Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Materials Features
- Features and Benefits
Features
- High HDT
- High molecular weight
- High elongation
- Low exotherm
Benefits
- Excellent mechanical properties
- Excellent resistance to water ingress
- Excellent impact resistance
- Prevents distortion of heat sensitive plastic liner
Crystic D3846SA is also available as a high viscosity version, Crystic D3846SAHV.
- Chemical Resistance
Crystic D3846SA has equivalent chemical resistance to Crystic 272 or Crystic 491PA. These resins have been evaluated in contact with many commonly encountered chemical environments. Maximum safe exposure temperatures for these are given in Scott Bader’s “Safe Chemical Containment” brochure. Alternatively, contact our technical service department.
- Notes
*Curing schedule - 24hrs at 20ºC, 3hrs at 80ºC
†Curing schedule - 24hrs at 20ºC, 5hrs at 80ºC, 3hrs at 120ºC
Mechanical properties of impregnated felt, thickness 3 mm using Crystic D3846SA
Applications & Uses
- Markets
- Applications
Crystic D3846SA has been specially developed for the production of liners to be used in the pipe relining (CIPP or Cured-In-Place-Pipe) industry. Fully cured laminates offer high chemical resistance and mechanical properties, together with excellent long term property retention.
- Formulation Guidelines
The following formulation is recommended for hot curing (80 – 85°C):
- Crystic D3846SA : 100 parts
- Perkadox® 16 or equivalent (di-(4-tert-butylcyclohexyl)peroxydicarbonate) : 0.5 parts
- Trigonox® 42S or equivalent (tert-butylperoxyisononanoate) : 0.5 parts
The following formulation is recommended for cold curing (25°C) but can be used in conjunction with heat curing:
- Crystic D3846SA : 100 parts
- BP75W or equivalent (75% dibenzoyl peroxide powder, water damped) : 1-3 parts
- Crystic Accelerator D (10% dimethylaniline in styrene) : 1-3 parts
- Gel time
- The ambient temperature, the quantity and the type of catalyst will control the gel time of the resin. The geltime of Crystic D3846SA with the formulation described above at 82°C is 30 to 60 seconds.
- Geltimes ranging from 10 minutes to 3hrs can be obtained by adjusting the amounts and ratios of BP75W to Crystic Accelerator D. Users are advised to carry out their own trials before use.
Properties
- Color
- Mechanical Properties
- Typical Liquid Resin Properties
- Cured Properties
| Value | Units | Test Method / Conditions | |
| Flexural Modulus (Filled Resin 25% Martinal ON 310) | 3700 | MPa | — |
| Flexural Modulus (Unfilled Resin) | 2850 | MPa | — |
| Flexural Strength (Unfilled Resin) | 64 | MPa | — |
| Tensile Modulus (Filled Resin 25% Martinal ON 310) | 4700 | MPa | — |
| Tensile Modulus (Unfilled Resin) | 3750 | MPa | — |
| Tensile Strength (Filled Resin 25% Martinal ON 310) | 29 | MPa | — |
| Tensile Strength (Unfilled Resin) | 31 | MPa | — |
| Flexural Strength (Filled Resin 25% Martinal ON 310)** | 54 | MPa | — |
| Value | Units | Test Method / Conditions | |
| Viscosity (at 25°C, Brookfield RVT, 100 rpm) | 570 | Centipoise | — |
| Thixotropic Index | 2.8 | Ratio | — |
| Stability (at 20°C) | 6 | Months | — |
| Gel Time (at 25°C, using 1% BP75W and 2% Crystic Accelerator D) | 45 | Minutes | — |
| Value | Units | Test Method / Conditions | |
| Barcol Hardness (GYZJ 934-1)* | 45 | — | — |
| Deflection Temperature (under load 1.80 MPa) †* | 75 | ºC | — |
| Water Absorption (24h, at 23°C)* | 16 | mg | — |
| Volumetric Shrinkage* | 7.5 | % | — |
| Flexural Strength* | 86 | MPa | — |
| Flexural Modulus* | 3600 | MPa | — |
| Tensile Strength* | 75 | MPa | — |
| Tensile Modulus* | 3500 | MPa | — |
| Elongation (at break)* | 3.8 | % | — |
Technical Details & Test Data
- Additives
Since certain pigments, fillers or extra styrene may the affect properties of Crystic D3846SA their effect should be evaluated before addition to the formulation.
Packaging & Availability
- Packaging Type
- Packaging
Crystic D3846SA is supplied in 25kg kegs, 225kg drums, and 1125kg intermediate bulk containers. Bulk supplies can be delivered by road tanker
Storage & Handling
- Storage
Crystic D3846SA should be stored in the dark in suitable, closed containers. It is recommended that the storage temperature should be less than 20ºC where practical, but should not exceed 30ºC. Ideally, containers should be opened only immediately prior to use. Where they have to be stored outside, it is recommended that drums be kept in a horizontal position to avoid the possible ingress of water. Wherever possible, containers should be stored under cover. Crystic D3846SA should be continuously stirred to avoid sedimentation during the storage period.