JPS59183685A - Tobacco filter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cigarette filter that has an excellent removal rate of harmful substances in tobacco smoke.

Traditionally, the materials used for cigarette filters are acetate,
Various materials have been proposed, including paper, rayon, and polypropylene, and some of these materials have already been put into practical use.
From the viewpoint of the removal effect of harmful substances in tobacco smoke, especially carcinogenic substances, it cannot be said that it is necessarily satisfactory.

On the other hand, a method of incorporating a substance that reduces harmful substances into the material of such a filter, such as a hemin compound containing trivalent iron, a method of incorporating L-ascorbic acid stearate, and a method of incorporating cyclodextrin. etc. have been proposed.

As a result of research into a filter that can broadly remove harmful substances, particularly potentially carcinogenic substances, from tobacco smoke, the inventor found that the purpose could be achieved by including a phthalocyanine compound and a highly water-absorbing material in the filter base material. I found out what I can achieve.

That is, the present invention is a cigarette filter characterized in that a phthalocyanine compound and a highly water-absorbing material are present in a filter base material.

In the present invention, the phthalocyanine compound can be present in the filter by adding the phthalocyanine compound itself into the filter base material, by attaching the phthalocyanine compound to the filter base material, by chemically bonding the phthalocyanine compound to the filter base material, Alternatively, there is a method in which a phthalocyanine compound is added to, attached to, or bonded to another material and then inserted into the filter base material.

In the present invention, the phthalocyanine of the phthalocyanine compound includes metal-free or phthalocyanine containing metals such as copper, nickel, cobalt, aluminum, and iron.

The phthalocyanine compounds of the present invention are widely known in the dye and pigment industries, and the present invention includes phthalocyanine pigments, phthalocyanine direct dyes, and
It is advantageous to use phthalocene dyes, sulfur dyes, vat dyes, reactive dyes and the like.

Dyes other than pigments and reactive dyes are suitable for addition to or attachment to the substrate, and reactive dyes are suitable for bonding to the substrate.

In the present invention, filter base materials include conventionally known materials such as acetate, cotton, paper, rayon, polypropylene, and water, as well as various materials such as protein, polyamide, polyvinyl alcohol, silica gel, and polystyrene. These are used in the form of fibers, powders, beads, solutions, etc. Particularly suitable substrates for bonding reactive dyes include organic and inorganic substances having hydroxyl, amide, mercapto, and carbonamide groups, such as polysaccharides [cellulose, starch, Sepharose ( (manufactured by Pharmacia), proteins (wool, silk), polyamides (nylon, polyacrylamide), polyvinyl alcohol, silica gel, etc.

The phthalocyanine compound is added or adhered to these base materials by a method known per se, or is present in the base material by mixing it in the form of fibers or powder during the process of making the filter. This super absorbent material is used to retain moisture in the filter during smoking.

In the present invention, the super absorbent material is preferably a special super absorbent polymer, such as starch/sodium acrylate, graft copolymer, salt of imbutylene/maleic anhydride copolymer, styrene/maleic anhydride. Examples include salts of copolymers of IJ, cross-linked products of sodium acrylate, polyvinyl alcohol/acrylate graft copolymers, saponified products of copolymers of vinyl ester/ethylenically unsaturated carboxylic acids, and other derivatives. I can do this. Among these, superabsorbent polymers, which are polymer electrolytes containing carboxylic acid salts, are desirable because they have a high water absorption capacity and have excellent strength after water absorption.For example, Sumikagel F-3
3 (manufactured by Sumitomo Ib Gakusha: polyacrylic acid cross-linked product).

In the present invention, materials commonly known in filter technology such as activated carbon can also be used in combination.

The filter of the present invention removes harmful substances, especially aromatic compounds, present in cigarette smoke in the presence of a small amount of water.
Compounds having two or more aromatic rings, such as benzopyrene, can be effectively adsorbed and removed.

In the present invention, the cigarette filter is generally placed inside the cigarette but may be attached to one end of the cigarette depending on the base material used.

The phthalocyanine used in the present invention, such as copper phthalocyanine, is a compound having the following skeleton.

(hereinafter abbreviated as CuPc) The phthalocyanine compound used in the present invention is a pigment,
As a dye, it is described, for example, in the New Edition Dye Handbook, edited by the Organic Synthetic Chemistry Association, Maruzen Co., Ltd. (published on July 20, 1970), pages 316 to 1109, and the Color Index. The following are specific examples:

