Knowde Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- Features and Benefits
- Urethane acrylate base
- Excellent retention of toughness
- Highly thixotropic
- Controlled cure and exotherm behavior
- Fast curing and setting
- Improved esthetics and better surface finish
- Excellent adhesion and high elongation at break
- Non sagging on vertical surfaces
- Excellent fatigue and impact resistance
- Reduced assembly time
Applications & Uses
- Applications
- Compatible Substrates & Surfaces
- Recommended Applications
- Crestomer 1151A is supplied pre-accelerated and ready to use in bulk application systems with standard benzoyl peroxide paste Perkadox BM50LS. Working time can be optimized through catalyst ratio variation to suit specific applications. To maximize properties it is recommended that Crestomer 1151A is applied via a bulk dispensing machine. Hand mixing and application is possible but there will be an associated reduction in performance.
- Crestomer 1151A is a versatile material as the recommended temperature range for application is between 5°C and 30°C/ 41°F - 86°F without loss of strength. Crestomer 1151A will remain free flowing even at low temperatures and so is suitable for use all year round. The use of additional pigments or fillers is not recommended as they can affect the performance of the adhesive.
- Crestomer 1151A has been shown to bond most materials commonly used in the GRP industry, however, the user must determine the suitability of a selected adhesive for a given substrate and application. Contact your local Scott Bader representative with any questions or assistance required with the selection of adhesives for your use. This product is intended for use by skilled individuals at their own risk. Recommendations contained herein are based on information we believe to be reliable. The properties and strength values obtained under controlled conditions at the Scott Bader laboratory.
Properties
- Appearance
- Mauve gel
- Mechanical Properties
- Typical Properties
- Application Properties
- Note
- Geltime measured with 100g mass of adhesive at 25°C/ 77°F. Using 2% BPO catalyst.
- Time taken at 23°C/ 73°F (ambient temperature) to achieve 1.4MPa strength in lap-shear tests according to BS ISO.
- Measured using Brookfield Viscometer at 25°C/ 77°F.
- Mix ratio based on volume and weight for both machine dispensing and hand mixing.
- Tested to BS EN ISO 527-2
- Metals test to ASTM D1002 for Lap Shear Strength, Composites and Marine Ply test to ASTM for Lap Shear Stength, Balsa tested to ASTM D3807 for Cleavage Peel. 23°C.
- Adhesive Failure When Tested
- Substrate Failure When Tested
| Value | Units | Test Method / Conditions | |
| Hardness | 65 | Shore D | — |
| Tensile Strength⁵ | 22 - 25 | MPa | — |
| Tensile Modulus⁵ | 1000 - 1500 | MPa | — |
| Tensile Elongation³ | 100 - 120 | % | — |
| Lap Shear Cohesive Strength⁶ | 12 - 15 | MPa | — |
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 1.05 | — | — |
| Mixed Ratio⁴ (by volume) | 50:1 | — | — |
| Value | Units | Test Method / Conditions | |
| Working Time¹ | 25 | Minutes | — |
| Fixture Time² | 2.5 | Hours | — |
| Gap Filling | 1 - 20 | — | — |
| Color Change (over cure) | None | — | — |
| Recommended Application Temperature | 18 - 25 | °C | — |
Technical Details & Test Data
- Comparisons with Competitive Materials
Crestomer® adhesives are one of a wide variety of materials that can be used in bonded assemblies. Compared to other adhesives, Crestomers offer the following benefits:
- Monomer type identical to polyester resins
- Cured with conventional peroxides
- Low exotherm during cure
- Available in a range of working and fixture times
- Ease of application
- Cost effective
High exotherm in an adhesive can cause the substrate to distort and give poor esthetic characteristics to the parts being bonded. The chemistry of Crestomer® adhesives ensures
that high exotherm temperatures, a characteristic of some other adhesives do not occur. The graph shows the exotherm temperatures of Crestomer® adhesives over a range of test temperatures.FRP to FRP bond strength
Exotherm of Crestomer® adhesives
High exotherm in an adhesive can cause the substrate to distort and give poor aesthetic characteristics to the parts being bonded. The chemistry of Crestomer® adhesives ensures that high exotherm temperatures, a characteristic of some other adhesives, does not occur. The graph shows the exotherm temperatures of Crestomer® adhesives over a range of test temperatures.
- Surface Preparation
As with all adhesives, maximum performance is only acheived with adequate surface preparation. When bonding the back service of (polyester) GRP, a simple solvent wipe with acetone is a satisfactory pre-treatment to clean and degrease the surface. However, for gelcoated GRP surfaces and for other substrates, a de-grease using acetone or similar followed by abrasion and a final de-grease is recommended.
- Recommended Substrates
Crestomer® adhesives are one of a wide variety of materials that can be used in bonded assemblies. Compared to other adhesives, Crestomers offer the following benefits:
- Monomer type identical to polyester resins
- Cured with conventional peroxides
- Low exotherm during cure
- Available in a range of working and fixture times
- Ease of application
- Cost effective
High exotherm in an adhesive can cause the substrate to distort and give poor esthetic characteristics to the parts being bonded. The chemistry of Crestomer® adhesives ensures
that high exotherm temperatures, a characteristic of some other adhesives do not occur. The graph shows the exotherm temperatures of Crestomer® adhesives over a range of test temperatures.FRP to FRP bond strength
Exotherm of Crestomer® adhesives
High exotherm in an adhesive can cause the substrate to distort and give poor esthetic characteristics to the parts being bonded. The chemistry of Crestomer® adhesives ensures that high exotherm temperatures, a characteristic of some other adhesives, does not occur. The graph shows the exotherm temperatures of Crestomer® adhesives over a range of test temperatures.
Packaging & Availability
- Regional Availability
- Packaging Information
Crestomer 1151A is supplied in 25Kg/ 55 lbs and 200Kg/ 440lbs containers
Storage & Handling
- Shelf Life
- 12 Months
- Storage and Shelf Life
- Crestomer 1151PA should be stored between 2°C and 23°C/ 36°F and 73°F in the original unopened container in a dry well ventilated place. Protect from freezing and direct sunlight. Avoid contact with oxidizing agents. Exposure to temperatures outside these conditions will affect shelf life. Ideally containers should be opened only immediately prior to use.
- The shelf life for Crestomer products is defined from date of manufacture if stored as recommended. The expiry date is indicated on the product labels.