JPH059342A - Stabilized olefin based thermoplastic elastomer (tpo) compostion - Google Patents

Abstract

PURPOSE:To obtain the title composition excellent in heat resistance and molding stability in high-temperature molding by blending an olefin based thermoplastic elastomer with a specific acrylate and phenolic antioxidant, etc. CONSTITUTION:The objective composition obtained by blending (A) an olefin based thermoplastic elastomer with (B) 2-tert.-butyl-6-(3-tert. butyl-2-hydroxy-5- methylbenzyl)-4-methylphenylacrylate and/or 2-[1-(2-hydroxy-3,5-di-tert.- amylphenyl)ethyl]-4,6-di-tert.-aminophenylacrylate, (C) phenolic antioxidant of tetrakis [methylene-3-(3,5-di-tert.-butyl-4-hydroxyphenyl) propionate]-methane and (D) sulfur based antioxidant of pentaerythrityl-tetrakis (3- laurylthiopropionate), preferably at each amount of these components B, C and D of 0.1-2 pts.wt. based on 100 pts.wt. component A and further containing an ultraviolet absorber, etc., as other components.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stabilized TPO composition which is excellent in heat-resistant processing stability during hot molding and heat discoloration resistance.

[0002]

2. Description of the Related Art Recently, due to the problem of waste disposal of plastics, mainly for vehicle seats, civil engineering, building material seats, etc.
There is a movement to switch the VC sheet to the TPO sheet.
TPO is easily deteriorated by heat during molding, and it is very difficult to produce a flame retardant sheet compound containing a flame retardant. Further, when attempting to calender these sheets, the releasability from the calender roll is poor, and the calender cannot be performed under the present circumstances. In order to improve the releasability from the calender roll, if a large amount of an amide type lubricant is added, the releasability can be slightly improved, but there is a problem that it is discharged (bloomed) to the surface of the formed sheet with time. Occur.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to prepare a TPO composition which can manage a TPO sheet by calendering and does not bloom over time.

[0004]

The TPO contains (A) 2-t-butyl-6- (3-t-butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate and / or 2 -[1- (2-hydroxy-3,5-di-t-amylphenyl) ethyl]-
4,6-di-t-amylphenyl acrylate, and (B) as a phenolic antioxidant, tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane, and (C) As a sulfur-based antioxidant, pentaerythrityl tetrakis (3-lauryl thiopropionate) is blended, and a stabilized TPO composition is used. It is possible to make TPO sheets that do not bloom over time.

The above-mentioned compounds (A), (B) and (C) are each 0.1 to 100 parts by weight of TPO.
It is preferable to use 2 parts by weight. If it is less than 0.1 parts by weight, the effect is not sufficient, and if it exceeds 2 parts by weight, it causes bloom.

The TPO in the present invention may further contain another polymer such as GP-PS, HI-PS, LD if necessary.
It may be blended with PE, HDPE, LLDPE, PP and the like. Further, in the present invention, if necessary, other additives such as an antioxidant, an ultraviolet absorber, a hindered amine light stabilizer, a lubricant, a pigment and an inorganic filler may be added. Specific examples of these additives include:
There are the following:

Examples of the ultraviolet absorber include 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4.
-Octoxybenzophenone, 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2-
[2-hydroxy-3- (3,4,5,6-tetrahydrophthalimidomethyl) -5-methylphenylbenzotriazole, 2- (3-t-butyl-2-hydroxy-5-methylphenyl) -5-chloro Benzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-di-
t-butyl-2-hydroxyphenyl) benzotriazole, 2- (2-hydroxy-5-t-octylphenyl) benzotriazole, 2- (3,5-di-t-
Amyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole and the like.

