NL2021734B1

NL2021734B1 - Silyl modified polymer composition with improved booster

Info

Publication number: NL2021734B1
Application number: NL2021734A
Authority: NL
Inventors: Bernardus Wennekes Wilco; Frank De Block Rudolph
Original assignee: Strongbond B V
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2020-05-07
Also published as: WO2020067877A1; EP3856854A1

Abstract

The present invention is in the field of an improved silyl modi— fied terminated polymer used in a composition for use as a seal— ant or adhesive, and especially in combination with a specific booster comprising additives. The sealant may be used in various applications, such as in building and construction, industry, transportation, solar energy, marine, waterproofing, and so on.

Description

FIELD OF THE INVENTION

The present invention is in the field of an improved silyl modified terminated polymer used in a composition as sealant or as adhesive, and especially in combination with a specific booster comprising additives. The sealant or additive may be used in various applications, such as in building and construction, industry, transportation, solar energy, marine, waterproofing, and so on.

BACKGROUND OF THE INVENTION

Silyl modified polymers (SMPs), also referred to as modifiedsilane (MS) polymers, relate to so-called silane (also referred to as silyl) terminated polymers. This is a special class of polymers, polymers being large molecules having many repetitive units in a middle and long section thereof, which have as an end group of the long middle section, also referred to as a terminating group, a silyl type molecule. SMPs are main components in sealant and adhesive products, which may be solvent-free. These products are typically (iso)cyanate free. Sealant products manufactured with silyl modified polymers have good characteristics, such as adhesion on a wide range of substrate materials, and have good temperature and UV resistance. This makes these products applicable in a wide range of applications.

The silyl modified polymers can be formed using chemistry techniques. On application the products, such as an SMP sealant, cure from a liquid or gel state to an elastomer. Curing entails cross-linking by the hydrolysis and subsequent condensation of silyl ethers. Cross-linking improves certain characteristics of the final material.

The present invention makes use of a specific type of polymer, such as known as Kanaka's MS Polymer™ and other silyl-terminated polymers. Its unique properties enable MS Sealant (the sealant based on Kaneka MS Polymers) to deliver outstanding performances for a large variety of markets such as construction, industry, transportation, flooring, waterproofing, DIY and many others. As a middle section it contains a functionalized polyether backbone with methoxysilane terminal groups. It provides excellent performances and makes MS Polymer-based products unique and beneficial.

A broad range of MS Polymer™ grades are available. These may differentiate in degree of functionalization (number and nature of groups attached to the backbone) and backbone structure in a wide viscosity range. Typically a dimethoxysilyl terminated polyether (DMS MS) or trimethoxysilyl terminated polyether (TMS MS) is used.

Zeolites are aluminosilicate minerals with a porous struc· ture. They are used as commercial adsorbents and catalysts. Rapidly heating of the material results in large amounts of steam being produced from water that had been adsorbed by the material. A classic reference for the field is Breck's book Zeolite Molecular Sieves: Structure, Chemistry, And Use. Zeolites occur naturally and are also produced industrially on a large scale. Zeolites are solids with pore sizes in the order of magnitude of several Angstroms. Many unique zeolite frameworks have been identified, and over also many naturally occurring zeolites are known; in addition it is predicted that millions of hypothetical zeolite structures are possible. Zeolite structural groups may be classified according to the Nickel-Strunz classification (class 09.G) which is primarily a chemical based classification. In practice zeolites in view of their pore sizes are often only referred to as such (i.e. pore size in A zeolite) . The zeolite used by Saba in prior art applications is a 3A zeolite.

A MS sealant can be used as a one-component adhesive or as a two-component adhesive. For the two-component adhesive a booster may be added. The booster is intended to support strength buildup and cure speed. The booster typically contains water and is mixed with the MS sealant just before application. As a consequence of mixing the booster into the sealant the cure of the sealant is no longer limited by diffusion of moisture from the air as the booster provides water; the mixture shows bulk cure behavior. The prior art booster that is produced by Saba contains a molecular sieve (zeolite) to store the water and to prevent phase separation of the water during storage of the booster. However curing time and strength build-up is rather slow, and at least to slow for certain application where a fast strength build-up is required, such as for adhering a workpiece, such as a car window, a car panel, etc.

It is therefore an object of the present invention to provide a MS sealant which functions better for given purposes, without jeopardizing functionality and advantages.

