Low-chloride mineral wool product

Abstract

The invention relates to a mineral fibre product having a low water leachable chloride content, which is suitable as a non-corrosive thermal and / or acoustic insulating material.

Description

Technical Field

[0001] This invention relates to mineral fiber products and the uses of mineral fiber products. Background Technology

[0002] Mineral fiber products (also known as mineral wool products) typically consist of mineral fibers (also called man-made glass fibers (MMVF)), such as glass fibers, ceramic fibers, basalt fibers, slag fibers, and stone fibers (rock fibers), which are bonded together by a cured thermosetting polymer binder material. For use as thermal or acoustic insulation products, bonded mineral fiber mats are typically produced by converting a melt made from suitable raw materials into fibers in a conventional manner, such as via a spinning cup process or a cascade rotor process. The fibers are blown into a forming chamber and, while still hot in the air, sprayed with a binder solution and randomly deposited as mats or webs onto a traveling conveyor. The fiber mats are then transferred to a curing oven, where hot air is blown over the mats to cure the binder and firmly bond the mineral fibers together.

[0003] In the past, the preferred adhesive resin was phenol-formaldehyde resin, which could be produced economically and chain-extended with urea before being used as an adhesive. However, existing and proposed legislation aimed at reducing or eliminating formaldehyde emissions has led to the development of formaldehyde-free adhesives, such as adhesive compositions based on polycarboxylated polymers and polyols or polyamines, as disclosed in EP-A-583086, EP-A-990727, EP-A-1741726, US-A-5,318,990, and US-A-2007 / 0173588.

[0004] Another class of non-phenol-formaldehyde adhesives are products of addition / elimination reactions of aliphatic and / or aromatic anhydrides with alkanolamines, such as those disclosed in WO 99 / 36368, WO 01 / 05725, WO 01 / 96460, WO 02 / 06178, WO 2004 / 007615, and WO2006 / 061249. These adhesive compositions are water-soluble and exhibit excellent adhesive properties in terms of curing speed and cured density. WO 2008 / 023032 discloses a urea-modified adhesive of this type, which provides mineral wool products with reduced moisture absorption.

[0005] Because some of the raw materials used to produce these adhesives are rather expensive chemicals, there has always been a need for economically produced formaldehyde-free adhesives.

[0006] Another effect associated with previously known aqueous binder compositions derived from mineral fibers is that at least a majority of the starting materials used to produce these binders are derived from fossil fuels. Consumers are increasingly favoring products made entirely or at least partially from renewable materials, thus creating a need for binders for mineral wool that are at least partially made from renewable materials.

[0007] A major problem with using mineral fiber products as insulation or sound insulation for industrial equipment or pipelines is corrosion. Therefore, corrosion under the insulation (CUI) refers to external corrosion of pipelines or equipment that occurs due to the penetration of water or moisture beneath the external insulation layer. The corroded surface is largely hidden by the insulation system and is not observed until the insulation is removed for inspection or in the event of metal failure and / or leakage leading to health and safety incidents. CUI particularly occurs under insulation in steel structures undergoing cyclic temperature changes (e.g., pipelines in the oil and gas industry).

[0008] Corrosion occurs in the presence of water and oxygen. If the equipment or piping (e.g., steel workpieces) under the insulator remains dry, there is no corrosion problem. However, keeping the insulator dry can be difficult. Some types of corrosion can be caused or supported by water-soluble chlorides. Existing binder compositions for mineral fibers can contain significant amounts of water-soluble chlorides. Therefore, the mineral fiber product itself may contribute to the corrosion of the insulator components.

[0009] The corrosion risk under carbon steel insulators is considered high in the temperature range of 50 to 175°C and extreme in cyclic temperature operation between -20°C and 320°C. The most common types of CUI are general and pitting corrosion of carbon steel (which may occur if the wet insulator comes into contact with carbon steel), and external stress corrosion traces (ESCT) of austenitic stainless steel, which is a specific type of corrosion caused primarily by the action of water-soluble chlorides. Summary of the Invention

[0010] Therefore, one object of the present invention is to provide a mineral fiber product for an insulating body that reduces corrosivity to the insulating object, and can be economically prepared and used as a starting material to prepare an aqueous binder composition for the production of the mineral fiber product.

[0011] Another object of the present invention is to provide the use of this mineral fiber product.

[0012] According to a first aspect of the invention, a mineral fiber product is provided comprising mineral fibers bonded by a cured binder composition, wherein the uncured binder composition comprises one or more lignin sulfonate lignins having a carboxylic acid group content of 0.03-1.4 mmol / g based on the dry weight of the lignin sulfonate lignins, wherein the mineral fiber product is leached in water according to EN 13468:2001 with a chloride content of less than 10 mg / kg.

[0013] According to a second aspect of the invention, the use of a mineral fiber product as a thermal and / or sound insulation material, particularly a non-corrosive thermal and / or sound insulation material, is provided. The mineral fiber product comprises mineral fibers bonded by a cured binder composition, the uncured binder composition comprising one or more lignin sulfonate lignins having a carboxylic acid group content of 0.03 to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignin, wherein the mineral fiber product optionally has a water-leached chloride content of less than 10 mg / kg according to EN 13468:2001.

[0014] According to a third aspect of the invention, a method for manufacturing a mineral fiber product is provided, the mineral fiber product comprising mineral fibers bonded by a cured binder composition, the uncured binder composition comprising one or more lignin sulfonate lignins, the lignin sulfonate lignins having a carboxylic acid group content of 0.03 to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignins, wherein the mineral fiber product is optionally leached in water according to EN 13468:2001 with a chloride content of less than 10 mg / kg, the method comprising the following steps:

[0015] a) Provides an uncured aqueous binder composition comprising one or more lignin sulfonate lignins and water,

[0016] b) Contact the mineral fibers with the uncured aqueous binder composition, and

[0017] c) Curing the adhesive composition in contact with the mineral fibers.

[0018] The water contained in the uncured waterborne adhesive composition, at least part or all of which is added non-purified water, wherein the non-purified water is preferably selected from tap water, rainwater, process water or a combination thereof.

[0019] Preferably, the lignin sulfonate lignin has a carboxylic acid group content of 0.03-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0020] According to a fourth aspect of the invention, a hollow object covered with a mineral fiber product as a thermal and / or sound insulation body is provided, wherein the mineral fiber product comprises mineral fibers bonded by a cured adhesive composition, the uncured adhesive composition comprising one or more lignin sulfonate lignins having a carboxylic acid group content of 0.03-1.4 mmol / g based on the dry weight of the lignin sulfonate lignins, wherein the mineral fiber product is optionally leached in water according to EN 13468:2001 with a chloride content of less than 10 mg / kg.

[0021] The inventors have discovered that when lignin sulfonate-based binder compositions are used in mineral fiber products, the mineral fiber products can be used as low-corrosive or even non-corrosive thermal and / or sound insulation materials. This binder composition exhibits a surprisingly low water-leached chloride content. Detailed Implementation Plan

[0022] The mineral fiber product of the present invention comprises mineral fibers bonded by a cured binder composition, wherein the uncured binder composition comprises one or more lignin sulfonate lignins, the lignin sulfonate lignins having a carboxylic acid group content of 0.03 to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignins, wherein the water-leached chloride content of the mineral fiber product according to EN 13468:2001 is less than 10 mg / kg, wherein the water-leached chloride content according to EN 13468:2001 is preferably less than 6 mg / kg.

[0023] For the purposes of this application, the water-leached chloride content of mineral fiber products is measured according to EN 13468:2001. Standard EN 13468:2001 specifically relates to the determination of trace water-soluble chlorides in insulation products for building equipment and industrial installations. This standard specifies the equipment and procedures for determining trace water-soluble chlorides in aqueous extracts of the products. For details, refer to this standard.

[0024] The water-leached chloride content is given in mg chloride / kg mineral fiber product. Leaching was performed at 100°C for 0.5 h, referring to Table 1 in the EN standard. Sample preparation was performed according to EN 13468 7.2.1. Analysis was performed according to EN 13468 7.2.2.2 (determined by ion chromatography).

[0025] The inventors have discovered that the mineral fiber product of this invention has a surprisingly low water-leached chloride content. This is even true when using unpurified water, such as tap water or process water, to prepare the uncured binder composition. As is known to those skilled in the art, unpurified water can contain considerable amounts of chloride.

[0026] Not wishing to be bound by any particular theory, the inventors believe that even when tap water or process water is used to prepare the binder composition, the low water-leached chloride content of the mineral fiber products of the present invention is at least in part based on the capture of chloride ions within the binder matrix based on lignin sulfonate lignin. This capture prevents chloride leaching, thus rendering it unsuitable for corrosive activity.

[0027] Typically, uncured adhesive compositions are water-based adhesive compositions. The water contained in a water-based adhesive composition can be purified water, non-purified water, or a combination of purified and non-purified water.

[0028] In a preferred embodiment, the uncured adhesive composition is an aqueous adhesive composition, wherein at least part or all of the water contained in the aqueous adhesive composition is untreated water, and the remaining water (if any) is treated water. This is surprising, as treated water is typically used in common prior art adhesives to avoid substantial chloride content. Examples of treated water are permeated water, deionized water, or distilled water, which are further disclosed below.

[0029] Purified water is typically water that has undergone mechanical filtration or processing to remove impurities and make it usable. Distilled water is the most common form of purified water, but in recent years, water has been more frequently purified by other methods, including capacitive deionization, reverse osmosis, carbon filtration, microfiltration, ultrafiltration, ultraviolet oxidation, or electro-deionization. Preferably, the purified water used in the uncured binder composition has a chloride content of less than 10 mg / L, preferably less than 5 mg / L.

[0030] Suitable examples of unpurified water are tap water, rainwater, process water, or combinations thereof. Tap water and rainwater typically have a chloride content in the range of 10-200 mg / L. Process water typically has a chloride content in the range of 25-200 mg / L. Preferably, the unpurified water used in the uncured binder composition may have a chloride content of at least 10 mg / L, for example, 10-200 mg / L.

[0031] The proportion of non-purified water added can be in the range of 0-100 wt%, preferably 30-100 wt%, and most preferably 50-100 wt%, based on the total weight of water contained in the uncured adhesive composition, with other proportions (if any) being purified water.

[0032] In the manufacturing plant, the binder composition is typically produced in a concentrated form, meaning the water content is kept low. After delivery, the concentrated binder composition is diluted to a suitable viscosity by adding water at the mineral fiber production site. The diluted binder composition is then brought into contact with the mineral fibers and cured to produce a mineral fiber article. A benefit of this invention is that the concentrated binder composition can be diluted with unpurified water such as tap water, rainwater, or process water, and a product with low water-leached chloride content is still obtained.

[0033] The mineral wool product of the present invention comprises mineral fibers in contact with an adhesive, the adhesive being produced by curing a phenol- and formaldehyde-free aqueous adhesive composition comprising:

[0034] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03 to 2.0 mmol / g, for example 0.03 to 1.4 mmol / g, for example 0.075 to 2.0 mmol / g, for example 0.075 to 1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0035] - Components in the form of one or more crosslinking agents (ii);

[0036] - Components in one or more optional plasticizer forms (iii).

[0037] In particular, according to a first aspect of the invention, a mineral fiber product is provided comprising mineral fibers in contact with an adhesive obtained by curing a phenol- and formaldehyde-free aqueous adhesive composition comprising:

[0038] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0039] - Components in the form of one or more crosslinking agents (ii);

[0040] - Components in one or more optional plasticizer forms (iii),

[0041] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0042] • Epoxy compounds with a molecular weight (Mw) of 500 or lower.

