FI20216053A1

FI20216053A1 - Arrangement and method

Info

Publication number: FI20216053A1
Application number: FI20216053A
Authority: FI
Inventors: Juha Vauhkonen; Soilikki Kotanen
Original assignee: Kiilto Oy
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2023-04-12
Also published as: WO2023062274A1

Abstract

An arrangement and a method for the preparation of a reactive adhesive. The arrangement (100) comprises a dosing means (22) for dosing varying amounts of a catalyst in an adhesive component of said reactive adhesive, and a controller (4) arranged for controlling the dosing means (22) and the amount of the catalyst based on at least one control parameter. The at least one control parameter comprises a batch- specific information of the reactivity (R) of the reactive adhesive without said catalyst. A mixer (14) is arranged for mixing the catalyst and the adhesive component, and a feeding system (16) is arranged for receiving said reactive adhesive comprising the catalyst and the adhesive component and connectable to a gluing head (20).

Description

ARRANGEMENT AND METHOD

BACKGROUND

The invention relates to an arrangement for the prepara- tion of a reactive adhesive.

The invention further relates to a method for the prepara- tion of a reactive adhesive.

Industrial reactive adhesives are typically used for sand- wich panel constructions, wooden constructions, assembly and/or sealing. The reactive adhesive has a reaction speed (curing speed) that defines an open and pressing time on a manufacturing line using the adhesives. The reaction speed can vary from minutes to hours.

Complexity of industrial constructions using reactive ad- hesives 1s continuously growing, which leads to needs for tailored reactive adhesives at the manufacturing site. In other words, there is a need for providing several reac- tive adhesives having differentiate reaction speeds to the manufacturing site. Thus, an adhesive manufacturer produc- ing reactive adhesives needs to produce various “grades” or “types” of adhesives or their components. Shifting from producing one adhesive having first speed to produce an- other adhesive having second speed necessitates stopping

N and cleaning of the adhesive manufacturing line. This is

N challenging and limits production capacity of the adhesive - production line. Additionally, the same shifting problems - may be faced on the adhesive application site.

I

E 30 BRIEF DESCRIPTION 3 Viewed from a first aspect, there can be provided an ar- = rangement for the preparation of a reactive adhesive, the

N arrangement comprising - a dosing means for dosing varying amounts of a catalyst in an adhesive component of said reactive adhesive,

- a controller arranged for controlling the dosing means and the amount of the catalyst based on at least one con- trol parameter, wherein - the at least one control parameter comprises a batch- specific information of the reactivity of the reactive ad- hesive without said catalyst, - a mixer arranged for mixing the catalyst and the adhe- sive component, and - a feeding system arranged for receiving said reactive adhesive comprising the catalyst and the adhesive compo- nent and connectable to a gluing head.

Thereby an arrangement that enables increased production capacity of the adhesive manufacturing line and an adapta- ble control of reaction speeds at the adhesive application site may be achieved.

Viewed from a further aspect, there can be provided a method for the preparation of a reactive adhesive, the method comprising - dosing varying amounts of catalyst in an adhesive compo- nent of said reactive adhesive, - controlling the amount of catalyst based on at least one control parameter, wherein - the at least one control parameter comprises a batch- specific information of the reactivity of the reactive ad-

N hesive without said catalyst, 5 - mixing the catalyst and the adhesive component,

N - feeding said reactive adhesive to a gluing head, and - 30 - dosing the reactive adhesive to a substrate to be glued. i 0 Thereby a method that enables increased production capaci- o ty of the adhesive manufacturing line and an adaptable

N control of reaction speeds at the adhesive application

N 35 site may be achieved.

The inventions presented in this disclosure relates to ar- rangements and methods which are used to precisely control the addition of catalysts to reactive adhesives. The ar- rangement and the method measure and mix catalyst precise- ly on-demand, taking into account a batch-specific infor- mation of the reactivity of the resin from the adhesive manufacturer, and adjusts the reaction speed according to the resin batch in use.

The invention can be used e.g. in manufacturing and appli- cation of reactive adhesives, particularly adhesives sen- sitive to changeable parameters. The prevailing conditions affecting to the reaction speed at an adhesive application site, such as temperature and humidity, can be considered precisely, since the speed of adhesive is adjusted in situ on the adhesive application site. Further, the inventions enable the same resin part or prepolymer to be used in different stages of the adhesive application, for example in multistage assembly processes. Still further, the in- ventions reduce the carbon footprint of the adhesive manu- facturer and adhesive user.

