JPH0726077A - Thermoplastic olefin elastomer or resin material for calendering - Google Patents

Abstract

PURPOSE:To provide a thermoplastic olefin elastomer or resin material for calendering improved in calenderability without bleeding by using a thermoplastic olefin elastomer or resin and a metallic soap. CONSTITUTION:An ethylene copolymer rubber is blended with a polyolefin resin, followed by dynamic kneading thereof in the presence or absence of a cross-linking agent to obtain a partly cross-linked or uncross-linked thermoplastic olefin elastomer. 100 pts.wt. of this elastomer or a thermoplastic olefin resin of 0.01 to 30g/10min in melt flow rate is blended with 0.01-5 pts.wt. metallic soap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an olefin thermoplastic elastomer or a resin molding material for calender molding which is excellent in calender moldability and has no bleed.

[0002]

2. Description of the Related Art Although it has been attempted to calender an olefinic thermoplastic elastomer, it is known that the molding is extremely difficult because it adheres to a calender roll during molding. As a method for improving this drawback, it has been proposed to use an oil-extended olefinic thermoplastic elastomer and add a higher fatty acid amide thereto to improve the adhesion to a calender roll (Japanese Patent Publication No. 2-379).
42 publication). However, even if an ordinary olefinic thermoplastic elastomer that is not oil-extended is used and a higher fatty acid amide is added thereto, the effect of improving the adhesion to a calender roll is not exhibited, and the above-mentioned drawbacks cannot be eliminated. There wasn't. Further, there was a similar problem when the olefinic thermoplastic resin was calendered.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to prevent calendering of an olefinic thermoplastic elastomer or resin from being difficult to form due to sticking to a calender roll, and to obtain quality such as bleeding. An object is to provide a molding material that does not have the above problem.

[0004]

The present inventors have found that the above object can be achieved by incorporating a specific amount of metal soap into an olefinic thermoplastic elastomer or resin, and have completed the present invention.

That is, the present invention comprises 100 parts by weight of an olefinic thermoplastic elastomer or resin and 0.01 to 5 metal soap.
It is an olefinic thermoplastic elastomer or a resin molding material for calender molding, characterized in that it is composed of parts by weight.

The present invention will be described in detail below. The olefinic thermoplastic elastomer used in the present invention is an ethylene / propylene copolymer rubber, an ethylene / propylene / diene copolymer rubber, an ethylene / copolymer rubber such as an ethylene / butene copolymer rubber, and polypropylene, polyethylene or the like. The above polyolefin resin is blended and dynamically kneaded with a kneader such as a roll, a Banbury mixer, a single-screw extruder or a twin-screw extruder in the presence or absence of a crosslinking agent such as organic peroxide or sulfur. It is a partially crosslinked or non-crosslinked olefinic thermoplastic elastomer obtained, for example, JP-B-53-34210 and JP-B-55-1844.
It is obtained by the method described in JP-A-8.

The olefinic thermoplastic resin used in the present invention is a propylene resin such as polypropylene, propylene / ethylene block or random copolymer, propylene / butene copolymer, propylene / ethylene / butene copolymer, Examples thereof include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-medium-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, and other ethylene-based resins, which can be used in combination. Among the resins, melt flow rate (MFR: JIS-K6758, load 2.16k)
g, measured at 230 ° C.) 0.01 to 30 g / 10 min propylene resin is preferable because the effect of the present invention is remarkable.

Next, the metal soap used in the present invention is a fatty acid such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, Li, Pb, Na, K, Ca,
It is a salt of a metal such as Mg, Ba or Al, and a salt of a saturated fatty acid having 4 to 30 carbon atoms is preferable, and among them, a Li salt exerts a remarkable effect. Most preferred is Li stearate.

The content ratio of these essential components is 0.01 to 5 parts by weight, preferably 0.1 to 3 parts by weight, based on 100 parts by weight of the olefinic thermoplastic elastomer or resin.

When the amount of the metallic soap is too much, not only the physical properties of the olefinic thermoplastic elastomer or resin are deteriorated, but also bleeding causes stains on the calender rolls and whitening of the surface of the molded body, while the amount of the metallic soap is small. If it passes, the effect of the invention will not be achieved.

In addition to the above-mentioned essential components, the molding material of the present invention may contain other optional components as long as the effects of the present invention are not significantly impaired. Other optional components include non-olefin elastomers such as butyl rubber, styrene / butadiene rubber, styrene / butadiene block copolymers or hydrogenated products thereof; talc, calcium carbonate, clay, mica, barium sulfate, magnesium hydroxide, glass. Fillers such as fibers; pigments such as carbon black, titanium oxide, iron black, heat resistance stabilizers, cold resistance stabilizers antiaging agents, light stabilizers, UV absorbers, antistatic agents, neutralizing agents, lubricants (silicone oils) , Fluidity improver, molecular weight modifier (peroxide), anti-adhesive agent, anti-foaming agent, dispersant, metal deactivator, antibacterial agent, optical brightener, flame retardant, viscosity modifier, printability An imparting agent, a paintability improving agent, an adhesiveness imparting agent and the like can be added.