[0043] In particular, according to a first aspect of the invention, a mineral fiber product is provided comprising mineral fibers in contact with an adhesive obtained by curing a phenol- and formaldehyde-free aqueous adhesive composition comprising:

[0044] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03 to 2.0 mmol / g, for example 0.03 to 1.4 mmol / g, for example 0.075 to 2.0 mmol / g, for example 0.075 to 1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0045] - Components in the form of one or more crosslinking agents (ii);

[0046] - Components in one or more optional plasticizer forms (iii),

[0047] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0048] • Carbonyl compounds, selected from aldehydes, formula R-[C(O)R1] x carbonyl compounds,

[0049] in:

[0050] R represents a saturated or unsaturated, straight-chain, branched, or cyclic hydrocarbon group, containing one or more aromatic nuclei consisting of 5 or 6 carbon atoms, or containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and oxygen, nitrogen, or sulfur atoms. The R group may contain other functional groups.

[0051] R1 represents a hydrogen atom or C1-C. 10 Alkyl groups, and

[0052] x varies between 1 and 10.

[0053] In particular, according to a first aspect of the invention, a mineral fiber product is provided comprising mineral fibers in contact with an adhesive obtained by curing a phenol- and formaldehyde-free aqueous adhesive composition comprising:

[0054] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03 to 2.0 mmol / g, for example 0.03 to 1.4 mmol / g, for example 0.075 to 2.0 mmol / g, for example 0.075 to 1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0055] - Components in the form of one or more crosslinking agents (ii);

[0056] - Components in one or more optional plasticizer forms (iii),

[0057] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0058] • Polyamines.

[0059] In particular, according to a first aspect of the invention, a mineral fiber product is provided comprising mineral fibers in contact with an adhesive obtained by curing a phenol- and formaldehyde-free aqueous adhesive composition comprising:

[0060] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0061] - Components in the form of one or more crosslinking agents (ii);

[0062] - Components in one or more optional plasticizer forms (iii),

[0063] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0064] Monosaccharides and oligosaccharides.

[0065] In one embodiment, the mineral wool product according to the invention comprises mineral fibers in contact with an adhesive produced by curing a phenol- and formaldehyde-free aqueous adhesive composition comprising:

[0066] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03 to 2.0 mmol / g, for example 0.03 to 1.4 mmol / g, for example 0.075 to 2.0 mmol / g, for example 0.075 to 1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0067] - Component (ii) in the form of one or more crosslinking agents, said crosslinking agent being selected from:

[0068] -β-hydroxyalkylamide crosslinking agent, and / or

[0069] - Epoxy compounds with a molecular weight greater than 500, such as epoxidized oils based on fatty acid triglycerides or one or more flexible oligomers or polymers, such as low-Tg acrylic polymers, low-Tg vinyl-based polymers, low-Tg polyethers, containing reactive functional groups, such as carbodiimide groups, anhydride groups, oxazoline groups, amino groups, epoxy groups, and / or

[0070] - One or more crosslinking agents in the form of multifunctional carbodiimides, such as aliphatic multifunctional carbodiimides; and / or

[0071] -Primid XL-552;

[0072] - Components in one or more optional plasticizer forms (iii),

[0073] The condition is that the adhesive composition does not contain a crosslinking agent selected from the following:

[0074] Epoxy compounds with a molecular weight (Mw) of 500 or lower

[0075] • Carbonyl compounds, selected from aldehydes, formula R-[C(O)R1] x carbonyl compounds,

[0076] in:

[0077] R represents a saturated or unsaturated, straight-chain, branched, or cyclic hydrocarbon group, containing one or more aromatic nuclei consisting of 5 or 6 carbon atoms, or containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and oxygen, nitrogen, or sulfur atoms. The R group may contain other functional groups.

[0078] R1 represents a hydrogen atom or C1-C. 10 Alkyl groups, and x varies between 1 and 10.

[0079] • Polyamines.

[0080] In a preferred embodiment, the adhesive is formaldehyde-free.

[0081] For the purposes of this application, the term "formaldehyde-free" is defined as characterizing mineral wool products in which formaldehyde emissions from the mineral wool products are less than 5 μg / m³. 2 / h, preferably below 3μg / m 2 / h. Preferably, the aldehyde emissions are tested according to ISO 16000.

[0082] In a preferred embodiment, the adhesive is phenol-free.

[0083] For the purposes of this application, the term "phenol-free" is defined in a way that makes the waterborne adhesive composition free of phenol

[0084]

[0085] The amount is ≤0.25wt%, for example ≤0.1wt%, for example ≤0.05wt%, based on the total weight of the aqueous composition having a dry solid binder content of 15wt%.

[0086] In one embodiment, the adhesive composition does not contain added formaldehyde.

[0087] In one embodiment, the adhesive composition does not contain added phenol.

[0088] For the purposes of this application, the term "monosaccharide and oligosaccharide" is defined as including monosaccharides and oligosaccharides having 10 or fewer sugar units.

[0089] For the purposes of this application, the term "sugar" is defined as including monosaccharides and oligosaccharides having 10 or fewer sugar units.

[0090] The uncured binder composition used to prepare the mineral fiber products of the present invention comprises one or more lignin sulfonates as component (i).

[0091] Component (i)

[0092] Component (i) is in the form of one or more lignin sulfonate lignins having a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0093] Lignin, cellulose, and hemicellulose are the three main organic compounds in plant cell walls. Lignin can be considered the glue that holds cellulose fibers together. Lignin contains both hydrophilic and hydrophobic groups. It is the second most abundant natural polymer in the world, after cellulose, and is estimated to account for as much as 20-30% of the total carbon contained in biomass, exceeding 1 billion tons globally.

[0094] The lignin sulfonate process introduces a large number of sulfonate groups, making lignin soluble in water but also in acidic aqueous solutions. Lignosulfonates contain up to 8% sulfur as sulfonates, while sulfate lignin contains 1-2% sulfur, primarily bonded to lignin. The molecular weight of lignin sulfonates ranges from 15,000 to 50,000 g / mol. The typically hydrophobic core of lignin, along with the large number of ionized sulfonate groups, makes lignin attractive as a surfactant, and it is commonly used to disperse substances in cement, etc.

[0095] To produce lignin-based value-added products, lignin must first be separated from biomass, and several methods can be used for this purpose. Sulfate and sulfite pulping processes are renowned for their efficient separation of lignin from wood and are therefore used worldwide. Sulfate lignin is separated from wood using NaOH and Na₂S. Lignin from sulfite pulping processes is called lignin sulfonate and is produced using sulfites and / or sulfites containing magnesium, calcium, sodium, or ammonium at different pH levels. Currently, lignin sulfonates account for 90% of the total commercial lignin market, and the global annual production of lignin sulfonates is approximately 1.8 million tons. Lignosulfonates typically have abundant sulfonic acid groups and therefore a higher sulfur content than sulfate lignin. Due to the presence of sulfonated groups, lignin sulfonates are anionicly charged and water-soluble. The molecular weight (Mw) of lignin sulfonates can be similar to or greater than that of sulfate lignin. Due to their unique properties, lignin sulfonates have a wide range of applications, such as animal feed, pesticides, surfactants, additives in oil drilling, stabilizers in colloidal suspensions, and plasticizers in concrete admixtures. However, most new pulp mills use sulfate technology for pulp production, making sulfate lignin more readily available for value-added production.

[0096] However, lignin sulfonates and sulfate lignins exhibit different properties due to different separation methods, resulting in different functional group distributions. The high level of sulfonic acid groups in lignin sulfonates, typically at least one for every four C9 units, makes them strongly charged at all pH levels in water. This abundance of ionizable functional groups explains most of the differences compared to lignins processed with other methods. The higher charge density compared to sulfate lignin allows for greater water solubility and a higher solids content in solution. Furthermore, for the same reason, lignin sulfonates will have a lower solution viscosity at the same solids content compared to sulfate lignin, which facilitates processing and handling. Common model structures for lignin sulfonates are shown below. Figure 1 As shown.

[0097] In one embodiment, the carboxylic acid group content of component (i) is 0.05-0.6 mmol / g, for example 0.1-0.4 mmol / g, based on the dry weight of lignin sulfonate lignin.

[0098] In one embodiment, component (i) is in the form of one or more lignin sulfonate lignins, and the average carboxylic acid group content of the lignin sulfonate lignin is less than 1.8 groups / macromolecule, for example less than 1.4, for example less than 1.1, for example less than 0.7, for example less than 0.4, taking into account the average weight of Mn of component (i).

[0099] In one embodiment, the phenolic OH group content of component (i) is 0.3-2.5 mmol / g, for example 0.5-2.0 mmol / g, for example 0.5-1.5 mmol / g, based on the dry weight of lignin sulfonate lignin.

[0100] In one embodiment, the aliphatic OH group content of component (i) is 1.0-8.0 mmol / g, for example 1.5-6.0 mmol / g, for example 2.0-5.0 mmol / g, based on the dry weight of lignin sulfonate lignin.

[0101] In one embodiment, component (i) comprises ammonium lignosulfonate and / or calcium lignosulfonate, and / or magnesium lignosulfonate, and any combination thereof.

[0102] In one embodiment, component (i) comprises ammonium lignosulfonate and calcium lignosulfonate, wherein NH4 + With Ca 2+ The molar ratio is 5:1-1:5, especially 3:1-1:3.

[0103] For the purposes of this invention, the term lignin sulfonate includes sulfonated sulfate lignin.

[0104] In one embodiment, component (i) is sulfonated sulfate lignin.

[0105] In one embodiment, the aqueous binder composition contains an amount of added sugar in the weight of 0-5 wt%, for example less than 5 wt%, for example 0-4.9 wt%, for example 0.1-4.9 wt%, based on lignin sulfonate and sugar.

[0106] In one embodiment, the aqueous adhesive composition comprises component (i), namely lignin sulfonate, in an amount of 50-98 wt%, such as 65-98 wt%, such as 80-98 wt%, based on the total weight of components (i) and (ii).

[0107] In one embodiment, the aqueous adhesive composition comprises component (i), namely lignin sulfonate, in an amount of 50-88 wt%, such as 50-87 wt%, such as 65-88 wt%, such as 65-87 wt%, such as 80-88 wt%, such as 80-87 wt%, based on the total weight of components (i) and (ii).

[0108] In one embodiment, the aqueous adhesive composition comprises component (i) in an amount of 50-98 wt%, such as 65-98 wt%, such as 80-98 wt%, based on the dry weight of components (i), (ii) and (iii).

[0109] In one embodiment, the aqueous adhesive composition comprises component (i) in an amount of 50-88 wt%, such as 50-87 wt%, such as 65-88 wt%, such as 65-87 wt%, such as 80-88 wt%, such as 80-87 wt%, based on the dry weight of components (i), (ii) and (iii).

[0110] For the purposes of this invention, by using 31 P NMR was used as a characterization method to determine the content of lignin functional groups.

[0111] The reaction was carried out using 2-chloro-4,4,5,5-tetramethyl-1,3,2-dioxophosphazenecyclopentane (TMDP) as a phosphorylation reagent and cholesterol as an internal standard. 31 Sample preparation for P NMR. Based on the work of Granata and Argyropoulos (J.Agric.Food Chem.43:1538-1544).

[0112] Component (ii)

[0113] Component (ii) is in the form of one or more crosslinking agents.

[0114] In one embodiment, component (ii) is in the form of one or more crosslinking agents selected from...

[0115] a) β-hydroxyalkylamide crosslinking agents and / or oxazoline crosslinking agents, and / or

[0116] b) Polyfunctional organic amines such as alkanolamines, diamines such as hexamethyldiamine, triamines, and / or

[0117] c) Epoxy compounds with a molecular weight greater than 500, such as one or more flexible oligomers or polymers, such as low-Tg acrylic polymers, low-Tg vinyl-based polymers, low-Tg polyethers, containing reactive functional groups such as carbodiimide groups, anhydride groups, oxazoline groups, amino groups, epoxy groups, and / or

[0118] d) One or more crosslinking agents selected from polyethyleneimine, polyethyleneamine, and aliphatic amines; and / or

[0119] e) One or more crosslinking agents in the form of fatty amides; and / or

[0120] f) One or more crosslinking agents selected from aromatic aldehydes, such as hydroxybenzaldehyde, aminobenzaldehyde, hydroxy-methoxybenzaldehyde, and / or selected from aliphatic aldehydes, such as decanal, and / or

[0121] g) One or more crosslinking agents selected from polyester polyols, such as polycaprolactone; and / or

[0122] h) one or more crosslinking agents selected from starch, modified starch, and CMC; and / or

[0123] i) one or more crosslinking agents in the form of aliphatic multifunctional carbodiimides; and / or

[0124] j) One or more crosslinking agents selected from melamine-based crosslinking agents, such as crosslinking agents based on hexa(methylmethoxy)melamine (HMMM).

