JPH0752644A - Method for bonding vehicle window pane - Google Patents

Abstract

PURPOSE:To quickly hold a vehicle window pane in the correct position with safficient adhesive strength without deteriorating production efficiency by packing a heat application type adhesive having predetermined H-strength before curing between the window pane held in position and the vehicle. CONSTITUTION:A vehicle window pane 10 is held in position using a clip with respect to a vehicle body 12 and a dam 16 that stops the flow of an adhesive 14 during bonding and keeps the window pane 10 and the vehicle body 12 a predetermined distance away from each other is installed. A primer is applied to their bonding positions, and a heat application type adhesive 14 having an H-strength before curing of 0.1kg/cm<2> or more and being melted is injected to fill between the window pane 10 and the vehicle body 12. Therefore sufficient adhesive strength is achieved through quickened bonding, and so vehicle assembling efficiency can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonding method for attaching a window glass to a vehicle such as an automobile or a train. More specifically, the present invention relates to a vehicle window glass adhering method which has good workability and can hold the window glass promptly and reliably with sufficient adhesive force after adhering the window glass to a predetermined position of the vehicle.

[0002]

2. Description of the Related Art Adhesion (attachment) of a window glass disposed in a vehicle such as an automobile to a body of the automobile is performed by applying an adhesive (sealant) to the window glass and placing the window glass in a predetermined position on the body. It is performed by pressing, so-called direct glazing.

FIG. 3 conceptually shows this direct glazing. In the adhesion of window glass by this method,
First, the adhered positions of the window glass 100 and the body 102 are cleaned. Then, at a predetermined position on the window glass 100,
A dam 106 that stops the flow of the sealant 104 at the time of adhering the window glass 100 and holds the gap between the window glass 100 and the body 102 at a predetermined distance is attached.

Further, after a primer for improving the adhesiveness is applied to the adhered positions of both, a sealant 104 is applied to a predetermined position of the window glass 100 to have a shape suitable for adhesion, while the window frame is In the case of the molding structure, a clip (not shown) that defines the position of the window glass 100 is attached to a predetermined position of the body 102. afterwards,
As shown in FIG. 3, the window glass 100 is pressed to a predetermined position on the body 102, and the window glass 10 is pressed by the sealant 104.
0 and the body 102 are bonded. Further, the molding 108 is attached if necessary. Here, the window glass 100
Since the dam 106 is attached to the sealant 104, the sealant 104 does not flow to an unnecessary portion, and the gap between the window glass 100 and the body 102 is maintained at a predetermined distance.

In the bonding of the window glass 100 and the body 102 by such direct glazing, a one-component urethane sealant is usually used as the sealant 104. As is well known, the one-component urethane sealant is cured by moisture, but until the sealant starts curing and exhibits sufficient adhesive strength,
It usually takes about one hour. Therefore, during that time, it is necessary to press (hold) the window glass 100 with various jigs or the like.

Here, in consideration of workability of assembling an automobile or the like, it is preferable to attach a so-called lid such as a window glass at the end of the assembling process. After bonding, the vehicle cannot be moved out of the factory until the one-pack type urethane sealant exhibits sufficient adhesive strength, resulting in a significant decrease in production efficiency. On the other hand, if the window glass is installed first in consideration of the curing time of the one-pack type urethane sealant, the subsequent assembly work for the interior etc. will be done in a narrow car, resulting in a deterioration of the assembly work efficiency, and still a one-pack type. It is necessary to hold the window glass until the mold urethane sealant is fully cured.

