Patent ID: 6793772
Filing Date: 2004-09-21
Classification: C08G,C08L,D01F,D04H,Y10T

Abstract:
A method of thermally or acoustically insulating a building, said method comprising installing a mat-form insulating material in the building,wherein the insulating material comprises form 5 to 95% by weight of at least one modified melamine resin fiber and from 5 to 95% by weight of a polyalkylene terephthalate fiber, wherein said melamine fiber is obtained by condesing a melamine containing mixture with formaldehyde or a formaldehyde-supplying compound in a molar ratio of melamine to formaldehyde within the range from 1:1.15 to 1:4.5, said melamine mixture comprising (A) from 90 to 99.9 mol % of mixture comprising (a) from 30 to 99.9 mol % of melamine and (b) from 1.0 to 70 mol % of a substituted melamine of the general formula I where X1, X2 and X3 are each selected from â€”NH2, â€”NHR1 and â€”NR1R2, subject to the proviso that X1, X2 and X3 are not all â€”NH2, and R1 and R2 are independently selected from hydroxy-C2-C20-alkyl, hydroxy-C2-C4-alkyl-(oxa-C2-C4-alkyl)n, where n is 1 to 5, and amino-C2-C12-alkyl, or mixtures of melamines of formula I, and (B) from 0.1 to 10 mol %, based on (A) and (B), of a compound selected from phenols which are unsubstituted or substituted by radicals selected from C1-C9-alkyl and hydroxyl, C1-C4-alkanes substituted by two or three phenol groups, di(hydroxyphenyl) sulfones and mixtures thereof, wherein the insulating material has a density of from 10 to 150 glâˆ’1, wherein the thickness of the mat-form insulating material is from 20 to 200 mm, wherein the polyalkylene terephthalate fiber is selected from a polyethylene terephthalate fiber, a polybutylene terephthalate fiber or a mixture thereof, wherein the polyalkylene terephthalate fiber is a bicomponent fiber having a core/sheath construction comprising a polyester core and a copolyester sheath, and wherein the melting temperature of the core of the bicomponent fiber is within the range from 200 to 300Â° C., and the melting temperature of the sheath is within the range of from 80 to 150Â° C.