JP2575236B2 - Low foaming scouring agent for fibers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a low foaming scouring agent for fibers.

[0002]

2. Description of the Related Art Hitherto, as a low-foaming scouring agent for fibers, an alkylene oxide block of a branched alcohol and a random adduct have been known (for example, JP-A-62-69).
71).

[0003]

However, recently, in the field of synthetic fibers, the number of differentiating materials for using various mixed yarns, irregular cross-section yarns, and different shrinkage yarns has increased. More sizing oils have been attached than before.

Further, these new materials are subjected to a relaxing treatment using a liquid jet dyeing machine or the like in order to take advantage of their properties. However, in continuous scouring such as ordinary open soap and boil-off, these oils and pastes are used. It is common to use a low foaming scouring agent in the relaxation step due to insufficient removal of the agent. In such a situation, in the conventional low-foaming scouring agent, these sizing agents, the removability of the oil agent, the emulsifying property has become difficult, and the occurrence of smoking due to the residual or reattachment of the oil agent or the sizing agent, the weight loss spots, Various problems such as staining spots and wrinkles have occurred.

[0005] To achieve the above object, the present inventors have:
As a result of investigating various compounds, they succeeded in developing a high-performance scouring agent with low foaming properties, and reached the present invention.

[0006]

Means for Solving the Problems That is, the present invention has the general formula _{RO (PO) l (EO)} m (PO) n H (1) ( wherein, R represents a saturated or unsaturated 16 to 24 carbon atoms Wherein PO represents a block addition unit of propylene oxide, EO represents a block addition unit of ethylene oxide, 1 is 3 to 20, m is 6 to 50, and n is 1
A low foaming fine paste composed mainly of a compound represented by 5 of an integer).

In the compound of the general formula (1), the straight-chain hydrocarbon group may be a saturated or unsaturated straight-chain alcohol having 16 to 24 carbon atoms, ie, cetyl alcohol, oleyl alcohol, stearyl alcohol, and behenyl alcohol. Groups are preferred. l is 3-20, preferably 5-15. If l is less than 3, low foaming properties will not be obtained, and if it is greater than 20, scourability will decrease. m is 10-5
0, preferably 15 to 40. If m is less than 10, the water solubility is low, and if it is more than 50, the refining property is reduced.
n is 1-5, preferably 2-4. When n is less than 1, low foaming property is not obtained, and when it is more than 5, scourability is reduced. The number of moles of all EO in the compound of the general formula (1) is preferably at least twice the number of moles of all PO.

The object of the present invention cannot be achieved when ordinary alkylphenols and their aldehyde condensates, secondary alcohols and branched primary alcohols are used. EO and PO are limited to block adducts, and random adducts do not achieve the object of the present invention.

The compound represented by the general formula (1) can be prepared by a conventional method, that is, using a straight-chain alcohol with an alkali catalyst such as caustic soda, caustic potash, and methylate under pressure.
It can be easily manufactured by sequentially adding predetermined amounts of EO and PO at 40 to 170 ° C.

[0010] The scouring agent of the present invention may contain, if necessary, a nonionic activator, an anionic activator ordinarily used in the scouring step.
A builder, a chelating agent and the like may be used in combination.

The scouring agent of the present invention comprises synthetic fibers, natural fibers,
And these blended woven fibers.
Examples of the synthetic fibers include polyester, nylon, acrylic, and triacetate fibers.

The natural fibers include cotton, hemp, wool and the like. As the blended interwoven fibers, these blended interwoven fibers can be mentioned.

Of these, particularly in the field of synthetic fibers, recently, there have been an increase in the number of differentiating materials using various mixed fiber products, modified cross-section yarns, and different shrinkage yarns. , Has been attached more than before, these low-foaming scouring agents in the past, these pastes,
Although removal and emulsifying properties of oils have become difficult, the present invention is remarkably effective in removing and emulsifying these oils.

