Silicone sealant and sealant containing sealant

Description

1 SILICONE SEALANTS SEALANT PROTECTION TECHNICAL DOMAIN 5 The invention relates to the technical field of silicones, more specifically to the technical field of alkoxy-type silicones. STANDARD OF THE TECHNOLOGY 10 Silicones or alkoxy-type polysiloxanes are synthetic substances comprising repeating siloxane units in which the curing process is induced by hydrolysis and activation of alkoxy cross-linking molecules. Polysiloxanes are chains of alternating silicon and oxygen atoms, in which the silicon atoms form bonds with hydrogen atoms and / or carbon-containing side chains. Polysiloxanes possess the ability to repel water and form watertight seals. Furthermore, polysiloxanes exhibit low thermal conductivity, low chemical reactivity, and high resistance to the effects of oxygen and ultraviolet light. For this reason, silicones are often used as sealants. More specifically, sealing is achieved by a silicone sealing compound ofto apply the alkoxy type to an opening to be sealed, such as a groove, joint, slot, or leak. This composition contains an alkoxy crosslinker or is applied together with such a crosslinker. Moisture present in the air hydrolyzes reactive groups of the alkoxy crosslinker into reactive hydroxyl and / or silanol groups.25 The reactive hydroxyl and / or silanol groups further condense with hydrolyzable groups of polymers or crosslinker molecules, thereby forming a hardening network of crosslinked polymers. This process is called the curing of a silicone sealing composition.30 Silicone sealants according to the current state of the art exhibit high adhesiveness compared to polyvinyl chlorides and are low corrosive. This allows the sealants to be used on semi-sensitive materials. Nevertheless, it is known in the current state of the art that silicone sealants often contain oximes, which are unsafe and harmful to health35. There is a need in the current state of the art for improved and qualitative 2024 / 5881 BE2024 / 5881 2sealants. Furthermore, there is a high demand for sealants that are safe for the producer and the user, without compromising on their quality. A problem with known silicone sealants is the relatively large loss of volume after application and during the curing of the silicone sealant. Shrinkage of silicone during the curing process reduces and / or minimizes the sealing capacity of silicone. An additional problem is that, according to the current state of the art, silicones exhibit a relatively high hardness after the curing process. As a result, many current silicones lack a corrective capacity when an opening contracts, expands, or varies after sealing with a silicone sealant. Another known problem in the current state of the art is the large amount of waste associated with the use of silicone sealants. 15 The present invention aims to find a solution to at least some of the above-mentioned problems. SUMMARY OF THE INVENTION 20In the first aspect, the invention concerns a silicone sealing compound according to claim 1. Further preferred forms are set out in claims 2 to 19. The inventors of the present invention have found that the compound provides a high-quality sealing compound containing an alkoxy crosslinker. In a second aspect, the present invention concerns a sealing compound according to claim 20. More specifically, the present invention concerns a sealing compound comprising a silicone sealing compound according to one of claims 1-19 enclosed in an airtight container. Further preferred forms of the sealing compound are set out in claims 21 to 25. DETAILED DESCRIPTION The invention concerns a silicone sealing compound comprising a crosslinker with an alkoxy group. 2024 / 5881 BE2024 / 5881 3 Unless otherwise defined, all terms used in the description of the invention, including technical and scientific terms, have the meaning as they are generally understood by the expert in the technical field of theinvention. For a better assessment of the description of the invention, the following terms are explicitly explained. 5 “A”, “the” and “the” in this document refer to both the singular and the plural unless context clearly implies otherwise. For example, “a segment” means one or more than a segment. 