[0125] In one embodiment, component (ii) comprises one or more crosslinking agents selected from β-hydroxyalkylamide crosslinking agents and / or oxazoline crosslinking agents.

[0126] β-hydroxyalkylamide crosslinkers are curing agents for acid-functionalized macromolecules. They provide hard, durable, corrosion-resistant, and solvent-resistant crosslinked polymer networks. β-hydroxyalkylamide crosslinkers are believed to cure by forming multiple ester bonds through esterification. The hydroxyl functionality of the β-hydroxyalkylamide crosslinker should ideally be at least 2 on average, preferably greater than 2, and more preferably 2-4, to obtain the optimal curing response.

[0127] Crosslinking agents containing oxazoline groups are polymers containing one or more oxazoline groups in each molecule, and typically, crosslinking agents containing oxazoline groups can be readily obtained by polymerizing oxazoline derivatives. This method is disclosed in US Patent 6,818,699B2.

[0128] In one embodiment, component (ii) is one or more epoxy compounds with a molecular weight greater than 500, such as epoxidized oils based on fatty acid triglycerides or one or more flexible oligomers or polymers, such as low-Tg acrylic polymers, low-Tg vinyl polymers, low-Tg polyethers, containing reactive functional groups, such as carbodiimide groups, such as anhydride groups, such as oxazoline groups, such as amino groups, such as epoxy groups, such as β-hydroxyalkylamide groups.

[0129] In one embodiment, component (ii) is one or more crosslinking agents selected from fatty amines.

[0130] In one embodiment, component (ii) is one or more crosslinking agents in the form of fatty amides.

[0131] In one embodiment, component (ii) is one or more crosslinking agents selected from polyester polyols such as polycaprolactone.

[0132] In one embodiment, component (ii) is one or more crosslinking agents selected from starch, modified starch, and CMC.

[0133] In one embodiment, component (ii) is a crosslinking agent in the form of one or more polyfunctional carbodiimides, such as aliphatic polyfunctional carbodiimides.

[0134] In one embodiment, component (ii) is a crosslinking agent in the form of one or more aziridines, such as CX100, NeoAdd-Pax 521 / 523.

[0135] In one embodiment, component (ii) is one or more crosslinking agents selected from melamine-based crosslinking agents, such as crosslinking agents based on hexa(methylmethoxy)melamine (HMMM).

[0136] Examples of such compounds are Picassian XL 701, 702, and 725 (Stahl Polymers), such as... XL-29SE (Angus Chemical Company), such as CX 300 (DSM), such as Carbodilite V-02-L2 (Nisshinbo Chemical Inc.).

[0137] In one embodiment, component (ii) is Primid XL 552, which has the following structure:

[0138]

[0139] Component (ii) may also be any mixture of the above compounds.

[0140] In one embodiment, the adhesive composition according to the invention comprises 1-50 wt%, for example 4-20 wt%, for example 6-12 wt% of component (ii), based on the dry weight of component (i).

[0141] In one embodiment, component (ii) is one or more crosslinking agents selected from the following forms:

[0142] -β-hydroxyalkylamide crosslinking agents, such as N-(2-hydroxyisopropyl)amide crosslinking agents, such as N-(2-hydroxyethyl)amide crosslinking agents, such as N-(2-hydroxyethyl)hexamethylenediamide crosslinking agents, such as N,N,N′,N′-tetra(2-hydroxyethyl)hexamethylenediamide and / or N-(2-hydroxyethyl)hexamethylenediamide, and / or

[0143] - Polyfunctional organic amines such as alkanolamines, diamines such as hexamethyldiamine, and / or

[0144] - Epoxy compounds with a molecular weight greater than 500, such as epoxidized oils based on fatty acid triglycerides or one or more flexible oligomers or polymers, such as low-Tg acrylic polymers, low-Tg vinyl-based polymers, low-Tg polyethers, containing reactive functional groups, such as carbodiimide groups, anhydride groups, oxazoline groups, amino groups, epoxy groups, and / or

[0145] - One or more crosslinking agents in the form of multifunctional carbodiimides, such as aliphatic multifunctional carbodiimides.

[0146] In one embodiment, component (ii) comprises one or more crosslinking agents selected from:

[0147] -β-hydroxyalkylamide crosslinking agents, such as N-(2-hydroxyisopropyl)amide crosslinking agents, such as N-(2-hydroxyethyl)amide crosslinking agents, such as N-(2-hydroxyethyl)hexamethylenediamide crosslinking agents, such as N,N,N′,N′-tetra(2-hydroxyethyl)hexamethylenediamide.

[0148] In one embodiment, the amount of component (ii) is 2 to 90 wt%, for example 6 to 60 wt%, for example 10 to 40 wt%, for example 25 to 40 wt%, based on the dry weight of component (i).

[0149] Components of the adhesive composition (iii)

[0150] Optionally and preferably, the adhesive composition may include component (iii). Component (iii) is in the form of one or more plasticizers.

[0151] In one embodiment, component (iii) is in the form of one or more plasticizers selected from polyols, such as carbohydrates, hydrogenated sugars, such as sorbitol, erythritol, glycerol, monoethylene glycol, polyethylene glycol, polyethylene glycol ethers, polyethers, phthalates and / or acids, such as adipic acid, vanillic acid, lactic acid and / or ferulic acid, acrylic polymers, polyvinyl alcohol, polyurethane dispersions, ethylene carbonate, propylene carbonate, lactones, lactams, lactide, acrylic polymers having free carboxyl groups and / or polyurethane dispersions having free carboxyl groups, polyamides, amides such as carbamide / urea, or any mixture thereof.

[0152] In one embodiment, component (iii) is in the form of one or more plasticizers selected from carbonates such as ethylene carbonate, propylene carbonate, lactones, lactams, lactide, compounds having a lignin-like structure such as vanillin, acetylsuccinone, solvents used as coalescing agents such as alcohol ethers, and polyvinyl alcohol.

[0153] In one embodiment, component (iii) is in the form of one or more non-reactive plasticizers selected from polyethylene glycol, polyethylene glycol ethers, polyethers, hydrogenated sugars, phthalates and / or other esters, solvents used as coalescing agents such as alcohol ethers, acrylic polymers, and polyvinyl alcohol.

[0154] In one embodiment, component (iii) is one or more reactive plasticizers selected from carbonates such as ethylene carbonate, propylene carbonate, lactones, lactams, lactide, dicarboxylic acids or tricarboxylic acids such as adipic acid or lactic acid, and / or vanillic acid and / or ferulic acid, polyurethane dispersions, acrylic polymers having free carboxyl groups, and compounds having a lignin-like structure such as vanillin and acetylsuccinone.

[0155] In one embodiment, component (iii) is in the form of one or more plasticizers selected from fatty alcohols, monohydroxy alcohols such as pentanol, stearyl alcohol.

[0156] In one embodiment, component (iii) comprises one or more plasticizers selected from polyethylene glycol, polyethylene glycol ether, and / or one or more plasticizers in the form of polyols, such as 1,1,1-tris(hydroxymethyl)propane and / or triethanolamine.

[0157] Another particularly surprising aspect of the invention is that the use of plasticizers with boiling points above 100°C, especially 140-250°C, strongly improves the mechanical properties of the mineral fiber products according to the invention, although these plasticizers may at least partially evaporate during the curing of the binder in contact with the mineral fibers, given their boiling points.

[0158] In one embodiment, component (iii) comprises one or more plasticizers with a boiling point above 100°C, for example 110-380°C, more preferably 120-300°C, and even more preferably 140-250°C.

[0159] It is believed that the effectiveness of these plasticizers in the adhesive compositions described in this invention is related to their effect of increasing the fluidity of lignin during curing. Increased lignin fluidity during curing is believed to contribute to effective crosslinking.

[0160] In one embodiment, component (iii) comprises one or more polyethylene glycols having an average molecular weight of 150-50000 g / mol, particularly 150-4000 g / mol, more particularly 150-1000 g / mol, preferably 150-500 g / mol, and more preferably 200-400 g / mol.

[0161] In one embodiment, component (iii) comprises one or more polyethylene glycols having an average molecular weight of 4,000-25,000 g / mol, particularly 4,000-15,000 g / mol, and more particularly 8,000-12,000 g / mol.

[0162] In one embodiment, component (iii) is capable of forming covalent bonds with components (i) and / or (ii) during the curing process. Such a component does not evaporate and remains as part of the composition, but will be effectively modified to avoid introducing undesirable side effects, such as water absorption in the cured product. Non-limiting examples of such components are caprolactone and acrylic polymers having free carboxyl groups.

[0163] In one embodiment, component (iii) is selected from fatty alcohols, monohydroxy alcohols such as pentanol, and stearyl alcohol.

[0164] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from alkoxylates such as ethoxylates, such as butanol ethoxylates, such as butoxytriethylene glycol.

[0165] In one embodiment, component (iii) is selected from one or more propylene glycols.

[0166] In one embodiment, component (iii) is selected from one or more diol esters.

[0167] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from esters such as bisacyl ester, acetate, benzoate, cyclobenzoate, citrate, stearate, sorbate, sebacyl ester, azelaic acid ester, butyrate, and valerate.

[0168] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from phenol derivatives such as alkyl or aryl substituted phenols.

[0169] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from silanols and siloxanes.

[0170] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from sulfate esters such as alkyl sulfate esters, sulfonates such as alkyl aryl sulfonates such as alkyl sulfonates, phosphate esters such as tripolyphosphates, such as tributyl phosphate.

[0171] In one embodiment, component (iii) is selected from one or more hydroxy acids.

[0172] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from monomeric amides such as acetamide, benzamide, and fatty acid amides such as tallowamide.

[0173] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from quaternary ammonium compounds such as trimethylglycine and distearate dimethylammonium chloride.

[0174] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from vegetable oils such as castor oil, palm oil, flaxseed oil, tall oil, and soybean oil.

[0175] In one implementation, component (iii) is in the form of tall oil.

[0176] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from hydrogenated oils and acetylated oils.

[0177] In one embodiment, component (iii) is selected from one or more fatty acid methyl esters.

[0178] In one embodiment, component (iii) is selected from one or more plasticizers, said plasticizer being selected from alkyl polyglucosides, glucosamides, aminoglucosamides, sucrose esters, and sorbitol esters.

[0179] In one embodiment, component (iii) is selected from polyethylene glycol and polyethylene glycol ether.

[0180] In one embodiment, component (iii) is selected from triethanolamine.

[0181] In one embodiment, component (iii) is in the form of propylene glycol, phenol derivatives, silanols, siloxanes, hydroxy acids, vegetable oils, polyethylene glycol, polyethylene glycol ethers, and / or one or more polyols, such as 1,1,1-tris(hydroxymethyl)propane, triethanolamine, or any mixture thereof.

[0182] Surprisingly, it has been found that the inclusion of plasticizers in the adhesive compositions according to the invention strongly improves the mechanical properties of the mineral fiber products according to the invention.

[0183] The term plasticizer refers to a substance added to a material to make it softer, more flexible (by lowering the glass transition temperature Tg) and easier to process.

[0184] Component (iii) may also be any mixture of the above compounds.

[0185] In one embodiment, the amount of component (iii) is 0.5-60, preferably 2.5-25, more preferably 3-15 wt%, based on the dry weight of component (i).

[0186] In one embodiment, component (iii) is present in an amount of 0.5-60 wt%, preferably 2.5-25 wt%, more preferably 3-15 wt%, based on the dry weight of components (i), (ii) and (iii).

[0187] Mineral fiber products comprising mineral fibers in contact with an adhesive obtained by curing an adhesive composition comprising components (i) and (iia).