A predetermined amount of each of the above essential components and, if desired, optional components is blended and kneaded with a usual kneader such as a roll, a Banbury mixer, a single-screw extruder or a twin-screw extruder to prepare a composition. However, it is usually preferable to form a pellet. Moreover, when producing an olefin-based thermoplastic elastomer, it may be produced as a composition of the present invention by coexisting with a metal soap, or a masterbatch containing a high concentration of metal soap may be prepared with an olefin-based thermoplastic elastomer or resin. It may be diluted to obtain the composition of the present invention.

The composition thus obtained is molded into a calender sheet or film by a calender molding method, and is used for automobiles, especially automobiles such as flooring materials, ceiling materials, instrument panels, door trims and interior sheets. It is used for interior and exterior materials, leisure sheets, gaskets, waterproof sheets, bags, notebook covers, notebook covers, belts, etc. Further, the resin sheet or film can be used for food containers, various industrial parts and the like. Hereinafter, the present invention will be described more specifically with reference to Examples.

[0014]

EXAMPLES The evaluation methods used in the following examples are as follows. (1) Calender moldability Two rolls (calender roll) with a diameter of 6 inches are used.
Roll surface temperature 180-210 ° C, Roll speed 10m /
Min (roll speed ratio 1 to 1.1) and roll interval of 0.3 mm, 100 g of sample was wound on a roll for 5 minutes and the sheet was taken out. Roll peelability, surface smoothness, roll stain (blending) Adhesion of agent) was evaluated. The evaluation criteria are as shown in Table 1.

(2) Sheet bleeding property A 1 mm press sheet was prepared using the sheet obtained by the above-mentioned operation and allowed to stand in a 60 ° C. hot oven for 1 week, and then the degree of bleeding on the surface of the sheet was evaluated. The evaluation criteria are as shown in Table 1.

[0016]

[Table 1]

Example 1 Ethylene content 73% by weight, Mooney viscosity 1 + 4 (100
70 ° C.) ethylene / propylene copolymer rubber (EP
M) 70 parts by weight, density 0.90 g / cm ³ , MFR
30 parts by weight of polypropylene of 3 g / 10 min and 0.5 parts by weight of stearic acid Li were mixed and kneaded with an extruder at 200 ° C. to granulate. To 100 parts by weight of this pellet, 0.2
A solution of 2 parts by weight of 2,5-dimethyl-2,5-di- (t-butylperoxy) hexane dissolved in 0.3 parts by weight of divinylbenzene was blended and blended in a Banbury mixer, and the solution was pelletized. It was evenly attached to the surface. Then, the pellets were subjected to 210 under nitrogen atmosphere by an extruder.
By extruding at 30 ° C., 30 ° C. cyclohexane gel 30% partially crosslinked thermoplastic elastomer composition pellets were prepared.
The pellets were subjected to calendar molding, and their moldability and sheet bleeding property were evaluated. The results are shown in Table 3.

Example 2 Example 1 was repeated except that the amount of Li stearate was changed to 1.0 part by weight.

Comparative Example 1 Example 1 was repeated except that Li stearate was not added.

Comparative Example 2 The procedure of Example 1 was repeated, except that Li stearate was replaced by erucic acid amide.

Examples 3 to 10 Lithium stearate (1.0 parts by weight) was mixed with 100 parts by weight of the resin shown in Table 2 and extruded at 230 ° C. with an extruder to prepare pellets. The pellets were molded and evaluated in the same manner as in Example 1.

Comparative Example 3 The procedure of Example 3 was repeated except that Li stearate was not added.

[0023]

[Table 2]

[0024]

[Table 3]

[0025]

INDUSTRIAL APPLICABILITY According to the present invention, when the calender molding is performed, the calender molding is excellent in that it does not become difficult due to adhesion to a calender roll, and there is no quality problem such as bleeding. A remarkable effect is obtained such that an olefin-based thermoplastic elastomer or a resin molding material for use can be obtained.

Claims (6)

[Claims] 1. An olefin-based thermoplastic elastomer or a resin molding material for calender molding, which comprises 100 parts by weight of an olefin-based thermoplastic elastomer or resin and 0.01 to 5 parts by weight of a metal soap. 2. An olefinic thermoplastic elastomer,
The molding material according to claim 1, which is a partially crosslinked or non-crosslinked olefinic thermoplastic elastomer comprising an ethylene copolymer rubber and a polyolefin resin. 3. The molding material according to claim 1, wherein the olefin-based thermoplastic resin is a propylene-based resin having a melt flow rate of 0.01 to 30 g / 10 min. 4. The molding material according to claim 1, wherein the metal soap is a Li salt of a saturated fatty acid having 4 to 30 carbon atoms. 5. The Li salt of a saturated fatty acid is stearic acid L.
The molding material according to claim 4, which is i. 6. The molding material according to claim 1, wherein the compounding amount of the metal soap is 0.1 to 3 parts by weight.