In order to solve such a problem, it is possible to use a so-called hot-melt type sealant as a one-component type urethane sealant which exhibits sufficient adhesiveness from the initial stage of the adhesion. However, when direct glazing is performed using a hot melt type sealant that exhibits sufficient adhesiveness from the initial stage of adhesion, that is, the sealant 10 is applied to the window glass 100.
When 4 is applied to form a shape as shown in the upper part of FIG. 3 and then the window glass 100 is pressed to a predetermined position of the body 102 to be adhered, the sealant 104 is so hard that it is very difficult to press the window glass 100. A large force is required, and depending on the characteristics of the sealant, it may not be possible to push the window glass 100 to a predetermined position on the body 102.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art. After adhering a window glass to a predetermined position of a vehicle, the window glass can be secured quickly and with a sufficient adhesive force. The window glass can be held at a predetermined position on the body, and the production efficiency does not decrease even if the step of bonding the window glass and the body is performed at the end of the vehicle assembly process.
It is an object of the present invention to provide a vehicle window glass bonding method that can improve both workability and vehicle productivity by, for example, eliminating the need for a jig or the like for holding the window glass at a predetermined position on the body after bonding.

[0009]

In order to achieve the above-mentioned object, the present invention holds a vehicle window glass in a predetermined position with respect to a vehicle, and between the vehicle and the vehicle window glass, before curing. A method for adhering a window glass for a vehicle, characterized in that the above H-type strength is filled with a heat-applied adhesive having a strength of 0.1 kg / cm ² or more.

The method for adhering a window glass for a vehicle according to the present invention will be described in detail below. FIG. 1 conceptually shows an example of a vehicle window glass bonding method (hereinafter, referred to as a bonding method) of the present invention. In the bonding method of the present invention, first, as shown in FIG. 1A, a vehicle window glass 10 (hereinafter, referred to as window glass 10) is attached to a vehicle body 12 (hereinafter, referred to as body 12). Hold in place.

That is, as in the case of the conventional direct glazing shown in FIG. 3 described above, after the positions of the window glass 10 and the body 12 to be adhered are cleaned, the window glass 10 is adhered to a predetermined position of the window glass 10 when the window glass 10 is to be bonded as described later. A dam 16 that stops the flow of the sealant (adhesive) 14 and holds the gap between the window glass 10 and the body 12 at a predetermined distance is attached. The method of attaching the dam 16 is not particularly limited, and a known method such as a method using a double-sided tape or a method using various adhesives may be used.

Next, a primer for improving adhesiveness is applied to the adhered positions of the window glass 10 and the body 12, and when the window glass frame has a molding structure,
A clip (not shown) for defining the window glass 10 is attached to the body 12 at a predetermined position. The type of the primer is not particularly limited, and a commonly used one may be appropriately selected according to the type of the sealant 14 described later. Further, in the present invention, the primer is not always necessary and may not be applied in some cases.

After the preparations necessary for bonding the window glass 10 and the body 12 have been prepared as described above, the window glass 10 is placed at a predetermined position with respect to the body 12 as shown in FIG. 1 (a). Hold, that is, the window glass 1 at a predetermined position after bonding
Holds 0. The holding method is not particularly limited, and a method using various jigs or holding members, a method using an industrial robot, or the like may be used.

After holding the window glass 10 at a predetermined position with respect to the body 12 in this manner, as shown in FIG. 1B, the sealant 14 is injected into the gap between the window glass 10 and the body 12. Fill. Here, the sealant 14 used in the bonding method of the present invention is a heat-applied adhesive (heat-applied sealant) having an H-shaped strength before curing of 0.1 kg / cm ² or more. Therefore, in the bonding method of the present invention, while the window glass 10 and the body 12 are held at predetermined positions, the heated sealant 14 is injected and filled in the gap between the window glass 10 and the body 12 by injection or the like. The step of bonding the glass 10 and the body 12 can be performed. Moreover, since the sealant 14 has an H-shaped strength before curing of 0.1 kg / cm ² or more, it is possible to quickly obtain a sufficient adhesive strength after the window glass 10 and the body 12 are bonded to each other. The bonding step 12 is performed at the end of the vehicle assembly step, and the vehicle can be quickly moved to the outside of the factory after the bonding step is completed, so that the vehicle production efficiency can be improved.