As the hindered amine light stabilizer,
Bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, dimethyl succinate and 1- (2-
Hydroxyethyl) -4-hydroxy-2,2,6,6
6, polycondensate with tetramethylpiperidine, poly [(6-morpholino-1,3,5-triazine-2,4
-Diyl) {(2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2,2,6,6
-Tetramethyl-4-piperidyl) imino}], bis (1,2,2,6,6-pentamethyl-4-piperidyl) 2- (3,5-di-t-butyl-4-hydroxybenzyl) -2 -Butyl malonate, 4- [3- (3,
5-di-t-butyl-4-hydroxyphenyl) propionyloxy] -1- [2- {3- (3,5-di-t-
Butyl-4-hydroxyphenyl) propionyloxy} ethyl] -2,2,6,6-tetramethylpiperidine, bis (1,2,2,6,6-pentamethyl-4-piperidyl) decanedioate, tetrakis (2 , 2,
6,6-Tetramethyl-4-piperidyl) 1,2,3
4-butane tetracarboxylate, poly [{6-
(1,1,3,3-tetramethylbutyl) imino-1,
3,5-triazine-2,4-diyl} {(2,2,
6,6-Tetramethyl-4-piperidyl) imino} hexamethylene {(2,2,6,6-tetramethyl-4-piperidyl) imino}], 1,2,3,4-butanetetracarboxylic acid and 1 , 2,2,6,6-pentamethyl-4
-Mixed esterified product with piperidinol and 1-tridecanol, mixed esterified product with 1,2,3,4-butanetetracarboxylic acid and 2,2,6,6-tetramethyl-4-piperidinol and 1-tridecanol,
1,2,3,4-butanetetracarboxylic acid and 1,2,
2,6,6-Pentamethyl-4-piperidinol and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro [5.
5] Mixed ester compound with undecane, 1, 2, 3,
4-butanetetracarboxylic acid and 2,2,6,6-tetramethyl-4-piperidinol and 3,9-bis (2-
Hydroxy-1,1-dimethylethyl) -2,4,8,
Mixed esterified product with 10-tetraoxaspiro [5.5] undecane, N, N'-bis (2,2,6,6-
Tetramethyl-4-piperidyl) hexamethylenediamine and 1,2-dibromoethane polycondensate, 2-methyl-2- (2,2,6,6-tetramethyl-4-piperidylamino) -N- ( 2,2,6,6-tetramethyl-
4-piperidyl) propionamide, N, N ', 4,
7-Tetrakis [4,6-bis {N-butyl-N-
(2,2,6,6-Tetramethyl-4-piperidyl) amino} -1,3,5-triazin-2-yl] -4,7
-Diazadecane-1,10-diamine, N, N ', 4
-Tris [4,6-bis {N-butyl-N- (2,2,
6,6-Tetramethyl-4-piperidyl) amino}-
1,3,5-Triazin-2-yl] -4,7-diazadecane-1,10-diamine, bis (1-acryloyl-2,2,6,6-tetramethyl-4-piperidyl)
2,2-bis (3,5-di-t-butyl-4-hydroxybenzyl) malonate, N, N ', 4,7-tetrakis [4,6-bis {N-butyl-N- (1,2 , 2,
6,6-Pentamethyl-4-piperidyl) amino}-
1,3,5-triazin-2-yl] -4,7-diazadecane-1,10-diamine, N, N ′, 4-tris [4,6-bis {N-butyl-N- (1,2 , 2, 6,
6-pentamethyl-4-piperidyl) amino} -1,
3,5-triazin-2-yl] -4,7-diazadecane-1,10-diamine, bis (2,2,6,6-tetramethyl-4-piperidyl) succinate, 2,
2,6,6-tetramethyl-4-piperidyl methacrylate, 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate, tetrakis (1,2,2,2)
6,6-pentamethyl-4-piperidyl) 1,2,3
4-butane tetracarboxylate and the like.

