperature is within the range 16 – 20°C.
- Gel Time
The ambient temperature, the amount and type of catalyst control gel time of resin formulations. This can be approximately determined from the following table, which shows the gel time of 100 parts in weight of CRYSTIC 4252.4 TEPA V01 containing 1 to 2 parts in weight of Catalyst M.
Parts of Cat. M for 100 parts of 4252.4 TEPA V01 1 2 Gel time at 20°C (min) 55 25 Gel time at 25°C (min) 35 15 Satisfactory laminate cannot be made from CRYSTIC 4252.4 TEPA V01 by curing at workshop temperature below 15°C. When longer gel time is required a low reactivity catalyst (Butanox LPT) should be used instead of Catalyst M.
- Additives
Since certain pigments, fillers or extra styrene may the affect properties of CRYSTIC 4252.4 TEPA V01 their effect should be evaluated before addition to the formulation.
- Post Curing
For most applications satisfactory result will be obtained by curing at room temperature (20°C). Some improvement in properties may be obtained by post-curing 16 hours at 40°C after release from the mold.
- Food Contact
The results of the global and specific migration tests being below the maximum value set by the European Regulation ( CEE n° 85/572, 90/128, 93/8) CRYSTIC 4252.4 TEPA V01 may be used in contact with foodstuff. Moldings which are to be used with foodstuffs should be cured with catalyst O or Butanox LA. After release from the mold, laminates should be allowed to mature for 24 hours at workshop temperature (20°C). They should then be post cured for a minimum of 3 hours at 85°C. The moldings must be thoroughly wet steam cleaned for at least one hour before being put into service. If wet steam cleaning is not practical, and if the molding is a vessel, it should be filled with hot water (60-80°C) containing a non perfumed detergent and left to stand for two hours. It should then be emptied thoroughly washed in several batches of clan hot water. These precautions are essential to avoid the tainting of foodstuffs.
Safety & Health
- Health and Safety Information
The most important protective measures to be taken with unsaturated resins and resin systems are:
- Correct storage
- Stock rotation
- Adequate workplace ventilation
- Local extraction where vapor
- Concentrations may build up or are high
- Use of fresh air masks in confined spaces or spray applications outside of spray booths
- Work place monitoring of vapor concentrations
- Good housekeeping
- Systematic work routines
- Competent personnel
- Supervision, training and instruction
- Fire precautions
- Correct disposals
- Points of Caution
Monomer and solvent vapor concentrations above certain levels can be hazardous to health and safety. The safety risks are associated essentially with the fire and possible explosions. The risks to health come mainly from the build up of vapors in the workplace in excess of certain limits and the limits applicable to the user’s country should be determined. The symptoms of the more common vapors are similar, i.e. dry irritating throat, coughing, drowsiness, headaches. Both liquids and vapors may cause skin irritation and dermatitis to susceptible personnel.
Packaging & Availability
- Packaging Type
- Packaging
- Crystic® 4252.4 TEPA V01 is supplied in 225 kg or 1000 kg containers. Bulk supplies can be delivered by road tanker.
- Variants
CRYSTIC 4252.4 TPA V01 is the non low styrene emission (L S E) version, it is available per minimum order of 3.5 tons.
Storage & Handling
- Shelf Life
- 3 Months
- Storage
- Crystic® 4252.4 TEPA V01 should be stored under cover in the dark in the container in which it is supplied. Storage temperature should not exceed 20°C