JP2002121475A - Solvent-free type glass run coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solvent-free type glass run coating not containing a solvent. SOLUTION: This solvent-free type glass run coating for automobiles, characterized by consisting essentially of one or more active hydrogen group-containing components, powder, a lubricating oil such as a non-reactive silicone, and a polyfunctional isocyanate as a curing agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solventless glass-run paint for automobiles.

[0002]

2. Description of the Related Art With regard to window frames for automobiles, glass must be able to open and close slidably. Therefore, a glass run in which a urethane paint is applied to a glass contact portion of a rubber weather strip is used. As a condition required for a glass run used in an automobile, many performances such as abrasion resistance, lubricity, and non-sticking property are required as well as weather resistance, heat resistance, and water resistance.

At present, glass-run paints containing a large amount of solvents (toluene, MEK, etc.) are used to satisfy these required performances.

[0004]

In recent years, there have been laws and regulations such as VOC, PRTR and carbon dioxide emission standards from the viewpoint of protection of the global environment, and the use of solvents has been reviewed from the viewpoints of ozone destruction and photochemical smog. I have.

[0005] In addition, there are many problems in the use of solvents from the viewpoint of occupational safety and health, such as the danger of fire during the production and use of paints and the effect on the human body due to the inhalation of solvents. desirable.

[0006] In view of the above points, the present inventors have improved the problems that occur when using a solvent without using a solvent and using a solvent, and as a result of repeated studies such as physical property tests, the results show that A component containing at least one active hydrogen group, powder,
It has been found that the combination of a lubricating oil such as a non-reactive silicone and a polyfunctional isocyanate, which is a curable component, can provide physical properties higher than the performance of the solvent-based glass run, thereby completing the present invention. It is a thing.

[0007]

The solvent-free glass-run paint according to the present invention comprises a component containing one or more active hydrogen groups in a molecule, a powder, a lubricating oil such as a non-reactive silicone, and the like. The curable component contains four components, which are a polyfunctional isocyanate, as essential components.

[0008]

Embodiments of the present invention will be described below.

[0009] The solvent-free glass-run paint according to the present invention comprises:
The essential component is a component containing one or more active hydrogen groups in the molecule, a powder, a lubricating oil such as a non-reactive silicone, and a polyfunctional isocyanate as a curable component. is there.

Examples of the active hydrogen-containing component include polyester polyols and polyether polyols having one or more hydroxyl groups in the molecule, active hydrogen group-containing compounds having a siloxane structure, and diene compounds having an active hydrogen group. The hydride alone or a blend thereof. Examples of active hydrogen containing components include:
In the case of a polyol having one or more hydroxyl groups in the molecule, the molecular weight is desirably 300 to 10,000 (preferably 400 to 6000). Here, the reason why the molecular weight is set to 300 to 10,000 is that when the molecular weight is less than 300, the viscosity of the prepared coating material becomes low, the film thickness cannot be secured in the working process, and the molecular weight is 10,000.
This is because it is difficult to obtain a liquid polyol in the case where the ratio exceeds the above range. Specifically, polyester polyols include ethylene glycol, butylene glycol, condensation polyester polyol of methylpentanediol and adipic acid and phthalic acid (iso, para), polycaprolactone polyester polyol, polycarbonate diol, castor oil type or castor oil. Oil-modified diene-based polyols and the like can be mentioned.

The polyether polyols include:
Polyoxyethylene glycol, polyoxypropylene glycol, polytetramethylene ether glycol,
Bisphenol ether glycol and the like can be mentioned.

Other than these, compounds containing active hydrogen groups such as silicon diamine, silicon diol and polysulfide, and other diene compounds include polyisoprene, polybutadiene, polychloroprene containing one or more hydroxyl groups in the molecule. , Polyacrylonitrile butadiene copolymer, polystyrene butadiene copolymer, polystyrene isoprene copolymer or a hydride thereof can also be used as the active hydrogen-containing component.

As the powder, silicone powder, fluorine powder, nylon powder, polyethylene powder, polypropylene powder, polyester powder, polycarbonate powder, urethane powder,
Acrylic powder, aluminosilicate powder, calcium carbonate powder and the like can be mentioned. The mixing ratio of the powder is 10 to 1 with respect to 100 parts by weight of the active hydrogen-containing component.
00 parts, preferably 20 to 70 parts. here,
The ratio of powder to be 10 to 100 parts is 10
If the amount is less than 70 parts, the strength becomes insufficient, and if it exceeds 70 parts, a problem occurs in the flexibility of the coating film.

Examples of the lubricating oil include silicone oil and fluorine oil. The mixing amount is 1 to 50 parts, preferably 5 parts by weight, per 100 parts by weight of the active hydrogen-containing component.
-30 parts is desirable. Here, the amount of the lubricating oil is
The reason why the amount is 1 to 50 parts with respect to 100 parts by weight of the active hydrogen-containing component is that if less than 1 part, lubricity cannot be obtained, and if more than 50 parts, the adhesion is lowered, and problems such as stickiness of the coating film occur. is there.

The isocyanate includes tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and isophorone diisocyanate (IPD).
I), naphthalene diisocyanate (NDI), xylylene diisocyanate (XDI), hexamethylene diisocyanate (HDI), hydrogenated MDI, hydrogenated XDI, or their trimethylolpropane (TMP) adduct, water adduct, Examples include polyfunctional isocyanates such as trimers, polymeric MDI, and the like. It is desirable to use the compounding ratio in a molar ratio of NCO / active hydrogen group of 1.0 to 3.0. Here, the reason that the molar ratio of NCO / active hydrogen group is in the range of 1.0 to 3.0 is that if the molar ratio of NCO / active hydrogen group is less than 1.0, the coating film is not formed well, If it exceeds 3.0, the flexibility of the coating film is impaired.

