JP2927258B2 - Surface treatment agent for weather strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a surface treatment agent,
Automobiles and other vehicles, buildings, in the case like, is applied to Uezasutori' flop glass is used in locations where sliding, but according to the surface treatment agent to lower the dynamic friction resistance.

[0002]

2. Description of the Related Art A weather strip used for a door glass door of an automobile will be described as an example. The weather strip is provided with a mounting portion for fixing to a door panel,
And a sealing portion for sealing between the sliding door glass and a sliding portion of the sealing portion which is in contact with the door glass, and flocked to reduce sliding resistance of the door glass. Many have been done.

[0003]

However, since the above flocking is generally made of nylon and has almost no water repellency, if the flocking is provided with rainwater, washing water, dew water or the like (hereinafter referred to as rainwater, etc.). The rainwater and the like penetrated between the flocks and accumulated. Therefore, if this rainwater freezes during cold weather, the door glass freezes on the weather strip,
There was a problem that it was difficult or impossible to raise and lower the door glass.

Therefore, various studies have been made on measures for preventing the freezing, but no measures have been practically adopted. For example, if water-repellent silicone oil (dimethylsiloxane) is applied to the flocking, it is only possible to prevent freezing, but since the silicone oil is free silicone having no reactive groups, the door glass that moves up and down Transfer to an oil film, which deteriorates the view through the door glass, and adheres to the occupant's clothes and becomes dirty, so that practical application was impossible.

As described above, the flocking is intended to reduce the sliding resistance of the door glass. However, the flocking without applying the silicone oil cannot always sufficiently reduce the sliding resistance. Further, it has been required to further reduce the dynamic friction resistance.

[0006] The above problem is not limited to the flocking of the weather strip , but is the same as long as the surface of the sliding contact portion of the weather strip .

An object of the present invention is to solve the above problems, by applying the Uezasutori' flop, or it is possible to prevent freezing, novel useful surface capable or reducing the dynamic friction resistance of the sliding portion It is to provide a processing agent.

[0008]

Means for Solving the Problems In order to achieve the above object, a surface treatment agent for a weather strip of the present invention comprises a reactive silicone and a fine powder of a polycarbonate resin having an adhesive property to the reactive silicone. Ri vegetables contain,
The size of the fine powder is about 1 to 5 μm in diameter,
The content of the fine powder is 100% by weight of the main ingredient of the reactive silicone.
2 to 18 parts by weight per part.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Details of main components of the means will be described. (1) About reactive silicone

(1-1) Examples of the main components of the reactive silicone before the condensation reaction curing include the following, and those exemplified in JP-B-56-19813 can also be used. it can. Main agent A mixed polysiloxane of diorganopolysiloxane and hydroxyl-dienesiloxane closed at both ends. As the organic group, an alkyl group, an alkenyl group, an aryl group,
Aralkyl groups and the like. Catalyst: A catalyst that promotes curing of the base material. Organotin compounds, platinum, platinum compounds, etc. Solvent: A diluent for adjusting the reactive silicone to a viscosity with good workability of application to the application surface such as flocking. n-hexane, n-heptane, toluene, isopropyl alcohol, butyl alcohol, methyl alcohol, ethyl alcohol, 1.1.1-trichloroethane, trichloroethylene and the like.

(1-2) Examples of the additives to the reactive silicone include the following. Coupling agent: It enhances the adhesiveness of the reactive silicone to the application surface such as flocking. γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-
Silane coupling agents such as chloropropyltrimethoxysilane, γ-chloropropylmethyldichlorosilane, γ-chloropropylmethyldimethoxysilane, and titanate coupling agents. UV-shielding pigment: Prevents UV-deterioration of the application surface such as the weatherstrip body and flocking. Channel black, acetylene black, oil furnace black, gas furnace black, carbon black such as thermal black, graphite, iron oxide powder and the like. Of these, carbon black is preferred, and channel black is more preferred.

(2) Fine powder The material of the fine powder is a polycarbonate resin having an adhesive property to the reactive silicone. The shape of the fine powder is preferably a sphere, but may be a polyhedron, a piece, a variant, or the like. The size of the fine powder is, for example, in the case of a sphere, a diameter of 1
About 5 μm is preferable. The state of the fine powder contained in the cured film may be a state in which each of the fine powders is independently dispersed, or a state in which a plurality of agglomerates in a tuft form are dispersed.

[0013] The surface treatment agent of the present invention if <br/> coated Uezasutori' flop, the cured film of the reaction cured reactive silicone, exerts a strong water repellency. Further, the cured film of the reactive silicone does not transfer to glass or adhere to clothes. In addition, when the cured film alone is used, the coefficient of kinetic friction with glass is slightly higher than that when the silicone oil is applied (of course, lower than when there is no cured film). The contained fine powder has the effect of lowering the kinetic friction coefficient, which should be high. Further, since the polycarbonate resin having adhesiveness to the reactive silicone is used for the fine powder, the adhesive strength between the reactive silicone and the cured film is increased.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a surface treating agent applied to a weather strip will be described below with reference to the drawings.

First, two lip-shaped seal portions 1 as shown in FIG.
1 and a weather strip 2 having a hollow sealing portion 21 as shown in FIG. 3 were extruded.

[0016]

[Table 1]

Next, sliding contact surfaces 12, 2 of the lip-shaped seal portion 11 and the hollow seal portion 21 with the door glass 3 are provided.
The hairs 13 and 23 were applied to No. 2 via a hair transplanting adhesive.
The flocks 13 and 23 were made of 6-nylon resin and had a thickness of 3 denier (about 20 μm in diameter) and a length of 0.8 mm.