[0014] In recent greige machines, the scouring agent first strongly adsorbs and orients on the fiber and the oil agent, and then removes the oil agent from the fiber by the emulsification, dispersion and desorption actions peculiar to the surfactant. It is considered necessary.
From the above, stearyl alcohol, oleyl alcohol, etc., as a hydrophobic group to some extent is considered to be effective, straight chain is effective, nonylphenol as a hydrophobic group, lauryl alcohol, branched alcohol is a fiber,
Adsorption and orientation to oils etc. are weak. Propylene oxide block-added next to the alcohol residue becomes a balancer between ethylene oxide, which is the next strong hydrophilic group, and stearyl group, which is a strong hydrophobic group, and is considered to exhibit an affinity for oil agents. In addition, since a small amount of propylene oxide at the end is branched by a methyl group, the scouring agent of the present invention that exhibits foam breaking properties has low foaming properties. Ideal for hating scouring.

The amount of the scouring agent used in the present invention is generally 0.05 to 10 g / l, preferably 0.1 to 5 g / l for synthetic fibers, and if necessary, alkali builder is usually 0.2 to 5 g / l.
l Use together. The bath ratio of the treatment bath is not particularly limited, but is usually 1: 4 to 1:30, preferably 1: 4 to 1:15, and exhibits excellent effects in a low bath ratio region.

The scouring temperature can be selected depending on the type of fiber to be applied, but is usually 50 ° C. to 140 ° C.

The pH of the scouring bath can be arbitrarily selected depending on the type of the fiber to be applied, but is usually 3 to 14, preferably 4 to 13.

[0018]

EXAMPLES The present invention will be further described with reference to the following Examples, but it should not be construed that the present invention is limited thereto. Also,
The test methods in the examples are shown below.

Test method (1) Foaming test A test solution [0.3 g of scouring agent /
1 (in terms of solid content), caustic soda 1.0 g / l], 150 ml of air, with a No. 2 ball filter at the tip, aerating air from the bottom of the graduated cylinder for 6 seconds at 6 l / min, then stopping. Immediately after, foaming was measured 10 seconds and 30 seconds later and expressed in mm.

(2) Refining test 2-1. Residual fat ratio measurement A non-sizing oil-adhered polyester green fabric was scoured under the following conditions, and extracted with ethyl ether using a rapid residual fat extraction device (manufactured by Tokai Keiki) to determine the residual fat ratio.

2-2. Determination of emulsifying property after scouring The scouring bath scoured under the following conditions is taken out, and the emulsified state after cooling for 24 hours is visually judged.

(Judgment): ◎ Completely transparent solubilized ○ Uniformly emulsified (translucent) △ Cloudy dispersed × Non-uniform and scum on upper (lower) part

(Scruuring conditions) Test cloth: Non-sizing oil-adhered polyester (Grease residue ratio: 2.80%) Scouring bath: Scouring agent 1.0 g / l Caustic soda 1.0 g / l Scouring temperature: 120 ° C. Scouring time: 20 minutes Bath Ratio: 1:10 Washing with water: Washing with running water × 30 seconds Drying: 90 ° C. × 15 minutes Testing machine: Mini color dyeing machine (Texam Giken)

[Table 1]

[Table 2]

(Equation 1)

(Results) When the compound of the general formula (1) according to the present invention was used, the removability was improved by 15% or more and the emulsifiability was remarkably improved as compared with the comparative compound. Further, the compound of the present invention has high scouring and low foaming properties, but none of the comparative compounds satisfy the performance of both high scouring and low foaming properties.

[0025]

The scouring agent of the present invention is a low-foaming scouring agent. However, there is no decrease in the refining ability of the conventional low-foaming scouring agent. Compared to those based on ethylene alkyl ether, etc.), it shows the same or better scouring properties. It is extremely effective.

Until now, it was difficult to remove the oil from the greige machine, and there was a tendency that troubles such as generation of smoke during the intermediate setting, wrinkles in the dyeing process, and irritation increased. By using this, it became possible to solve this problem.

The scouring agent of the present invention is economically advantageous because it can be produced from relatively inexpensive alcohols as starting materials, unlike primary branched alcohols.

Claims (1)

(57) [Claims] 1. A fiber for low foaming fine paste composed mainly of a compound represented by the following general formula. RO (PO) _l (EO) _m (PO) _n H (1) (wherein, R represents a saturated or unsaturated linear hydrocarbon group having 16 to 24 carbon atoms, and PO represents a block addition unit of propylene oxide. EO represents an ethylene oxide block addition unit, 1 is 3 to 20, m is 6 to 50, and n is 1
Is an integer from 5 to 5)