The H-type strength referred to here is JASO.
M338-89 Curing rate measurement B method. That is, as shown in FIG. 2, the sealant 1
4, a triangle having a base a of 8 mm and a height b of 13 mm is formed on a glass plate, and another glass plate is pressed against this to set a gap c between the glass plates to 6 mm, and the glass plate is pressed in the direction opposite to the pressing direction ( The force required for peeling in the direction of arrow d in FIG. 2)
In the present invention, a heat-applied sealant 14 having an H-type strength before curing of 0.1 kg / cm ² or more is used.

Various known sealants can be used as such a sealant 14, and the following are specifically preferred examples. First, as a heating type one-pack type urethane (so-called auto upright type urethane) sealant, a polyether polyol having a number average molecular weight of 1,000 to 7,000 and a polyisocyanate compound disclosed in Japanese Patent Application No. 4-50912. With an isocyanate group / hydroxyl group equivalent ratio of 1.1 to 2.5, and a urethane prepolymer (A), and a polyether polyol having a number average molecular weight of 500 to 3000 or a number average molecular weight. After reacting a polyester polyol of 500 to 6000 with a polyisocyanate compound at an amount ratio of an isocyanate group / hydroxyl group equivalent ratio of 1.1 to 2.5, a monoalcohol having 1 to 22 carbon atoms is further added. Containing a polyurethane compound (B) having no free isocyanate group obtained by reacting The content of the urethane compound (B) is 1 to 19 parts by weight based on 100 parts by weight of the total of the urethane prepolymer (A) and the polyurethane compound (B). With 0.1kg / cm ² or more;

In the urethane prepolymer derived from polyether polyol disclosed in Japanese Patent Application No. 4-238443, diester compounds represented by the formulas (1) and (2), and the formulas (3) and ( Among the one-component urethane sealants selected from the group consisting of polyester compounds having a number average molecular weight of 500 to 6000 represented by 4) and having a melting point of 30 to 100 ° C. H type strength of 0.1kg / c
m ² or more;

[Chemical 1] (In the above formulas, R ¹ and R ² are alkyl groups, and R ^a
Is an alkylene group or a phenylene group, R ^b is an alkylene group with or without branching, and m, n
Indicates the number of repeating units)

Urethane containing a terminal isocyanate group is prepared by reacting a polyol having a molecular weight of 1000 to 8000 and a diisocyanate compound disclosed in JP-A-3-59084 so that the NCO / OH ratio becomes 1.6 to 3.0. A prepolymer is obtained, having a molecular weight of 1000-600.
A thermoplastic saturated polyester polyol having a melting point of 50 ° C or higher and a glass transition point of 10 ° C or higher has an NCO / OH ratio of 0.
A block type polymer polyol is obtained by reacting so as to be 3 to 0.8, and a mixed polyol obtained by adding a polyol having a molecular weight of 8000 or less to the diisocyanate compound has an overall NCO / OH ratio of 1.6 to 3.0. To obtain the block type terminal isocyanate group-containing urethane prepolymer (A) and the terminal isocyanate group containing urethane prepolymer (B) in a mixed state, and among the one-pack type urethane sealant containing these, H before curing
Mold strength of 0.1kg / cm ² or more;

The molecular weight of 1,000 to 8 disclosed in the above publication.
NCO with 000 polyols and diisocyanate compounds
/ OH ratio of 1.6 to 3.0 to react to obtain a terminal isocyanate group-containing urethane prepolymer, which has a molecular weight of 1000 to 6000, a melting point of 50 ° C or higher, and a glass transition point of 10 ° C or higher. The saturated polyester polyol is reacted so that the NCO / OH ratio becomes 0.3 to 0.8 to obtain a block-type polymer polyol, to which the diisocyanate compound has an NCO / OH ratio of 1.6 to.
A block type terminal isocyanate group-containing urethane prepolymer (A) obtained by reacting so as to be 3.0,
A terminal isocyanate group-containing urethane prepolymer (B) obtained by separately reacting a polyol having a molecular weight of 8000 or less and a diisocyanate compound with an NCO / OH ratio of 1.6 to 3.0 has a ratio of 10:90 to 90:10. A one-pack type urethane sealant containing a mixture mixed in a weight ratio and having a H-type strength before curing of 0.1 kg / cm ² or more;

