JPS59226049A - Polyvinyl chloride composition - Google Patents

Abstract

PURPOSE:The titled composition having effectively flame retardance without damaging low voltaility and freeze resistance, obtained by blending polyvinyl chloride with a straight-chain alcohol phthalic ester and a chlorinated alpha-olefin as plasticizers, and antimony oxide as a flame-retardant. CONSTITUTION:100pts.wt. polyvinyl chloride is blended with 40-70pts.wt. 9-12C straight-chain alcohol phthalic ester and 5-25pts.wt. chlorinated 20-30C alpha-olefin containing 38-42wt% chlorine as plasticizers and 2-20pts.wt. antimony oxide as a flame-retardant. USE:Suitable for synchetic leather substitute for cars.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides polyvinyl chloride with 9 to 1 carbon atoms as a plasticizer.
Concerning a polyvinyl chloride composition containing a linear alcohol phthalate ester (2), a chlorinated product of a long-chain α-olefin, and antimony oxide as a flame retardant, its purpose is to improve the plasticity required for synthetic leather for vehicles. Our objective is to provide a polyvinyl chloride composition that is effectively flame-retardant using a chlorinated hydrocarbon-antimony oxide system while minimizing adverse effects on properties, low volatility, and cold resistance. The main use of vinyl chloride compositions is synthetic leather for car widths, but so-called PVC leather for cars is not only flame retardant, but also has temperatures up to 80% in midsummer.
℃ or above, and even when the temperature reaches -40℃ or below, the problem of fogging (fogging of window glass due to volatilization of plasticizer) does not occur, and flexibility (cold resistance) must be maintained. It is. However, as a low volatility performance, 120℃
It is desired that the volatilization loss after 400 hours is 15 or less, and as for the cold resistance, a crushed purg softening temperature of -40°C or less is desired. Therefore, when manufacturing PVC leather for wheels, a linear 7/l/coal 7 tarate ester with a carbon number of 9 to 12, which has low volatility and good cold resistance, is usually used as a plasticizer, and antimony oxide is added. Various methods are being used to make it flame retardant.

Normally, in order to make soft PVC resin compositions such as PVC leather flame retardant, part of the plasticizer is replaced with a general-purpose halogen-based flammable secondary plasticizer such as chlorinated paraffin, and antimony trioxide This is achieved through the synergistic flame retardant effect of antimony trioxide and halogen.

However, varieties made from rough-in wax with a carbon number of 20 to 30, which has low volatility as a chlorinated rough-in, have poor cold resistance, while carbon #!, which has good cold resistance, has poor cold resistance. Varieties made from n-paraffin of ilO~18 have the disadvantage of high volatility. Therefore, it was unsuitable for use in fields where low volatility and cold resistance are particularly required, such as automotive resols.

The present inventors have proposed flame retardant polyvinyl chloride compositions using charcoal F[9-
12 (7 [As a result of various studies on J-chain alcohol phthalate esters, chlorinated hydrocarbons, and antimony oxide systems, we found that α-olefins having 20 to 30 carbon atoms were chlorinated to have a chlorine content of 38 to 42% as a secondary plasticizer. By using a chlorinated α-olefin obtained by adding antimony oxide, it is possible to achieve the low volatility and cold resistance of linear alcohol phthalate esters with 9 to 12 carbon atoms, which are used as plasticizers. It has been discovered that a polyvinyl chloride composition with excellent flame retardancy can be obtained without impairing the properties of polyvinyl chloride.Also, by blending linear alcohol phthalate ester having 9 to 12 carbon atoms as a plasticizer with polyvinyl chloride. Compared to the method of making a vinyl chloride composition flame retardant using antimony oxide alone, by further blending the above-mentioned α-olefin chloride as a secondary plasticizer, it is possible to make the vinyl chloride composition flame retardant. It is also possible to reduce the amounts of each of the 12 linear alcohol phthalates and antimony oxide used.

