JP3073125U - Automotive window glass holder - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide an automotive window glass holder which is inexpensive in manufacturing cost, has a high adhesive effect, and can be downsized. SOLUTION: An automotive window glass holder 3 having a U-shaped groove 2 for inserting and nipping an automotive window glass 1 is provided.
Is manufactured using a resin material containing glass fiber in the natural grade of polybutylene terephthalate resin or the natural grade of the polybutylene terephthalate resin. 1. A silane coupling agent is contained in a groove 2 of a window glass holder 3 for an automobile manufactured using a resin material containing glass fiber in a grade.
The structure was such that the vehicle window glass holder 3 and the vehicle glass 1 were bonded via the liquid type urethane adhesive 4.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a vehicle window glass holder and a vehicle window glass holder that sandwiches the vehicle window glass so that the vehicle window glass holder can be attached to an elevating device or the like with a screw or the like like a vehicle window glass.

[0002]

[Prior art]

 As a structure for sandwiching an automotive window glass, an automotive window glass holder structure using an adhesive has been known. In the automotive window glass holder structure, a polyacetal resin or a polybutylene terephthalate resin containing glass fiber is used for an automotive window glass holder that conventionally holds an automotive window glass, and the automotive window glass side and After applying a primer to the side of the window glass for automobiles and the side of the window glass holder (resin) for automobiles, use a one-part urethane adhesive or a one-part silicone adhesive that does not contain a silane coupling agent and a two-part mixed silicon. Was glued.

For example, a domestic automobile manufacturer has used a structure in which a primer is applied to a window glass holder (resin) side of an automobile and then bonded using a one-liquid silicone adhesive. Other manufacturers apply a primer to both the window glass side of the car and the window crow holder (resin) side of the car and then bond them with a one-component urethane adhesive. A structure was used in which a primer was applied to the window glass holder (resin) side and then bonded using a two-liquid silicone adhesive.

[0004]

[Problems to be solved by the invention]

 In the structure of a window glass holder for automobiles, the window glass for automobiles and the window glass holder for automobiles are bonded, but it is generally said that glass is a material that is difficult to bond. When installing automotive window glass, it was necessary to use a primer to ensure the adhesive strength of the automotive glass holder structure. The use of a primer requires a primer application step, a drying step, and an inspection step, and also requires the management of primers.The structure that improves the adhesive strength using primers requires a long time to solidify the adhesive. However, it took time and effort to position the bracket, which also increased costs.

[0005] Furthermore, the work of applying the primer has a bad working environment due to the odor of the vaporized gas, which has been a factor of lowering the working efficiency. An object of the present invention is to provide an automotive window glass holder that holds an automotive window glass that is inexpensive to manufacture, has a very high adhesive effect, and allows the mounting components to be downsized.

[0006]

[Means for Solving the Problems]

 In the present invention, when bonding an automotive window glass and an automotive window glass holder, strong adhesion can be obtained without requiring any glass primer or resin primer. That is, an automotive window glass holder 3 having a U-shaped groove 2 for inserting and sandwiching the automotive window glass 1 is made of a glass fiber of a natural grade of polybutylene terephthalate resin or a natural grade of the polybutylene terephthalate resin. A window glass holder for an automobile manufactured using a resin material containing natural fibers of this polybutylene terephthalate resin or a natural grade of the polybutylene terephthalate resin containing glass fibers. The structure is such that the vehicle window glass holder 3 and the vehicle glass 1 are bonded to each other through a one-component urethane adhesive 4 containing a silane coupling agent in the groove 2 of the vehicle.

[0007]

[Action]

 On the other hand, the surface of the window glass for an automobile, which is the adherend, adsorbs moisture in the air, and the OH groups in the moisture are combined with the alkoxy groups of the silane coupling agent through a dehydration condensation reaction.

[0008] The chemical structure of the polybutylene terephthalate resin forming the windowpane holder for automobiles, which is the other adherend, has a COO group, which is a polar group, and therefore is bonded to urethane bonds in urethane sealants.

The one-part urethane sealant has an isocyanate (NCO) group at a terminal. After the isocyanate groups combine with moisture in the air, they form urea bonds and cure. Therefore, the vehicle window glass and the vehicle window glass holder are quickly and firmly adhered to each other by the urethane sealant to which the silane coupling agent is added.