The arrangement and the method are characterised by what is stated in the independent claims. Some other embodi- ments are characterised by what is stated in the other claims. Inventive embodiments are also disclosed in the

N specification and drawings of this patent application. The 5 inventive content of the patent application may also be

N defined in other ways than defined in the following - 30 claims. The inventive content may also be formed of sever-

E al separate inventions, especially if the invention is ex- 0 amined in the light of expressed or implicit sub-tasks or o in view of obtained benefits or benefit groups. Some of

N the definitions contained in the following claims may then

N 35 be unnecessary in view of the separate inventive ideas.

Features of the different embodiments of the invention may, within the scope of the basic inventive idea, be ap- plied to other embodiments.

In one embodiment, the dosing means comprises an additive pump arranged for providing the required pressure and mass flow for the catalyst, and the additive pump being con- trolled by the controller.

An advantage is that a simple and low-cost means for dos- ing may be achieved.

In one embodiment, the arrangement further comprises at least one of the following sensors communicatively con- nected to the controller for providing further control pa- rameter (s) for controlling of the amount of the catalyst: - a temperature sensor for sensing ambient temperature of the arrangement, - a humidity sensor for sensing ambient humidity of the arrangement, - a curing sensor for sensing the curing speed of the re- active adhesive made by the arrangement, - an inlet temperature sensor for sensing temperature of at least one of the components of the reactive adhesive entering in the arrangement, - a pressing system temperature sensor for sensing temper- ature of a pressing system arranged for pressing a sub-

N strate to be glued, and/or 5 - a timer for metering a gluing process. - 30 An advantage is that the catalyst amount can be adjusted

E even more precisely according to the current need, and in- n stant corrections of the dosing may be performed if a o measured parameter is changing.

N

N 35 In one embodiment, the controller comprises a digital con- trol system arranged for automatically controlling the amount of catalyst based on said at least one control pa- rameter.

An advantage is that using the arrangement is simple and 5 has low staffing requirements.

In one embodiment, the controller comprises a user inter- face for manually controlling the amount of catalyst based on said at least one control parameter.

An advantage is that quick changes in the reaction speed may be done.

In one embodiment, the arrangement is in form of a plug-in module comprising connectors for connecting the arrange- ment in a gluing arrangement already in use.

An advantage 1s that the arrangement can be connected eas- ily and quick to existing manufacturing lines using reac- tive adhesives.

In one embodiment, the reactive adhesive is multi- component adhesive, such as a two-component adhesive, com- prising a hardener component and a resin component, and the adhesive component is said hardener component.

O An advantage is that typically the hardener component has

A a low viscosity that enables easy dosing of the catalyst. — 30 In one embodiment, the catalyst is arranged to be dosed as

E diluted with a non-reactive solvent, such as dibasic ester n (DBE) .

LO

O

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N An advantage is that controlling of the amount of the cat-

N 35 alyst can be very accurate, especially when low amount of the catalyst is to be dosed, and that a homogenous mixing of the catalyst and the adhesive component may be reached also at low flow rates.

BRIEF DESCRIPTION OF FIGURES

Some embodiments illustrating the present disclosure are described in more detail in the attached drawings, in which

Figure 1 is a schematic view of an arrangement and method for the preparation of a reactive adhesive,

Figure 2 is a schematic view of a detail of the arrange- ment and method shown in Figure 1, and

Figure 3 is a schematic view of another arrangement and method for the preparation of a reactive adhesive.

In the figures, some embodiments are shown simplified for the sake of clarity. Similar parts are marked with the same reference numbers in the figures.

DETAILED DESCRIPTION

Figure 1 is a schematic view of an arrangement and method for the preparation of a reactive adhesive, and Figure 2 is a schematic view of a detail of the arrangement and method shown in Figure 1.

N 25

N In one embodiment, such as shown in Figures 1 and 2, the 2 reactive adhesive is a two-component adhesive that com-

Ir prises a hardener component and a resin component. The = hardener component is manufactured at a hardener produc- * 30 tion site 200 and the resin component at a resin produc- 3 tion site 300. The hardener production site 200 can be a = different site as the resin production site 300, but not

S necessary.

