JPS6076561A - Resin composition - Google Patents

Abstract

PURPOSE:A resin composition, obtained by incorporating a thermoplastic elastomer with a silicone oil and ''Teflon'' powder inspecific amounts, having flexibility, low frictional resistance and improved abrasion resistance. CONSTITUTION:A resin composition obtained by incorporating (A) 100pts.wt. thermoplastic elastomer, e.g. styrene, urethane or copolyester, with (B) 1-50pts. wt., preferably 5-20pts.wt. silicone oil and (C) 5-200pts.wt., preferably 10- 30pts.wt. ''Teflon'' powder. The incorporation of the components (B) and (C) enhances the lubricity and reduces the coefficient of friction. USE:Automotive weather strips such as glass runs, glass outers, etc.

Description

Detailed Description of the Invention Technical Field The present invention relates to a resin composition that is flexible, has low frictional resistance, has excellent abrasion resistance, and is difficult to adhere to other members such as glass or painted sheet metal. Generally, automotive weather strips such as glass runs or glass outerwear are made of rubber, soft PVC, or the like. In this case, for the purpose of reducing sliding resistance (friction coefficient), improving wear resistance, and preventing sticking without impairing sealing performance with other parts, nylon short fiber flocking, urethane coating, etc.
Surface treatment such as coating with 1 or silicone paint is performed. However, these methods have complicated processing steps and high equipment costs, resulting in high manufacturing costs, and they do not always provide sufficient product performance. Therefore, instead of flocking or painting, the treatment process was simplified by coating with a resin composition such as polyethylene or thermoplastic urethane, but in either case, the friction coefficient, wear resistance, etc. The adhesion force was not completely satisfied.

Purpose of the Invention The present invention was accomplished in order to eliminate the above-mentioned defects, and its purpose is to provide a resin composition that has a low coefficient of friction, excellent wear resistance, and has low adhesion to other members. It is in.

Structure of the Invention The present invention has been developed by: In order to achieve the object, a resin composition is made of a thermoplastic elastomer with a 100-layer suspension, a hemmer, 1 to 50 parts by weight of silicone oil, and 5 to 200 parts by weight of Teflon powder. constitutes things.

Now, the characteristics, blending amount, etc. of each of the above-mentioned components will be explained.

The thermoplastic Nilastone which is the main component of the resin composition of the present invention includes styrene type, urethane type, copolyester type, nylon type, etc., and the type thereof is not particularly limited.

The elastomer provides good sealing properties with the mating member due to its appropriate flexibility, and the effectiveness of each component as a binder prevents a decrease in wear resistance.

Furthermore, silicone oil has the effect of increasing the lubricity of the resin composition and lowering the coefficient of friction. If the silicone oil is less than 1 part by weight, the lubricity will be poor, and if it is more than 50 parts by weight, the processability will deteriorate, so it is preferably from 5 to 20 parts by weight.

Similarly, Teflon powder also increases lubricity and reduces the coefficient of friction. This effect is small below 5 parts by weight;
If the amount exceeds 0.00 parts by weight, the mechanical strength will be significantly lowered, causing a problem, and 10 to 50 parts by weight is desirable. In addition, this Teflon powder can be used on rubber, resin, metal, etc.
When forming a coating or infiltration on a seed material, it reduces the surface free energy of the resin composition in the molten state (reduces surface tension), improves the biting into the surface of the other material, and improves adhesion (adhesion). It has the effect of "directing".

Effect of the invention - The resin composition of the present invention composed of the above three components,
As is clear from the evaluation results of the examples described later, conventional (
Compared to Comparative Examples 1 to 3), it has a low coefficient of friction, excellent wear resistance, can reduce the adhesion force to other members such as glass, and has the effect of improving the adhesion force to rubber etc. . Therefore, it is suitable for automobile weather strips such as classlan and glass outerwear.

EXAMPLE Next, the present invention will be explained in detail, but before that, the friction coefficient,
Abrasion resistance, adhesion strength, and peeling force when applied to rubber (
The method for measuring adhesion strength will be explained below.

j, zu, The friction coefficient was measured using EPDM with a thickness of 21+10.
Seat 1 in which a coating film 2b having a thickness of 0.3IIIl was formed by coating the surface of the rubber base 2a with a resin composition.
A test piece 2 having a square shape with sides 50a+m from - to - is prepared. Then, as shown in FIG. 1, the rubber base material 2a side of the test piece 2 is adhered to the lower surface of the iron plate 1 with double-sided tape.
The coated film 2b side of the test piece 2 is placed on the upper surface of the glass plate 3, and a load is applied onto the iron plate 1 using the weight 4. And iron plate 1
The wire 5 fixed to the wire 5 is pulled at a speed of 1001 III/min using a Tensilon type tensile tester (not shown). At this time, the sum of the weight W1 of the small size 4, the weight W2 of the iron plate 1, and the weight W3 of the double-sided tape is 1 kg.
is set to be. Note that the upper surface of the glass plate 3 is degreased and cleaned using trichlorethylene every time a measurement is performed.