10 When “approximately” or “around” is used in this document for a measurable quantity, a parameter, a duration or moment, and the like, variations are meant of + / - 20% or less, preferably + / - 10% or less, more preferably + / - 5% or less, even more preferably + / - 1% or less, and even more preferably + / - 0.1% or less than the quoted value, insofar as 15 such variations apply to the described invention. However, this must be understood to mean that the value of the quantity for which the term “approximately” or “around” is used is itself specifically disclosed. The terms “comprise”, “comprising”, “consist of”, “consisting of”, “provided with”, 20 “contain”, “containing”, “encompass”, “encompassing”, “contain”, “containing” aresynonyms are inclusive or open terms that indicate the presence of what follows, and that do not exclude or prevent the presence of other components, features, elements, members, steps, known from or described in the standard of technology.25 Citing numerical intervals through the endpoints includes all integers, fractions and / or real numbers between the endpoints, including these endpoints. Silicone sealants are versatile materials used30 in construction, automotive, and industrial applications because of their excellent flexibility, water resistance, and adhesion to various surfaces. These sealants form an elastic, durable layer that effectively protects against moisture, mold, and extreme temperatures, making them ideal for seams, joints, and surfaces that require long-term protection. The basis of the35 composition is often a polysiloxane polymer, which offers flexibility and elasticity. Crosslinkers are added to cure the material and form a sturdy mesh 2024 / 5881 BE2024 / 5881 4to form. Stabilizers, such as UV absorbers and antioxidants, protect the sealant against degradation by sunlight and oxygen, while fungicides prevent mold growth, which is particularly useful in humid environments such as bathrooms and kitchens. In a first aspect, the invention concerns a silicone sealing compound,5 whereby the composition is obtained by mixing 25-90 wt% one or more polysiloxanes, 5-35 wt% one or more plasticizers, 2-6 wt% one or more crosslinkers, 0.5-2 wt% one or more adhesion promoters and 0.01-0.3 wt% catalyst, with the characteristic that the silicone sealing compound contains crosslinkers of which comprise an alkoxy group.10 This composition contains during curing an emission of Volatile Organic Compounds of maximum 50 g / L. Polysiloxanes are polymers characterized by a unique Si-O-Si backbone (silicon-oxygen-silicon) with organic side chains, such as methyl or phenyl groups, that attach to the silicon atoms. This structure lends polysiloxanes their extraordinary properties, such as high flexibility and thermalstability, and resistance to water and chemicals. The combination of an inorganic silicon-oxygen chain with organic groups gives them the advantages of both inorganic and organic materials.20 In sealants, polysiloxanes offer excellent elastic and sealing properties. Thanks to their flexibility, they continue to perform effectively under tension and stretch without tearing or losing their adhesion. This makes them ideal for applications in dynamic joints and connections where movement or vibration25 occurs, such as in construction materials and automotive applications. Moreover, polysiloxanes naturally repel water and allow little moisture to pass through, making them an effective barrier in humid environments. Their thermal stability makes them resistant to high and low temperatures, which is essential for applications in extreme environments.30 In sealing compounds, different types of polysiloxanes can be used, each with its own properties. Preferably, polysiloxanes have a viscosity between 20,000 cps and 350,000 cps, preferably between 50,000 cps and 300,000cps, preferably between 100,000 cps and 250,000 cps, even more preferably between 150,000 cps and 200,000 cps. 2024 / 5881 BE2024 / 5881 5 In a form, the silicone sealant composition comprises polysiloxanes chosen from the group of α,ω-dihydroxypolydimethylsiloxane, aminoethyl-aminopropylfunctionalpolydimethylsiloxane, vinylpolydimethylsiloxane, phenylpolydimethylsiloxane. Preferably, the silicone sealant composition comprises α,ω-dihydroxypolydimethylsiloxane. 5 A silicone sealant composition according to the present invention comprises all components for curing, making it simple and quick to use. Thanks to the very specific composition perfected by the inventors, a high-quality sealing compound of the alkoxy type10 is obtained. A silicone sealing compound according to the current invention has the advantage that little to no volume loss occurs during the curing process. With classic sealing compounds, in the current state of the art15cracks and / or damage in the silicone sealant composition and between the silicone sealant composition and the material to which the silicone sealant composition is applied during the curing of the silicone sealant composition. As a result, the silicone sealant composition loses uniformity and compactness, resulting in an inefficient sealing of the sealing target. In a silicone sealant composition, crosslinkers ensure the curing process, whereby the material changes from a liquid or paste-like form into a solid, elastic structure. Crosslinkers react with moisture from the air or other reactive components in the composition, which leads to crosslinking between the polysiloxane chains. This crosslinking process creates a stable and flexible network that is resistant to temperature fluctuations, moisture, and other environmental factors. 