The molecular weight of 1,000 to 6 disclosed in the above publication.
000, melting point 50 ° C. or higher, glass transition point 10 ° C. or higher, thermoplastic saturated polyester polyol and diisocyanate compound are reacted so that NCO / OH ratio is 1.6 to 3.0, and terminal isocyanate group-containing urethane prepolymer And a block type terminal isocyanate group-containing urethane prepolymer (A) obtained by reacting with a polyol having a molecular weight of 1000 to 8000 so that the NCO / OH ratio becomes 1.6 to 3.0, and a molecular weight of 8000 separately. The following polyol and diisocyanate compound are NCO / O
Terminal isocyanate group-containing urethane prepolymer (B) obtained by reacting so that the H ratio becomes 1.6 to 3.0
Of the one-pack type urethane sealant containing a mixture of 10:90 to 90:10 by weight, H before curing
Those having a mold strength of 0.1 kg / cm ² or more;

As a reactive hot melt type sealant, a urethane prepolymer containing a polyisocyanate and a mixed polyol of a hydroxyl group-terminated hydrocarbon polyol and polyoxybutylene glycol, which is disclosed in Japanese Patent Laid-Open No. 1-284577. Among urethane sealants containing a polymer, a thermoplastic block copolymer and / or a modified block copolymer thereof, and a tackifier composed of a rosin derivative having an acid value of 5 or less and a hydroxyl value (OH value) of 35 or less, H-type strength before hardening of 0.1kg / cm ² or more;

A first polyester-based polyurethane prepolymer having a glass transition temperature higher than room temperature and a second polymer or polyurethane prepolymer having a glass transition temperature lower than room temperature, as disclosed in JP-A-2-182774. Among urethane sealants composed of a mixture of at least two polyurethane prepolymers characterized by a polymer, those having an H-shaped strength before curing of 0.1 kg / cm ² or more;
Is prepared from linear or branched polyethers having a molecular weight of less than 1000, such as propylene oxide, polyethylene oxide, polyoxybutylene or copolymers thereof, while the second prepolymer is a linear prepolymer having a molecular weight of 1000 or more. Or branched polyethers such as propylene oxide, polyethylene oxide, polyoxybutylene or their copolymers.

Further, as a hot-melt type sealant, it is disclosed in JP-A-3-188183.
Among sealants containing only butyl rubber as a base polymer and containing a tackifying resin, which is a copolymer of terpene and bisphenol A, in an amount of 1/5 to 5 times by weight that of the base polymer, the H-type strength before curing is 0.1. More than 1kg / cm ² ;

[0024] As disclosed in the same publication, butyl rubber and other polymers are contained as a base polymer, and the butyl rubber accounts for 1/6 or more of the total weight of the base polymer and is a copolymer of terpene and bisphenol A. Of the sealants containing the tackifying resin in an amount of 1/30 to 5 times the weight of the base polymer, those having an H-type strength before curing of 0.1 kg / cm ² or more;

In the bonding method of the present invention, among these various sealants, the H type strength before curing is 0.1 kg / c.
A material having a size of m ² or more is used as the sealant 14. In addition,
The H-type strength of the sealant 14 is preferably 0.3-5.
It is about 0 kg / cm ² . By setting the H-type strength of the sealant 14 in the above range, the bonding workability, the bonding strength between the window glass 10 and the body 12 after bonding, the prevention of the displacement of the window glass,
A desirable result is obtained in terms of preventing the window glass from floating by opening and closing the door.

In the bonding method of the present invention, after the sealant 14 is thus filled in the gap between the window glass 10 and the body 12, a molding 18 is attached if necessary.
The surroundings are cleaned and the work of adhering the window glass 10 and the body 12 is completed. Here, in the bonding method of the present invention,
When the bonding process is completed, the window glass 10 and the body 12
Since they are adhered with a sufficient adhesive force, they can be immediately transported outside the factory or transferred to another process.

Although the vehicle window glass bonding method of the present invention has been described above in detail, the present invention is not limited to this, and various improvements and changes can be made without departing from the scope of the present invention. Of course it's good.