Even among α-olefins, those with 18 or less carbon atoms and those with 20 to 30 carbon atoms and less than 38% chlorine content are highly volatile, and linear alcohol phthalate esters with 9 to 12 elements are commonly used. Impairs the false low volatility of. In addition, even if the carbon number is 20 to 3 o, the chlorine content is 43g6 or more, and if the carbon number is 32 or more, regardless of the chlorine content, linear alcohol phthalic acid with a carbon number of 9 to 12 Because it impairs the excellent cold resistance of ester, d? is used for vehicles that require low volatility and cold resistance. It is not suitable for making flame retardant vinyl chloride compositions.

The present invention was made based on such knowledge, and (4) 40 parts by weight of linear alcohol phthalate having 9 to 12 carbon atoms as a plasticizer to 100 parts by weight of polyvinyl chloride.
~70 parts by weight, carbon number 20-30, chlorine content 38-4
5 to 25 parts by weight of 2% α-olefin chloride, (B)
This is a low volatility, excellent cold resistance, and flame retardant polyvinyl chloride composition which contains 2 to 20 parts by weight of antimony oxide as a flame agent.

Examples of the linear alcohol phthalate having 9 to 12 carbon atoms used in the present invention include dinonyl phthalate, didecyl phthalate, dilauryl phthalate, dilauryl phthalate, and mixtures thereof. Products that meet these requirements include rDUPJ (manufactured by New Japan Chemical Co., Ltd.) and rPL2.
00J (manufactured by Mitsubishi Gas Chemical), rPL911PJ
(Shell Chemical Exhibition) and Vinicizer 124J (manufactured by Kao Soap).

Further, α- having 20 to 30 carbon atoms used in the present invention
α-olefin, a raw material for chlorinated olefins, is obtained as a by-product of α-olefin produced for synthetic detergents, and is used singly or as a mixture. For example, examples of the mixture include "Diaref 208" manufactured by Mitsubishi Chemical Corporation. The α-olefin chloride can be easily produced by chlorinating 938 to 42% of α-olefin in a heated and melted state with chlorine.

Antimony oxide in the present invention refers to antimony trioxide or antimony pentoxide.

In addition to the above-mentioned components, there is no problem in adding pigments, fillers, antistatic agents, surface treatment agents, ultraviolet absorbers, foaming agents, stabilizers, antioxidants, etc. as necessary.

The reason why the amount of each component is limited in the present invention is that if it deviates from this range, sufficient low volatility, cold resistance, and flame retardance cannot be obtained.

Next, a detailed explanation will be given using an example.

Example Each component shown in the table below was kneaded using a mixed wire roll at 160°C.
Press molding was performed to obtain a sheet with a thickness of one crocodile.

Regarding this sheet, flame retardancy (oxygen index), volatility (12
Tests were conducted on the volatile range (1t), mechanical properties, heat aging properties, etc. at 0°C for 400 hours, and the results are shown in the table.

As is clear from the table above, according to the present invention, the flame retardance (oxygen index) can be improved without increasing the volatilization loss of the sheet and without reducing the cold resistance or mechanical properties. Good flame retardancy is maintained even if the amount of linear alcohol phthalate having 9 to 12 carbon atoms and antimony trioxide is reduced, making it extremely suitable for use as synthetic leather for vehicles. That will be understood.

Patent applicant: Ajinomoto Co., Inc.

Claims (1)

[Claims] With respect to 100 parts by weight of polyvinyl chloride, (4) 40 to 70 parts by weight of linear alcohol phthalate ester having 9 to 12 carbon atoms as a plasticizer and chlorine content of 38 parts by weight with 20 to 30 carbon atoms.
A polyvinyl chloride composition comprising 5 to 25 parts by weight of a chlorinated α-olefin of 1 to 42%, and 2 to 20 parts by weight of antimony oxide as the (B) M refueling agent.