Sizing composition for fibers, in particular mineral fibers, comprising a non-reducing sugar and an inorganic acid ammonium salt, and resulting products

Patent metadata

Field	Value
Publication number	US-9255215-B2
Application number	US-201113378587-A
Country	US
Kind code	B2
Filing date	Nov 29, 2011
Priority date	Nov 30, 2010
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A formaldehyde-free sizing composition for products based on fibers, in particular mineral fibers, such as fibers of glass or of rock, includes at least one non-reducing sugar, and at least one inorganic acid ammonium salt, preferably chosen from ammonium sulfates, phosphates, nitrates and carbonates. Another subject matter of the present invention is the products thus obtained, in particular thermal and/or acoustic insulators based on mineral wool and veils of nonwoven mineral fibers, and their process of manufacture.

First claim

What is claimed is:

1. An aqueous formaldehyde-free sizing composition for mineral wool consisting of:
sucrose,
ammonium sulfate,
wherein the ammonium sulfate represents from 3 to 20% by weight of the mixture of sucrose and ammonium sulfate; and
one or more additives below in the following proportions, calculated on the basis of 100 parts by weight of non-reducing sugar and of inorganic acid ammonium salt:
from 0 to 2 parts of silane,
from 4 to 15 parts of mineral oil,
from 0 to 20 parts of glycerol,
from 0 to 5 parts of a silicone,
from 0 to 30 parts of an extender.

2. An acoustic and/or thermal insulating product based on mineral wool sized using the sizing composition as claimed in claim 1 .

3. The product as claimed in claim 2 , wherein the mineral wool is glass wool or rock wool.

4. A process for the manufacture of an acoustic and/or thermal insulating product, according to which a mineral wool is manufactured, the process comprising
applying a sizing composition to said wool; and
treating said wool at a temperature which makes possible the crosslinking of the size and the formation of an infusible binder, wherein the sizing composition as claimed in claim 1 is used.

5. The composition as claimed in claim 1 , wherein the ammonium sulfate represents from 5 to 15% by weight of the mixture composed of sucrose and ammonium sulfate.

6. The composition as claimed in claim 1 , wherein the one or more additives comprise
from 0 to 10 parts of glycerol.

7. The product as claimed in claim 3 , wherein the glass wool is made of E, C, R or AR (alkali-resistant) glass, and the rock wool is made of basalt fibers including more than 96% by weight of silica.

Assignees

• Jaffrennou Boris
• Obert Edouard
• Saint Gobain Isover

Inventors

• Jaffrennou Boris
• Obert Edouard

Classifications

• D04H1/64

  the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions · CPC title

• D04H1/4209

  Inorganic fibres · CPC title

• D04H1/425

  Cellulose series · CPC title

• Y10T428/249921

  Web or sheet containing structurally defined element or component · CPC title

• D04H1/4218

  Glass fibres · CPC title