[0188] In one embodiment, the present invention relates to a mineral fiber product comprising mineral fibers in contact with an adhesive, said adhesive being produced by curing an adhesive composition for mineral fibers, said adhesive composition for mineral fibers comprising:

[0189] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g, based on the dry weight of lignin sulfonate lignin.

[0190] - One or more components in the form of modifiers (iia), preferably wherein the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0191] • Epoxy compounds with a molecular weight (Mw) of 500 or less.

[0192] and / or

[0193] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0194] • Carbonyl compounds, selected from aldehydes, formula R-[C(O)R1] x carbonyl compounds,

[0195] in:

[0196] R represents a saturated or unsaturated, straight-chain, branched, or cyclic hydrocarbon group, containing one or more aromatic nuclei consisting of 5 or 6 carbon atoms, or containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and oxygen, nitrogen, or sulfur atoms. The R group may contain other functional groups.

[0197] R1 represents a hydrogen atom or C1-C. 10 Alkyl groups, and x varies between 1 and 10.

[0198] and / or

[0199] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0200] Polyamines

[0201] and / or

[0202] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0203] Monosaccharides and oligosaccharides.

[0204] The inventors have discovered that excellent binder properties can also be achieved through a two-component system comprising one or more components in the form of lignin sulfonate lignin (i) and one or more components in the form of modifiers (iia), as well as any other components optionally mentioned in the context, wherein the lignin sulfonate lignin has a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g based on the dry weight of the lignin sulfonate lignin.

[0205] In one embodiment, component (iia) is a modifier in the form of one or more compounds selected from epoxy compounds with a molecular weight greater than 500, such as epoxidized oils based on fatty acid triglycerides, or one or more flexible oligomers or polymers, such as low-Tg acrylic polymers, low-Tg vinyl polymers, low-Tg polyethers, containing reactive functional groups, such as carbodiimide groups, anhydride groups, oxazoline groups, amino groups, epoxy groups, β-hydroxyalkylamide groups.

[0206] In one embodiment, component (iia) is one or more modifiers selected from polyethyleneimine, polyethyleneamine, and fatty amines.

[0207] In one embodiment, component (iia) is one or more modifiers selected from polyfunctional carbodiimides, such as aliphatic polyfunctional carbodiimides.

[0208] Component (iia) can also be any mixture of the above compounds.

[0209] Without wishing to be bound by any particular theory, the inventors believe that the superior adhesive properties achieved by the binder composition for mineral fibers comprising components (i) and (iia) and optionally other components are at least in part due to the effect of the modifier used as component (iia) acting at least in part as a plasticizer and crosslinking agent.

[0210] In one embodiment, the adhesive composition comprises component (iia) in an amount of 1-40 wt%, such as 4-20 wt%, such as 6-12 wt%, based on the dry weight of component (i).

[0211] Other components

[0212] In some embodiments, the mineral fiber product according to the invention comprises mineral fibers in contact with an adhesive composition produced by curing an adhesive comprising other components.

[0213] In one embodiment, the adhesive composition comprises a catalyst selected from inorganic acids, such as sulfuric acid, sulfamic acid, nitric acid, boric acid, hypophosphoric acid and / or phosphoric acid, and / or any salt thereof, such as sodium hypophosphite, and / or ammonium salts, such as ammonium salts of sulfuric acid, sulfamic acid, nitric acid, boric acid, hypophosphoric acid and / or phosphoric acid, and / or sodium polyphosphate (STTP), and / or sodium metaphosphate (STMP), and / or phosphorus oxychloride. The presence of such a catalyst can improve the curing properties of the adhesive composition according to the invention.

[0214] In one embodiment, the binder composition comprises a catalyst selected from Lewis acids, which are capable of accepting electron pairs from a donor compound to form a Lewis adduct, such as ZnCl2, Mg(ClO4)2, Sn[N(SO2-n-C8F]2]3, etc. 17 )2]4.

[0215] In one embodiment, the binder composition comprises a catalyst selected from metal chlorides such as KCl, MgCl2, ZnCl2, FeCl3 and SnCl2 or adducts thereof such as AlCl3 adducts, BF3 adducts, BF3 ethylamine complexes.

[0216] In one embodiment, the binder composition comprises a catalyst selected from organometallic compounds, such as titanate-based catalysts and tin-based catalysts.

[0217] In one embodiment, the binder composition comprises a catalyst selected from chelating agents, such as transition metals, such as iron ions, chromium ions, manganese ions, copper ions, and / or peroxides, such as organic peroxides, such as dicumyl peroxide.

[0218] In one embodiment, the binder composition according to the invention comprises a catalyst selected from phosphites such as alkyl phosphites, or aryl phosphites such as triphenyl phosphites.

[0219] In one embodiment, the binder composition according to the invention comprises a catalyst selected from tertiary amines such as tris-2,4,6-dimethylaminomethylphenol.

[0220] In one embodiment, the adhesive composition further comprises one or more other components in the form of silanes (iv).

[0221] In one embodiment, the adhesive composition comprises other components (iv) in the form of one or more coupling agents, such as organofunctional silanes.

[0222] In one embodiment, component (iv) is selected from organofunctionalized silanes, such as primary or secondary aminofunctionalized silanes, epoxy-functionalized silanes, such as polymeric or oligomeric epoxy-functionalized silanes, methacrylate-functionalized silanes, alkyl and aryl-functionalized silanes, urea-functionalized silanes, or vinyl-functionalized silanes.

[0223] In one embodiment, the adhesive composition further comprises one or more component forms of a component (v) selected from alkalis, such as ammonia, alkali metal hydroxides, such as KOH, alkaline earth metal hydroxides, such as Ca(OH)2, such as Mg(OH)2, amines, or any salt thereof.

[0224] In one embodiment, the adhesive composition further comprises other components in the form of urea, particularly in amounts of 5 to 40 wt%, such as 10 to 30 wt%, 15 to 25 wt%, based on the dry weight of component (i).

[0225] In one embodiment, the binder composition further comprises one or more other components in the form of carbohydrates selected from sucrose, reducing sugars, particularly dextrose, polycarbohydrates and mixtures thereof, preferably dextrin and maltodextrin, more preferably glucose syrup, and more preferably glucose syrup with a dextrose equivalent value of DE = 30 to less than 100, for example DE = 60 to less than 100, for example DE = 60-99, for example DE = 85-99, for example glucose syrup with DE = 95-99.

[0226] In one embodiment, the binder composition further comprises other components selected from one or more carbohydrate forms of sucrose and reducing sugars, in an amount of 5-50 wt%, for example 5 wt% to less than 50 wt%, for example 10-40 wt%, for example 15-30 wt%, based on the dry weight of component (i).

[0227] In one embodiment, the mineral fiber product of the present invention comprises mineral fibers in contact with an adhesive composition, the adhesive composition comprising one or more additional components in the form of silicone resins.

[0228] In one embodiment, the adhesive composition according to the invention comprises one or more other components (vi) in the form of reactive or non-reactive silicone.

[0229] In one embodiment, component (vi) is selected from silicones with a backbone consisting of organosiloxane residues, particularly diphenylsiloxane residues, alkylsiloxane residues, preferably dimethylsiloxane residues, having at least one hydroxyl, carboxyl or anhydride, amine, epoxy or vinyl functional group capable of reacting with at least one component of the binder composition, and preferably present in an amount of 0.025-15 wt%, more preferably 0.1-10 wt%, more preferably 0.3-8 wt%, based on binder solids.

[0230] In one embodiment, the mineral fiber product of the present invention comprises mineral fibers in contact with a binder composition, the binder composition comprising one or more other components in the form of mineral oil.

[0231] In the context of this invention, a binder composition having a sugar content of 50 wt% or higher based on the total dry weight of the binder components is considered a sugar-based binder. In the context of this invention, a binder composition having a sugar content of less than 50 wt% based on the total dry weight of the binder components is considered a non-sugar-based binder.

[0232] In one embodiment, the adhesive composition further comprises other components in the form of one or more surfactants, said surfactants being in the form of nonionic and / or ionic emulsifiers, such as polyoxyethylene (4) lauryl ether, such as soybean lecithin, such as sodium dodecyl sulfate.

[0233] The use of lignin-based sulfonated products in adhesives can lead to increased hydrophilicity in some adhesives and end products, which means that one or more hydrophobic agents, such as one or more mineral oils, one or more silicone oils, or one or more silicone resins, need to be added.

[0234] In one embodiment, the aqueous adhesive composition is essentially composed of the following substances:

[0235] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin, and / or

[0236] - Components in the form of one or more crosslinking agents (ii);

[0237] - One or more components in the form of plasticizers (iii);

[0238] - One or more coupling agents, such as components in the form of organofunctional silanes (iv);

[0239] - Components in the form of one or more compounds, wherein the compounds are selected from bases, such as ammonia, alkali metal hydroxides, such as KOH, alkaline earth metal hydroxides, such as Ca(OH)2, such as Mg(OH)2, such as amines or any salt thereof;

[0240] - Optional components in urea form;

[0241] - Optional components in the form of more reactive or non-reactive silicones;

[0242] -Optional hydrocarbon oil;

[0243] -One or more surfactants may be selected;

[0244] -water,

[0245] Preferably, the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0246] - Epoxy compounds with a molecular weight (Mw) of 500 or less

[0247] and / or

[0248] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0249] -Carbonyl compounds, selected from aldehydes, formula R-[C(O)R1] x carbonyl compounds,

[0250] in:

[0251] R represents a saturated or unsaturated, straight-chain, branched, or cyclic hydrocarbon group, containing one or more aromatic nuclei consisting of 5 or 6 carbon atoms, or containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and oxygen, nitrogen, or sulfur atoms. The R group may contain other functional groups.

[0252] R1 represents a hydrogen atom or C1-C. 10 Alkyl groups, and x varies between 1 and 10.

[0253] and / or

[0254] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0255] - Polyamines

[0256] and / or

[0257] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0258] - Monosaccharides and oligosaccharides.

[0259] In one embodiment, the aqueous adhesive composition is essentially composed of the following substances:

[0260] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin, and / or

[0261] - Components in the form of one or more crosslinking agents (ii);

[0262] - One or more components in the form of plasticizers (iii);

[0263] - One or more coupling agents, such as components in the form of organofunctional silanes (iv);

[0264] - Components in the form of one or more compounds, wherein the compounds are selected from bases, such as ammonia, alkali metal hydroxides, such as KOH, alkaline earth metal hydroxides, such as Ca(OH)2, such as Mg(OH)2, amines or any salt thereof;

[0265] - Optional components in urea form;

[0266] - Optional components in the form of more reactive or non-reactive silicones;

[0267] -Optional hydrocarbon oil;

[0268] -One or more surfactants may be selected;

[0269] -water

[0270] Preferably, the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0271] - Epoxy compounds with a molecular weight (Mw) of 500 or lower

[0272] and / or

[0273] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0274] -Carbonyl compounds, selected from aldehydes, formula R-[C(O)R1] x carbonyl compounds,

[0275] in:

[0276] R represents a saturated or unsaturated, straight-chain, branched, or cyclic hydrocarbon group, containing one or more aromatic nuclei consisting of 5 or 6 carbon atoms, or containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and oxygen, nitrogen, or sulfur atoms. The R group may contain other functional groups.

[0277] R1 represents a hydrogen atom or C1-C. 10 Alkyl groups, and x varies between 1 and 10.

[0278] and / or

[0279] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0280] - Polyamines

[0281] and / or

[0282] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0283] - Monosaccharides and oligosaccharides.