SUMMARY OF THE INVENTION

The present invention relates to an improved modified silyl terminated polymer sealant according to claim 1, a kit of parts according to claim 14, and a use thereof according to claim 15. Using the present zeolite, such as a 5A zeolite, in the booster formulation instead of the standard 3A zeolite, an unexpected and not well understood improved balance between skin formation time and bulk cure speed is achieved. The present zeolite, compared to prior art zeolites, is considered to support the cure speed and bulk formation by driving a reaction towards the end product. The strength build-up in the bulk increases significantly, as determined by both rheological and tensile tests, without affecting the skin formation time. The booster contains water and is typically mixed with the MS sealant before application. The cure of the sealant is now no longer limited by diffusion of moisture from the air; the mixture shows bulk cure behavior. The booster that is produced by Saba contains a molecular sieve (zeolite) to store the water and to prevent phase separation of the water from the polymer during storage of the booster. For application it is preferred that the zeolite is in a fine powdery form and not in a usually provided pallet form. Especially when using the powdery form, the described results were obtained.

The present booster comprises 10-60 wt. % zeolite, preferably 20-50 wt.%, such as 30-45 wt.%, e.g. 40 wt.%. As the booster is mixed with the first component in a ratio of 1:100- 15:100 wt. booster:wt. first component, an amount of booster in a final composition is about 1-13 wt.%, based on the total composition. The booster may further comprise 30-90 wt.% polymer or plasticizer, or a mixture thereof (0.5-12 wt.% based on the total composition), preferably 40-60 wt.%, such as 45-50 wt.%, and small amounts of water, typically less than 15 wt.%. The polymer may be the same as in the first component, or different, or both. Zeolites may suitably be selected from Zeolites with chains of T10O20 tetrahedra, wherein T is selected from Si and Al and combinations thereof, such as clinoptilolite, heulandites, barrerite, stellerite, stilbites, brewsterites, zeolites with chains of 6membered rings such as tabular zeolites, e.g. bellbergite, bikitaite, chabazites, dachiardites, epistilbite, erionites, faujasites, ferrierite, gmelinite, herschelite, levynes, Linde type X, Linde type Y, maricopaite, mordenite, offretite, SSZ-13, wenkite, willhendersonite, zeolites with T5O10 units (T as above), such as edingtonite, gonnardite, kalborsite, natrolite, mesolite, paranatrolite, scolecite, tetranatrolite, and thomsonites, zeolites with chains of single connected 4-membered rings, such as analcime, goosecreekite, Laumontite, leucite, montesommaite, pollucite, wairakite, and yugawaralite, zeolites with chains of double connected 4-membered rings, such as amicite, boggsite, garronite, gismondine, gobbinsite, harmotome, Linde type L, mazzites, merlinoite, paulingites, perlialite, and phillipsites, and cowlesite, Linde type A, pentasil, tschernichite, CaA zeolites, CaX zeolites, NaX zeolites, NaY zeolites, wherein the pore size of said zeolite is from 0.4-2.1 nm (4-21 A), and if required (typically not) a remainder water. It is not well understood why smaller pore sizes, as typically used in the prior art, do not provide the present beneficial effects.

The main component of the sealant is a modified silyl terminated polymer. This polymer is present in an amount of 10-60 wt.%, based on a total weight of the sealant. It is preferred to use 20-50 wt.-% polymer, such as 30-45 wt.%, e.g. 35-44 wt.%.

As a further component a filler is used in an amount of 10-50 wt.%, preferably 20-45 wt.%, more preferably 30-40 wt.%.

As an optional component a plasticizer is added in an amount of 0-30 wt.%, preferably 1-20 wt.%, more preferably 2-15 wt.%, even more preferably 3-10 wt.%, such as 4-7 wt.%.

Further additives may be added in an amount of 0-15 wt.%, preferably 1-10 wt.%, more preferably 2-8 wt.%, even more preferably 3-7 wt.%, such as 4-6 wt.%.

The invention is mainly characterized by a specific selection of a zeolite, in combination with the silyl modified polymer. In principle also a combination of the present zeolites may be used, with a total weight thereof in the above range(s) (typically 1-5 wt.%).

Thereby the present invention provides a solution to one or more of the above-mentioned problems.

Advantages of the present description are detailed throughout the description.

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates in a first aspect to a sealant according to claim 1.

It is noted that the present zeolite it typically provided in a dried form, and then mixed with further booster components, such as water.

