Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
Applications & Uses
- Application Area
- Compatible Substrates & Surfaces
- Application
Recommended substrates:
Recommended substrates
Metals
Stainless Steel Aluminum Wood
Marine ply Balsa Composites
GRP/FRP Polyester resin DCPD Vinyl ester Epoxy Exotherm of Crestomers®:
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.
Surface preparation:
Crestomer® Bio 1140PA has excellent adhesion to FRP material provided that the surface has been maintained free of dust and grease. This can be guaranteed by the use of propietary stripable cloths such as peel ply (without lubricant contaminates). If the laminate surface is more than three days old it is recommended that they are lightly abraded and wiped with acetone or stirene on a lint-free, clean cloth prior to bonding.
Application:
Crestomer® Bio 1140PA is supplied pre-accelerated. The required hardner is a medium reactivity MEKP catalyst. The catalyst is added at 2% v/w. Crestomer® Bio 1140PA can be applied with a spatula or from a dispensing unit, taking care to keep air entrapment to a minimum. The maximum dimensions recommended are gap height 15mm and joint width 40mm. Bulk volumes of Crestomer® Bio 1140PA may lead to unsatisfactory cure and reduced mechanical performance. Application should always be carried out at temperatures above 15°C. Recommended temperature range for application is between 18°C and 25°C and 77°F.
Properties
- Appearance
- Mauve gel
- Mechanical Properties
- Typical Properties in Liquid State
- Application Properties
- Note
¹ - Gel time measured with 100g mass of adhesive at 25°C. Using 2% medium reactivity MEKP catalyst.
² - Time taken at 24°C (ambient temperature) to achieve 1.4MPa strength in lap-shear tests according to BS ISO 4587:2003
³ - Tested to ASTM D638.
⁴ - Tested to BS EN ISO 62
⁵ - Measured using Brookfield Viscometer at 25°C.
⁶ - Mix ratio based on volume and weight for both machine dispensing and hand mixing.
⁷ - The shelf life for Crestomer® products is defined from the date of manufacture if stored as recommended.
| Value | Units | Test Method / Conditions | |
| Tensile Strength³ | 27 - 30 | MPa | — |
| Tensile Modulus³ | 1500 - 1900 | MPa | — |
| Tensile Elongation³ | min. 40 | % | — |
| Hardness | 66 | — | Shore D |
| Water Adsorption⁴ | 0.36 | % | — |
| Value | Units | Test Method / Conditions | |
| Viscosity⁵ | 250,000 - 320,000 | cP | — |
| Specific Gravity | 1.05 | — | — |
| Volatile Content | 35 | % | — |
| Mixed Ratio (by volume)⁶ | 50:1 | — | — |
| Value | Units | Test Method / Conditions | |
| Working Time¹ | 85 | min | — |
| Fixture Time² | 4 | hours | — |
| Gap Filling | 1 - 15 | mm | — |
| Recommended Application Temperature | 18 - 25 | °C | — |
Packaging & Availability
- Packaging Type
- Packaging Information
Crestomer® Bio 1140PA is supplied in 25kg/55 lbs and 200kg/440lbs containers.
Storage & Handling
- Shelf Life
- 6 months⁷
- Storage Conditions
Crestomer® Bio 1140PA should be stored in its original container and out of direct sunlight. It is recommended that the storage temperature should be between 15°C and 20°C and 68oF. Ideally containers should be opened only immediately prior to use. Products should never be frozen. The shelf life for Crestomer® products is defined from date of manufacture if stored as recommended.