The invention relates to a sizing composition intended to be applied to mineral fibers, especially glass or rock fibers, which contains at least one polycarboxylic acid and at least one polyamine. It also relates to a method of preparing the composition, to its use for sizing mineral fibers for the
The invention relates to a sizing composition intended to be applied to mineral fibers, especially glass or rock fibers, which contains at least one polycarboxylic acid and at least one polyamine. It also relates to a method of preparing the composition, to its use for sizing mineral fibers for the purpose of forming, in particular, thermal and/or acoustic insulation products, and to the products obtained.
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1. A thermal and/or acoustic insulation product, comprising mineral fibers and a thermally crosslinkable sizing composition consisting of at least one polycarboxylic acid, at least one polyamine, and from 0 to 20 parts of an oil,0 to 2 parts of a silane,0 to 5 parts of a catalyst,optionally water; a
1. A thermal and/or acoustic insulation product, comprising mineral fibers and a thermally crosslinkable sizing composition consisting of at least one polycarboxylic acid, at least one polyamine, and from 0 to 20 parts of an oil,0 to 2 parts of a silane,0 to 5 parts of a catalyst,optionally water; and0 to 20 parts of a plasticizer,wherein the amounts are expressed in parts by weight per 100 parts by weight of dry matter of the at least one polycarboxylic acid and at least one polyamine,wherein the insulation product is manufactured by internal or external centrifugal fiberizing. 2. The product as claimed in claim 1, wherein the polycarboxylic acid has a functionality, expressed by the number of carboxylic groups that can react with the polyamine, equal to or greater than 2. 3. The product as claimed in claim 1, wherein the polycarboxylic acid has a molecular mass ranging from 50 to 105 g/mol. 4. The product as claimed in claim 1, wherein the polycarboxylic acid is a carboxylic acid with a functionality equal to 2, a carboxylic acid with a functionality equal to 3, or a carboxylic acid with a functionality equal to 4. 5. The product as claimed in claim 4, wherein the carboxylic acid is citric acid, tartaric acid or 1,2,3,4-butanetetracarboxylic acid (BTCA). 6. The product as claimed in claim 2, wherein the polycarboxylic acid is chosen from oligomers and polymers that are obtained by homopolymerization of unsaturated acids, or by copolymerization of one or more of these monomers with one or more other, hydrophilic and/or hydrophobic, unsaturated monomers selected from olefins, and macromonomers having terminal unsaturation. 7. The product as claimed in claim 6, wherein the polycarboxylic acid is a polyacrylic copolymer. 8. The product as claimed in claim 1, wherein the polyamine has a functionality, expressed by the number of amine functional groups, equal to or greater than 2. 9. The product as claimed in claim 1, wherein the amine functional groups are primary and/or secondary amine functional groups. 10. The product as claimed in claim 1, wherein the polyamine is chosen from aliphatic polyamines having a saturated or unsaturated, linear or branched chain, possibly containing one or more heteroatoms, and aromatic polyamines. 11. The product as claimed in claim 1, wherein the polyamine has a molecular mass of less than 1000 g/mol. 12. The product as claimed in claim 1, wherein the polyamine is chosen from: compounds of formula: in which: x varies from 2 to 10 and y varies from 1 to 10; polyethyleneimines, polyaminostyrenes, and products resulting from the degradation of chitin in basic medium (chitosans). 13. The product as claimed in claim 1 wherein the polycarboxylic acid is present in an amount of 20 to 80 parts by weight of the dry matter of the sizing composition and wherein the polyamine is present in an amount of 80 to 20 parts by weight of the dry matter of the sizing composition. 14. The product of claim 1, wherein the mineral fibers are glass fibers or rock fibers. 15. The product of claim 1, which is a veil of mineral fibers with a grammage of between 10 and 300 g/m2. 16. A method of manufacturing the insulation product of claim 1, comprising preparing a thermally crosslinkable sizing composition by diluting or emulsifying, in water, the at least one polycarboxylic acid and the at least one polyamine; optionally adding at least one of the oil, the silane, the catalyst, and the plasticizer to the sizing composition after the polycarboxylic acid is added; applying the sizing composition to the mineral fibers, and heating the sized mineral fibers to cure the sizing composition. 17. The method as claimed in claim 16, wherein the polycarboxylic acid is present in an amount of at least 10% by weight of a solution resulting from the diluting or emulsifying and the polyamine is present in an amount of at least 10% by weight of a solution resulting from the diluting or emulsifying. 18. The method as claimed in claim 16, wherein the thermally crosslinkable sizing composition is heated to a temperature of about 50 to 100° C. before being applied to the mineral fibers.
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