The hardener component and the resin component are trans- ported to an adhesive application site 400, wherein the arrangement 100 is arranged. The adhesive application site 400 may be e.g. a manufacturing plant or factory that pro- duces products that include glued structures. At the adhe- sive application site 400, the resin component may be ar- ranged to flow in a resin line 1 and the hardener compo- nent in a hardener line 2.

The arrangement 100 comprises a dosing means 22 (shown by dot-and-dash-line in Figure 2) that is configured to dose varying amounts of a catalyst in an adhesive component of a reactive adhesive. A controller 4 is arranged for con- trolling the dosing means 22 and the amount of the cata- lyst based on at least one control parameter to adjust the adhesive curing speed of the reactive adhesive according to current requirements at the adhesive application site 400.

The controller 4 typically comprises a digital control system implementing a control algorithm for managing and controlling operation of the arrangement 100, at least the amount of catalyst based on said at least one control pa- rameter. In one embodiment, the controller 4 is provided with a user interface 29 that allows a manual control of the amount of catalyst based on said at least one control

N parameter. In one embodiment, the controller 4 is provided 5 with a remote-control unit 17 that can communicate by wire

N and/or by wireless connection with the controller 4. - 30

E Said at least one control parameter comprises a batch- 0 specific information of the reactivity R of the reactive o adhesive without the catalyst. Said batch-specific infor-

N mation of the reactivity R can be defined e.g. by a hard-

N 35 ener or resin manufacturer or by a third party. In one em- bodiment, the information is provided to the adhesive ap-

plication site 400 or the controller 4 therein by a mes- sage, preferably by an electronic message, such as an email, SMS message, a message via an internet service pro- vider, etc., and then personnel is fed the information manually in the controller. In one embodiment, the infor- mation is transmitted to the controller via a cloud ser- vice from where the information is downloaded manually or automatically.

The arrangement 100 further comprises a mixer 14 that mix- es the catalyst with the adhesive component. The mixer 14 may be a static mixer or a dynamic mixer.

In one embodiment, such as shown in Figures 1 and 2, the catalyst is added to the hardener component (B component).

Then, the hardener component (including the catalyst) and the resin component are mixed in a second mixer 15 and thus the reactive adhesive is created. The reactive adhe- sive is then fed by a feeding system 16 to a gluing head 20. The gluing head 20 applies the reactive adhesive to an object to be glued. The object may be arranged in a press- ing system 21 configured to press the object a period needed for curing the adhesive to a predetermined load- bearing mechanical strength.

The second mixer 15 may be a static mixer or a dynamic

N mixer.

N oO

N The object to be glued may be e.g. a sandwich panel con- - 30 struction, a wooden construction, a composite structure, a

E filter structure, an assembly and/or sealing. The primary © function of the glue may be e.g. connecting or fixing ma- 3 terial surfaces to each other or establishing a seal. The

N gluing process may be very simple and guick, or more com-

N 35 plicated and time consuming, consisting of several gluing stages.

In another embodiment, the reactive adhesive is a multi- component adhesive comprising more than two components. In this embodiment, the catalyst is added to the hardener component too.

It is to be noted, however, that all components of a mul- ti-component adhesive, i.e. at least two components, may also be mixed with the catalyst in one mixer. In one em- bodiment, said mixer is a static mixer, such as a static spiral mixer.

In still another embodiment, the reactive adhesive is one- component adhesive. This embodiment is described more de- tailed in connection with Figure 3.

In one embodiment, the multi-component reactive adhesive is polyurethane (PU) adhesive. In this embodiment, the resin component comprises polyol whereas the hardener com- ponent comprises poly-isocyanate. The catalyst may com- prise e.g. organometal catalyst, such as tin- or bismuth- based catalyst, and/or amine-based catalyst, such as ter- tiary amine based catalyst.

In one embodiment, the catalyst is diluted with a solvent non-reactive with isocyanate, such as dibasic ester (DBE),

N triacetin, acetone, ethylene-glycol-dimethyl-ether, and/or 5 isocyanate, and said catalyst solution is dosed in the

N hardener component. - 30

E In one embodiment, the amount of the catalyst or catalyst n solution can vary from 0,0001 weight-% to 10 weight-% of o the reactive adhesive. In one embodiment, the amount of

N the catalyst or catalyst solution is selected in range of

N 35 0,0002 weight-% to 5 weight-% of the reactive adhesive. In one embodiment, the amount of the catalyst or catalyst so-

lution is selected in range of 0,0004 weight-% to 1 weight-% of the reactive adhesive.

