JP2006274170A - Adhering method and bonded structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for adhering capable of fixing an object to be adhered in a short time and the adhesive work also can be efficiently carried out and further not increasing a material cost, and a bonded structure. <P>SOLUTION: An adhesive 4, which is curable only by a base component and capable of accelerating its curing by adding a curing agent thereto, is used and further, after the application of the adhesive 4 using only the base component to a glass plate 1 as an object to be adhered is started, the adhesive 4 is applied under the addition of the curing agent to the base component, and as the application of the adhesive 4 is completed under applying only the base component, a part of the portion to be adhered can be quickly cured. The curing agent is not remained in a mixer, on this occasion, at the start and end of the application of the adhesive 4, and as the base component in the mixer is never cured by the curing agent, the cleaning of the inside of the mixer or the complete substitution of the inside of the mixer by the base component or the curing agent is not needed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bonding method and a bonding structure used for various industrial products and construction of buildings such as a vehicle window glass and a septic tank joint.

Conventionally, when a glass plate for a window of a vehicle is joined to a vehicle body, for example, an adhesive is applied to the peripheral portion of the glass plate, and then the glass plate and the vehicle body are assembled by assembling the glass plate at a mounting position of the vehicle body. I try to bond them. At this time, since the adhesive does not cure instantaneously, the glass plate is temporarily fixed by, for example, locking a stopper fixed to the upper end side of the glass plate to the vehicle body side (see, for example, Patent Document 1). ).
JP-A-5-96950

  By the way, when the glass plate is bonded with a one-component moisture curable adhesive, the one-component curable adhesive requires a longer time than the two-component curable adhesive, and in particular, the curing time is low under low temperature and low humidity. Since it becomes long, curing may take several days to several weeks in cold districts. For this reason, even after the vehicle was shipped from the factory, the glass plate could not be fixed with the adhesive, and for example, the glass plate vibrated during traveling, and abnormal noise was generated from the stopper portion. .

  In addition, when a two-component curable adhesive is used, it can be cured in a shorter time than a one-component curable adhesive, and thus the above-described problems can be solved. Therefore, it is necessary to strictly control the mixing ratio, and there is a problem that the efficiency of the bonding work is lowered. In addition, when using a two-component curable adhesive, the main agent and the curing agent are applied to the object to be bonded while mixing with the mixer, so the adhesive remaining in the mixer even while the bonding operation is suspended. Curing of the agent proceeds. For this reason, a complicated operation such as cleaning the mixer before the suspension of the operation or completely replacing the inside of the mixer with the main agent or the curing agent is required, and the efficiency of the bonding operation is also lowered in this respect. Furthermore, when starting the bonding operation, it is necessary to empty the adhesive until the mixed state of the two liquids is stabilized, so the application of the adhesive cannot be started quickly, and only the amount to be discharged. There was also a problem that the adhesive was consumed unnecessarily and the material cost was increased.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to fix an object to be bonded in a short time, to perform an adhesion work efficiently, and to reduce the material cost. An object of the present invention is to provide an adhesion method and an adhesion structure that do not increase.

  In order to achieve the above object, the present invention provides a bonding method in which an object to be bonded is bonded using an adhesive that can be cured only by the main agent and promote curing by adding a curing agent. On the other hand, the 1st application process which starts application of an adhesive only with a main ingredient, the 2nd application process which applies adhesive while adding a hardening agent to a main ingredient after the 1st application process, and a main ingredient after the 2nd application process And a third application step of ending application of the adhesive while applying only.

  Thus, after the application of the adhesive to the object to be bonded is started with only the main agent, the adhesive is applied while the curing agent is added to the main agent, and thereafter, the adhesive is applied while only the main agent is applied. Since it complete | finishes, the adhesion part which added the hardening | curing agent to the main ingredient hardens | cures rapidly. At this time, the curing agent does not remain at the beginning and end of application of the adhesive in the mixer in which the adhesive is mixed, and the main agent in the mixer is not cured by the curing agent during the suspension of the bonding operation.

  In addition, in order to achieve the above object, the present invention provides an adhesive structure in which an object to be bonded is bonded using an adhesive that can be cured only with the main agent and promotes curing by adding a curing agent. A first adhesive portion formed by applying an adhesive only with the main agent to the object to be bonded, and a second adhesive portion formed by adding a curing agent to the main agent and applying the adhesive are formed. .

