PHENOL RESIN FOR SIZING COMPOSITION, A METHOD FOR PREPARATION THEREOF, AND SIZING COMPOSITION CONTAINING THEREOF Russian patent published in 2004 - IPC

FIELD: polymer materials. SUBSTANCE: invention, in particular, relates to phenol resin for use in composition intended for sizing mineral wool-based material such as insulating materials in the form of felt or covering. Composition based on urea- modified phenol-formaldehyde resol contains supercondensed resol, i. e. such as obtained via phenol-formaldehyde condensation in alkali medium to give product showing, in the end of reaction, dilatability with water 400 to 2000% at pH 9, or neutralization product thereof. EFFECT: reduced level of volatile phenol derivatives in composition and increased dilatability. 26 cl, 2 tbl, 8 ex