JP2006299494A - Polyester-based treatment agent and article treated with the treatment agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve durability of washing resistance of an antistatic agent of a conventionally known polyester-polyether block copolymer. <P>SOLUTION: The polymer treatment agent comprises a polymer as a main component that is a block copolymer of a polyester composed of aromatic dibasic acids such as terephthalic acid, isophthalic acid, etc., as acid components and ethylene glycol as a glycol component and a polyethylene glycol containing one terminal substituted with a 1-5C alkyl group and has 5,000-15,000 molecular weight and 50-90°C crystal melting point. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is mainly treated with a polyester-based treatment agent that imparts durable antistatic properties, absorption properties, anti-recontamination properties, antifouling properties, etc. to synthetic fibers such as polyester, films, etc., and the treatment agents. It relates to processed products.

  Conventionally, antistatic agents using block copolymers of aromatic polyesters and polyalkylene glycols, especially antistatic agents for textile products mainly composed of polyester-based synthetic fibers, have been known to improve antistatic properties. The effect is mentioned (for example, patent document 1, patent document 2, patent document 3).

  Japanese Patent Publication No.46-13197   Japanese Patent Publication No.53-46960   JP 2002-212297 A

The polyester treating agents described in the above Patent Documents 1 to 3 treat polyester synthetic fiber products as an aqueous dispersion, but are disadvantageous in lack of durability such as washing resistance.
The object of the present invention is to provide not only the washing resistance of the treatment agent to be improved, but also to impart durable absorbability, recontamination prevention property, and antifouling property to films and sheets.

  That is, the present invention relates to a polyester comprising terephthalic acid as an acid component, or terephthalic acid and isophthalic acid, or sulfoinphthalic acid, ethylene glycol as a glycol component, and one end of which is substituted with an alkyl group having 1 to 5 carbon atoms. A block copolymer with glycol having a molecular weight of 5,000 to 15,000 and a crystalline melting point (measured with a differential scanning calorimeter, the second scanning endothermic peak is the melting point) of 50 ° C. to 90 ° C. By using a polyester-polyethylene glycol block copolymer mainly composed of the above as a treating agent, durable antistatic properties and the like are imparted. The amount of isophthalic acid and / or sulfoisophthalic acid used in the acid component is preferably about 5 to 10% by weight based on the total acid component weight including terephthalic acid.

  When the molecular weight of the treatment agent is 5,000 or less, the treatment agent can be attached to an article to be treated such as a fiber product, but the adhesion is weak and the durability is poor. Further, when the molecular weight is 15,000 or more, the water dispersibility is deteriorated, and a large amount of a surfactant is required to disperse this, and the standing stability of the aqueous dispersion is also poor, and there is a drawback that gelation easily occurs. . In addition, the use of a large amount of a surfactant hinders the adhesion between the polyester-based processing agent and the fibers, and the durability such as washing resistance is lowered.

In addition, by adjusting the crystal melting point of the treatment agent to 50 ° C. to 90 ° C., the effective component of the treatment agent is adsorbed on the article to be treated such as fiber and heat-set, and this effectiveness and the article to be treated are obtained. To improve the adhesion and increase the durability such as washing resistance.
When the crystal melting point is low, the adhesion between the treatment agent and the article to be treated is weak as in the case of the molecular weight, and durability such as washing resistance is poor. In addition, in the case of a crystalline polymer having a crystal melting point of 90 ° or more, the dispersion in water becomes poor, and a large amount of surfactant is used. Deteriorates and durability such as washing resistance decreases.

  Since the treatment agent of the present invention uses polyethylene glycol in which one end is substituted with an alkyl group having 1 to 5 carbon atoms, naturally at least one end or both ends are blocked with the above alkyl group. It is a polymer mainly composed of a polyester-polyether block copolymer.

Since this type of conventional treating agent uses a block copolymer in which the number of moles of aromatic polyester is larger than the number of moles of polyethylene glycol, many of them have an aromatic group at the terminal.
The treatment agent of the present invention is different from conventional treatment agents because the molar ratio of polyethylene glycol having an alkyl group bonded to the terminal and the polyester is 1: 1.5 or more.

  The alkyl group bonded to the end of polyethylene glycol has a low molecular weight of 1 to 5, and a methyl group or an ethyl group is particularly preferable. The terminal alkyl group-substituted polyethylene glycol needs to occupy 80% by weight or more of the total substituted polyethylene glycol. Examples of other end groups include long-chain aliphatic alkyl groups, aromatic alkyl groups, alicyclic groups, and heterocyclic groups, but the amount used must be less than 20% by weight in polyethylene glycol. .

  The treating agent of the present invention is used by adding an emulsifier if necessary, stirring in water, and adjusting to a water dispersion of usually 4 to 15% by weight. In actual processing, this treatment agent is applied so as to be 5 to 15% by weight based on the article to be treated. The article to be treated is then preferably heat treated at a temperature above the crystalline melting point.

  The products to be treated to which the treatment agent of the present invention is applied include plastic products such as polyester, polyamide, polyethylene, and polypropylene, particularly fiber products, films, and sheets mainly composed of polyester. A textile product is preferred.

  The polyester-polyether block copolymer of the present invention has better water dispersibility than conventional ones, and it is not necessary to use a large amount of surfactant for dispersion. It is possible to prevent a decrease in durability.

