JPS60243145A - Polyvinyl chloride resin composition for wrapping film - Google Patents

Abstract

PURPOSE:To obtain the titled composition having remarkably reduced evaporation residue without decreasing the plasticizer, prolonged decomposition time, and improved gelation property and tackiness, by compounding a monomeric secondary plasticizer with an aliphatic polybasic acid polyester plasticizer. CONSTITUTION:100pts.wt. of a polyvinyl chloride is compounded with 10-50pts. of a monomeric secondary plasticizer and 1-50pts. of an aliphatic polybasic acid polyester plasticizer. The monomeric plasticizer is preferably an aliphatic dibasic acid ester, a polybasic hydroxycarboxylic acid ester, a fatty acid ester or their combination. The polyester plasticizer is those containing an aliphatic polybasic acid and a polyhydric alcohol as essential components.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a polyvinyl chloride resin composition for soft wrap films mainly used for food packaging and the like.

(Prior Art and Problems to be Solved by the Invention) Conventionally, for polyvinyl chloride resin compositions for wrap films (hereinafter referred to as vinyl chloride rubber), emphasis has been placed on the hygienic properties of the ingredients and the transferability to foods, etc. ing. Regarding the hygiene of such compounded products, the US Pharmaceutical and Food Administration (FDA) and Japan's Self-Regulatory Standards for PVC Food Containers and Packaging (hereinafter referred to as PL)
A detoxified formulation is established by selecting compounding agents listed in the standards (referred to as standards), etc., and adipic acid esters, acetyl tributyl citrate (ATBC), etc. are usually used.
Regarding migration into foods, etc., the Ministry of Health and Welfare Notification No. 20 regulates the extraction of PVC lamps as an evaporation residue test method. If more than 40 parts by weight are added to the total weight of 150 ppI11 or less, it tends to significantly exceed the standard of 150 ppI11 or less of the evaporation residue test method (Notification No. 20, N-Hebukun Extraction Evaporation Residue Test Method).

(Means for solving the problems) As a result of intensive research into these points, the present inventors found that
Seven studies have found that by using a monomeric secondary plasticizer and a polyester plasticizer in combination, the evaporation residue can be significantly reduced without reducing the amount of plasticizer.

The polyvinyl chloride (PVC) used in the present invention is a homopolymer of vinyl chloride or a heavy polymer copolymerized with the R-mer, such as α-olefin, olefin chloride, vinyl alcohol, alkyl vinyl ether, vinyl It is a vinyl chloride polymer obtained by copolymerizing a small amount of ester, unsaturated acid, unsaturated acid ester, etc., and refers to these alone or as a mixture. In addition, the monomeric secondary plasticizer used is an esterified product of a non-aromatic mono- or polycarboxylic acid and a monoalcohol, and is mainly an aliphatic dibasic acid ester, a hydroxy polyhydric carboxylic acid ester, and/or a monomeric secondary plasticizer. or a fatty acid ester, such as an aliphatic digroup 'y! i, acid esters include diisononyl adipate, dioctyl adipate, diisobutyl adipate, diisodecyl adipate, n-octyl-n-adipate
Decyl, n-hexyl-n-octyl adipate-〇-
Decyl, dialkyl adipate (alkyl=07, C9
), dibdel sepatate, dioctyl sepatate, di-n-hexyl azelate, dioctyl azelate; hydroxy polycarboxylic acid esters include diethyl tartrate, acetyl triethyl citrate, acetyl tributyl citrate (ATBC), acetyl citrate-tributyl -2-ethylhexyl, tributyl citrate, citric acid hexano,
D, tristearyl; Fatty acid esters include methyl acetyl ricinoleate, butyl acetyl ricinoleate, ethyl valmitate, ethyl stearate, n-butyl stearate, amyl stearate, cyclohexyl stearate, butyl oleate, etc., and PVC10
0 parts by weight of a monomeric secondary plasticizer, preferably an aliphatic dibasic acid ester, a hydroxy polyhydric carboxylic acid ester, or a fatty acid ester, alone or in combination, from 10 to 5
It is used in a proportion of 0 parts by weight. The aliphatic polybasic acid-based polyester plasticizer has a molecular weight of 1000 to 8000, preferably 1000 to 8000, and is composed of an aliphatic polybasic acid and a polyhydric alcohol as quaternary components, and if necessary a monohydric alcohol or a -valent fatty acid. For example, poly(1,3-butanediol/adipic acid) coconut oil fatty acid ester, poly(propylene glycol/cepatic acid) n-decanol ester, etc.
It is used in an amount of 1 to 50 parts by weight per 00 parts by weight of CI.

In the composition of the present invention, it is preferable to use together an epoxy compound, a stabilizer, an antifogging agent, and other compounding agents that conform to PL standards. The epoxy compound mentioned here refers to epoxidized vegetable oil such as epoxidized soybean oil and/or epoxidized linseed oil, and the preferable amount used is 1 part by weight of pvctoo.
~20 parts by weight, and heat resistance and processability are improved by its blending.

(Effects of the Invention) By using a polyester plasticizer in combination with a monomeric secondary plasticizer, the composition of the present invention can significantly reduce evaporation residue, extend decomposition time, and improve nigelability. This is greatly improved and also improves the adhesion of the film.

(Examples) Next, the present invention will be further explained by Examples and Comparative Examples.

Note that parts in the examples are based on weight.

Examples 1 to 4 and Comparative Examples 1 to 2 Each raw material shown in Table 1 was kneaded for 7 minutes on two rolls (8 inches) at 170°C to produce a wrapping film with a thickness of 0.15 ± 0.01 mm. I got it. The physical properties of the film are shown in Table 1.

Example 5.6 and Comparative Example 3 The raw materials shown in Table 2 were kneaded at 190°C, and a film for wrapping having a thickness of 18 microns was obtained by inflation.

Its physical properties are shown in Table 2.

Table 2 The numbers in circles in Table 1 and Table 2 are as follows.

■ Geon 102EP: Polyvinyl chloride resin, average degree of polymerization 1300, manufactured by Nippon Zeon ■ Monocizer W-245: Diisononyl adipate, registered trademark, manufactured by Dainippon Ink ■ Polycizer 1'l-3601! L: Adibic acid-based polyester, average molecular weight 2300, registered trademark, manufactured by Dainippon Ink ■ Polycizer W-1040EL: Adivic acid-based polyester, average molecular weight 1000, registered trademark, manufactured by Dainippon Ink ■ Evosizer W-100EL: Epoxidized soybean oil ,
Registered trademark, manufactured by Dainippon Ink■ 8-inch roll, sheet kneaded at 170°C for 5 minutes,
Thickness: 150±10μm ■ Put the film surface in close contact and peel off by hand, ◎: Excellent, ○
: Good, Δ: Not possible ■ Quantitative analysis value by GC, GPC ■ Notification No. 20 test, evaporation residue test conditions (25℃ x 6
0 minutes) [Phase] Notification No. 20, n-hebutane extraction evaporation residue test method (immersion method) ■Commercial product @ Brahender = 150°C, 50 rpm, sample 5
0g administration @: 220°C, 7.5 rpm, sample 6
0g administration agent Patent attorney Takam Katsutoshi

Claims (1)

[Claims] A polychlorinated film for wrap films, which contains 10 to 50 parts by weight of a monomeric secondary plasticizer and 1 to 50 parts by weight of an aliphatic polybasic acid polyester plasticizer per 100 parts by weight of polyvinyl chloride. Vinyl resin composition.