Examples of phenolic antioxidants include:
Triethylene glycol bis [3- (3-t-butyl-
4-hydroxy-5-methylphenyl) propionate], tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-trimethyl-2,4,6-tris (3,3) 5-di-t-butyl-
4-hydroxybenzyl) benzene, 2,4-bis (n-octylthio) -6- (3,5-di-t-butyl-4-hydroxyanilino) -1,3,5-triazine, 1,6- Hexanediol bis [3- (3,5-
Di-t-butyl-4-hydroxyphenyl) propionate], 2,2′-thio-diethylenebis [3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionate], tris (4-t-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate, and the like.

Examples of phosphorus antioxidants include tetrakis (2,4-di-t-butylphenyl) 4,4'-biphenylenediphosphonite and bis (2,4-di-).
t-butylphenyl) pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, 4,4′-isopropylidene-di-phenolalkyl (C ₁₂ -C ₁₅ ) phosphite, tris (nonylphenyl) phosphite, etc. is there.

[0011]

The present invention will now be described in detail with reference to examples, but the present invention is not limited to these. Example 1. Sumitomo TPE WT222 8 as TPO
20 parts by weight of Sumitomo Noblen PP (S-131)
Parts by weight were used, and as additives to be compounded, the following were used. A-1 2-t-butyl-6- (3-t-butyl-2
-Hydroxy-5-methylbenzyl) -4-methylphenyl acrylate A-22 [1- (2-hydroxy-3,5-di-t
-Amylphenyl) ethyl] -4,6-di-t-amylphenyl acrylate B-1 tetrakis [methylene-3- (3,5-di-
t-Butyl-4-hydroxyphenyl) propionate] methane B-2 3,9-bis [2- [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy] 1,1-dimethyl Ethyl] 2,4,8,10-
Tetraoxaspiro [5,5] undecane B-3 n-octadecyl 3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate B-4 1,3,5-trimethyl-2,4,6 -Tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene B-5 2,2'-methylenebis (4-methyl-6-
t-butylphenol) C-1 pentaerythrityl tetra (3-laurylthiopropionate) C-2 dilaurylthiodipropionate D-1 tris (nonylphenyl) phosphite D-2 distearyl pentaerythritol diphosphite E -1 Oleic acid amide E-2 Erucic acid amide F-1 Antimony trioxide F-2 Tetrabromobisphenol A These compounds are shown in Table 1 for the above TPO, respectively.
After dry-blending in an amount shown in (1), the mixture was kneaded with two rolls at 190 ° C., and after 30 minutes, the peelability from the roll, the presence or absence of plate-out, the surface property of the sheet, and the state of bloom over time were compared and tested. The results are shown in Table-1.

[0012]

[Table-1]

Embodiment 2. Sumitomo Noblen PP was added to 80 parts of Mitsui Petrochemical's Mirastomer 6030N as a TPO.
A comparative test was carried out using a two-roll system as in Example 1 except that 20 parts of (S-131) was used. The combined addition amount and the result are shown in Table 2.

[0014]

[Table-2]

Note 1. Peelability 5. Good peelability (Peels with almost no resistance) 4. Peelability somewhat poor 3. Peeling failure (Calendar processing seems difficult) 2. Barely peeling 1. Cannot be peeled off

[0016]

The TPO composition of the present invention is excellent in heat-resistant processing stability and heat-resistant discoloration during high-temperature molding. Therefore, since it can be calendered, it is useful as a sheet for interior materials for vehicles, a film for leather, and the like.

Claims (1)

Claims: 1. An olefinic thermoplastic elastomer (hereinafter referred to as TPO) having (A) 2-t-butyl-6- (3-t-butyl-2-hydroxy-5-methylbenzyl) -4-Methylphenyl acrylate and / or 2- [1- (2-hydroxy-3,5-di-t-amylphenyl) ethyl] -4,6-di-t-amylphenyl acrylate and (B) As a phenolic antioxidant, tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane
And (C) a sulfur-based antioxidant, which is blended with pentaerythrityl tetrakis (3-lauryl thiopropionate), which is a stabilized TPO composition.