In addition, the block copolymer does not cause a cloud point phenomenon in a humidified state during exhaustion processing to the article to be treated, and is adsorbed to the article to be treated in a molecular dispersion state. As a result, the active ingredient can be adsorbed uniformly on the fiber, and nano-order molecular adsorption is possible. Fusion with the active ingredient, especially when the product to be processed is polyester, ideally eutecticization of both occurs. The film exhibits good adhesion that greatly affects the durability such as washing resistance, and so-called nano-micron order processing is achieved.

Next, the present invention will be described with reference to examples. Various characteristics in the examples were measured by the methods shown in the following table.

Example of production of polyester-polyether block copolymer

After polymerization, terephthalic acid, isophthalic acid, sulfoisophthalic acid, and polyethylene glycol with one terminal substituted with a substituent are mixed so as to have the component ratios shown in Table 2, and a small amount of catalyst is added. The reaction was carried out for 180 minutes, and the theoretical amount of methanol was distilled off to complete the transesterification reaction. Next, a small amount of catalyst was added thereto, and this was reacted under reduced pressure of 5 mmHg at 260 ° C. for 20 minutes and further at 0.1 mmHg for 30 minutes to obtain a copolymer. Table 2 shows the component weight ratios and characteristics of the polymer.

The copolymer of the component ratio in the column of Example 1 of Table 2 was dispersed in water to obtain an aqueous dispersion of about 10% by weight.
Next, the polyester taffeta cloth was collected so that the 10% aqueous dispersion shown above was 7% of the taffeta weight, and the ratio of the dough to the treatment liquid (hereinafter abbreviated as bath ratio) was adjusted to 1:30. A treatment bath was prepared. Under the treatment temperature, the treatment liquid was colorless and transparent, and the treatment components were completely dispersed in the liquid. The cloud point phenomenon at the treatment temperature generally observed in a dispersion of a copolymer of polyester and polyethylene glycol was not observed, and aggregation of the components in the liquid was not observed. After exhaustion of the processing agent to the polyester fiber, reduction cleaning treatment was performed according to a conventional method, and then heat treatment was performed at 180 ° C. for 1 minute.
As shown in Table 3, the friction band voltage and water permeability of this anti-storage cloth showed good results both before and 20 minutes after washing.
Table 3 shows the results of the friction band voltage and water permeability of the work cloth of this example and the work cloth of Comparative Example 1 described later.

As shown in the column of Example 2 in Table 2, methyl terephthalate, methyl isoterephthalate, ethylene glycol and polyethylene glycol having a molecular weight of 2500 at one end are polymerized, and each residue is 200 parts, It mixed so that it might become 20 parts, 60 parts, and 720 parts, and it superposed | polymerized as shown to the manufacture example after that, and obtained crystalline white resin. The melting point of the resin was 52 ° C. This resin was remelted at 200 ° C., and the melt was dropped into hot water at 40 ° C. to obtain a dispersion so that the resin component was 10%.
Using this solution, the polyester processed yarn fabric was subjected to antistatic treatment under the same conditions as in Example 1. After 20 home washings of the obtained processed fabric, the frictional band voltage was 350 volts and the water permeability was 1 second or less. Moreover, the anti-recontamination property of the processed cloth by the artificial soil solution was much better than that of the yarn processed cloth.

Comparative Example 1

Dimethyl terephthalate, dimethyl isoterephthalate, ethylene glycol and polyethylene glycol having an average molecular weight of 3000 and having a phenyl group at one end are polymerized and mixed so that the respective residues are 170 parts, 40 parts, 710 parts and 40 parts. A small amount of catalyst was added, and polymerization was carried out under the same conditions as in Example 1.
The obtained resin was a wax-like opaque massive resin. The crystal melting point was 40 ° C. and the average molecular weight was 760. The resin was melted at 150 ° C. as in Example 2 and dropped into hot water to obtain a milky white dispersion. Using this treatment solution, taffeta was treated under the same conditions as in Example 1. From around 70 ° C., the treatment liquid increased in turbidity and caused a cloud point phenomenon.
The treatment liquid became transparent after the active ingredient was exhausted by the fibers. The processed taffeta shows that the active ingredient is adsorbed in the form of fine particles.
The friction band voltage and water permeability of the work cloth were measured. The results are shown in Table 3 together with the table in Example 1. From this, the performance of this processing agent, particularly the performance after 20 washes, shows inferior results.
This is because the active ingredient aggregates in the exhaust bath and is adsorbed onto the fiber in the molecular aggregate state, so that the aggregate falls off by washing, the frictional voltage becomes high, and the washing resistance is inferior. As a result.

Claims (4)

  Block copolymer of terephthalic acid as an acid component, or a polyester composed of terephthalic acid and isophthalic acid or sulfoisophthalic acid and ethylene glycol as a glycol component, and polyethylene glycol substituted at one end with an alkyl group having 1 to 5 carbon atoms A polymer treating agent mainly composed of a polymer having a molecular weight of 5,000 to 15000 and a crystal melting point (measured with a differential scanning calorimeter and having a second scan endothermic peak as a melting point) of 50 ° C. to 90 ° C. .   The polymer treatment agent according to claim 1, wherein the polyethylene glycol substituted at one end with an alkyl group having 1 to 5 carbon atoms is 80% by weight or more based on the total amount of the one-end alkyl group-substituted polyethylene glycol.   An article to be treated treated with the polymer treating agent according to claim 1.   The article to be treated according to claim 3, wherein the article to be treated is a fiber product mainly composed of polyester fibers.