The abrasion resistance of the resin composition was measured using a pendulum type abrasion tester (not shown).
As shown in FIG.
A ma+ glass abrasion element 6 is used. To conduct an abrasion resistance test using the above testing machine, first, the surface of a crosslinked EPDM rubber sheet is degreased and cleaned, then a primer is applied, and then a resin composition is coated on the top surface to form a coating film with a thickness of 0.31IIl. From 1-150m1ll in length, 10 in width
Prepare a test piece of IllIIl, press the glass plate 6 against the coating side of this test piece, and slide it back and forth with a load of 3 kg (
Stroke 100mm, speed 1 time/5ec), EP
It is measured by 11 times of backward sliding until the DM rubber base material is exposed.

The device for measuring the adhesion force between the resin composition and other members is the third one.
As shown in FIG. 4, the glass fixing jig 7, the glass plate 8 fitted thereto, and the rubber of the test piece 9 (same as the test piece 2) placed on the top surface of the glass plate 8. Iron plate 10 (vertical 60IllI) adhered to the base material 9a side with double-sided tape
11, width 60IIIllI11 thickness 2IIIll),
Furthermore, a tensioning jig 1 is placed on the upper surface of the iron plate 10 and connected to a tensilon (not shown) via a wire 11.
It is composed of 2 and J:ri.

To measure the adhesion force using the above measuring device, first, attach the rubber base material 9a side of the test piece 9 to the iron 1fi with double-sided tape.
Glue to 10. Then, the coating film 9b side of this test piece 9 is brought into contact with the top surface of the glass plate 8 on which water droplets have been dropped, and a 3k (l weight (as shown) is placed on the iron plate 10. In this state, a constant temperature bath at 80° C. Further, after taking it out of the thermostatic chamber and leaving it at room temperature for 30 minutes, the weight is removed and the tension live shellfish 12 is pulled through the wire 11 using Tensilon (the path shown in the figure).At this time, the maximum Load (kQ
) is the adhesion force.

Next, a tensile tester is used to measure the peeling force when the EPDM rubber base material 9a is coated with the resin composition to form the coating film 9b. In this case, test piece 9 is #25
0III111 horizontally 5IIIm, rubber base material 9
Peeling strength (k!I/
c+ll). In addition, when the coating film 9h is broken, a cloth with low elasticity is bonded to the surface of the coating film 9b of the test piece 9 with an adhesive to reinforce it.

Now, Table 1 shows the component formulations of Comparative Examples 1 to 3 and Examples 1 to 3 based on thermoplastic urethane extomers, and blank columns indicate no addition. Moreover, Table 2 shows the evaluation results of Comparative Examples 1 to 3 and Examples 1 to 3.

As is clear from Table 2, Comparative Examples 1 to 3 each do not satisfy all of the four properties of friction coefficient, wear resistance, adhesion force, and peeling force, but Examples 1 to 3 each do not satisfy all of the four properties. be satisfied.

夷1 (U1-position polymer moiety) Table 2 Table 3 shows the component formulations of 93 Examples 4 to 6 and Examples 4 to 6 based on polyamide elastomer, and Table 4 shows their evaluation results. As is clear from Table 4,
Examples 4 to 6 satisfy all four properties of friction coefficient, abrasion resistance, adhesion force, and peeling force, but Comparative Examples 4 to 6 do not satisfy all four properties.

(Margins below) Table 3 (11th part by weight) Table 4 Next, Examples 7 to 10 shown in Table 5 will be described.
Examples 7.8 are based on thermoplastic urethane elastomers and Examples 9.10 are based on nylon elastomers. Further, in Examples 7 to 10, polyolefin having a melting point of 150° C. or lower or molybdenum di-II compound was added, although this was not an essential requirement of the present invention. The polyolefins include (J polyethylene, polypropylene, copolymers thereof, waxes, etc.), and the moisture content of the resin composition δ(
It has the effect of increasing dispersion processability, wear resistance, and strength. In addition, molybdenum disulfide has the effect of increasing the lubricity of the resin composition, but the amount added is 1 to 50%.
It is desirable to make it a heavy ω part. The evaluation results of Examples 7 to 10 are shown in Table 6, and it can be seen that Examples 7 to 10 are superior in four properties such as the coefficient of friction compared to Examples 1 to 3 described above.

Table 7 shows shell examples of each component used in each of Examples 1 to 10 described above after R.

Table 5 (unit weight parts) Table 6 Table 7

[Brief explanation of the drawing]

Figure 1 is a front view showing the friction coefficient measuring device, and Figure 2 is the pendulum IJX! FIG. 3 is a perspective view of a glass abrasion element used in an abrasion tester; FIG.
The figure is also a plan view.

Claims (1)

[Scope of Claims] i, 1 ooita part of a thermoplastic elastomer, and 1 to 5
0ffia part silicone oil and 5 to 200 f.
1 part of Teflon powder; and 1 part of Teflon powder. 2. Silicone oil is 5-20! The resin composition according to claim 1, wherein the amount of ll'fi is 1 part and the amount of Teflon powder is 10 to 30 parts by weight.