30 In one form, the sealing compound does not contain a crosslinker comprising an oxime group. Oxime crosslinkers are based on methyl ethyl ketoxime.(MEKO) and are banned or restricted in some regions due to health risks. MEKO can be released during the curing process and is classified as a carcinogen by inhalation. Prolonged exposure to these vapors, especially in poorly ventilated areas, can cause respiratory problems and increase the risk of cancer. In addition, oxime crosslinkers can have other harmful effects, such as irritation of the skin, eyes, and respiratory tract. In one form, the silicone sealant composition comprises crosslinkers with an alkoxy group. This group comprises a reactive alkyl group that can interact with moisture in the air and thereby cure the polysiloxanes. Preferably, the crosslinker shows chemical similarities to the polysiloxane used. These crosslinkers have a molecular weight between 100 g / mol and 250 g / mol. The molecular weight can be calculated theoretically. In one form, the silicone sealant composition according to the present invention comprises one or more crosslinkers selected from the group ofmethyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, isobutyltrimethoxysilane and tetraethoxysilane, or any combination of the foregoing. Preferably, the silicone sealant composition15 contains vinyltrimethoxysilane. To keep the silicone sealant composition manageable during the production process and for the use of the composition, plasticizers may be added to the composition. This promotes the plasticity of the composition20 which ensures a malleable, paste-like substance before the composition is cured. In a formulation, the silicone sealant composition contains one or more organic plasticizers. Organic plasticizers have better biodegradability, are less harmful to the environment and health, and induce fewer chemical reactions than inorganic plasticizers.25 By adding one or more organic plasticizers to a silicone sealant composition, a smaller amount of inorganic plasticizers needs to be added.In a preferred design, a silicone sealant of the 30 alkoxy type according to the present invention contains one or more plasticizers selected from the group of, but not limited to, C4 to C8 alkyl terephthalate compounds including di-n-butyl terephthalate and di(2-ethylhexyl) terephthalate, glycerol triacetate (triacetin), 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, phthalate esters (e.g. dioctyl phthalate, di-2-ethylhexyl phthalate, diisophthalate, diisononyl phthalate, di-35 linear nonyl phthalate, di-linear nonyl phthalate, di-linear undecyl phthalate, di-linear undecyl phthalate, diisodecyl phthalate, C6-C10 straight-chain phthalates, C7 linear phthalate, 2024 / 5881 BE2024 / 5881 7 C9 linear phthalate, C11 linear phthalate, ditridecyl phthalate, undecyl dodecyl phthalate, di(2-propyl heptyl phthalate)nonyl undecyl phthalate, texanol benzyl phthalate, polyester phthalate, diallyl phthalate, n-butyl phthalyl-n-butyl glycosate, dicapryl phthalate, butylcyclohexyl phthalate, dicyclohexyl phthalate, butyl octyl phthalate, dioctyl adipate, di-2-ethylhexyl adipate,diisonyladipaat,diisoadipaat,diisodecyladipaat,ditridecyladipaat,dibutoxyethyl5 adipaat,dibutoxyethoxyadipaat,di(n-octyl,undecyl)adipaat,polyesteradipaat, polyglycoladipaten,trioctyltrimellitaat,tri-2-ethylhexyltrimellitaat,triisooctyl trimellitaat,triisononyltrimellitaat,triisodecyltrimellitaat,tri-n-hexyltrimellitaat, dioctylazelaat,di-2-ethylhexylglutaraat,di-2-ethylhexylsebecaat,dibutyl- sebecaat,dibutoxyethylsebecaat,triethylcitraat,acetyltriethylcitraat,tri-n-10 butylcitraat,acetytri-n-butylcitraat,acetyltri-n-hexylcitraat,n-butyl-tri-n- hexylcitraat,isodecylbenzoaat,diethyleenglycoldibenzoaat,dipropyleenglycol dibenzoaat,triethyleenglycoldibenzoaat1,4-cyclohexaandimethanoldibenzoaat, 2,2,4-trimethyl-1,3dibenzoaatpentaandiol,2,2-dimethyl-1,3-propaandiol dibenzoaat,C10-C21alkaanfenolestersofalkylsulfonzuurfenolesters,azijnzuur15 reactieproductenmetvolledigverhardecastorolie,pentaerythritoltetrabenzoaat, glyceroltribenzoaat,polypropyleenglycoldibenzoaat,triarylfosfaten,diisononylcyclohexane1,2-dicarboxylate, polymers of adipic acid / phthalates / adipates / sebecates / with glycols and often acid-terminated, butylbenzyl phthalate, alkylbenzyl phthalate, C7-C9 butyl