초록

A phenol-formaldehyde resol to which urea has been added is mixed with a boric acid-hydroxyl-amide component to provide high temperature resistant binder compositions for use in the manufacture of thermally stable bonded mineral fibre insulation structures.

대표청구항 ▼

A method of preparing a high temperature resistant, thermosetting, water-dilutable binder composition suitable for use in a binder system for mineral fibers, comprising mixing at a temperature of about 20°to 80°C. in an aqueous medium (a) a mixture of 1 mole of boric acid and about 0.9 to 2 moles of

A method of preparing a high temperature resistant, thermosetting, water-dilutable binder composition suitable for use in a binder system for mineral fibers, comprising mixing at a temperature of about 20°to 80°C. in an aqueous medium (a) a mixture of 1 mole of boric acid and about 0.9 to 2 moles of soluble hydroxyl compound chosen from diol, polyol, aldose and ketose; (b) about 0.5 to 1.5 moles of a nitrogen containing compound chosen from dicyandiamide, melamine and guanidine; and (c) a phenol-formaldehyde resol to which urea has been added; said phenol-formaldehyde resol-urea mixture having a pH in the range of 7.5 to 10; and being added in a weight ratio of between 2:1 and 3:1 to the weight of components (a) and (b), and containing urea in the ratio of phenol-formaldehyde to urea between 70:30 and 40:60 parts by weight, and said phenol-formaldehyde resol having a phenol to formaldehyde molar ratio of between 1:3 and 1:4.5; and adjusting the Ph of the final composition to fall in the range of about 8.5 to 9.5. A high temperature resistant, thermosetting, water-dilutable binder composition suitable for use in the manufacture of thermally stable bonded mineral fiber structures, comprising in a ratio of between 1:2 and 1:3 parts by weight of boric acid-hydroxyl-amide component and a phenol-formaldehyde resol to which urea has been added, said composition having a pH adjusted to fall in the range of about 8.5 to 9.5, said boric acid-hydroxyl-amide component being prepared by mixing at a temperature of about 20°to 80°C. in an aqueous medium 1 mole of boric acid with about 0.9 to 2 moles of a soluble hydroxyl compound chosen from diol, polyol, aldose and ketose and adding 0.5 to 1.5 moles of a nitrogen containing compound chosen from dicyandiamide, melamine and guanidine; and said phenol-formaldehyde resol-urea mixture having a pH in the range of 7.5 to 10 and containing urea in a ratio of phenol-formaldehyde to urea between 70:30 and 40:60 parts by weight, and said phenol-formaldehyde resol having a phenol to formaldehyde molar ratio of between 1:3 and 1:4.5.