[0028]

EXAMPLES The present invention will be described in more detail below by showing specific examples of the present invention. [Example] Three types of heat-applied adhesives (sealants) A, B, and C were prepared as follows.

First, the following urethane prepolymer and polyurethane compound were prepared.

Urethane Prepolymer (A-1) 57 parts by weight of polyoxypropylenetriol having an average molecular weight of 5000 and having 3 hydroxyl groups, and 23 parts by weight of polypropylene ether diol having an average molecular weight of 2000 and having 2 hydroxyl groups are placed in a reaction vessel. 110 ° C, 50 mmHg
After dehydration under reduced pressure for 2 hours, cool to 80 ° C.
9.1 parts by weight of a mixture of 4-tolylene diisocyanate and 2,6-tolylene diisocyanate (80:20) was added with stirring, and the reaction was continued until the free isocyanate was 2.2%. )
A prepolymer was obtained. Then, to this TDI prepolymer was added diphenylmethane-4,4'-diisocyanate 1
After adding 9.6 parts by weight and stirring, 85 parts by weight of polyoxypropylenetriol having an average molecular weight of 5,000 and 35 parts by weight of polypropylene ether diol having an average molecular weight of 2000, which had been dehydrated in advance, were added, and free isocyanate was 1.8 at 80 ° C. % Until diphenylmethane-
A urethane prepolymer (A-1) was obtained without using 4,4'-diisocyanate (MDI) prepolymer.

Polyurethane compound (B-1) 100 parts by weight of polytetramethylene ether diol having an average molecular weight of 1000 was placed in a reaction vessel at 110 ° C. and 50 mmH.
After dehydration under reduced pressure for 2 hours with G, the mixture was cooled to 80 ° C., and 33 parts by weight of hexamethylene diisocyanate was added thereto with stirring, and the reaction was carried out until the free isocyanate was 6.2%. 30 parts by weight of n-hexyl alcohol was added to the reaction product, and the reaction was continued until free isocyanate was absent. Then, excess alcohol was separated and removed to obtain a polyurethane compound (B-1).

Polyurethane compound (B-2) Polycaprolactone diol 10 having an average molecular weight of 2000
0 parts by weight was dehydrated under reduced pressure in a reaction vessel at 110 ° C. and 50 mmHG for 2 hours, then cooled to 80 ° C., and 17 parts by weight of hexamethylene diisocyanate was added thereto with stirring, and the free isocyanate was 3.6%. Reacted. 15 parts by weight of n-hexyl alcohol was added to the reaction product, and the reaction was continued until free isocyanate disappeared, and then excess alcohol was separated and removed to obtain a polyurethane compound (B-2).

[Preparation of Sealant] Sealant A Plasticizer obtained by placing 85 parts by weight of the above urethane prepolymer (A-1) and 5 parts by weight of polyurethane compound (B-2) in a kneading machine container containing nitrogen and further dehydrating it. 20 parts by weight,
100 parts by weight of dry carbon black and 10 parts by weight of dry calcium carbonate were added and sufficiently kneaded under reduced pressure. Thereafter, 1.7 parts by weight of a 5% dioctyl tin dilaurate solution of dioctyl tin dilaurate was added, and the mixture was sufficiently kneaded under reduced pressure to obtain a sealant A.

Sealant B 85 parts by weight of the above-mentioned urethane prepolymer (A-1) and 8 parts by weight of the polyurethane compound (B-1) were placed in a kneading machine container containing nitrogen and further dehydrated 20 parts by weight of a plasticizer,
100 parts by weight of dry carbon black and 10 parts by weight of dry calcium carbonate were added and sufficiently kneaded under reduced pressure. Thereafter, 1.7 parts by weight of a 5% solution of dioctyltin dilaurate in dioctyl phthalate was added, and the mixture was sufficiently kneaded under reduced pressure to obtain a sealant B.