C1I, Direct Blue 86 (direct dye) [Cu
P c±-(SO3Na)2 C01, Bat Blue 29 (Vat dye) (Niphonthrene Brilliant Blue 4G Pace!: Sumitomo Chemical product) C, 1, Pigment Blue 15 (Pigment) CuP
c (α type) CuPc (β type) [CuPcner CZ C, I, Pigment Blue 16 Pc (metal-free phthalocyanine) C, I, Pigment Blue 17 (Cu P C+(-503Ba) 3 (Cu P
c Momai S O3A, / ) 2C,I. pigment
Green 7 [CuPC-3-Cl (,4~□6) C9■. Pigment Green 36 C, I. Reactive Blue 7 (Reactive dye) Z C,X, Reactive Blue 15C0■. Reactive Blue 21 C,I. Reactive Blue 75 (Cibacron Pronto Turquoise G: Ciba Gaiki Reactive Dye) C, 1, Reactive Blue 116 (Levafix Turquoise Blue E-BA: Bayer Reactive Dye) C, I, Reactive Blue 118 (Sumifix Turquoise Blue) GS: Sumitomo Chemical Reactive Dye) C, I. Reactive Blue 148 (Sumifix Turquoise Blue BF = Sumitomo Chemical Reactive Dye) C,I, Reactive Blue 105 (Levafix Turquoise Blue PBRA: Bayer Reactive Dye) C0I. Reactive Blue 18 (Cibacron Turquoise Blue TGE: Ciba Geigy Reactive Dye) C, I. Reactive Blue 41 (Cibacron Turquoise Blue 2GE: Ciba Geigy reactive dye) C, I. Reactive Blue 71 (Prodione Turquoise H-A: ICI Reactive Dye) C,I. Reactive Blue 25 (Prodione Brilliant Blue H-5G: ICI Reactive Dye) 06N. Reactive Blue 80 (Levafix Turquoise Blue E-4G: Bayer Reactive Dye) C, I. Reactive Blue 3 (Prodione Brilliant Blue H2C: ICI Reactive Dye) C,I. Reactive Blue 72 (Cibacron Turquoise Blue GR-D: Ciba Geigy Reactive Dye) To attach or bond these dyes to the base material,
This can be carried out by methods known per se. For example, when bonding reactive dyes to cellulose substrates, this can be done in an aqueous medium in the presence of an alkaline agent.

In the present invention, when a commercially available pigment product is used as a phthalocyanine compound, it generally contains impurities from the manufacturing process and various chemical substances that are attached due to surface treatment suitable for its use. It is preferable to extract or wash with various solvents. Further, when dyeing a substrate with a dye, it is preferable to wash the dyed product with a water-soluble medium so that the dye does not fall off during use.

The present invention will be further explained below with reference to Examples.

Reference Example I Take 600ml of water in an IJ beaker and add 3ml of absorbent cotton into it.
0) and gently stir and heat to 30°C. Among these, Sumifix Turquoise Blue G
[Reactive dye manufactured by Juju Kagaku Co., Ltd.: Color index (C0■
. ) Add Reactive Blue 21'c2y and anhydrous sodium sulfate 30F and stir for 20 minutes, then add 12 parts of sodium carbonate, stir and keep warm for 15 minutes, and then raise the temperature to 70'C over 20 minutes. The reaction is terminated by incubating for 60 minutes.

The absorbent cotton dyed blue was separated in a Nutsch furnace, and transferred into 900 ml of water (Monogen, Daiichi Kogyo Seiyaku Co., Ltd.'s I purifier: alkylbenzene sulfonic acid sorter) at 1°8y-. Nooping for minutes. Separate the pieces in a Nutsch oven, wash thoroughly with water, and then dry. Further, the sample is washed with dimethyl sulfoxide, methanol-concentrated hydrochloric acid (volume ratio 50:1), methanol-ammonia water (volume/ft ratio 50:1), and methanol in this order until the washing liquid is no longer colored, and then dried.

When the obtained blue absorbent cotton was analyzed by atomic absorption spectroscopy, the copper content was found to be 0.065%. Therefore, l
y contains 1.0×10 moles of phthalocyanine skeleton.

The dyed product thus obtained is called Blue Line A.

Reference example 2 In a beaker of 21, add 1J of water, 25p of anhydrous sodium sulfate, C, I.

Add 1 part of Direct Blue 86 (Sumilite Supra Turquis Blue G Conc: a product of Sumitomo Chemical KK) and stir to dissolve. Soak 504 absorbent cotton in this dye bath,
Stir and keep warm at 5°C for 60 minutes. Next, the absorbent cotton is washed with water and dried to obtain blue absorbent cotton. (Hereafter, blue line B
That's what it means. ) Reference Example 3 200 g of copper phthalocyanine, 1200 g of sodium chloride and 3501 g of diethylene glycol were placed in a kneader and ground for 6 hours. Water 5I! The contents of the kneader Q which have been ground are added, stirred and then washed with water. Then, it is further washed with various solvents. The thus refined copper phthalocyanine has a surface area of 58 s2/g (BET method using nitrogen adsorption) and is extremely effective in adsorbing harmful substances. (hereinafter referred to as pigment) A cigarette filter was prepared using each of the materials obtained in Examples 1 to 3 and the highly water-absorbing material, and the inner diameter was 8rrr.
Fill a 15 m glass tube with a length of 15 m. The thus obtained filtered glass tube was attached to a constant flow type smoke suction device, and the results shown in Table 1 were obtained.

Both methods were shown to be more effective in selectively removing mutagens than in the absence of copper phthalocyanine compounds.

Table 1 (Note) Sumikagel: Sumikagel F-33 (super absorbent polymer manufactured by Sumikagaku Co., Ltd.) In the above table, the methods for measuring tar removal rate, mutagen removal rate, and suction resistance are as follows.

In other words, using a constant flow type smoke suction device, smoke suction time is 2 seconds/time,
The sample was smoked under the following smoking conditions: a smoke interval of 40 seconds, a smoke length of 50 seconds, and a smoke flow rate of 16 mt/second, and the mainstream smoke was collected using four Cambridge filters (M 1131 filters), and the amount of tar was measured gravimetrically.

Measured values are average values for 20 cigarettes, with 3 significant figures.
Digits were rounded off.

The mutagen removal rate was determined from the mutagenic activity by the Ames test, and the bacterial strain was TA98, tar collected in a Cambridge filter; The suction resistance was measured using a winding pressure type ventilation resistance measuring device at a flow rate of 20-7 seconds.

Claims (1)

[Claims] (1) A cigarette filter characterized in that a phthalocyanine compound and a highly water-absorbent material are present in a filter base material.