JPS63182378A - Coating material having excellent wear resistance - Google Patents

Abstract

PURPOSE:To obtain a coating material having excellent wear resistance when muddy water, etc., stick thereto and excellent workability, by mixing a specified polyurethane resin, a polyisocyanate, a fluororesin, MoS2 and a silicone oil. CONSTITUTION:The title coating material is prepared by dissolving or dispersing in a solvent (e.g., acetone) 100pts.wt. polyurethane resin having an NCO to OH ratio of 1-3; 10-1,000pts.wt. polyisocyanate (e.g., phenylene diisocyanate) having 2-5 -N=C=O groups per mol. and a molecular weight of 150-2,000; 10-1,000pts.wt. fluororesin (e.g., polytetrafluoroethylene); 10-1,000pts.wt. MoS2 having a particle diameter of 2mum or smaller; 1-200pts.wt. silicone oil (e.g., a dimethyl silicone oil); and if required, a curing catalyst, a pigment, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a coating material used mainly for automobiles, glass runs, etc., and particularly to a coating material that has excellent wear resistance when muddy water or the like adheres thereto.

■ Prior art and its problems A glass run is a channel-shaped thing inserted into a window frame to guide a glass plate that moves up and down in an automobile door or the like.

The glass run has an appropriate pressing force on the contact surface with the glass plate, suppresses rattling of the glass plate, prevents air and water from entering, and unpleasant noises generated when driving.

Especially in window frames where the glass can be opened and closed freely, it is especially useful as a glass run! Low resistance requires low material.

For this reason, in automobiles, a rubber or resin weather strip is used to fix the window glass and the window frame, and a coating material is applied to the parts where the glass slides.

Coating materials conventionally used on the surface of vinyl chloride resin-based glass run substrates include urethane resins, polyisocyanates, and fluororesins, as disclosed in Japanese Patent Publication No. 57-14986, Japanese Patent Publication No. 33169-1982, and Japanese Patent Publication No. 60-21655. , a composition consisting of a combination of silicone oil has been proposed.

However, these compositions had a problem in that they had poor abrasion resistance when mixed with glass run in muddy water. In addition, it is a two-component type consisting of a base agent and a curing agent, which has poor workability.

(1) Purpose of the Invention The purpose of the present invention is to provide a coating material which improves the drawbacks of the prior art, has excellent abrasion resistance even when muddy water etc. adheres to it, and has good molding workability.

■ Structure of the Invention The present invention is based on a method in which 10 to 10 parts by weight of polyisocyanate is added to 100 parts by weight of polyurethane resin having NC01011 = 1 to 3.
00 parts by weight, 10 to 1000 parts by weight of fluororesin, 10 to 1000 parts by weight of molybdenum disulfide, and 1 to 200 parts by weight of silicone oil.It is a molding composition with excellent wear resistance. We provide coating materials that are

Here, the nf polyisocyanate contains N[
: It is preferable that the number of 0 groups is 2 to 5 and the molecular weight is 150 to 2000.

The configuration of the present invention will be explained in detail below.

The polyurethane resin used in the present invention may be any polymer having a urethane bond and having an NC010il ratio of 1 to 3, but NGO7011 is a reaction product of a polyvalent isocyanate compound and a polyol such as polyether or polyester. Preferably, the ratio is 1-3.

These include Pandix T5205 (Oihon Ink Kagaku Kogyo) and the like.

This is because if the NGO7011 ratio is less than 1, the storage stability will be poor, and if it is 3M, foaming will occur easily.

Polyisocyanates are compounds with polyvalent -N = C = OM, such as phenylene diisocyanate, tolylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate, diphenyl butane diisocyanate, diphenyl ether diisocyanate, naphthalene diisocyanate, tolylene diisocyanate with 1 mole of trimethylpropane. Aromatic polyisocyanates such as ethylene diisocyanate, trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, heptamethylene diisocyanate, trimethylpro, 3 mole adduct of hexamethylene diisocyanate to 1 mole of bread Examples of alicyclic polyisocyanates include cyclohexane-1,4 diisocyanate and the like.

Preferably, in order to improve heat resistance by reacting with moisture in the air, the polyisocyanate contains -N per 1 mole.
=C=0 base number is 2 to 5, molecular weight is 150 to 20
00 polyisocyanate is preferably used.

If the number of -N=C=0 groups per mole is less than 2, curing will be insufficient, and if the number of -N=[:=0 groups is more than 5, the coating material will become brittle. In addition, if the molecular weight is less than 150, curing will be rapid and foaming will occur easily.
This is because if it exceeds 00, curing will be slow.

-N = C = 0 base number is 2 to 5, molecular weight is 150 to 20
00 polyisocyanates include Coronate (Japan Polyurethane Industries), Coronate HL (Japan Polyurethane etc.

Fluororesins are polymers of fluorinated hydrocarbons, and representative examples include polytetrafluoroethylene, polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, polyvinylidene fluoride, and polyvinyl fluoride. can be mentioned.

Preferably, polytetrafluoroethylene is used.

Molybdenum disulfide is a compound represented by MoS2,
A particle size of 2 μm or less is preferable.