In an exemplary embodiment of the present sealant the pore size of said zeolite may be from 0.42-1.5 nm (4.2-15 A), preferably from 0.45-1.2 nm (4.5-12 A), more preferably from 0.47-1.0 nm (4.7-10 A), such as from 0.49-0.7 nm (4.9-7 A).

In an exemplary embodiment of the present sealant the zeolite is in powder form and may have an average particle size of smaller than 100 pm, preferably 1-60 pm, more preferably 10-50 pm, even more preferably 15-40 pm, such as 20-30 pm. It has been found that finely formed zeolite particles (< 100 pm) function significantly better in terms of curing speed, strength build up, and appearance of the final cured product.

In an exemplary embodiment of the present sealant the zeolite (dry) may be grinded, milled, sieved, and combinations thereof.

In an exemplary embodiment of the present sealant the filler may be selected from chalk, precipitated chalk, coated precipitated chalk, silica, carbon black, and combinations thereof. It preferably is a calcium carbonate based composition.

In an exemplary embodiment of the present sealant the plasticizer may be selected from benzoates, phthalates, terephthalates, polyols, such as polypropylene glycol (PPG), hydrogenated versions of phthalates, terephthalates, and benzoates, and combinations thereof. In view of toxicity polyols, terephthalates and benzoates are preferred. Examples of suitable terephthalates are dibutyl terephthalate, dipropyl terephthalate, and dipentyl terephthalate. Examples of suitable benzoates are mono-esters from benzoic acid and a Cg-Cie alcohol, preferably wherein the alcohol is a C9-C11 alcohol, preferably a C10 alcohol. Suitable polyols are for example PPG-2000, PPG 1000, and PPG2500.

In an exemplary embodiment of the present sealant the additives may be selected from catalysts, co-catalysts, rheology control agents, pigments, pigment pastes, HALS, UV stabilizers, antioxidants, adhesion promotors, drying agents, and combinations thereof.

In an exemplary embodiment of the present sealant the polymer may comprise a functionalized polyether backbone. The molecular weight average mass of the polymer is from 2000-50000 Da.

In an exemplary embodiment of the present sealant the polyether backbone may comprise methoxy or ethoxy silane terminal groups, typically at all ends, each comprising 1-3 methoxygroups, typically two or three methoxy-groups.

In an exemplary embodiment of the present sealant the modified silane polymer may comprise one or more -An-D-SiXYZ end groups, wherein A is a divalent linking group comprising at least one hetero atom, such as S,N,O,P, and Si, preferably O. D is a divalent hydrocarbon residue with 1-12 C-atoms, preferably 2-8 carbons, such as 3, 4, 5 or 6 carbon atoms. X, Y, Z are each independently substituents on the Si atom. They are independently selected from Ci-Cg alkyl, Ci-Cg alkoxy, Ci-Cg acyloxy, preferably C2-C5 alkyl, C2-C5 alkoxy, and C2-C5 acyloxy. At least one of the substituents X, Y, Z is a Ci-Cg alkoxy or Ci-Cg acyloxy. And further n is 0 or 1.

In an exemplary embodiment of the present sealant A may be selected from oxygen, -NR'-, amide, carbamate, urea, imino, carboxylate, carbamoyl, amidino, and carbonate, wherein R'=H or CiC4 alkyl, preferably oxygen or -NH-.

In an exemplary embodiment of the present sealant D may be selected from alkyl residues, such methyl, ethyl, and n-propyl.

In an exemplary embodiment of the present sealant the polyme may be selected from at least one of MS-polymers™, dimethoxy silyl terminated polyether, trimethoxy silyl terminated polyether, S203H, S303H,S227, S327, SAX 220, SAX 260, SAX350, SAX400, SAT010, SAX015, SAX115, SAT145, MAX602, MAX923, MAX951, SAX750, SAX510, SAX520, SAX 530, SAX540, SAX580, SAX590, MAX 451, MAX 480, MAX850; Desmoseal®, for example S XP 2458, S XP 2636, S XP 2749, S XP 2774, S XP 2821; Geniosil® for example STP-E10, STPE15, STP-E30, STP-E35, Evonik Polymer for example ST47, ST 48, ST 77, ST 61, ST 61 LV, ST 81, ST 80 and TEGOPAC® , for example Seal 100, Bond 150, and Bond 250.