[0284] In one embodiment, the aqueous adhesive composition according to the present invention is essentially composed of the following substances:

[0285] - One or more components (i) in the form of lignin sulfonate lignin, based on the dry weight of the lignin sulfonate lignin, wherein the content of carboxylic acid groups in the lignin sulfonate lignin is 0.03-1.4 mmol / g;

[0286] and / or

[0287] - Components in the form of one or more crosslinking agents (ii);

[0288] - One or more coupling agent components (iv), such as organofunctional silanes;

[0289] -Optional components selected from ammonia, amines or any salts thereof in the form of one or more compounds;

[0290] - Optional components in urea form;

[0291] - Optional components in the form of more reactive or non-reactive silicones;

[0292] -Optional hydrocarbon oil;

[0293] -Optional one or more surfactants,

[0294] Preferably, the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0295] - Epoxy compounds with a molecular weight (Mw) of 500 or lower

[0296] and / or

[0297] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0298] -Carbonyl compounds, selected from aldehydes, formula R-[C(O)R1] x carbonyl compounds,

[0299] in:

[0300] R represents a saturated or unsaturated, straight-chain, branched, or cyclic hydrocarbon group, containing one or more aromatic nuclei consisting of 5 or 6 carbon atoms, or containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and oxygen, nitrogen, or sulfur atoms. The R group may contain other functional groups.

[0301] R1 represents a hydrogen atom or C1-C. 10 Alkyl groups, and x varies between 1 and 10.

[0302] and / or

[0303] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0304] - Polyamines

[0305] and / or

[0306] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0307] - Monosaccharides and oligosaccharides.

[0308] In one embodiment, the aqueous adhesive composition according to the present invention is essentially composed of the following substances:

[0309] - One or more components (i) in the form of lignin sulfonate lignin, based on the dry weight of the lignin sulfonate lignin, wherein the content of carboxylic acid groups in the lignin sulfonate lignin is 0.03-1.4 mmol / g;

[0310] - Components in the form of one or more crosslinking agents (ii);

[0311] - One or more components in the form of coupling agents (iv), such as organofunctional silanes;

[0312] -Optional components selected from ammonia, amines or any salts thereof in the form of one or more compounds;

[0313] - Optional components in urea form;

[0314] - Optional components in the form of more reactive or non-reactive silicones;

[0315] -Optional hydrocarbon oil;

[0316] -Optional one or more surfactants,

[0317] Preferably, the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0318] - Epoxy compounds with a molecular weight (Mw) of 500 or lower

[0319] and / or

[0320] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0321] -Carbonyl compounds, selected from aldehydes, formula R-[C(O)R1] x carbonyl compounds,

[0322] in:

[0323] R represents a saturated or unsaturated, straight-chain, branched, or cyclic hydrocarbon group, containing one or more aromatic nuclei consisting of 5 or 6 carbon atoms, or containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and oxygen, nitrogen, or sulfur atoms. The R group may contain other functional groups.

[0324] R1 represents a hydrogen atom or C1-C. 10 Alkyl groups, and x varies between 1 and 10.

[0325] and / or

[0326] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0327] - Polyamines

[0328] and / or

[0329] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0330] - Monosaccharides and oligosaccharides.

[0331] The inventors have surprisingly discovered that mineral fiber products containing mineral fibers exhibit very high stability both during new production and after aging conditions, wherein the mineral fibers, in contact with the binder, cause the aqueous binder composition as described above to cure.

[0332] Furthermore, the inventors have discovered that even higher product stability can be obtained by using a curing temperature >230°C.

[0333] Therefore, in one embodiment, the present invention relates to a mineral fiber product comprising mineral fibers in contact with an adhesive, said adhesive being obtained by curing an aqueous adhesive composition as described above, wherein a curing temperature >230°C is used.

[0334] The inventors have further discovered that the stability of mineral fiber products can be further improved through the following measures:

[0335] - Lower production line capacity means longer curing time.

[0336] - Add silicone resin

[0337] - Add a large amount of crosslinking agent

[0338] - Add a combination of two or more different crosslinking agents

[0339] - Add small amounts of cationic substances such as polyvalent metal ions such as calcium and / or organic cationic substances such as amines and / or organically modified inorganic compounds such as amine-modified montmorillonite clay.

[0340] Mineral fiber products comprising mineral fibers in contact with an adhesive, said adhesive being obtained by curing an adhesive composition comprising components (i) and (iia).

[0341] In one embodiment, the present invention relates to a mineral fiber product comprising mineral fibers in contact with an adhesive, the adhesive being obtained by curing an adhesive composition for mineral fibers, the adhesive composition for mineral fibers comprising:

[0342] - One or more components (i) in the form of lignin sulfonate lignin, having a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g, based on the dry weight of lignin sulfonate lignin.

[0343] - One or more components in the form of modifiers (iia), preferably wherein the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0344] • Epoxy compounds with a molecular weight (Mw) of 500 or less.

[0345] and / or

[0346] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0347] • Carbonyl compounds, selected from aldehydes, formula R-[C(O)R1] x carbonyl compounds,

[0348] in:

[0349] R represents a saturated or unsaturated, straight-chain, branched, or cyclic hydrocarbon group, containing one or more aromatic nuclei consisting of 5 or 6 carbon atoms, or containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and oxygen, nitrogen, or sulfur atoms. The R group may contain other functional groups.

[0350] R1 represents a hydrogen atom or C1-C. 10 Alkyl groups, and x varies between 1 and 10.

[0351] and / or

[0352] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0353] Polyamines

[0354] and / or

[0355] The condition is that the aqueous adhesive composition does not contain a crosslinking agent selected from the following:

[0356] Monosaccharides and oligosaccharides

[0357] The inventors have discovered that excellent binder properties can also be achieved through a two-component system comprising one or more components in the form of lignin sulfonate lignin (i) and one or more components in the form of modifiers (iia), as well as any other components optionally mentioned in the context, wherein the lignin sulfonate lignin has a carboxylic acid group content of 0.03-2.0 mmol / g, for example 0.03-1.4 mmol / g, for example 0.075-2.0 mmol / g, for example 0.075-1.4 mmol / g based on the dry weight of the lignin sulfonate lignin.

[0358] In one embodiment, component (iia) is a modifier in the form of one or more compounds selected from epoxy compounds with a molecular weight greater than 500, such as epoxidized oils based on fatty acid triglycerides, or one or more flexible oligomers or polymers, such as low-Tg acrylic polymers, low-Tg vinyl polymers, low-Tg polyethers, containing reactive functional groups, such as carbodiimide groups, anhydride groups, oxazoline groups, amino groups, epoxy groups, β-hydroxyalkylamide groups.

[0359] In one embodiment, component (iia) is one or more modifiers selected from polyethyleneimine, polyethyleneamine, and fatty amines.

[0360] In one embodiment, component (iia) is one or more modifiers selected from polyfunctional carbodiimides, such as aliphatic polyfunctional carbodiimides.

[0361] Component (iia) can also be any mixture of the above compounds.

[0362] Without wishing to be bound by any particular theory, the inventors believe that the superior adhesive properties achieved by the binder composition for mineral fibers comprising components (i) and (iia) and optionally other components are at least in part due to the effect of the modifier used as component (iia) acting at least in part as a plasticizer and crosslinking agent.

[0363] In one embodiment, the adhesive composition contains 1-40 wt%, for example 4-20 wt%, for example 6-12 wt% of component (iia), based on the dry weight of component (i).

[0364] Methods for producing mineral fiber products

[0365] The mineral fiber products of the present invention can be prepared by bonding mineral fibers with an adhesive composition using conventional methods for producing mineral fiber products. Therefore, the mineral fiber products of the present invention are preferably prepared by a method comprising the following steps: contacting the mineral fibers with an uncured, preferably aqueous, adhesive composition comprising one or more lignin sulfonate lignin.

[0366] Preferably, the lignin sulfonate lignin has a carboxylic acid group content of 0.03-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0367] In particular, the present invention also relates to a method for manufacturing a mineral fiber product comprising mineral fibers bonded by a cured binder composition, wherein the uncured binder composition comprises one or more lignin sulfonate lignins, wherein the mineral fiber product optionally has a water-leached chloride content of less than 10 mg / kg according to EN 13468:2001, the method comprising the following steps:

[0368] a) Provides an uncured aqueous binder composition comprising one or more lignin sulfonate lignins and water,

[0369] b) Contact the mineral fibers with the uncured aqueous binder composition, and

[0370] c) Curing of adhesive compositions in contact with mineral fibers.

[0371] The uncured water-based adhesive composition contains at least some or all of the water, which is added non-purified water, preferably selected from tap water, rainwater, process water, or a combination thereof.

[0372] Preferably, the lignin sulfonate lignin has a carboxylic acid group content of 0.03-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0373] In a preferred embodiment of the method of the present invention, the proportion of unpurified water added is 30-100 wt%, more preferably 50-100 wt%, based on the total weight of water contained in the uncured adhesive composition.

[0374] In another preferred embodiment of the method of the present invention, the water content in the uncured aqueous adhesive composition is 40-90 wt%, preferably 60-85 wt%, based on the total weight of the uncured aqueous adhesive composition.

[0375] Mineral fiber products obtained by the method according to the invention may have all the features described herein with respect to the mineral fiber products of the invention, and are thus referenced.

[0376] In a preferred embodiment, the uncured aqueous adhesive composition comprises:

[0377] - One or more lignin sulfonate lignin components (i);

[0378] - Components in the form of one or more crosslinking agents (ii);

[0379] - Components in one or more optional plasticizer forms (iii).

[0380] Preferably, the lignin sulfonate lignin has a carboxylic acid group content of 0.03-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0381] As described above, in a preferred embodiment, the uncured adhesive composition used is prepared by adding non-purified water to dilute the concentrated form of the adhesive composition.

[0382] Curing

[0383] In this process, the mineral fiber product precursor, such as the uncured binder composition in the mesh, which is in contact with the binder composition, is cured through chemical and / or physical reactions of the binder components.

[0384] In one implementation, curing takes place in a curing apparatus.

[0385] In one embodiment, curing is carried out at a temperature of 100-300°C, for example 170-270°C, for example 180-250°C, for example 190-230°C.

[0386] In one embodiment, curing is carried out in a conventional curing oven used for mineral wool production, the curing oven operating at temperatures of 150 to 300°C, for example 170 to 270°C, for example 180 to 250°C, for example 190 to 230°C.

[0387] In one implementation, curing takes 30 seconds to 20 minutes, for example 1 to 15 minutes, or for example 2 to 10 minutes.

[0388] In a typical implementation, curing is carried out at a temperature of 150-250°C for 30 seconds to 20 minutes.

[0389] The curing process can begin immediately after the adhesive is applied to the fibers. Curing is defined as a process in which the adhesive composition undergoes physical and / or chemical reactions, typically increasing the molecular weight of the compounds in the adhesive composition in the case of chemical reactions, thereby increasing the viscosity of the adhesive composition, usually until the adhesive composition reaches a solid state.

[0390] In one embodiment, the curing process includes pressure drying. Pressure can be applied by blowing air or gas over the mixture of mineral fibers and binder.

[0391] The mineral fiber product of the present invention

[0392] The present invention relates to mineral fiber products comprising mineral fibers in contact with the above-described cured adhesive composition, i.e., mineral fibers in contact with a cured adhesive obtained by curing the above-described adhesive composition, preferably an aqueous adhesive composition.

[0393] The mineral fibers used can be any of the following: man-made glass fiber (MMVF), glass fiber, ceramic fiber, basalt fiber, slag fiber, rock fiber, stone fiber, etc. These fibers can exist as mineral wool products, such as asbestos products.

[0394] Fiber / melt composition

[0395] Man-made glass fiber (MMVF) can have any suitable oxide composition. The fiber can be glass fiber, ceramic fiber, basalt fiber, slag fiber, or rock or stone fiber. The fiber is preferably of the type commonly referred to as rock fiber, stone fiber, or slag fiber, with stone fiber being the most preferred.

