abstract |
A METHOD (AND PRODUCT THEREFORM) OF MANUFACTURING ZINC-MODIFIED PHENOL-FORMALDEHYDE NOVOLAK RESINS FOR USE AS COLOR-DEVELOPING MATERIALS IN PRESSURE-SENSITIVE RECORD SHEET MATERIAL. THE METHOD INVOLVES THE USE OF ZINC DIBENZOATE AND A WEAK BASE, FOR TREATMENT OF THE CHOSEN NOVOLAK IN A HOT MELT REACTION. |