In an exemplary embodiment of the present sealant the booste may comprise 30-80 wt.% silyl modified polymer or plasticizer, preferably 40-70 wt.% silyl modified polymer or plasticizer, such as 50-60 wt.% silyl modified polymer or plasticizer, and ΙΙΟ wt.% water, preferably 5-12 wt.% water, such as 7-10 wt.% water, and 40-60 wt.% zeolite.

In a second aspect the present invention relates to a use of the present sealant for sealing or bonding for increased strength built up, for adhering a workpiece, such as a car window, a car panel, for buildings, such as homes, sheds, factories, offices, and high-rise buildings, road-infrastructure,

such as viaducts, bridges, and fly-overs,

transport vehicles,

such as cars, trucks, busses, trains, vans, motorhomes, cara-

vans, and trailers, ships, such as yachts,

• ships, and boats, or

for improving storage stability.

In a third aspect the present invention relates to a kit of parts comprising at least one of a present first component and a present second component according to the invention, wherein a ratio of first component: second component is 100:1 to 100:15 (wt./wt.), preferably 100:3 to 100:12, more preferably 100:8 to 100:11, such as 100:9-100:10.

The invention is further detailed by the accompanying figures and examples, which are exemplary and explanatory of nature and are not limiting the scope of the invention. To the person skilled in the art it may be clear that many variants, being obvious or not, may be conceivable falling within the scope of protection, defined by the present claims.

SUMMARY OF FIGURES

Fig. 1 shows zeolites.

Fig. 2 shows strength build-up of sealants 2-5(rheometer method).

Fig. 3 shows strength build-up sealant 1	(rheometer method).
Fig. 4 shows strength build-up sealant 1	(tensile test method).

Fig. 5 shows skin formation times experimental sealants 2-5 and boosters .

EXAMPLES/EXPERIMENTS

The invention although described in detailed explanatory context may be best understood in conjunction with the accompanying examples and figures.

Experimental

Setup:-The experimental work described here is a selection from two different studies where the pore size of the zeolite was used as a variable. The other (sealant- and booster-) variations are not relevant for the purpose of this document and therefore not described in detail. In total, 5 MS sealant formulations are used: referred to as experimental sealant 1-5. A total of four booster compositions were investigated, see Table I.

Name	formulation	Type of zeolite
Booster 1	Standard formulation	o 3A
Booster 2	Standard formulation	o 5A
Booster 3	Improved formulation	o 3A
Booster 4	Improved formulation	o 5A

Table I: Booster formulations; formulations 3 and 4 comprise a rheology additive.

	Sealant 1	Sealant 2	Sealant 3	Sealant 4	Sealant 5
Polymer	47,4	45,1	45,1	46,4	46,4
stabilizers	0,5	0,4	0,4	0,4	0,4
moisture scavenger	2,8	3,3	3,3	3,4	3,4
rheology modifier	1,2	0,6	0,6	0,5	0,5
TiO2	1,0	1,0	1,0	1,0	1,0
CaCO3	45,1	39,0	39,0	40,2	40,2
plasticizer		8,8	8,8	6,1	6,1
adhesion promoter	1,4	1,3	1,3	1,4	1,4
low Sn containing catalyst		0,6		0,6
high Sn containing catalyst	0,6		0,6		0,6
Total	100	100	100	100	100

Table 2: composition of sealants used.

Booster 3A	Booster 5A
MS-polymer	50	50
Zeolite 3A	40
Zeolite 5A		40
Water	10	10

Table 3: booster compositions.

All sealants 1-5 were tested with both (3A and 5A) boosters.

Strength build-up by rheometer:

The strength build-up was determined using a series of stress sweeps with different waiting times. Using this method, a yield stress versus time plot can be obtained making it possible to compare cure speeds.

Strength build-up by tensile tester:

The tensile strength was measured as a function of time using ISO 37 type 2 dumbbells. When preparing the dumbbells, they were covered with a PE foil, minimizing the influence of the air and mimicking bulk cure behavior.

Skin formation time:

The so-called BK-recorder was used to determine the skin for mation time. A 450 pm thick layer of sealant/booster mixture was applied on a glass substrate and a 0,85 mm thick needle carrying 10 g of weight travels through the applied layer with a velocity of 2,5 mm/min. When the layer of sealant/booster mixture is cured, the needle can no longer penetrate the sample and continues to travel, scratching the top of the sample. Distance can be converted to time and a value for skin formation time is obtained. This test was carried out at 23°C and 50% relative humidity .