phthalate, diethylene glycol dibenzoate, dipropylene glycol20 dibenzoate, 2-ethylhexyl benzoate, C9 benzoates, C10 benzoates, texanolic benzoate, ethylene glycol dibenzoate, propylene glycol dibenzoate, triethylene glycol dibenzoate, di-heptyl phthalate, dihexyl phthalate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, and diisobutyl phthalate, α,ω-trimethylsilylpolydimethylsiloxane, calcium stearate, and hydrogenated petroleum distillates, or any combination of the foregoing.25 Most preferably, the alkoxy type silicone sealant composition comprises one or more plasticizers selected from silicone oil comprising non-reactive polymers and hydrogenated petroleum distillates with a carbon chain comprising 11 to 25 carbon atoms. 30 Silicone sealants may contain adhesion promoters. Adhesion promoters are additives that improve the adhesion between thesealing compounds improve various substrates, such as glass, metal, plastic, or concrete. Without adhesion promoters, the silicone may struggle to remain firmly adhered to surfaces, especially under challenging conditions such as moisture, temperature fluctuations, and mechanical stress. 2024 / 5881 BE2024 / 5881 8 Adhesion promoters form a bridge between the silicone matrix and the substrate. They typically contain reactive groups that can bind to both the substrate and the polysiloxane, thereby enabling better adhesion. By creating a stronger interface, they improve the mechanical bonds and extend the lifespan of the seal under stressful conditions. In one form, the silicone sealing compound includes one or more adhesion promoters, preferably aminosilane-based adhesion promoters. Aminosilane-based adhesion promoters have a hydrophilic group that reacts with the substrate and an organic group that can form covalent or secondary bonds with the silicon chains.10The curing of the silicone sealant compound is a chemical process that can be accelerated by a catalyst. Catalysts accelerate the reaction that converts the liquid, paste-like silicone into a firm, elastic end product. Specifically, they ensure that the crosslinkers react faster and more efficiently with the polysiloxanes. As a result, crosslinking takes place more quickly, leading to a stable and elastic network that is resistant to mechanical stress, moisture, and temperature fluctuations. Without catalysts, curing would be slower or incomplete, which would affect the performance of the sealant. In one formulation, the catalyst is selected from the group of, but not limited to, dibutyltin dilaurate (DBDTDL), ethanol (tin oxide), tetrabutyltitanate, dioctyltin oxide, tetramethyldivinyltin, and platinum catalysts (e.g., Karstedt catalyst). divinylsilane, ethyltriacetoxysilane, methyltriacetoxysilane, alkyl titanates (e.g. tetrabutyl titanate), zirconium acetylacetonate, amine catalysts (e.g.trimethylamine), cobalt oxide, chromium oxide, cyclopentadienyl titanium compounds, 25 borate-enaluminate-based catalysts, dibutyltin diacetate, dibutyltin oxide, titanium chelate, titanates. In a preferred form, the silicone sealing compound comprises a catalyst based on dioctyltin oxide. In addition to a catalyst, an initiator can also be added to initiate the curing reaction. In an alkoxy-cured silicone sealant, methanol acts for this purpose. This occurs because methanol initiates the crosslinking reaction when alkoxy crosslinkers come into contact with moisture, which leads to hydrolysis and the formation of alcohols. This reaction produces a small amount of methanol that helps to promote the further curing reaction. Substances other than methanol are also possible; in a specific formulation, the initiator is chosen from the group of, but not limited to, ethanol, isopropanol, butanol, methyltriacetoxysilane, ethyltriacetoxysilane, diethylaminopropyltrimethoxysilane,dibutylaminopropyltriethoxysilane, tin(II) octoate, dibutyltin dilaurate, tetramethylguanidine, aminoalkoxysilanes, organophosphates, and organotitanates. In a preferred form, the silicone sealant composition contains methanol in a concentration between 0.1 and 1 wt%.5 Furthermore, a sealant composition may optionally include one or more stabilizers. These additives improve the stability of the product, both during storage and during use. They help maintain the physical and chemical properties of the sealants and provide protection against degrading influences such as UV radiation, heat, moisture, and oxidation. The function of stabilizers is multifaceted. They slow down the degradation of polysiloxanes by environmental factors, which extends the shelf life of the finished product. In addition, they improve processing by ensuring that the composition remains homogeneous during production, thereby guaranteeing consistent