Examples of silicone oil include dimethyl silicone oil, methyl chloride silicone oil, methylhydrogen silicone oil, methylphenyl silicone oil,
Fluorosilicone, etc.

The solvents used for dispersing the polyurethane resin, polyisocyanate, fluororesin, molybdenum disulfide and silicone oil of the present invention include acetone, methyl ethyl ketone, methyl isobutyl ketone, benzene, toluene,
Representative examples include xylene, methyl acetate, ethyl acetate, isopropyl acetate, trichloroethylene, 1,1,1-trichloroethane, and dimethylformamide.

The amount of the fluororesin is 10 to 1000 parts by weight per 100 parts by weight of the polyurethane resin having NC010H=1 to 3. 1
If it is less than 0 parts by weight, the abrasion resistance will decrease, and if it exceeds 1000 parts by weight, the adhesiveness will decrease.

The amount of molybdenum disulfide is 10 to 1000 parts. 10 layers! When the amount is less than 11 parts, the wear resistance decreases, and 10 parts
If the amount exceeds 0.00 parts by weight, adhesiveness will decrease.

The amount of silicone oil is 1 to 200 parts by weight.

If the amount is less than 1 part by weight, the abrasion resistance will decrease, and if it exceeds 200 parts by weight, the adhesiveness will decrease.

The amount of polyisocyanate is 10 to 1000 parts by weight per 100 parts by weight of the polyurethane resin of NGO/Ko = 1 to 3. If it is less than 10 parts by weight, curing will be insufficient;
This is because if the amount exceeds parts by weight, foaming will occur.

In the present invention, in addition to the above-mentioned essential components, metal soaps, curing catalysts such as amines, pigments such as carbon, etc. may be added.

The coating material of the present invention is prepared by dissolving and dispersing the above-mentioned polyurethane resin, polyisocyanate, fluororesin, molybdenum disulfide, and silicone oil in a solvent, and - as a liquid level, polyvinyl chloride resin, primer-treated metal, plastic, rubber, etc. It is a coating material that is cured by reacting with moisture in the air.

■　Example This will be explained in more detail below using Examples.

(Example 1 and Comparative Example) Using the raw materials shown in Table 1, coating materials shown in Table 2 were produced, and the following wear test and storage stability test were conducted.

The results are shown in Table 2.

The manufacturing conditions were as follows: The raw materials shown in Table 1 were mixed and dispersed in ethyl acetate at room temperature for 2 days, and the mixture was coated on a glass run substrate.

Table 1 [1] Abrasion test machine Flat abrasion test machine! )Test conditions I! i Screw glass (thickness 3~511Il) Load: 1~3 g Kishi scraper cycle: 60~70 times/min Rubber stroke: 140~150a As shown in Figure 1, the example was applied to the glass run base material 1. And Coating Material 3 of Comparative Example was applied, and the surface coated with this coating material was rubbed with glass PJ Mukuko 2 to perform an abrasion test. The evaluation is JS up to the exposure of the glass run base material! It is shown in m number of times.

2) Test method: Coating material 3 was applied to a soft vinyl chloride resin glass run base material (FIG. 1) to a thickness of approximately 100 μm.

After application, the sample was left in the chamber for 7 days and tested under the conditions of 1).

Alto! ! ! Test B, muddy water test, 0.5~lcc of muddy water was dropped onto the coating surface every 1000 times.

[2] Storage Stability Test The coating materials of Examples and Comparative Examples were placed in a sealed container and left in an atmosphere at 50° C. for 5 days, and then visually observed.

(Example 2 and Comparative Example) In the same manner as in Example 1, coating materials were prepared with the compositions shown in Table 3, and the performance was evaluated based on the difference in urethane resin and ift# of Dismodule IIL.

Table 3 (Example 3 and Comparative Examples) In the same manner as in Example 1, coating materials were prepared with the compositions shown in Table 4, and performance evaluation was performed using variables of molybdenum disulfide.

Table 4 (Example 4 and Comparative Example) In the same manner as in Example 1, a coding material was prepared with the composition shown in Table 5, and the performance improvement f due to the variation of silicone oil was
I did a valuation.

Table 5 ■ Effects of the invention The present invention disperses a fluororesin, molybdenum disulfide, silicone oil, and polyisocyanate in a polyurethane resin to make it a liquid type, resulting in good workability, excellent wear resistance, and especially A coating material for automobile glass run, etc., which has good abrasion resistance when covered with muddy water, can be obtained.

This coating material has excellent adhesion, heat resistance, and weather resistance.
It can also be used as a coating material for primer-treated base materials such as rubber and plastic.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating a wear test. Explanation of symbols 1-Glaslan base material, 2-79 rubbish, 3.-Coating material FIG.1

Claims (2)

[Claims] (1) NCO/OH=1-3 polyurethane resin 100
It must be a one-component composition in which 10 to 1000 parts by weight of polyisocyanate, 10 to 1000 parts by weight of fluororesin, 10 to 1000 parts by weight of molybdenum disulfide, and 1 to 200 parts by weight of silicone oil are dispersed in each part by weight. A coating material with excellent wear resistance. (2) The coating material with excellent wear resistance according to claim 1, wherein the polyisocyanate has a number of NCO groups of 2 to 5 per mole and a molecular weight of 150 to 2,000.