  Thus, for example, after applying the adhesive to the object to be bonded using only the main agent to form the first adhesive portion, the adhesive is applied to the second adhesive portion while adding the curing agent to the main agent. After that, by applying the adhesive while applying only the main agent to form the first adhesive portion, it is possible to quickly cure the bonded portion in which the curing agent is added to the main agent. At that time, the curing agent is not left in the mixer for mixing the adhesive at the start and end of application of the adhesive, and the main agent in the mixer is not cured by the curing agent during the suspension of the bonding operation.

  According to the present invention, since a part of the bonded portion can be quickly cured, the object to be bonded can be fixed in a short time. At that time, the curing agent is not left in the mixer where the adhesive is mixed at the start and end of the application of the adhesive, and the main agent in the mixer is not cured by the curing agent, so the coating operation is suspended. At this time, it is not necessary to perform complicated operations such as cleaning the inside of the mixer or completely replacing the inside of the mixer with the main agent or the curing agent, thereby making it possible to increase the efficiency of the bonding operation. Also, when performing the bonding operation, the application of the adhesive can be started quickly, and it is not necessary to empty the adhesive until the mixed state of the two liquids is stabilized, so that the adhesive is consumed unnecessarily. The material cost can be reduced. Furthermore, since the adhesive can be cured only with the main agent, it is not necessary to strictly control the mixing ratio of the curing agent, which is extremely advantageous for improving the efficiency of the bonding operation.

  1 to 3 show an embodiment of the present invention. FIG. 1 is a diagram showing a special adhesive process for a glass plate, FIG. 2 is a schematic configuration diagram of an adhesive application device, and FIG. It is principal part side surface sectional drawing of a vehicle which shows an assembly | attachment state.

  A glass plate 1 shown in the figure is attached to a window glass on the front side or rear side of a vehicle, and stoppers 2 for temporary fixing are fixed by adhesive tape 2a at two places in the width direction on the upper end side. . When the glass plate 1 is bonded to the vehicle body 3, the adhesive 4 is applied to the peripheral portion of the glass plate 1 by the adhesive application device 5, and then the glass plate 1 is adsorbed to the vehicle body 3 by a gripping mechanism (not shown). Assemble.

  In the present embodiment, an adhesive 4 that can be cured only by the main agent and promotes curing by adding a curing agent is used. As the main agent of the adhesive 4, for example, a composition that contains a urethane prepolymer having an isocyanate group, carbon black, and a catalyst and can be cured by moisture in the air is used. More specifically, the composition is curable with moisture in the air, has a number average molecular weight of 1000 to 20000, and an average functionality (number of NCO groups held per molecule of prepolymer) of 2. A composition containing 0 to 3.0 isocyanate-terminated urethane prepolymer, 10 to 150 parts by weight of carbon black based on 100 parts by weight of the urethane prepolymer, and a catalyst is preferred as the main agent. In this case, the catalyst is a curing catalyst such as a tertiary amine or an organic tin compound, but may be a mixed catalyst thereof. Moreover, you may mix | blend a plasticizer, a calcium carbonate, clay, etc. with a main ingredient.

  The curing agent of the adhesive 4 has an average functionality (the number of active hydrogens that can react with NCO groups per molecule) that contains active hydrogen groups that can react with NCO groups from 1.5 to 4. Active hydrogen group-containing compound or a mixture thereof, wherein the number of active hydrogen groups is 0.1a to 10a (mol / g) with respect to the NCO group concentration a (mol / g) of the main urethane prepolymer A composition containing the active hydrogen group-containing compound or a mixture thereof is used. Here, a is a constant. In addition, as the curing agent, the average functionality (the number of active hydrogens that can react with NCO groups per molecule) containing active hydrogen groups that can react with NCO groups is 1.5 to 4.5. A composition in which 0.05 to 70 wt% of water is contained as an active hydrogen compound in the active hydrogen group-containing compound or a mixture thereof can also be used. As the active hydrogen group capable of reacting with the NCO group, a hydroxyl group, an amino group, and the like can be considered, and a polyol and an amine compound are equivalent. You may mix | blend a plasticizer, a calcium carbonate, a clay, a catalyst, carbon black, etc. with the said hardening | curing agent or the said hardening | curing agent composition.