performance and quality.15 Stabilizers must be chemically inert, which means they must be compatible.are not allowed to cause any undesirable reactions with the other ingredients in the formulations. They are often effective at low concentrations, meaning that only small quantities are needed to have a significant impact on the stability of the product. One of the functions of stabilizers is to slow down the curing process of a silicone sealant. Because a silicone sealant in a specific form includes one or more stabilizers, it is prevented that the silicone sealant hardens faster than desired. In addition, the sealant can be processed more easily and a user has more time to apply the sealant to one or more sealing targets, or possibly make corrections to one or more newly applied silicone sealants. In a specific form, stabilizers are selected from the group of, but not limited to, toUV-absorbing benzotriazoles, hinderedamine light stabilizers (HALS),butylhydroxytoluene (BHT), phenolic antioxidants, phosphites, organophosphites, zinc oxide, magnesium oxide, titanium dioxide, organotin compounds, zirconium carboxylate, calcium carbonate, phenolic-hindered antioxidants, triphenyl phosphite, distearylpentaerythritol diphosphite, dialkyl phosphites, hindered phenol35 stabilizers, sulfur-containing antioxidants. The stabilizers are preferably 2024 / 5881 BE2024 / 5881 10 selected from the group of vinyl acetate, ethylene and titanium dioxide. In a preferred form, the stabilizer comprises at least titanium dioxide. In one form, the silicone sealant composition comprises one or more fungicides. The provision of fungicides in a silicone sealant composition5 in accordance with the present invention prevents fungi and / or associated microorganisms from colonizing the silicone sealant composition. In this way, it is avoided that silicone sealants and / or the sealing target are contaminated and possibly damaged by the aforementioned microorganisms.organisms. In a specific form, the fungicide is selected from the group of, but not limited to, zinc pyrithione, diiodomethyl-p-tolylsulfone (DIT), octylisothiazolinone (OIT), 2-N-octyl-4-isothiazolin-3-one, N-(trichloromethylthio)phthalimide (Folpet), benzisothiazolinone (BIT), methylisothiazolinone (MIT), chloromethylisothiazolinone (CMIT), propiconazole, iodocarb, terbutryn. 15 In a formulation, the silicone sealant composition contains fumed silica. In a preferred formulation, the silicone sealant composition contains 3 wt% to 10 wt% fumed silica. Adding a quantity of fumed silica increases the viscosity of the silicone sealant composition in such a way that it does not run after application, but remains sufficiently fluid to efficiently seal and / or coat rough and / or uneven sealing targets. This substantially simplifies the application of a silicone sealant composition. In a formulation, the silicone sealant composition contains one or more color powders. This addition induces a coloring of the composition and allowsto meet aesthetic wishes and / or needs for the use of the silicone sealant compound. The color powder can be chosen from the group of, but not limited to, red, blue, yellow, green, orange, purple, pink, brown, black, white, grey, turquoise, beige, magenta, lime, cyan, indigo, olive green, gold, silver, lavender, coral, peach, khaki, emerald green, navy blue, burgundy, mint green, terracotta, sepia, anthracite, cream, fuchsia, cerulean, aubergine, petrol, sanguine, sapphire, dark red, and lemon. In a specific form, the silicone sealant compound exhibits a weight loss of at most 20%, preferably at most 15%, and even more preferably at most 10% measured according to ISO standard 10563. This low weight loss offers several advantages. Firstly, limited weight loss contributes to the excellent stability of the compound during and after curing, which extends the service life of the sealant. It also helps maintain mechanical properties such as flexibility and adhesion, evenunder prolonged exposure to stressful environments. Additionally, it reduces the risk of shrinkage, which prevents cracks and detachments and promotes the overall sealing quality. Finally, a composition with minimal weight loss is also more resistant to the evaporation of volatile substances, resulting in a safe and durable application without harmful emissions. Silicone sealants can exhibit hardness. Hardness is the resistance a material offers to permanent deformation. A sealant with low hardness is more flexible and elastic, while a silicone sealant with higher hardness is stiffer and offers more resistance to abrasion and extrusion. In one form, the silicone sealant exhibits a Shore A hardness between 5-35. Thanks to this hardness, the composition exhibits