In one embodiment, the multi-component reactive adhesive is Silane-Modified Polymer (SMP) comprising, at least a resin component and a hardener component as the adhesive components.

The catalyst of SMP may comprise e.g. organotin, organo- bismuth or other organometal catalysts as well as organic amines.

The catalyst may be dosed in the resin component or to the hardener component, or both.

In one embodiment, the catalyst is diluted with a non- reactive solvent selected from e.g. phthalates, glycols or other high boiling point liquids.

In one embodiment, the amount of the catalyst or catalyst solution of SMP can vary from 0,0001 weight-% to 10 weight-% of the reactive adhesive. In one embodiment, the amount of the catalyst or catalyst solution is selected in range of 0,0002 weight-% to 5 weight-% of the reactive ad- hesive. In one embodiment, the amount of the catalyst or catalyst solution is selected in range of 0,0004 weight-%

S to 1 weight-% of the reactive adhesive. &

N In one embodiment, the dosing means 22 comprises an addi- - 30 tive pump 7 that is arranged for pumping the catalyst/

E catalyst solution from an additive tank 5 and providing n the required pressure and mass flow for the catalyst. The o additive pump 7 is controlled by the controller 4. A fil-

N ter 6 may be provided to filter the catalyst/catalyst so-

N 35 lution.

The arrangement 100 may comprise various measuring instru- ments for monitoring flows of the catalyst/catalyst solu- tion, the resin and the hardener, which are communicative- ly connected to the controller 4 and used in controlling the dosage of the catalyst/ catalyst solution. These in- struments may comprise e.g. a pressure meter 8 arranged to measure pressure of the catalyst/catalyst solution, and flow meters 3, 9 and 31 measuring the flow per time unit of the hardener, the catalyst/catalyst solution and the resin, respectively.

In one embodiment, at least one of the flow meters 3, 9 and/or 31 1s a mass flow meter and controller, such as a thermal mass flow meter and controller. This type of flow meter is especially suitable for mass flows from 5 mg/h up to 1 kg/h. Another type of mass flow meter and controller is a coriolis mass flow meter and controller. This type of flow meter is especially suitable for mass flows from 50 mg/h up to 600 kg/h. An advantage of the mass flow meters and controllers is that a direct mass flow control is in- dependent of temperature and pressure.

In one embodiment, at least one of the flow meters 3, 9 and/or 31 is a volumetric flow meter based on ultrasonic wave technology (especially for mass flows from 2 ml/min up to 1500 ml/min), vortex or electromagnetic measurements

S (up to 250 1/min), for example.

O

N The arrangement 100 may comprise a shut-off valve 10 for - 30 interrupting the catalyst/catalyst solution to flow in the

E mixer 14. o 2 In one embodiment, the arrangement 100 is provided with a

N bypass line 32 for returning excessive catalyst/ catalyst

N 35 solution back to the additive tank 5. In the bypass line 32 there may be an adjustable liquid flow bypass valve 11 and a shut-off valve 12 controlled by the controller 4.

One advantage of the bypass line 32 is that a wide dosing range and pump efficiency may be achieved. For safety rea- sons the arrangement may be provided with a relief valve 13.

The arrangement 100 may further comprise at least one sen- sor communicatively connected to the controller 4 for providing further control parameter (s) that are used for controlling the amount of the catalyst dosed in the adhe- sive component, i.e. the hardener component in the embodi- ment shown in Figures 1 and 2.

In one embodiment, the sensor is sensing environmental conditions in the adhesive application site 400 or proxim- ity of the gluing head, for instance.

In one embodiment, the sensor is sensing parameters of the components of the reactive adhesive at the adhesive appli- cation site 400.

In one embodiment, the at least one sensor comprises a temperature sensor 23 that is arranged for sensing ambient temperature of the arrangement 100.

In one embodiment, the at least one sensor comprises a hu-

N midity sensor 24 that is arranged for sensing ambient hu- 5 midity of the arrangement 100. - 30 In one embodiment, the at least one sensor comprises a

E curing sensor 25 for sensing the curing speed of the reac- n tive adhesive made by the arrangement 100. In one embodi- o ment, the curing sensor 25 is arranged to measure the cur-

N ing speed of the reactive adhesive glued on a test piece.

N 35

In one embodiment, the curing sensor 25 comprises a sensor measuring viscosity of the reactive adhesive.