  The adhesive application device 5 includes a mixer 5a for mixing the main agent and the curing agent of the adhesive 4, a nozzle 5b attached to the mixer 5a, and a first pump 5c for supplying the main agent from the main agent tank 4a to the mixer 5a. The second pump 5d supplies the curing agent to the mixer 5a from the curing agent tank 4b, and the adhesive 4 mixed by the mixer 5a is discharged from the nozzle 5d. The mixer 5a is a well-known static mixer, and moves along the bonded portion while discharging the adhesive 4 by a robot arm (not shown).

  Here, in the case of applying the adhesive 4 to the glass plate 1 as an object to be bonded, the application of the adhesive 4 is started from approximately the center in the width direction on the lower end side of the glass plate 1 as shown in FIG. After applying the adhesive 4 along the peripheral edge of the glass plate 1 in this order from one end side in the width direction to the upper end side, from the upper end side to the other end in the width direction, and from the other end in the width direction to the lower end side, the glass plate 1 The coating is finished at approximately the center in the width direction. At that time, firstly, the first pump 5c is operated to start application of the adhesive 4 only with the main agent (first application step), and when the application position moves to one end side in the width direction of the glass plate 1, the second pump 5d is operated to start addition of the curing agent (second coating step). As a result, the curing agent is mixed with the adhesive 4 while gradually increasing and applied to one end in the width direction of the glass plate 1. Thereafter, when the application position reaches the upper end side of the glass plate 1, the curing agent for the adhesive 4 reaches a prescribed mixing ratio, and when the application position reaches the other end in the width direction on the upper end side of the glass plate 1, 2 pump 5d is stopped and the addition of the curing agent is completed (third coating step). As a result, the curing agent remaining in the mixer 5 a is mixed with the main agent while gradually decreasing and applied to the other end in the width direction of the glass plate 1. And when the application position reaches the lower end side of the glass plate 1, the adhesive 4 becomes only the main agent, only the main agent is applied to the lower end side of the glass plate 1, and when the application position reaches almost the center in the width direction of the glass plate 1, The application of the adhesive 4 is finished. That is, by applying the adhesive 4 as described above, the first adhesive portion 4c obtained by applying the adhesive 4 to the glass plate 1 using only the main agent, and the adhesive by adding a curing agent to the main agent. 4 is formed, and a second adhesive portion 4d is formed.

  The glass plate 1 coated with the adhesive 4 as described above is assembled to the window portion of the vehicle body 3 and bonded to the flange portion 3a of the vehicle body 3 with the adhesive 4 as shown in FIG. At that time, each stopper 2 of the glass plate 1 is inserted into the hole 3b of the flange portion 3a, and the glass plate 1 is temporarily fixed to the flange portion 3a by engaging with the lower end of the hole 3b. Further, the gap between the glass plate 1 and the vehicle body 3 is closed by the sealing material 6.

  When the glass plate 1 is assembled to the vehicle body 3, the glass plate 1 is fixed to the vehicle body 3 by the curing of the adhesive 4. In this case, a first adhesive portion 4c in which only the main agent of the adhesive 4 is applied is formed on the lower end side of the glass plate 1, and an adhesive 4 in which a curing agent is added to the main agent is applied on the upper end side. Since the second bonding portion 4d is formed, the adhesive 4 on the upper end side of the glass plate 1 is cured in a shorter time than the lower end side. Thereby, even if the adhesive 4 on the lower end side of the glass plate 1 is not sufficiently cured, the upper end side is fixed by the curing of the adhesive 4, so that the glass plate 1 is stably held. Moreover, although the hole 3b of the flange part 3a is formed larger than the insertion part of the stopper 2, since the adhesive agent 4 around each stopper 2 also hardens | cures in a short time, each stopper 2 is fixed rapidly. At that time, the curing time can be shortened by heating the adhesive 4 around each stopper 2. In addition, since only the main agent is applied at the start and end of application of the adhesive 4, no curing agent remains in the mixer 5a.