Sealant C 100 parts by weight of the above urethane prepolymer (A-1) was placed in a kneading machine container containing nitrogen and further dehydrated, 20 parts by weight of plasticizer, 100 parts by weight of dry carbon black, 10 parts by weight of dry calcium carbonate. Parts, and kneaded thoroughly under reduced pressure. Then, 1.7 parts by weight of a 5% dioctyltin dilaurate solution of dioctyltin dilaurate was added, and the mixture was sufficiently kneaded under reduced pressure to obtain a sealant C. The H-type strength of each sealant is shown in Table 1 below.

Using the above three kinds of sealants, FIG.
The window of the tailgate of a small passenger car was adhered by the method of the present invention shown in FIG. That is, first, the window glass 1
0 and the body 12 to be adhered are cleaned with isopropyl alcohol, then the dam 16 is adhered with a double-sided tape, and an isocyanate-based primer (M-300 for body, glass G-2 for glass) as a primer is adhered to the adhered part.
00, manufactured by Yokohama Rubber Co., Ltd.), and then the window glass 10 was held at a predetermined position with respect to the body 12 as shown in FIG. The window glass 10 was held by a clip installed on the body.

In this state, each sealant was filled in the gap between the window glass 10 and the body 12 for adhesion. The adhesion was performed by heating all of the sealants A to C to 60 ° C. and injecting and filling each of the sealants in the gap between the window glass 10 and the body 12 with a discharge gun. The entire circumference of the tailgate (window glass) is 3200 mm, and the size of the adhesive is 8 width
The thickness was 10 mm and the thickness was 5 to 7 mm.

In this way, the window glass 10 and the body 12
After adhering and leaving for 10 minutes, the force required to remove the window glass 10 (press from the back surface) and the force required to move the window glass 10 in the lateral direction by 2 mm (glass slippage) were measured. Moreover, the window glass 10 and the body 12 are bonded by the conventional bonding method using each sealant, that is, the direct glazing shown in FIG. 3, and the window glass mounting pressure (mounting pressure) required at that time is also measured. did. The results are shown in Table 1 below.

[0039] In addition, in Table 1 above, "improper" in the mounting pressing force of Invention Example 2 indicates that the window glass 10 could not be pressed to a predetermined position.

As is clear from Table 1 above, according to the window glass bonding method of the present invention, it is possible to quickly obtain sufficient bonding strength between the window glass 10 and the body 12 after bonding. Moreover, in the conventional direct glazing, the H-type strength is 0.
When using one or more sealants, a very large pressing force is required, and particularly when a sealant having a high H-type strength (sealant B) is used, the window glass 10 and the body 12 are bonded in a predetermined state. However, according to the window glass bonding method of the present invention, the window glass can be easily bonded even if such a sealant having a high H-type strength is used. From the above results, the effect of the present invention is clear.

[0041]

As described in detail above, according to the method for adhering a window glass of the present invention, by melting the sealant (adhesive) and utilizing the injection or the like, the window glass and the body can be easily and quickly attached. Can be adhered. Moreover, since the H-type strength of the sealant before curing is 0.1 kg / cm ² or more, it is possible to quickly obtain sufficient adhesive strength after bonding the window glass and the body, and the bonding process between the window glass and the body can be performed. This can be performed at the end of the vehicle assembling step and the vehicle can be moved to the outside of the factory immediately after the bonding step, so that the vehicle assembling efficiency can be significantly improved.

[Brief description of drawings]

1 (a), (b) and (c) are conceptual diagrams for explaining a window glass bonding method of the present invention.

FIG. 2 is a conceptual diagram for explaining H-type strength.

FIG. 3 is a conceptual diagram for explaining a conventional window glass bonding method.

[Explanation of symbols]

 10,100 Window glass 12,102 Body 14,104 Sealant 16,106 Dam 18,108 Mall

Claims (1)

[Claims] 1. A heat-applying type in which a window glass for a vehicle is held at a predetermined position with respect to a vehicle and an H-shaped strength before curing is 0.1 kg / cm ² or more between the vehicle and the window glass for the vehicle. A method for adhering a window glass for a vehicle, which comprises filling with an adhesive.