[0396] Stone fibers typically contain the following oxides, by weight percentage:

[0397]

[0398]

[0399] In a preferred embodiment, the MMVF has the following elemental levels calculated in wt% of oxides:

[0400] SiO2: at least 30, 32, 35 or 37; not exceeding 51, 48, 45 or 43

[0401] Al2O3: at least 12, 16, or 17; not exceeding 30, 27, or 25

[0402] CaO: at least 8 or 10; not exceeding 30, 25 or 20

[0403] MgO: at least 2 or 5; not more than 25, 20 or 15

[0404] FeO (including at least 4 or 5; not exceeding 15, 12 or 10)

[0405] Fe2O3):

[0406] FeO+MgO: at least 10, 12 or 15; not exceeding 30, 25 or 20

[0407] Na₂O + K₂O: 0 or at least 1; not exceeding 10

[0408] CaO + MgO: at least 10 or 15; not exceeding 30 or 25

[0409] TiO2: 0 or at least 1; not exceeding 6, 4 or 2

[0410] TiO2+FeO: at least 4 or 6; not exceeding 18 or 12

[0411] B2O3: 0 or at least 1; not exceeding 5 or 3

[0412] P2O5: 0 or at least 1; not exceeding 8 or 5

[0413] Other: 0 or at least 1; not exceeding 8 or 5

[0414] The MMVF prepared by the method of the present invention preferably has the following composition in wt%:

[0415]

[0416]

[0417] Another preferred composition of MMVF is as follows, in wt%:

[0418]

[0419] Glass fibers typically contain the following oxides, in weight percentage:

[0420]

[0421] Glass fibers may also contain the following oxides, by weight percentage:

[0422] Na₂O + K₂O: 8-18, especially Na₂O + K₂O is greater than CaO + MgO; B₂O₃: 3-12.

[0423] Some glass fiber compositions may contain less than 2% Al2O3.

[0424] In a preferred embodiment, the mineral fibers are hydrophobically treated mineral fibers, preferably hydrophobically treated asbestos. Hydrophobic treatment is a common process and can be achieved, for example, by adding at least one hydrophobic agent, such as mineral oil, siloxane, or reactive or non-reactive silicone, during the mineral fiber manufacturing process to form a hydrophobic film around the fibers. Therefore, the hydrophobically treated mineral fibers preferably have a hydrophobic film on their surface.

[0425] Suitable fiber-forming methods and subsequent production steps for manufacturing mineral fiber products are those conventional in the art. Typically, the binder is sprayed onto the air-carried mineral fibers immediately after the mineral melt fibrillation. Uncured, preferably aqueous, binder compositions are typically applied on a dry basis at an amount of 0.1-18 wt%, preferably 0.2-8 wt%, of the bonded mineral fiber product.

[0426] The sprayed mineral fiber mesh is typically cured in a curing oven by a stream of hot air. The hot air stream can be introduced into the mineral fiber mesh from below or above, or from alternating directions, in different areas along the length of the curing oven.

[0427] Typically, curing ovens operate at temperatures ranging from approximately 150°C to approximately 300°C, such as 170 to 270°C, 180 to 250°C, or 190 to 230°C. The typical curing oven dwell time is 30 seconds to 20 minutes, such as 1 to 15 minutes, or 2 to 10 minutes, depending on factors such as product density.

[0428] In a typical implementation, the mineral fiber product according to the invention is cured at a temperature of 150°C to 250°C for 30 seconds to 20 minutes.

[0429] If necessary, the mineral fiber web can be shaped before curing. The bonded mineral fiber product exiting the curing oven can be cut into the desired format, such as wadding.

[0430] In a preferred embodiment, the mineral fiber product according to the invention is a thermal insulation product and / or a sound insulation product, preferably a thermal insulation product.

[0431] Mineral fiber products can be in the form of preformed tubular sections, line pads, or sheets.

[0432] The preformed tube section can be in the form of a hollow cylinder or a portion thereof. The dimensions of the preformed tube section should be suitable for the tube to be insulated. The wire pad is a lightly bonded mineral fiber pad sewn onto a galvanized wire mesh with galvanized wire.

[0433] In a preferred embodiment, the mineral fiber product according to the invention is used for pipes, storage tanks, boilers, containers or towers, preferably for pipe insulation and / or sound insulation.

[0434] In a preferred embodiment, the thickness of the mineral fiber product according to the invention is 20 mm to 500 mm or 25 mm to 300 mm, preferably 30 mm to 300 mm, for example 50 mm to 150 mm, wherein the mineral fiber product is typically in sheet form.

[0435] The mineral fiber products according to the present invention typically have a density of 6 to 250 kg / m³. 3 Preferred weight is 20 to 200 kg / m³ 3 Within the specified range, the loss on ignition (LOI) of the mineral fiber product is 0.3% to 18.0%, preferably 0.5% to 8.0%.

[0436] Uses of the mineral fiber products described in this invention

[0437] The uses of the mineral fiber products described in this invention relate to their use as thermal and / or sound insulation materials, particularly as non-corrosive thermal and / or sound insulation materials.

[0438] The term "non-corrosive" here means that the insulation and / or sound insulation materials do not contribute to increased corrosion. "Non-corrosive" does not mean that corrosion can not occur, but rather that it is caused by factors other than the insulation and / or sound insulation materials themselves.

[0439] Therefore, the present invention also relates to the use of mineral fiber products as thermal and / or sound insulation materials, particularly as non-corrosive thermal and / or sound insulation materials, the mineral fiber products comprising mineral fibers bonded by a cured binder composition, the uncured binder composition comprising one or more lignin sulfonate lignin. Generally, it is preferred that the mineral fiber products, according to EN 13468:2001, have a water leaching chloride content of less than 10 mg / kg.

[0440] Preferably, the lignin sulfonate lignin has a carboxylic acid group content of 0.03-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0441] In a preferred embodiment of the invention, the mineral fiber product is used as a thermal and / or sound insulation material, particularly a non-corrosive thermal and / or sound insulation material, for objects selected from pipes, tanks, boilers, containers, or towers, preferably pipes. The pipe or pipe assembly also includes an exhaust pipe.

[0442] In a preferred embodiment of the invention, the mineral fiber product is used as a thermal and / or sound insulation material for an object made of metal, wherein the object is typically a hollow object, examples of which are given above. The metal is preferably selected from copper or steel, with steel being preferred. The steel is preferably carbon steel, stainless steel, austenitic stainless steel, non-alloy steel, or low-alloy steel. In a particularly preferred embodiment, the object is a steel pipe.

[0443] In a preferred embodiment of the use according to the invention, the use is preferably at a temperature of -20°C to 320°C, more preferably 0°C to 200°C, for example, 50°C to 175°C. Temperature refers to the temperature of the object isolated by the mineral fiber product, i.e., the operating temperature. Operation can be continuous or cyclic, relative to temperature. In the case of cyclic operation, the above temperature range generally refers to the highest operating temperature.

[0444] Objects covered by mineral fiber products as insulation and / or sound insulation, particularly non-corrosive insulation and / or sound insulation, typically include media selected from gases, vapors, or fluids. Mineral fiber products used according to the invention may have all the features already described above with respect to the mineral fiber products of the invention for reference thereto.

[0445] Hollow objects having the heat insulation and / or sound insulation components described in this invention

[0446] The present invention also relates to hollow objects covered with mineral fiber products as thermal and / or sound insulation, wherein the mineral fiber products comprise mineral fibers bonded by a cured adhesive composition, and the uncured adhesive composition comprises one or more lignin sulfonate lignins.

[0447] Preferably, the lignin sulfonate lignin has a carboxylic acid group content of 0.03-1.4 mmol / g, based on the dry weight of the lignin sulfonate lignin.

[0448] Preferred mineral fiber products, according to EN 13468:2001, have a water leaching chloride content of less than 10 mg / kg.

[0449] In a preferred embodiment, the hollow object is selected from pipes, storage tanks, boilers, containers, or towers, preferably pipes. The pipe or pipe component further includes an exhaust pipe.

[0450] In a preferred embodiment, the hollow object is made of metal. The metal is preferably selected from copper or steel, with steel being preferred. The steel is preferably carbon steel, stainless steel, austenitic stainless steel, non-alloy steel, or low-alloy steel. In a particularly preferred embodiment, the object is a steel pipe.

[0451] The mineral fiber product for covering hollow objects according to the present invention may have all the features already described above for the mineral fiber product of the present invention, and thus referenced herein.

[0452] Example

[0453] In the following embodiments, several adhesives falling within the definition of this invention are prepared and compared with adhesives of the prior art.

[0454] Lignosulfonates were supplied by Borregaard, Norway, and Lignotech, Florida, as liquids with a solids content of approximately 50%. Primid XL552 was supplied by EMS-CHEMIE AG. PEG 200 was supplied by Sigma-Aldrich, assumed to be anhydrous for simplicity, and used as is. Silane (Momentive VS-142 40% active) was supplied by Momentive and calculated at 100% for simplicity. Silicone BS 1052 was supplied by Wacker Chemie AG. NH4OH 24.7% was supplied by Univar and used as provided.

[0455] The following properties of the adhesive according to the present invention and the adhesive according to the prior art were determined respectively:

[0456] Determination of water-leached chloride content in mineral fiber products

[0457] The water-leached chloride content of mineral fiber products is measured according to EN 13468:2001. This standard specifies the equipment and procedures for determining trace amounts of water-soluble chloride in the aqueous extracts of the products. It is referenced herein. The water-leached chloride content is given in mg chloride / kg mineral fiber product.

[0458] Determination of Loss on Ignition (LOI) of Mineral Fiber Products

[0459] The amount of organic material (loss on ignition) is determined as the weight loss of the specimen obtained by burning off the organic material. This is done in accordance with EN 13820. The binder content is given as LOI. The binder includes oil and other binder additives (if present).

[0460] Determination of dry solids in binders

[0461] The amount of adhesive after curing is called "adhesive solids".

[0462] A disc-shaped asbestos sample (5 cm in diameter; 1 cm in height) was cut from the asbestos and heat-treated at 580°C for at least 30 minutes to remove all organic matter. The solids of the binder mixture were measured by distributing a sample (approximately 2 g) of the binder mixture onto the heat-treated asbestos disc in a foil container. The foil container containing the asbestos disc was weighed immediately before and after the addition of the binder mixture. Two such binder mixture-loaded asbestos discs were prepared in the foil container and then heated at 200°C for 1 hour. After cooling and storing at room temperature for 10 minutes, the sample was weighed and the binder solids were calculated as the average of the two results.

[0463] Unless otherwise specified, the following reagents shall be used as is:

[0464] PEG 200: Supplied by Sigma-Aldrich, assumed to be anhydrous for simplicity and used as is.

[0465] Primid XL552: Hydroxyalkylamide crosslinking agent, supplied by EMS-CHEMIE AG

[0466] Adhesive Examples, Reference Adhesive A3 (phenol-formaldehyde resin modified with urea and dextrose, PUF-formaldehyde resin)

[0467] The adhesive is made of urea-modified phenol-formaldehyde resin and PUF-formaldehyde resin.

[0468] Phenol-formaldehyde resin was prepared by heating at a rate of approximately 1 °C / min in a 46% potassium hydroxide aqueous solution (25.5 g), followed by reaction of 37% formaldehyde aqueous solution (606 g) and phenol (189 g) at a reaction temperature of 84 °C. The reaction was continued at 84 °C until the resin's acid resistance reached 4 and most of the phenol was converted. Urea (241 g) was then added, and the mixture was cooled.

[0469] Acid resistance (AT) indicates the number of times a given volume of binder can be diluted with acid without the mixture becoming cloudy (binder precipitation). Sulfuric acid is used to determine the stopping criterion in binder production, and an acid resistance below 4 indicates that the binder reaction has ended.

[0470] To measure AT, a titrant was prepared by diluting 2.5 ml of concentrated sulfuric acid (>99%) with 1 L of deionized water. Then, 5 mL of the adhesive under study was titrated with this titrant at room temperature while keeping the adhesive in motion by hand shaking; preferably, a magnetic stirrer and magnetic rod were used. Titration continued until a slight cloud-like substance appeared in the adhesive that did not disappear when the adhesive was shaken.

[0471] Acid resistance (AT) is calculated by dividing the amount of acid (mL) used for titration by the amount of sample (mL):

[0472] AT = (Titration volume used (mL)) / (Sample volume (mL))

[0473] The obtained urea-modified phenolic resin was used to prepare an adhesive by adding 25% ammonia (90 mL) and ammonium sulfate (13.2 g), followed by water (1300 g).