Next, the sliding contact surface 1 of the weather strip 1
2 and the flocking 13 are spray-coated with reactive silicone at a compounding ratio of the components shown in Table 2 excluding only the fine powder, and this is cured by condensation at 90 ° C. for 10 minutes to a thickness of 5 μm. A film was formed by coating, and the weather strip 1 was used as a comparative example.

The sliding contact surface 2 of the weather strip 2
2 and the flocking 23 are spray-coated with a reactive silicone having a compounding ratio shown in Table 2 and then subjected to a condensation reaction curing at 90 ° C. × 10 minutes to form an aggregated fine powder 24 as shown in FIG. A dispersed cured film 25 having a thickness of 5 μm was formed by coating, and the weather strip 2 was used as an example.

[0020]

[Table 2]

The weather strip 1 of the comparative example and the weather strip 2 of the embodiment formed as described above were attached to a door glass elevator (not shown) of an automobile door. Then, water was introduced into the sliding contact surface between the weather strips 1 and 2 and the door glass 3, and after the water was frozen, the door glass 3 was moved up and down. It was easy to move up and down with force. The following items were tested in order to confirm the above effects numerically.

(1) Freezing test Two test pieces of dimensions 25 mm × 10 mm having exactly the same flocked and hardened films as the sliding contact surfaces 12 and 22 of the weather strips 1 and 2 of the comparative example and the example. The test pieces were immersed in water for 30 minutes. And
Water is dropped on a glass plate, each test piece taken out of the water is placed on the glass plate, and left standing in an atmosphere of -15 ° C for 60 minutes to completely freeze the water. The test piece and the glass plate were pulled, and the tensile strength when both were peeled was measured. For comparison, a test piece (coated with silicone oil) corresponding to a conventional example having flocks but having no cured film was also prepared, and the tensile strength was measured in the same manner. FIG. 4 shows the test results.

(2) Dynamic friction coefficient (sliding resistance) test The dimensions of the weather strips 1 and 2 of the comparative example and the example are exactly the same as those of the sliding contact surfaces 12 and 22 as shown in FIG. Two test piece main bodies of 50 mm × 50 mm × 2 mm were prepared, and 1
Specimens 1a, 2a corresponding to each example were implanted at two locations in a range of 0 mm × 50 mm and covered with a cured film.
It was created. Next, after measuring the weight of each of the test pieces 1a and 2a, the test pieces 1a and 2a were set on a fixed horizontal glass plate 4 as shown in FIG. The weight of 1 k is placed on the center of the test pieces 1a and 2a.
The test piece 1a, 2a was pulled horizontally at a pulling speed of 100 mm / min. Test pieces 1a, 2
The maximum load was measured in the range from when a moved 30 mm to when it moved 120 mm. Similar to the freezing test of the above (1), the maximum load was similarly measured for a test piece (silicone oil applied) corresponding to a conventional example having flocks but having no cured film. FIG. 5 shows the test results.

In the above-described embodiment, the following alternatives and modifications can be exemplified. (1) Weatherstrip body The material of the weatherstrip body is EPDM, EP
Rubbers such as M and synthetic resins such as vinyl chloride resins can be exemplified. Further, the shape of the seal portion having a sliding contact surface with the glass is not particularly limited, and examples thereof include a hollow shape, a solid shape, and a lip shape.

(2) Flocking As a flocking material, 6-nylon resin, 6.6-nylon resin, polyester resin and the like can be exemplified. The diameter of the flocking is generally 1 to 10 denier, and preferably 2 to 5 denier. Hair implantation length is 0.4 ~
1.5 mm is common, and 0.6 to 1.2 mm is preferable.

(3) Reactive Silicone Coating Method General-purpose methods such as spray coating, roll coating, dip coating and brush coating can be exemplified. The coating thickness varies depending on the mixing ratio of the solvent and the thickness of the cured film to be formed. The curing conditions of the coating film are usually from 80 to 1
50 ° C. × 5 to 20 minutes.

(4) Reactive Cured Film of Reactive Silicone The thickness of the cured film obtained by condensation reaction curing of the reactive silicone is generally 5 to 20 μm, preferably 7 to 20 μm.
15 μm. If the thickness is less than 5 μm, the durability is poor.

[0028]

Weather strip for surface treatment agent of the present invention according to the present invention, which is configured as described above, Uezasutori' flop
By applying on the surface, freezing can be prevented and dynamic frictional resistance of the sliding contact portion can be reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of flocking to which a surface treatment agent according to an embodiment of the present invention has been applied.

FIG. 2 is a sectional view of a weather strip of a comparative example.

FIG. 3 is a cross-sectional view of the weather strip of the embodiment.

FIG. 4 is a graph showing test results of a freezing test.

FIG. 5 is a graph showing test results of a dynamic friction coefficient test.

FIG. 6 is a bottom view of a test piece used for the dynamic friction coefficient test.

FIG. 7 is a front view showing an outline of the dynamic friction coefficient test.

[Explanation of symbols]

 2 Weather Strip 22 Sliding Contact Surface 23 Flocked 24 Fine Powder 25 Cured Film

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-248860 (JP, A) JP-A-60-174320 (JP, A) JP-A-61-159427 (JP, A) 248860 (JP, A) JK 7-121655 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60J 5/00 C08K 7/16 C08L 69/00 C08L 83/04

Claims (1)

(57) [Claims] To 1. A reactive silicone, Ri Na contain fine powder of a polycarbonate resin having adhesion to the reactive silicone, the diameter 1 the size of the fine powder
About 5 μm, and the content of the fine powder
2 to 18 parts by weight based on 100 parts by weight of the main ingredient
A surface treatment agent for a weatherstrip, comprising: