Knowde Enhanced TDS
Identification & Functionality
- CASE Ingredients Functions
- Technologies
Features & Benefits
- Product Highlights
BENEFITS
- Good Salt-Spray Resistance
- Low Free Formaldehyde
- Good flexibility properties
APPLICATION AREAS
- Automotive Top Coat
- AED Coating
- General Metal Finishes
Applications & Uses
- Applications
- Compatible Polymers & Resins
- Compatible Substrates & Surfaces
- Coating Type
Properties
- Physical Form
- Appearance
- Clear Liquid
- Typical Properties
- Solubility & Compatibility
SOLUBILITY
Alcohol Complete Esters Complete Ketones Complete Aromatic hydrocarbons Complete Aliphatic hydrocarbons Complete Water Insoluble COMPATIBILITY
Acrylic resins Very good Alkyd resins Very good Polyester resins Very good Epoxy resins Very good
| Value | Units | Test Method / Conditions | |
| Color | max. 1 | Gardner | — |
| Non-Volatile Content | min. 97 | %wt | — |
| Free Formaldehyde Content | max. 0.5 | % | — |
| Viscosity (25°C) | S-X | — | — |
Technical Details & Test Data
- Backbone Polymer Selection
CYMEL 235 resin is a versatile crosslinking agent for a wide range of polymeric materials containing carboxyl, hydroxyl or amide functionalities such as acrylic, alkyd, polyester and epoxy resins.
- Catalysis
The cross-linking reaction follows the reaction pathway for specific acid catalysis and requires an acid catalyst with pKa value of <1. Strong acids, which include the mineral acids and the organic sulfonic acids such as CYCAT 4040 catalyst, CYCAT 600 and CYCAT 500 catalyst, are the most widely used catalysts for systems using CYMEL 235 resin.
- Stability
FORMULATION STABILITY
Finishes using CYMEL 235 resin as the cross-linking agent can be stabilized very effectively with amines as well as alcohols. In many high-solids formulations it is not practical to incorporate a sufficiently high level of alcohol to maintain adequate enamel stability. Good stability has been obtained in high solids systems by using 25% of the added solvent as primary alcohol such as n-butanol and blocking the acid catalyst with 110% of the stoichiometric equivalent of an amine such as di-isopropanol amine.
STORAGE STABILITY
CYMEL 235 resin has a shelf life of 540 days from the date of manufacture when stored at temperatures between 5°C and 30°C packed in unopened original containers. CYMEL 235 resin must be kept indoors and avoided the direct sunlight exposure. Although lower temperatures are not detrimental to stability, its viscosity will increase, possibly making the resin difficult to pump or pour. The viscosity will reduce again on warming, but care should be taken to avoid excessive local heat as this can cause an irreversible increase in viscosity.
Storage & Handling
- Shelf Life
- 540 Days