flexibility to accommodate fluctuations in certain parameters of a sealing target, such as size, depth, surface area, or volume. The flexibility resulting from the low hardness allows 20the composition, according to the relevant design form, is designed to expand and / or contract to a limited extent if necessary. This ensures that optimal sealing of the sealing target is maintained in the event that one or more parameters of the sealing target alternate over time. 25 In a preferred design of a silicone sealing compound according to the current invention, the silicone sealing compound exhibits a modulus of 0.1-0.6 N / m² measured according to ISO standard 8339. The time until skin formation of a silicone sealant provides an indication of the hardening rate of the silicone sealant. In a preferred version of a silicone sealant according to the present invention, the silicone sealant will skin within less than 35 minutes at 23°C and 50% relative humidity. This has the advantage that the compound hardens relatively quickly, but that a user still has sufficient time to make any corrections to, for example, an incorrectly applied silicone sealant.2024 / 5881 BE2024 / 5881 12 In a second aspect, the invention concerns a method for producing a silicone sealant compound as described above. This method involves mixing one or more plasticizers selected from the group of, but not limited to, C4 to C8 alkyl terephthalate compounds including di-n-5 butyl terephthalates and di(2-ethylhexyl) terephthalate, glycerol triacetate (triacetin), 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, phthalate esters (for example, dioctyl phthalate, di-2-ethylhexyl phthalate, diisophthalate, diisononyl phthalate, di-linear nonyl phthalate, di-linear nonyl phthalate, di-linear undecyl phthalate, di-linear undecyl phthalate, diisodecyl phthalate, C6-C10 straight-chain phthalates, C7 linear phthalate, C9 linear phthalate, C11 linear phthalate, 10 dimethyl phthalate, undecyl dodecyl phthalate, di(2-propyl heptyl phthalate) nonyl undecyl phthalate, texanolbenzyl phthalate, polyester phthalate, dialyl phthalate, n-butyl phthalyl-n-butyl glycosate, dicapryl phthalate, butylcyclohexyl phthalate, dicyclohexyl phthalate, butyloctylphthalate, dioctyl adipate, di-2-ethylhexyl adipate, diisonyl adipate, diisoadipate, diisodecyl adipate, ditridecyl adipate, dibutoxyethyl adipate, dibutoxyethoxy adipate, 15 di(n-octyl,undecyl) adipate, polyester adipate, polyglycoladipates, trioctyl trimellitate, tri-2-ethylhexyl trimellitate, triisooctyl trimellitate, triisononyl trimellitate, triisodecyl trimellitate, tri-n-hexyl trimellitate, dioctylazelate, di-2- ethylhexyl glutarate, di-2-ethylhexyl sebecate, dibutyl-sebecate, dibutoxyethyl sebecate, triethyl citrate, acetyl triethyl citrate, tri-n-butyl citrate, acetyl tri-n-20 butylcitraat,acetyltri-n-hexylcitraat,n-butyl-tri-n-hexylcitraat,isodecylbenzoaat, diethyleenglycoldibenzoaat,dipropyleneglycoldibenzoaat,triethyleenglycol dibenzoaat1,4-cyclohexandimethanoldibenzoaat,2,2,4-trimethyl-1,3dibenzoaat pentaandiol,2,2-dimethyl-1,3-propaandioldibenzoaat,C10-C21alkaanfenolesters ofalkylsulfonzuurfenolesters,azijnzuurreactieproductenmetvolledigverharde25castor oil, pentaerythritol tetrabenzoate, glycerol tribenzoate, polypropylene glycol dibenzoate, triaryl phosphates, diisononylcyclohexane 1,2-dicarboxylate, polymers of adipic acid / phthalates / adipates / sebecates / with glycols and often acid-terminated, butylbenzyl phthalate, alkylbenzyl phthalate, C7-C9 butyl phthalate, diethylene glycol dibenzoate, dipropylene glycol dibenzoate, 2-ethylhexyl benzoate, C930 benzoates, C10 benzoates, texalanol benzoate, ethylene glycol dibenzoate, propylene glycol dibenzoate, triethylene glycol dibenzoate, di-heptyl phthalate, dihexyl phthalate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, and diisobutyl phthalate, or any combinations of the foregoing. Most preferably comprising silicone sealing compound of the alkoxy type one or more plasticizers35 selected from silicone oil comprising non-reactive polymers and 2024 / 5881 BE2024 / 5881 13 hydrogenated petroleum distillates with a carbon chain comprising 11 to 25 carbon atoms. Furthermore, the method for producing a silicone includessealing compound the addition of one or more real koxy crosslinkers,5 chosen from the group of, but not limited to, methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, isobutyltrimethoxysilanes and tetraethoxysilane, or any combinations thereof. In a specific form, the method comprises the addition of one or more10 stabilizers during the mixing of one or more polysiloxanes and one or more plasticizers. By adding one or more stabilizers at the start of the method, the hardening process of the