In one embodiment, the curing sensor 25 comprises a sensor measuring electrical conductivity of the reactive adhe- sive.

In one embodiment, the curing sensor 25 comprises a sensor measuring decreasing of an isocyanate peak by a FTIR (Fou- rier transform infrared) or RAMAN spectroscopy. This kind of curing sensors are suitable for measuring polyurethane adhesives.

In one embodiment, the curing sensor 25 comprises a sensor measuring temperature of the reactive adhesive. This kind of curing sensor is suitable for measuring reactive adhe- sives that changes temperature during their curing pro- cess, such as polyurethane adhesives.

In one embodiment, the curing speed is measured by a manu- al open time test, i.e. done manually by personnel.

In one embodiment, the curing speed is measured by arrang- ing a test sample of the reactive adhesive to the curing sensor 25. In another embodiment, the curing sensor 25 is _ arranged in the structure of the object to be glued.

S

O In one embodiment, the at least one sensor comprises an

N inlet temperature sensor 26 for sensing temperature of at - 30 least one of the components of the reactive adhesive en-

E tering in the arrangement 100, for instance in the resin 2 line 1 and/or the hardener line 2. 3

N In one embodiment, the at least one sensor comprises a

N 35 pressing system temperature sensor 27. This sensor is sensing temperature of a pressing system 21 that presses or clamps substrates to be glued.

In one embodiment, the at least one sensor comprises a timer 28 that meters the gluing process using the reactive adhesive.

In one embodiment, the arrangement 100 is constructed in a form of a plug-in module that can be added to an existing gluing arrangement already in use. Said arrangement pref- erably comprises connectors 30 that speed up the connect- ing of the arrangement to the existing gluing arrangement.

In one embodiment, at least one of the connectors compris- es a quick release coupling or a rapid connector. In one embodiment, the plug-in module is constructed to one or more box(es) or container(s) 34 that can be transported easily and safe to the adhesive application site 400.

In one embodiment, the arrangement and the method are adapted to process a one-component reactive adhesive. In this embodiment, the catalyst is added to a prepolymer of the one-component reactive adhesive. The prepolymer is manufactured in a manufacturing site (not shown in Figure

N 3) and transferred to an adhesive application site for use 5 by the arrangement 100. - 30 The prepolymer may be arranged to flow in a prepolymer

E line 33 through the arrangement 100. The operation of the n arrangement and the method follows the principle already o described in connection with Figures 1 and 2, apart from

N mixing the resin and the hardener in the second mixer.

N 35

In one embodiment, the one-component reactive adhesive is polyurethane (PU) adhesive.

In one embodiment, the one-component reactive adhesive is

Silane-Modified Polymer (SMP).

The invention is not limited solely to the embodiments de- scribed above, but instead many variations are possible within the scope of the inventive concept defined by the claims below. Within the scope of the inventive concept the attributes of different embodiments and applications can be used in conjunction with or replace the attributes of another embodiment or application.

The drawings and the related description are only intended to illustrate the idea of the invention. The invention may vary in detail within the scope of the inventive idea de- fined in the following claims.

N

O

N

O

I jami a 0

LO

O

N

O

N

REFERENCE SYMBOLS

1 resin line 2 hardener line 3 flow meter 4 controller 5 additive tank 6 filter 7 additive pump 8 pressure meter 9 flow meter 10 shut-off valve 11 (needle) valve 12 shut-off valve 13 relief valve 14 mixer 15 second mixer 16 feeding system 17 remote control 18 dosing valve 19 dosing valve 20 gluing head 21 pressing system 22 dosing means 23-28 Sensors 29 user interface

S 30 connector

O 31 flow meter

N 32 bypass line - 30 33 prepolymer line

N 300 resin production

N 35 400 adhesive application site

R batch-specific information of the reactivity

N

O

N

O

I a a 0

LO

O

N

O

N

Claims

1. An arrangement for the preparation of a reactive adhe- sive, the arrangement (100) comprising - a dosing means (22) for dosing varying amounts of a cat- alyst in an adhesive component of said reactive adhesive, - a controller (4) arranged for controlling the dosing means (22) and the amount of the catalyst based on at least one control parameter, wherein - the at least one control parameter comprises a batch-specific information of the reactivity (R) of the reactive adhesive without said catalyst, - a mixer (14) arranged for mixing the catalyst and the adhesive component, and - a feeding system (16) arranged for receiving said reac- tive adhesive comprising the catalyst and the adhesive component and connectable to a gluing head (20).