[0010]

【Example】

 FIG. 1 is an explanatory view of the bonding between the vehicle window glass and the vehicle window glass holder according to the present invention. The vehicle window glass 1 is sandwiched between U-shaped grooves 2 formed in the vehicle window glass holder 3 and firmly adhered by an adhesive 4. The automotive window glass holder 3 is formed of a natural resin grade of polybutylene terephthalate resin having a COO group which is a polar group or a composite resin containing glass fiber in the natural grade of polybutylene terephthalate resin. As the adhesive 4, a one-pack type urethane adhesive containing a silane coupling agent is used.

The polybutylene terephthalate constituting the window glass holder 3 for automobiles and the urethane sealant constituting the adhesive 4 are represented by the formula

Embedded image As shown in the formula, the COO group, which is a polar group, and the urethane bond in the urethane sealant are connected, and the adhesive 4 is firmly applied to the inner surface of the groove 2 of the window glass holder 3 for automobiles.

Next, the attachment of the urethane sealant containing the silane coupling agent to the window glass 1 for an automobile will be described. The silane coupling agent added to the one-part type urethane sealant at a ratio of 5% by weight or less is represented by the formula

Embedded image As shown in (1), the terminal consists of an organic functional group (X) and an alkoxy group (OR) extending from a silicon atom (Si).

The bonding between the window glass 1 for an automobile as an adherend and the silane coupling agent is represented by the formula

Embedded image As shown in FIG. 1, the surface of the window glass 1 for automobiles has a small amount of moisture in the air adsorbed thereon, and the OH groups in the adsorbed water and the silane coupling agent added to the one-part urethane sealant. The alkoxy group is siloxanized and bonded through a dehydration condensation reaction. Therefore, the one-component urethane sealant is firmly applied to the surface of the window glass 1 for an automobile via the silane coupling agent.

As described above, the one-component urethane sealant to which the silane coupling agent has been added is provided on both the surface of the vehicle window glass 1 and the vehicle window glass holder 3 that holds the vehicle glass 1 and the groove 2. It will be firmly adhered. Furthermore, since the one-part urethane sealant has an isocyanate (NCO) group at the terminal, it generates carbamic acid having moisture in the air and a bound amine group. The amine group is urea-bonded to the urethane sealant not yet bound to moisture and hardens.

[Effect of the invention]

 As described above, the structure for sandwiching the window glass for an automobile according to the present invention is such that the automobile window glass 1 and the automobile window glass holder 3 can be more firmly joined without using any glass primer or resin primer. It is. In addition, the use of the primer has shortened the curing time of the adhesive, which has been long. Therefore, (1) Abolishment of the primer on the side of the window glass for automobiles and the side of the window glass holder (resin) for automobiles. (2) Elimination of the primer application process, drying process, inspection process and equipment. (3) Abolition of primer management. (4) Improve market reliability by increasing strength. (5) Increased adhesive strength (especially creep force), stabilization of quality due to reduction in unevenness of adhesive strength, and reduction of defective rate. (6) Parts can be downsized by increasing the adhesive strength. (7) The bonding area can be reduced by increasing the bonding strength. (8) The working environment is improved by eliminating odor by eliminating the primer coating process. The economic effect is large.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the bonding between a vehicle window glass and a vehicle window glass holder according to the present invention.

[Explanation of symbols]

 1-Automotive window glass 2-Groove 3-Automotive window glass holder 4-Adhesive

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiko Takeuchi 3031 Hara on Kamiyoji, Atsugi City, Kanagawa Prefecture Inside Hori Glass Co., Ltd.

Claims (2)

[Utility model registration claims] 1. An automotive window glass holder 3 having a U-shaped groove 2 into which an automotive window glass 1 is inserted and clamped.
Is manufactured using a resin material containing glass fiber in the natural grade of polybutylene terephthalate resin or the natural grade of the polybutylene terephthalate resin. 1. A silane coupling agent is contained in a groove 2 of a window glass holder 3 for an automobile manufactured using a resin material containing glass fiber in a grade.
An automotive window glass holder characterized by a structure in which the automotive window glass holder 3 and the automotive glass 1 are bonded together via a liquid type urethane adhesive 4. 2. A window glass holder for an automobile, wherein the one-component urethane adhesive 4 according to claim 1 is added with a silane coupling agent.