The present invention does not prevent the addition of additives such as a catalyst, a dispersant and an antifoaming agent, and coloring agents such as dyes and pigments, in addition to the above four components.

Hereinafter, specific examples of the present invention (examples of the present invention)
The present invention is described below with reference to the following examples of the present invention (FIG. 1).
Reference). Unless otherwise specified, “parts” means “parts by weight”. <Example 1 of the present invention> P-2000, 100 was added to a planetary mixer.
Parts, additives, 0.3 parts, carbon black MA-100, 3 parts, KM
Charge with 60 parts of P-590 and 10 parts of TSF-451-10M, stir for 60 minutes to be uniform, and then perform degassing under reduced pressure. After defoaming, return to normal pressure.

The obtained paint has a viscosity of 50 Pa · s and a hydroxyl value of 3
It was a black viscous liquid having a water content of 1.0 and a moisture content of 0.3%. <Inventive Example 2> A coating material was prepared in the same manner as in Inventive Example 1. The obtained paint was a black viscous liquid having a viscosity of 30 Pa · s, a hydroxyl value of 30.8 and a water content of 0.2%.

Immediately before coating, a mixture was prepared by adding and mixing the component B. As a comparative example, a solvent-based paint was used.

[0020]

[Table 1] The coatings (compositions) of Examples 1 and 2 of the present invention and the comparative example thus obtained were applied to a glass sliding surface of an automobile glass run (manufactured by Kinugawa Rubber Co., Ltd.) with a bar coater so as to have a thickness of 30 μm. After heat treatment for 10 minutes and curing, abrasion resistance, fixability, and lubricity (coefficient of friction) were measured. In addition, the comparative example is
A primer obtained by adding 5 parts of a curing agent F-1 to Primer SL8861 of Sakai Chemical Industry Co., Ltd., which is effective for a low-unsaturated base material, is brush-applied and immediately spray-coated to a dry film thickness of 30 μm. After drying at a temperature of 150 ° C. for 3 minutes, a heat treatment was carried out at a temperature of 150 ° C. for 7 minutes to cure.

The results of measuring the surface condition of the weather strips obtained by Examples 1 and 2 of the present invention and Comparative Example are shown in Table 2 below.

The measuring method is as follows. 1. Preparation of base material A test piece is applied to the weather strip under the above conditions and cured. 2. Abrasion resistance (1) With the glass sliding surface of the test piece facing upward, a load of 3 kg is applied to the glass contact surface, and the measuring instrument is operated at 60 times / min. (2) The number of times until the substrate is exposed is measured. 3. Adhesive force (1) Cut the above test piece into 5 x 50 mm and attach it to both ends of the specially coated sheet metal with double sided tape with the test surface up. (2) Set the test surface on the cleaned exclusive glass plate.
At this time, water is contained between the glass plate and the test surface. (3) Heat for 60 minutes in a constant temperature drier at 80 ° C. and then cool.

The force of peeling the rubber substrate from the glass surface is measured. (4) Coefficient of friction The coefficient of friction is measured using the above test piece.

(Measuring machine: Surface measuring machine HE manufactured by Shinto Kagaku Co., Ltd.)
(IDON-14D-ANL)

[0025]

[Table 2] For the solventless glass run and the solvent type, the relationship between the wear resistance, the fixing force, the static friction coefficient and the dynamic friction coefficient is as follows:
The results are shown in Table 2. That is, the non-solvent type has abrasion resistance about 3000 times higher than the solvent type,
The fixing force is reduced by 1.5 to 2N and the dynamic friction coefficient is not changed, but the static friction coefficient is reduced by about 0.1, which indicates that all are good.

As a result, Examples 1 and 2 of the present invention in which no solvent was blended were obtained.
Is better than the solvent-based comparative example.

[0027]

The present invention is embodied as described above, and has the following effects.

The solvent-free glass-run paint according to the present invention comprises:
Compared to solvent-based ones, ensure more physical properties,
It is possible to improve the working environment at the glass-run paint manufacturing site and at the coating site in an automobile manufacturing plant.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Harumi Hara 3-1-26 Oikecho, Suma-ku, Kobe-shi, Hyogo Inside Sakai Chemical Industry Co., Ltd. (72) Inventor Isao Fukuyama 3 Oikecho, Suma-ku, Kobe-shi, Hyogo No. 1-26 Sakai Chemical Industry Co., Ltd. (72) Inventor Yukichi Miyama 330 Kinagagawa Rubber Industry Co., Ltd. CG002 DD002 DE002 DG002 DG111 DG131 DG181 DG191 DG221 DG271 DG281 DG291 DH002 DL032 HA286 HA462 JA11 JB18 JC30 KA03 KA07 KA20 MA02 NA03 NA04 NA09 NA10 NA11 NA14 PB07 PC07

Claims (1)

[Claims] 1. A composition comprising a component containing one or more active hydrogen groups in a molecule, a powder, a lubricating oil such as a non-reactive silicone, and a polyfunctional isocyanate as a curable component.
Solvent-free glass run paint characterized by including a component as an essential component.