[0474] Based on the dry matter of the binder and dextrose described above, 18% dextrose (127.5g) was added to the mixture. The binder solids were then measured as described above, and the mixture was diluted with the required amount of water and silane (15% binder solids solution, 0.5% silane of binder solids) to produce the barrier product.

[0475] The dilution water used for reference binder A3 is process water.

[0476] Adhesive Examples A1 and A2:

[0477] Prepared as described in Example A3, but without the addition of dextrose. Process water was used for binder Example A1, and permeation water was used for A2.

[0478] Adhesive Examples, Reference Adhesives B1 and B2

[0479] A mixture of 75.1% glucose syrup aqueous solution (19.98 kg, therefore effectively 15.0 kg glucose syrup), 50% hypophosphoric acid aqueous solution (0.60 kg, therefore effectively 0.30 kg, 4.55 mol hypophosphoric acid) and aminosulfonic acid (0.45 kg, 4.63 mol) in water (30.0 kg) was stirred at room temperature until a clear solution was obtained, and then 28% ammonia water (0.80 kg, therefore effectively 0.22 kg, 13.15 mol ammonia) was added dropwise until pH = 7.9.

[0480] The binder solids were then measured (21.2%). For mechanical strength studies (15% binder solids solution, 0.5% silane in binder solids), the binder mixture was diluted with water (0.403 kg / kg binder mixture) and a 10% silane aqueous solution (0.011 kg / kg binder mixture, Momentive VS-142). The final binder mixture had a pH of 7.9 and was used to produce the insulating product.

[0481] Adhesive B1 uses rainwater, while adhesive B2 uses process water.

[0482] Examples 1, 2 and 3 - Mineral wool products of the present invention:

[0483] The asbestos products of Examples 1, 2, and 3 were produced using the following binder:

[0484] Example 1

[0485] 1163.0 kg of ammonium lignosulfonate was placed in a mixing container, and 14 liters of NH4OH (24.7%) were added and stirred. Then, 240 kg of Primid XL552 solution (prepared 31 wt% aqueous solution) and 68 kg of PEG 200 (100% solids) were added and mixed, followed by 21 kg of silane (Momentive VS-142 40% active, 10% aqueous solution).

[0486] Example 2

[0487] 1910.0 kg of ammonium lignosulfonate was placed in a mixing container, and 22 L of NH4OH (24.7%) was added and stirred. Then, 395 kg of Primid XL552 solution (prepared 31 wt% aqueous solution) and 112 kg of PEG 200 (100% solids) were added and mixed, followed by the addition of 34 kg of silane (Momentive VS-142 40% active, 10% aqueous solution).

[0488] Example 3

[0489] 1395.0 kg of ammonium lignosulfonate was placed in a mixing container, and 16 liters of NH4OH (24.7%) were added and stirred. Then, 289 kg of Primid XL552 solution (prepared 31 wt% aqueous solution) and 82 kg of PEG 200 (100% solids) were added and mixed. Then, 25 kg of silane (Momentive VS-142 40% active, 10% aqueous solution) and 76 kg of silicone (Wacker BS 1052, 12% aqueous solution) were added.

[0490] The binders shown in Table 1 were used to prepare the asbestos products described in Examples 1, 2, and 3. The curing oven temperature was set to 255°C for Examples 1 and 2, and to 275°C for Example 3.

[0491] Asbestos products containing reference binders A1 to A3, reference binders B1 and B2, and binders of Examples 1 to 3 (products of this invention) were prepared in a standard asbestos plant using the water types specified in Table 1.

[0492] The dry solids content, loss on ignition, chloride content, and pH value of the binder in the asbestos products were tested using the methods described above. The results are also shown in Table 1.

[0493] Table 1

[0494]

Claims

1. A mineral fiber product comprising mineral fibers bonded by a cured binder composition, wherein the uncured binder composition comprises - One or more components (i) in the form of lignin sulfonate lignin, wherein the lignin sulfonate lignin has a carboxylic acid group content of 0.03 mmol / g to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignin, and a phenol OH group content of 0.3-2.5 mmol / g based on the dry weight of the lignin sulfonate lignin. The mineral fiber product, according to EN 13468:2001, has a water leaching chloride content of less than 10 mg / kg. The uncured adhesive composition is an aqueous adhesive composition, wherein at least part or all of the water contained in the aqueous adhesive composition is unpurified water with a chloride content of at least 10 mg / L. Considering the average weight of Mn in component (i), the average content of carboxylic acid groups in component (i) is less than 1.4 groups / macromolecule.

2. The mineral fiber product according to claim 1, wherein the mineral fiber product is leached in water according to EN 13468:2001 with a chloride content of less than 6 mg / kg.

3. The mineral fiber product according to claim 1, wherein it is a heat insulation product and / or a sound insulation product.

4. The mineral fiber product according to claim 1, wherein the mineral fiber product is a thermal insulation and / or sound insulation material for containers or towers, and / or The mineral fiber product is in the form of preformed tubular sections, pads, or sheets, and / or The thickness of the mineral fiber product ranges from 20mm to 500mm.

5. The mineral fiber product according to claim 4, wherein the tower is a tube.

6. The mineral fiber product according to claim 4, wherein the container is a storage tank or a boiler.

7. The mineral fiber product according to claim 4, wherein the thickness of the mineral fiber product is 30 mm to 300 mm.

8. The mineral fiber product according to claim 4, wherein the thickness of the mineral fiber product is 50 mm to 150 mm.

9. The mineral fiber product according to claim 1, wherein the non-purified water is selected from tap water, rainwater, process water, or a combination thereof.

10. The mineral fiber product of claim 1, wherein the uncured binder composition comprises: - One or more components (i) in the form of lignin sulfonate lignin, wherein the lignin sulfonate lignin has a carboxylic acid group content of 0.03 to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignin, a phenolic OH group content of 0.3 to 2.5 mmol / g based on the dry weight of the lignin sulfonate lignin, and wherein, taking into account the average weight of Mn of component (i), the average carboxylic acid group content of component (i) is less than 1.4 groups / macromolecule; and - Components in the form of one or more cross-linking agents (ii).

11. The mineral fiber product of claim 10, wherein the uncured binder composition further comprises one or more components in the form of plasticizers (iii).

12. The mineral fiber product according to claim 1, wherein component (i) has a carboxylic acid group content of 0.05 to 0.6 mmol / g, based on the dry weight of lignin sulfonate lignin.

13. The mineral fiber product according to claim 1, wherein component (i) is in the form of one or more lignin sulfonate lignins, and the average carboxylic acid group content of the lignin sulfonate lignin is less than 1.1 groups / macromolecule, taking into account the average weight of Mn of component (i).

14. The mineral fiber product according to claim 13, wherein, taking into account the average weight of Mn in component (i), the average content of carboxylic acid groups in component (i) is less than 0.7 groups / macromolecule.

15. The mineral fiber product according to claim 13, wherein, taking into account the average weight of Mn in component (i), the average content of carboxylic acid groups in component (i) is less than 0.4 groups / macromolecule.

16. The mineral fiber product according to claim 1, wherein the phenolic OH group content of component (i) is 0.5-2.0 mmol / g, based on the dry weight of lignin sulfonate lignin.

17. The mineral fiber product according to claim 16, wherein the phenolic OH group content of component (i) is 0.5-1.5 mmol / g, based on the dry weight of lignin sulfonate lignin.

18. The mineral fiber product according to claim 1, wherein the aliphatic OH group content of component (i) is 1.0 to 8.0 mmol / g, based on the dry weight of lignin sulfonate lignin.

19. The mineral fiber product according to claim 18, wherein the aliphatic OH group content of component (i) is 1.5 to 6.0 mmol / g, based on the dry weight of lignin sulfonate lignin.

20. The mineral fiber product according to claim 18, wherein the aliphatic OH group content of component (i) is 2.0 to 5.0 mmol / g, based on the dry weight of lignin sulfonate lignin.

21. The mineral fiber product according to claim 1, wherein component (i) comprises ammonium lignosulfonate and / or calcium lignosulfonate and / or magnesium lignosulfonate and any combination thereof.

22. The mineral fiber product according to claim 1, wherein component (i) comprises ammonium lignosulfonate and calcium lignosulfonate, wherein NH4 + With Ca 2+ The molar ratio is 5:1 to 1:

5.

23. The mineral fiber product according to claim 22, wherein NH4 + With Ca 2+ The molar ratio is 3:1-1:

3.

24. The mineral fiber product of claim 1, wherein the aqueous binder composition contains 0 wt% to less than 5 wt% of added sugar, based on the weight of lignin sulfonate and sugar.

25. The mineral fiber product of claim 10, wherein the binder composition comprises 50-98 wt% of component (i) based on the dry weight of components (i) and (ii).

26. The mineral fiber product of claim 25, wherein the binder composition comprises 65-98 wt% of component (i) based on the dry weight of components (i) and (ii).

27. The mineral fiber product of claim 25, wherein the binder composition comprises 80-98 wt% of component (i) based on the dry weight of components (i) and (ii).

28. The mineral fiber product of claim 10, wherein the binder composition comprises 50 to 88 wt% of component (i) based on the dry weight of components (i) and (ii).

29. The mineral fiber product of claim 28, wherein the binder composition comprises 50 to 87 wt% of component (i) based on the dry weight of components (i) and (ii).

30. The mineral fiber product of claim 28, wherein the binder composition comprises 65 to 88 wt% of component (i) based on the dry weight of components (i) and (ii).

31. The mineral fiber product of claim 28, wherein the binder composition comprises 65 to 87 wt% of component (i) based on the dry weight of components (i) and (ii).

32. The mineral fiber product of claim 28, wherein the binder composition comprises 80 to 88 wt% of component (i) based on the dry weight of components (i) and (ii).

33. The mineral fiber product of claim 28, wherein the binder composition comprises 80 to 87 wt% of component (i) based on the dry weight of components (i) and (ii).

34. The mineral fiber product according to claim 10, wherein component (ii) is in the form of one or more crosslinking agents selected from... a) -Hydroxyalkylamide crosslinking agent and / or oxazoline crosslinking agent, and / or b) Polyfunctional organic amines, diamines, triamines, and / or c) Epoxy compounds with a molecular weight greater than 500, and / or d) One or more crosslinking agents selected from polyethyleneimine, polyethyleneamine, fatty amines; and / or e) One or more crosslinking agents in the form of fatty amides; and / or f) one or more crosslinking agents selected from polyester polyols; and / or g) One or more crosslinking agents selected from starch, modified starch, and CMC; and / or h) One or more crosslinking agents in the form of aliphatic multifunctional carbodiimides; and / or i) One or more crosslinking agents selected from melamine-based crosslinking agents.

35. The mineral fiber product according to claim 34, wherein... - Multifunctional organic amines include alkanolamines, and / or - Diamines include hexamethyldiamine, and / or - Epoxy compounds with a molecular weight greater than 500 include epoxidized oils based on fatty acid triglycerides or one or more flexible oligomers or flexible polymers containing reactive functional groups, and / or - Polyols include polycaprolactone; and / or - Melamine-based crosslinking agents include those based on hexa(methylmethoxy)melamine (HMMM).

36. The mineral fiber product according to claim 35, wherein the reactive functional group is selected from carbodiimide groups, acid anhydride groups, oxazoline groups, amino groups, and epoxy groups.

37. The mineral fiber product of claim 34, wherein component (ii) comprises a group selected from... One or more crosslinking agents, including hydroxyalkylamide crosslinking agents and / or oxazoline crosslinking agents.

38. The mineral fiber product according to claim 10, comprising 1 to 50 wt% of component (ii) based on the dry weight of component (i).

39. The mineral fiber product according to claim 38, comprising 4 to 20 wt% of component (ii) based on the dry weight of component (i).

40. The mineral fiber product according to claim 38, comprising 6 to 12 wt% of component (ii) based on the dry weight of component (i).

41. The mineral fiber product according to any one of the preceding claims, wherein component (ii) comprises one or more crosslinking agents selected from: - - Hydroxyalkylamide crosslinking agent.

