JPS5915437A - Polyolefin composition - Google Patents

Abstract

PURPOSE:To provide a compsn. which has a high crosslinking rate and an excellent crosslinking effect, by incorporating a specified polyfunctional compd. and an org. peroxide in a polyolefin. CONSTITUTION:A polyolefin compsn. contains a polyolefin (A) such as PE, PP or ethylene/propylene rubber, xylene-alpha,alpha'-diyl-bis[3,5-di-(2-propenyl)-1,3,5-triazine-2, 4,6(1H,3H,5H)-trione] (B) such as o-xylene-alpha,alpha'-diyl-bis[3,5-di-(2-propenyl)-1,3,5- triazine-2,4,6-(1H,3H,5H)-trione] and an org. peroxide (C) such as t-butylperoxy isopropyl carbonate. By using the polyfunctional compd. (B) as a crosslinking aid in the crosslinking of the resin (A) with the crosslinking agent (C), a compsn. having a high crosslinking rate and an excellent crosslinking effect can be obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to crosslinkable polyolefin compositions. For more details, see polyolefin, xylene, metal 444y-diylubis [3,! -G(,2-propenyl) '+3+') riazine-J, 4-
(/H.

JH, 611)-)ion] and an organic J oxide, the present invention relates to a polyolefin composition having excellent crosslinking speed and crosslinking effect.

Crosslinked polyolefin maintains the original excellent properties of polyolefin, such as electrical properties and mechanical strength, while maintaining heat resistance,
It has improved chemical resistance, environmental stress cracking resistance, and modulus of elasticity, and is widely applied in the fields of wire and cable insulation, heat-resistant pipes, tubes, and films, mata packing, and gaskets.

In general, known methods for crosslinking polyolefins include a crosslinking method using organic peroxides such as those found in polyethylene, and a crosslinking method using water removal grafted with a silane compound. Furthermore, as a crosslinking method for Oteshin-propylene copolymer, chlorinated polyethylene, ethylene-vinyl acetate copolymer, etc., a polyfunctional compound having co or more unsaturated groups in one molecule is used together with an organic peroxide. Methods of combined use are known.

Polyolefin is a substance that is inherently difficult to crosslink, and organic-AI! Depending on the compound, it is difficult to quickly obtain a crosslinked product having a high crosslinking density. In order to obtain a high crosslink density, a long reaction time is required, and if the reaction is attempted to proceed quickly, the result is a crosslinked product containing a non-uniform gel. Also.

Breakage of molecular chains occurs, resulting in more by-products. Method #-1 of grafting a silane compound: The crosslinking speed is slow, and in order to increase the internal crosslinking density, it is necessary to immerse it in water for a long time or to raise the water temperature for a long time. be.

In addition, in combinations of organic peroxides and polyfunctional compounds, acrylic esters, methacrylic esters, diacryl phthalates, doria-containing isocyanurates, etc. are usually used as polyfunctional compounds. The substance is liquid at room temperature) and has poor compatibility with polyolefins, resulting in poor dispersibility during kneading and difficulty in uniform dispersion. Further, after mixing, a phenomenon called so-called bleed or blooming occurs in which the polyfunctional compound oozes out onto the surface of the kneaded material over time. These things are extremely unfavorable in obtaining a uniform crosslinked product.

The present inventors have conducted research to solve the above drawbacks.
,,! r-G (λ-gropenyln-/, J.

Yo-Triazinko,≠,6- (/H,J H,j
H)-trione] and an organic peroxide.

di(,2-propenyl) -/, J, Jr -) riazine (copropenyl no/, J, j-) riazine -,
2゜-propenyl) -/, J, it-) riajinko, 4L, 6- (/H, j H, /H two trione) are all applicable.

Examples of the polyolefin of the present invention include the following polymers.

That is, thermoplastic polymers generally referred to as polyolefins can be enumerated from crystalline to non-crystalline polymers. Also included are polyolefin conductors obtained by chemically or physically treating polyolefins.

Specifically, high-pressure polyurethane, low-pressure polyurethane, polybutene, and goomethylpentene-l.

There are other polymers of alpha-olefins. Further examples include chlorinated polyethylene, chlorosulfonated DL-lyethylene, halogeno-phosphorized polyethylene, and grafted modified polyethylene obtained by grafting maleic anhydride, fumaric acid, acrylic e1 methacrylic acid, etc. onto polyethylene.

Also included are the olefin copolymers described below.

That is, random copolymers of ethylene and α-olefins, block copolymers of ethylene and α-olefins, copolymers of ethylene or α-olefins with other vinyl monomers, ethylene or α-olefins and conjugated dienes. Examples include alternating copolymers with Specifically, ethylene-propylene rubber, ethylene-propylene-diene rubber, ethylene-propylene stereoblock copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, j- 1,000L
/') Methyl taacrylate copolymer, propylene-butadiene alternating copolymer, ethylene-diallyl ester copolymer, and the like.

Particularly preferred organic peroxides are those having a 1 minute half-life temperature of approximately 16°C to 10°C.
-butylene peroxyisoglopyl carbonate, di-t
-butyldino)0-oxyphthalate, t-butylperoxyacetate 1.2. j-dimethyl-,2,j-di(benzoylperoxy)hexane, t-butylperoxylaurate, t-butylveroxymaleic acid, t-butylveroxybenzoate.