  Thus, according to the present embodiment, the adhesive 4 that can be cured only by the main agent and can be accelerated by adding the curing agent is used, and the main agent is used for the glass plate 1 as an object to be bonded. Since the application of the adhesive 4 was started, the adhesive 4 was applied while adding the curing agent to the main agent, and the application of the adhesive 4 was terminated while only the main agent was applied. A part can be hardened rapidly and the glass plate 1 can be fixed in a short time. At that time, the curing agent does not remain in the mixer 5a at the start and end of the application of the adhesive 4, and the main agent in the mixer 5a is not cured by the curing agent. It is possible to increase the efficiency of the bonding work without requiring complicated work such as cleaning the inside of 5a or completely replacing the inside of the mixer 5a with the main agent or the curing agent. Also, when performing the bonding operation, the application of the adhesive 4 can be started quickly, and it is not necessary to empty the adhesive 4 until the mixed state of the two liquids is stabilized. There is no consumption, and the material cost can be reduced. Further, since the adhesive 4 can be cured only with the main agent, it is not necessary to strictly control the mixing ratio of the curing agent, which is extremely advantageous for improving the efficiency of the bonding operation.

  In this case, by using the main agent and the curing agent made of the composition shown in the present embodiment, the transition of the first coating process, the second coating process, and the third coating process can be performed smoothly and efficiently.

  Further, the adhesive 4 is such that an adhesive portion obtained by adding a curing agent to the main agent is positioned higher than an adhesive portion containing only the main agent with respect to the glass plate 1 in which a part of the adhesive portion is positioned above the other adhesive portions. Is applied, the upper end side of the glass plate 1 can be cured in a shorter time than the lower end side, and the temporarily fixed glass plate 1 can be reliably held. In this case, since the adhesive 4 around each stopper 2 of the glass plate 1 can also be cured in a short time, the stopper 2 can be quickly fixed. For example, the stopper 2 due to vibration of the glass plate 1 during traveling. It is possible to reliably prevent the generation of abnormal noises.

  Furthermore, since the mixer 5a comprising a well-known static mixer is used for mixing the main agent and the curing agent, the main agent and the curing agent can be reliably mixed with a simple structure, which is extremely advantageous for practical use.

  In addition, although the case where the window glass for vehicles was adhere | attached was shown in the said embodiment, this invention can be used also for adhesion | attachment of other uses, such as a junction part of a septic tank, construction of various industrial products, buildings, etc., for example. it can.

The figure which shows the adhesive agent special process to the glass plate which shows one Embodiment of this invention Schematic configuration diagram of adhesive applicator Side sectional view of the main part of the vehicle showing the assembled state of the glass plate

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Glass plate, 4 ... Adhesive, 4c ... 1st adhesion part, 4d ... 2nd adhesion part, 5a ... Mixer.

Claims (8)

In the bonding method of bonding an object to be bonded using an adhesive that can be cured only by the main agent and promote curing by adding a curing agent,
A first application step of starting application of the adhesive only with the main agent to the object to be bonded;
A second application step of applying an adhesive while adding a curing agent to the main agent after the first application step;
And a third application step of finishing application of the adhesive while applying only the main agent after the second application step. The bonding method according to claim 1, wherein a composition containing an isocyanate group-containing urethane prepolymer, carbon black, and a catalyst and curable with moisture in the air is used as the main agent of the adhesive. . The bonding method according to claim 2, wherein a composition containing an active hydrogen group-containing compound capable of reacting with an NCO group or a mixture thereof is used as a curing agent for the adhesive. The adhesion method according to claim 3, wherein 0.05 to 70 wt% of water is contained in the curing agent of the adhesive. The bonding method according to claim 1, 2, 3, or 4, wherein the main agent of the adhesive and the curing agent are mixed by a static mixer. In an adhesive structure in which an object to be bonded is bonded using an adhesive that can be cured only with the main agent and promotes curing by adding a curing agent,
Forming a first adhesive part formed by applying an adhesive only to the main agent to the object to be bonded, and a second adhesive part formed by adding a curing agent to the main agent and applying the adhesive. Characteristic adhesive structure. 7. The adhesive according to claim 6, wherein a composition containing an isocyanate group-containing urethane prepolymer, carbon black, and a catalyst and curable with moisture in the air is used as a main component of the adhesive. Construction. The adhesive structure according to claim 7, wherein a composition containing an active hydrogen group-containing compound capable of reacting with an NCO group or a mixture thereof is used as a curing agent for the adhesive.

Images