42. The mineral fiber product according to claim 41, wherein... -Hydroxyalkylamide crosslinking agents are selected from N-(2-hydroxyisopropyl)amide crosslinking agents, N-(2-hydroxyethyl)amide crosslinking agents, and N-(2-hydroxyethyl)hexamethylenediamide crosslinking agents.

43. The mineral fiber product according to claim 42, wherein the N-(2-hydroxyethyl)hexamethylenediamide crosslinking agent comprises N,N,N N -Tetra(2-hydroxyethyl)hexamethylenediamide.

44. The mineral fiber product according to claim 10, comprising 2 to 90 wt% of component (ii) based on the dry weight of component (i).

45. The mineral fiber product according to claim 44, comprising 6 to 60 wt% of component (ii) based on the dry weight of component (i).

46. ​​The mineral fiber product according to claim 44, comprising 10 to 40 wt% of component (ii) based on the dry weight of component (i).

47. The mineral fiber product according to claim 44, comprising 25 to 40 wt% of component (ii) based on the dry weight of component (i).

48. The mineral fiber product according to claim 11, wherein component (iii) is included in the uncured binder composition in the form of a plasticizer, said plasticizer being selected from: - One or more plasticizers selected from fatty alcohols, monohydroxy alcohols; and / or - One or more plasticizers selected from alkoxylates; and / or - One or more plasticizers in the form of propylene glycol; and / or - One or more plasticizers in the form of ethylene glycol esters; and / or - One or more plasticizers, selected from benzoic acid esters, acetates, benzoates, cyclobenzoates, citrates, stearates, sorbates, sebates, azelaic acid esters, butyrates, valerates; and / or - One or more plasticizers selected from phenol derivatives; and / or - One or more plasticizers selected from silanols and siloxanes; and / or - One or more plasticizers selected from sulfate esters, sulfonates, phosphate esters; and / or - Plasticizers in the form of one or more hydroxy acids; and / or - One or more plasticizers selected from monomeric amides, benzamides, fatty acid amides; and / or - One or more plasticizers selected from quaternary ammonium compounds; and / or - One or more plasticizers selected from vegetable oils; and / or - Tall oil, and / or - One or more plasticizers selected from hydrogenated oils, acetylated oils; and / or - One or more plasticizers selected from methyl esters; and / or - One or more plasticizers selected from alkyl polyglucosides, glucosamides, aminoglucosamides, sucrose esters, and dehydrated sorbitol esters; and / or - One or more plasticizers selected from polyethylene glycol, polyethylene glycol ether; and / or - Plasticizers in the form of one or more polyols; and / or - Triethanolamine.

49. The mineral fiber product according to claim 48, wherein: - The monohydroxy alcohol is selected from pentanol, stearyl alcohol; and / or - The alkoxylate is selected from ethoxylates, butanol ethoxylates, and butoxytriethylene glycol; and / or - Phenolic derivatives are selected from alkyl- or aryl-substituted phenols; and / or - Sulfate esters are alkyl sulfate esters; and / or - Sulfonates are selected from alkyl aryl sulfonates; and / or -The phosphate ester is a triphosphate ester; and / or -The monomeric amide is acetamide; and / or - Fatty acid amides are talloyl amides; and / or - The quaternary ammonium compound is selected from trimethylglycine and distearate dimethylammonium chloride; and / or - Vegetable oils are selected from castor oil, palm oil, flaxseed oil, and soybean oil; and / or - The polyols are selected from glycerol and 1,1,1-tris(hydroxymethyl)propane.

50. The mineral fiber product according to claim 11, wherein component (iii) is in the form of propylene glycol, phenolic derivatives, silanols, siloxanes, hydroxy acids, vegetable oils, polyethylene glycol, polyethylene glycol ethers, triethanolamine, or any mixture thereof.

51. The mineral fiber product according to claim 11, wherein component (iii) comprises one or more plasticizers having a boiling point of 100 to 380°C.

52. The mineral fiber product according to claim 51, wherein component (iii) comprises one or more plasticizers having a boiling point of 120 to 300°C.

53. The mineral fiber product according to claim 51, wherein component (iii) comprises one or more plasticizers having a boiling point of 140 to 250°C.

54. The mineral fiber product according to claim 10, wherein component (iii) comprises one or more polyethylene glycols having an average molecular weight of 150 to 50,000 g / mol.

55. The mineral fiber product according to claim 54, wherein the average molecular weight of polyethylene glycol is from 150 to 4000 g / mol.

56. The mineral fiber product according to claim 54, wherein the average molecular weight of polyethylene glycol is 150 to 1000 g / mol.

57. The mineral fiber product according to claim 54, wherein the average molecular weight of polyethylene glycol is 150 to 500 g / mol.

58. The mineral fiber product according to claim 54, wherein the average molecular weight of polyethylene glycol is 200 to 400 g / mol.

59. The mineral fiber product according to claim 11, wherein component (iii) is present in an amount of 0.5 wt% to 60 wt% based on the dry weight of component (i).

60. The mineral fiber product according to claim 59, wherein component (iii) is present in an amount of 2.5 wt% to 25 wt% based on the dry weight of component (i).

61. The mineral fiber product according to claim 59, wherein component (iii) is present in an amount of 3 wt% to 15 wt% based on the dry weight of component (i).

62. The mineral fiber product according to claim 1, comprising other components in the form of one or more coupling agents (iv).

63. The mineral fiber product according to claim 62, wherein one or more coupling agents are organofunctional silanes.

64. The mineral fiber product according to claim 1 further comprises one or more components (v) selected from ammonia, alkali metal hydroxides, alkaline earth metal hydroxides, amines or any salts thereof.

65. The mineral fiber product according to claim 64, wherein: - The alkali metal hydroxide is KOH; and / or -Alkaline earth metal hydroxides are selected from Ca(OH)2 and Mg(OH)2.

66. The mineral fiber product according to claim 1, wherein it comprises other components in the form of urea.

67. The mineral fiber product according to claim 66, wherein the amount of urea is 5 to 40 wt%, based on the dry weight of component (i).

68. The mineral fiber product according to claim 66, wherein the amount of urea is 10 to 30 wt%, based on the dry weight of component (i).

69. The mineral fiber product according to claim 66, wherein the amount of urea is 15 to 25 wt%, based on the dry weight of component (i).

70. The mineral fiber product of claim 1, comprising one or more other components in the form of reactive or non-reactive silicone (vi).

71. Use of a mineral fiber product as a thermal and / or sound insulation material, the mineral fiber product comprising mineral fibers bonded by a cured binder composition, the uncured binder composition comprising one or more lignin sulfonate lignins having a carboxylic acid group content of 0.03 to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignin, taking into account the average weight of Mn in the lignin sulfonate lignin, an average carboxylic acid group content of less than 1.4 groups / macromolecule, and a phenolic OH group content of 0.3-2.5 mmol / g based on the dry weight of the lignin sulfonate lignin, wherein the mineral fiber product has a water-leached chloride content of less than 10 mg / kg according to EN 13468:2001. The uncured adhesive composition is an aqueous adhesive composition, wherein at least part or all of the water contained in the aqueous adhesive composition is unpurified water with a chloride content of at least 10 mg / L.

72. The use according to claim 71, wherein the mineral fiber product is used as a non-corrosive thermal insulation and / or sound insulation.

73. The use according to claim 71, wherein the mineral fiber product is used as a thermal insulation and / or sound insulation material for containers or towers.

74. The use according to claim 73, wherein the container is a storage tank or a boiler.

75. The use according to claim 74, wherein the tower is a pipe.

76. The use according to claim 71, wherein the mineral fiber product is used at temperatures ranging from -20°C to 320°C.

77. The use according to claim 76, wherein the mineral fiber product is used at temperatures ranging from 0°C to 200°C.

78. The use according to claim 76, wherein the mineral fiber product is used at a temperature in the range of 50°C to 175°C.

79. The use according to claim 78, wherein the mineral fiber product is used as a thermal insulation and / or sound insulation for objects made of metal.

80. The use according to claim 79, wherein the metal is selected from copper and steel.

81. The use according to claim 80, wherein the steel is selected from carbon steel, stainless steel, non-alloy steel or low-alloy steel.

82. The stainless steel is an austenitic stainless steel, as described in claim 81.

83. The use according to claim 71, wherein the mineral fiber product is as defined in any one of claims 1 to 70.

84. A method for manufacturing a mineral fiber product comprising mineral fibers bonded by a cured binder composition, wherein the uncured binder composition comprises one or more lignin sulfonate lignins having a carboxylic acid group content of 0.03 to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignin, taking into account the average weight of Mn in the lignin sulfonate lignin, an average carboxylic acid group content of less than 1.4 groups / macromolecule, and a phenolic OH group content of 0.3-2.5 mmol / g based on the dry weight of the lignin sulfonate lignin, wherein the mineral fiber product has a water-leached chloride content of less than 10 mg / kg according to EN 13468:2001, the method comprising the following steps: a) Provides an uncured aqueous binder composition comprising one or more lignin sulfonate lignins and water, wherein the lignin sulfonate lignins have a carboxylic acid group content of 0.03 to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignins, taking into account the average weight of Mn in the lignin sulfonate lignins, an average carboxylic acid group content of less than 1.4 groups / macromolecule, and a phenolic OH group content of 0.3-2.5 mmol / g based on the dry weight of the lignin sulfonate lignins. b) Contact the mineral fibers with the uncured aqueous binder composition, and c) A cured adhesive composition in contact with mineral fibers, wherein at least part or all of the water contained in the uncured aqueous adhesive composition is added, unpurified water. The uncured adhesive composition is an aqueous adhesive composition, wherein at least part or all of the water contained in the aqueous adhesive composition is unpurified water with a chloride content of at least 10 mg / L.

85. The method of claim 84, wherein the non-purified water is selected from tap water, rainwater, process water, or a combination thereof.

86. The method of claim 84, wherein the proportion of added non-purified water is in the range of 30 wt% to 100 wt%, based on the total weight of water contained in the uncured adhesive composition, and / or The water content in the uncured aqueous adhesive composition ranges from 40 wt% to 90 wt%, based on the total weight of the uncured aqueous adhesive composition.

87. The method of claim 86, wherein the proportion of added non-purified water is in the range of 50 wt% to 100 wt%, based on the total weight of water contained in the uncured adhesive composition.

88. The method of claim 86, wherein the water content in the uncured aqueous adhesive composition is in the range of 60 wt% to 85 wt%, based on the total weight of the uncured aqueous adhesive composition.

89. The method of claim 84, wherein the mineral fiber product is as defined in any one of claims 1 to 70.

90. A hollow object covered with a mineral fiber product as a thermal and / or sound insulation material, wherein the mineral fiber product comprises mineral fibers bonded by a cured binder composition, the uncured binder composition comprising one or more lignin sulfonate lignins having a carboxylic acid group content of 0.03 to 1.4 mmol / g based on the dry weight of the lignin sulfonate lignin, taking into account the average weight of Mn in the lignin sulfonate lignin, an average carboxylic acid group content of less than 1.4 groups / macromolecule, and a phenolic OH group content of 0.3-2.5 mmol / g based on the dry weight of the lignin sulfonate lignin, wherein the mineral fiber product has a water-leached chloride content of less than 10 mg / kg according to EN 13468:2001. The uncured adhesive composition is an aqueous adhesive composition, wherein at least part or all of the water contained in the aqueous adhesive composition is unpurified water with a chloride content of at least 10 mg / L.

91. The hollow object of claim 90, wherein the hollow object is selected from containers or towers, and / or wherein the hollow object is made of metal.

92. The hollow object according to claim 91, wherein the container is selected from storage tanks and boilers.

93. The hollow object according to claim 91, wherein the tower is a tube.

94. The hollow object according to claim 91, wherein the metal is copper or steel.

95. The hollow object according to claim 94, wherein the steel is selected from carbon steel, stainless steel, non-alloy steel and low-alloy steel.

96. The hollow object according to claim 95, wherein the stainless steel is austenitic stainless steel.

97. The hollow object according to claim 90, wherein the mineral fiber product is as defined in any one of claims 1 to 70.

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