Examples include methyl ethyl ketone peroxide, dicumyl peroxide, cyclohexanone peroxide, cyclohexanone peroxide, and 1-butyl dicumyl peroxide. Nire et al.'s organic peroxide can be used by mixing it with one or two tools. The amount of these additions is 0.000 parts per 100 parts by weight of polyolefin. θ
Ol~0. O4 mole preferably Q, θoz~0. With 1 mole of O (copropenyl) -/,! ,! - triazine, g, 6-(/H, JH, jH)-)ion] is added in an amount of 0.1 to 1 per part of polyolefin/DON.
0 parts by weight, preferably 3 to 1 parts.

, the composition of the present invention contains mixingerol, calenderol,
The mixture is produced by kneading at room temperature and heating using a commonly used mixer such as a Kneader 1 extruder. Pigments, fillers, 5 lubricants, process oils, heat stabilizers, and antioxidants during crosstalk.

There is no problem in using additives such as ultraviolet absorbers.

The composition of the present invention can be rapidly crosslinked by heating to /jO to /10'', and can provide a crosslinked polyolefin with a high crosslink density.

Polyfunctional compounds are generally used when polyolefins are crosslinked with organic peroxides, such as trimethylolpropane trimethacrylate, triallyl isocyanurate, triallyl cyanurate.

-diyl-bis[3,! -G(,2-propenyl)1
,J,! -) riazine-,2,4L,6- (/H
, J.H.

The present inventors have revealed for the first time that polyolefins containing H)-)ion have a specifically high crosslinking rate and a strong crosslinking effect. It is debased.

The polyolefin composition of the present invention has a crosslinking rate of 1 d (-2
-propenyl)'+'+') riazine-2, Hiromu, 6
-(/H,!, 11.!H)-trione] is presumed to have better compatibility with polyolefins than conventional polyfunctional compounds, thereby enabling homogeneous crosslinking and crosslinking.

Next, the present invention will be explained with reference to examples.

In the examples, 1 part means part by weight, and 1 part means part by weight.

Example 1 and Reference Example 1 Polyethylene (M = J, (7) K-csmt
The mixture shown in the table was kneaded using a Brabender plasticorder for 5 minutes after adding organic peroxide, and then press-molded at is'o C to produce a sheet with a thickness of 2 fins. o, i p of the obtained crosslinked polyethylene was 10
Transfer to a 0tttl Erlenmeyer flask and add toluene tooH1.
The contents were boiled on a hot plate for g hours with a backflow condenser attached, and the contents were taken out, air-dried, and then vacuum-dried at 50° C., and the toluene-insoluble portion was measured as the gel content.

Table 1 shows the relationship between crosslinking time and gel content.

Table 1 G(+2-propenylto 1.J,j-triazine-
λ, <j, 4- (/H,J)l,jH)-1
-Lion.

Table 1 Example (Co) and Reference Example (Coethylene-Propylene-Diene Rubber CBpDM) With the formulations shown in Table 3, the roll dimensions were 20. J
/J and rotation speed /rr, temperature s at p0m.

It is shown in Table 1. Measurement of physical properties of vulcanized products is JL31! , AJOI
Compliant with.

Table 3 Table 1 *-2! % compression height, after aging for 7-2 hours at 100°C in a gear oven Example 3 and Reference Example 3 Chlorinated borium acetate was prepared using the same roll as in Example 3 with the formulation shown in Table 5. There was a crosstalk at j℃. 1
Vulcanization time when vulcanized at 60° C. @, W; JL (3KAJ (7/).

Table 5 Di(cobropenyl)-i, J, z-) Riazine-2
, Hiroshi, A-(/H,JH,jH)-trione] Table 6 *jj% compression, ioo°C in gear oven.

After aging for a few hours, the ethylene-vinyl acetate copolymer was aged at 30 to 4 AoC using the same roll as in Example 4 with the formulation shown in Table 7.
Vulcanization time and JIE when vulcanized at 160℃ mixed with
The physical properties of the vulcanizate determined according to IKAlO2 are shown in Table 1.

Table 7 - (Copropenyl) 1, 3. J-) riazine-,2,
4', A - (, / H, J H, j H)
-) Rion] Table r * Compressed Kakojq 6% gear oven / 60″G.

After this time aging 11 people Nippon Kasei Co., Ltd. Representative/Representative Patent Attorney for Hase (1 other person)

Claims (1)

[Claims] One screw [3,! -G [copropenyl]-1, J, j
-triazine-2,u,A-(/H,J R. -diyl-bis(J,!-di(,2-propenyl)1,J,j
A polyolefin composition which is 6-(/H, JH.jH)-)Rion]. (3) The polyolefin resin described in claim tl) [3,! -G(copropenyl)-Sirubis(3,s-G(s-propenyl)-/,!,!
- Triazinko, Hiro, 6- (/H, J H. jH)-trione]. Monobis[3,j-di(copropenyl)-diyl-bis[31! -G(,2-propenyl)-/,J,! −
) Riajinco, μ, A-(1′H,JH.jH)-)ion].