Results

From Figure 5 it may be concluded that the sealant composition is as expected the main cause for variation in skin formation times, rather than the booster composition. The skin formation time is hardly influenced by the type of zeolite used in the booster. The pore size has at best a very limited effect on skin formation if any effect at all.

The rheometer method strength build-up curves are given in Figure 2 for the sealants 2-4and Figure 3 for the sealant 1. Surprisingly, from these curves it can be concluded that the sealants mixed with the 5A zeolite containing booster show faster strength build-up than its 3A zeolite containing counterpart. Also, the tensile test results (Figure 4) confirm the faster strength build-up for the 5A zeolite in the first 72 hours .

For the purpose of searching the following section is added, of which the last section is a translation into Dutch.

1. 2-component composition for use as adhesive or sealant comprising a first component, the first component comprising

- 60 wt.% of a silyl modified polymer,

- 50 wt.% of filler,

- 30 wt.% of a plasticizer,

- 15 wt.% additives, characterized in a second booster component comprising 10-60 wt. % zeolite, wherein the pore size of said zeolite is from 0.42-2.1 nm (4,221 A), and an optional remainder water, with the proviso that the second component does not comprises a catalyst or co-catalyst, nor a reactive amine-functional group.

wherein all wt. % are relative to a total weight of the first or second component of the sealant respectively.

2. Sealant according to embodiment 1, wherein the pore size of 10 said zeolite is from 0.43-1.5 nm (4.3-15 A), preferably from

0.45-1.2 nm (4.5-12 A), more preferably from 0.47-1.0 nm (4.7-10 A), such as from 0.49-0.7 nm (4.9-7 A).

3. Sealant according to any of the preceding embodiments, wherein the zeolite is in powder form and has an average parti- cle size of < 100 pm.

4. Sealant according to any of the preceding embodiments, wherein the zeolite is selected from CaA zeolites, CaX zeolites, NaX zeolites, NaY zeolites, and a natural zeolite of NickelStrunz class 09.G.

5. Sealant according to any of the preceding embodiments, wherein the zeolite is grinded, milled, sieved, and combinations thereof .

6. Sealant according to any of the preceding embodiments, wherein the filler is selected from chalk, precipitated chalk, coated precipitated chalk, silica, carbon black, and combinations thereof.

7. Sealant according to any of the preceding embodiments, wherein the plasticizer is selected from benzoates, phthalates, terephthalates, polyols, hydrogenated versions of phthalates, terephthalates and benzoates, and combinations thereof.

8. Sealant according to any of the preceding embodiments, wherein the additives are selected from catalysts, co-catalysts, rheology control agents, pigments, pigment pastes, HALS, UV stabilizers, antioxidants, adhesion promotors, drying agents, and combinations thereof.

9. Sealant according to any of the preceding embodiments, wherein the polymer comprises a functionalized polyether backbone with methoxy silane terminal groups or ethoxy silane terminal groups, the modified silyl polymer comprises one or more An-D-SiXYZ end groups wherein:

A is a divalent linking group comprising at least one hetero atom,

D is a divalent hydrocarbon residue with 1-12 C-atoms,

X, Y, Z are each independently substituents on the Si atom, and are independently selected from Ci-Cg alkyl, Ci-Cs alkoxy, Ci-Cg acyloxy, and wherein at least one of the substituents X, Y, Z is a Ci-Cg alkoxy or Ci-Ce acyloxy, and n is 0 or 1,

10. Sealant according to embodiment 9, wherein A is selected from oxygen, -NR'-, amide, carbamate, urea, imino, carboxylate, carbamoyl, amidino, and carbonate, wherein R'=H or C1-C4 alkyl, preferably oxygen or -NH-.

11. Sealant according to any of embodiments 9-10, wherein D is selected from alkyl residues, such methyl, ethyl, and n-propyl.

12. Sealant according to any of the preceding embodiments, wherein the silyl modified polymer is selected from at least one of MS-polymers, dimethoxy silyl terminated polyether, and trimethoxy silyl terminated polyether.

13. Sealant according to any of the preceding embodiments, wherein the booster comprises 30-80 wt. % silyl modified polymer or plasticizer, and 1-15 wt. % water.

14. Kit of parts comprising at least one of a first component and a second component according to any of the preceding embodiments, wherein a ratio of first component: second component is 100:1 to 100:15 (wt./wt.).