silicone sealing compound is delayed. This has the advantage that the silicone sealing compound can be processed more easily and it is avoided that15 the silicone sealing compound hardens during the production process. Furthermore, the method comprises the addition of one or more refungicides during the mixing of one or more polysiloxanes and one or more plasticizers. Addition of one or more refungicides at the start of the production process20has the advantage that potentially present molds do not get a chance to colonize the silicone sealant compound during the production process. In this way, it is avoided that produced quantities of silicone sealant compounds are contaminated and wasted during the production process.25 In one form, the method involves adding and mixing in fumed silica after adding one or more crosslinkers. Fumed silica increases the viscosity of a silicone sealant compound, which ensures that the compound is easier to process and handle during the production process.30 In a further form, the method involves adding and mixing in one or more color powders after adding one or more crosslinkers. By adding one or more color powders it is possible to produce a large,35 uncolored batch of silicone sealing compound which is subsequently divided into two or more sub-batches to which one or more 2024 / 5881 BE2024 / 5881 14color powders can be added. This makes it possible to produce various colored silicone sealing compounds via a single production process. This, in turn, has the advantage that production proceeds faster, more efficiently, and cheaper. 5 In one aspect, the present invention concerns a sealing kit comprising a silicone sealing compound of the alkoxy type as described above, enclosed in an airtight packaging. An airtight packaging prevents a silicone sealing compound according to the present invention from hardening before this is desired and extends the shelf life of the compound. Moreover, the airtight packaging substantially simplifies its transport and storage. In one design form, the airtight packaging is a cylindrical polyethylene, polypropylene, or polyamide tube. The present invention exhibits little to no adhesion to these polymers, making the silicone sealing compound easy to remove from such a tube. The tubecan be cylindrical in shape, so that it contains no irregularities, thereby minimizing the amount of residual silicone remaining behind. 20 In one design form, the cylindrical tube comprises a nozzle and a plunger. This allows a user to extract a silicone sealant from a tube by moving the plunger in the direction of the nozzle. In one design form, the sealant kit comprises a hand gun. A hand gun 25 substantially simplifies moving a movable bottom element towards the nozzle of the tube. To the same extent, the hand gun simplifies the dispensing of a silicone sealant from the tube in question. A well-known problem in the technical field is the large amount of waste when one or more silicone sealants are used on a frequent basis. In one form, airtight packaging is a film. This film can be stored compactly after using up a sealant according to the relevant form. In this way, the amount of waste is limited.An additional advantage of foil as airtight packaging is that less storage space is required for storing the relevant sealant. This allows a larger quantity of sealants to be stored, or requires a smaller location to store the same number of sealants. In a further design, the sealant comprises a foil-connectable nozzle. This has the advantage that a silicone sealant compound can be easily applied directly from the foil packaging to the sealing target. In what follows, the invention is described by means of non-limiting examples that illustrate the invention, and which are not intended or should not be interpreted to limit the scope of the invention. 10 EXAMPLES EXAMPLE 1 A silicone sealant compound of the alkoxy type was produced as follows15: 30-70wt% polysiloxanes mixed with 10-30wt% plasticizer and 0.1-0.9wt% stabilizer. Then add 3-5wt% alkoxy crosslinker, after which 4-9wt% fumedMix silica. Subsequently add 1-1.5 wt% adhesion promoter and mix. Finally, add 0.05-1 wt% catalyst. The silicone sealant in question comprises the following ingredients: Ingredient wt% Polysiloxanes 30-70 Plasticizer 10-30 Stabilizer 0.1-0.9 Alkoxy crosslinker 3-5 Fumed silica 4-9 Adhesion promoter 1-1.5 Catalyst 0.05-0.1 This silicone sealant composition was tested on the following parameters. ParameterResultVolume loss(%)[ISO10563]5 Weight loss(%)[ISO10563]2 ShoreAhardhead[ISO868]12 Modulus at 100%(N / mm²)[ISO8339]0.2 2024 / 5881 BE2024 / 5881 16 Skinning at 23°C and 50% RH(min)10 Curing speed after 24 hours at 23°C and 50% RH(mm) 7 2024 / 5881 BE2024 / 5881