2. The arrangement as claimed in claim 1, wherein - the dosing means (22) comprises - an additive pump (7) arranged for providing the required pressure and mass flow for the catalyst, and - the additive pump (7) being controlled by the controller

(4).

3. The arrangement as claimed in any of the preceding - claims, further comprising at least one of the following O sensors communicatively connected to the controller (4) O for providing further control parameter(s) for controlling n of the amount of the catalyst: T 30 - a temperature sensor (23) for sensing ambient tempera- E ture of the arrangement (100), 8 - a humidity sensor (24) for sensing ambient humidity of 3 the arrangement (100), N - a curing sensor (25) for sensing the reactivity of the N 35 reactive adhesive made by the arrangement (100),

- an inlet temperature sensor (26) for sensing temperature of at least one of the components of the reactive adhesive entering in the arrangement (100), - a pressing system temperature sensor (27) for sensing temperature of a pressing system (21) arranged for press- ing a substrate to be glued, and/or - a timer (28) for metering a gluing process.

4. The arrangement as claimed in any of the preceding claims, wherein - the controller (4) comprises a digital control system arranged for automatically controlling the amount of cata- lyst based on said at least one control parameter.

5. The arrangement as claimed in any of the preceding claims, comprising - a user interface (29) for manually controlling the amount of catalyst based on said at least one control pa- rameter.

6. The arrangement as claimed in any of the preceding claims, further comprising - the gluing head (20) arranged for applying the reactive adhesive to an object to be glued.

7. The arrangement as claimed in any of the preceding N claims, 5 - being in form of a plug-in module comprising connectors N (30) for connecting the arrangement (100) in a gluing ar- - 30 rangement already in use. i

2 8. The arrangement as claimed in any of the preceding 2 claims, wherein N - the reactive adhesive is one-component adhesive, and N 35 wherein - said adhesive component is a prepolymer thereof.

9. The arrangement as claimed in any of claims 1 - 7, wherein - the reactive adhesive is multi-component adhesive, such as a two-component adhesive, comprising a hardener compo- nent and a resin component, and wherein - the adhesive component is said hardener component.

10. The arrangement as claimed in claim 9, comprising - a second mixer (15) arranged for mixing the hardener com- ponent including the catalyst added therein with further component (s) of the reactive adhesive.

11. The arrangement as claimed in any of the preceding claims, wherein - the reactive adhesive is polyurethane (PU) adhesive.

12. The arrangement as claimed in any of claims 1 - 10, wherein - the reactive adhesive is Silane-Modified Polymer (SMP).

13. The arrangement as claimed in claim 11, wherein - the catalyst comprises organometal catalyst, such as tin- or bismuth-based catalyst, and/or amine-based cata- lyst, such as tertiary amine-based catalyst. S

14. The arrangement as claimed in any of the preceding S claims, wherein i - the catalyst is arranged to be dosed as diluted with a - 30 non-reactive solvent, such as dibasic ester (DBE), tri- E acetin, acetone, ethylene-glycol-dimethyl-ether, and/or Ro isocyanate. 3 N

15. A method for the preparation of a reactive adhesive, N 35 the method comprising

- dosing varying amounts of catalyst in an adhesive compo- nent of said reactive adhesive, - controlling the amount of catalyst based on at least one control parameter, wherein - the at least one control parameter comprises a batch- specific information of the reactivity (R) of the reactive adhesive without said catalyst, - mixing the catalyst and the adhesive component, - feeding said reactive adhesive to a gluing head (20), and - dosing the reactive adhesive to a substrate to be glued.

16. The method as claimed in claim 15, wherein - the reactive adhesive is a multi-component adhesive, such as a two-component adhesive, comprising a hardener component and a glue component, and wherein the method comprises - dosing the catalyst in said hardener component.

17. The method as claimed in claim 15 or 16, comprising - sensing via at least one sensor (23-28) environmental conditions having effect to the gluing process, and - controlling the amount of catalyst based on said sens- ing, wherein the environmental conditions comprise at least one of the following: - ambient temperature, N - ambient humidity, 5 - the curing speed of dosed reactive adhesive, N - temperature of at least one of the components of the re- - 30 active adhesive, E - temperature of a pressing system (21) arranged for 0 clamping a substrate to be glued, and/or o - gluing time. N N 35