15. Use of a sealant according to any of embodiments 1-13 for sealing or bonding joints for increased strength build- up, for adhering a workpiece, such as a car window, a car panel, for buildings, such as homes, sheds, factories, offices, and highrise buildings, road-infrastructure, such as viaducts, bridges, and fly-overs, transport vehicles, such as cars, trucks, busses, trains, vans, motorhomes, caravans, and trailers, ships, such as yachts, ships, and boats, or for improving storage stability.

Claims

CONCLUSIONS

A two-component composition for use as a sealant or as an adhesive, comprising

A first component, comprising the first component

10-60 wt% silyl modified polymer,

10-50 wt% filler,

0-30 wt% plasticizer,

0-15 wt% additives, characterized in a booster as a second component comprising 10-50 wt% zeolite, the pore size of the zeolite being 0.42-2.1 nm (4.2-21 Ά), and optionally the remainder water, with the proviso that the second component does not comprise a catalyst or co-catalyst, and no reactive amine functional group, all wt% being based on the total weight of the respective sealant components.

A sealant according to claim 1, wherein the pore size of the zeolite is 0.43-1.5 nm (4.3-15 A), preferably 0.4 5-1.2 nm (4.5-12 Ά) , more preferably 0.47-1.0 nm (4.7-10 Ά), such as from 0.49-0.7 nm (4.9-7 Ά).

The sealant of any of the preceding claims, wherein the zeolite is in powder form and has an average particle size of <100 µm.

Sealant according to any of the preceding claims, wherein the zeolite is selected from CaA zeolites, CaX zeolites, NaX zeolites, NaY zeolites, and a Nickel-Strunz class 09.G natural zeolite.

Sealant according to any of the preceding claims, wherein the zeolite is refined, milled, sieved, and combinations thereof

A sealant according to any preceding claim, wherein the filler is selected from chalk, precipitated chalk, coated precipitated chalk, silica, activated carbon, and combinations thereof.

A sealant according to any preceding claim, wherein the plasticizer is selected from benzoates, phthalates, terephthalates, polyols, hydrogenated versions of phthalates, terephthalates and benzoates, and combinations thereof.

A sealant according to any preceding claim, wherein the additives are selected from catalysts, cocatalysts, rheology control agents, pigments, pigment pastes, HALS, UV stabilizers, antioxidants, adhesion promoters, drying agents, and combinations thereof.

A sealant according to any of the preceding claims, wherein the polymer comprises a functionalized polyether backbone having methoxysilane end groups or ethoxysilane groups, the modified silyl polymer comprising one or more -An-D-SiXYZ end groups, wherein:

A is a divalent linking group comprising at least one heteroatom,

D is a divalent hydrocarbon radical having 1-12 C atoms, X, Y, Z are each independently substituents on the Si atom and are independently selected from C 1 -C 8 alkyl, C 1 -C 6 alkoxy, C 1 -Ceacyloxy, and at least one of the substituents X, Y, Z is a C 1 -C 6 alkoxy or C 1 -C 8 acyloxy, and n is 0 or 1,

A sealant according to claim 9, wherein A is selected from oxygen, -NR'-, amide, carbamate, urea, imino, carboxylate, carbamoyl, amidino, and carbonate, wherein R '= H or C 1 -C 4 alkyl, preferably oxygen or -NH-.

A sealant according to any of claims 9-10, wherein D is selected from alkyl radicals such as methyl, ethyl and npropyl.

The sealant of any of the preceding claims, wherein the silyl-modified polymer is selected from at least one of MS polymers, dimethoxysilyl-terminated polyether, and tri-methoxysilyl-terminated polyether.

A sealant according to any preceding claim, wherein the booster comprises 30-80 wt% silyl modified polymer or plasticizer, and 1-15 wt% water.

The kit comprising at least one of a first component and a second component according to any of the preceding claims, wherein a ratio of first component: second component is from 100: 1 to 100:15 (w / w).

Use of a sealant according to any one of claims 1-13 for sealing or bonding joints for increasing strength build-up, for bonding a workpiece, such as a car window, a car panel, for buildings, such as houses, sheds, factories, offices and high-rise buildings, road infrastructure, such as viaducts, bridges and viaducts, transport vehicles, such as cars, trucks, buses, trains, vans, campers, caravans and trailers, ships, such as yachts, ships and boats, or for improving the storage stability.