AN AQUEOUS DETERGENT COMPOSITION FOR LOW-PRESSURE FOAM GENERATOR BACKGROUND OF THE INVENTION Field of The Invention The present invention relates to an aqueous detergent, particularly, to an aqueous detergent composition capable of cleaning polyurethane remaining in a chamber of a low-pressure foam generator.

Disclosure of The Prior Art When polyurethane was produced by a foam generator, a small amount of polyurethane generally remains in a chamber of the foam generator. Thus, it is required to completely remove the residue of high-molecular polyurethane substances. High-pressure foam generators were generally cleared out by means of pneumatic or cleaning piston.

It is possible to clear out the polyurethane remaining in a low-pressure foam generator only by using methylene chloride ("MC"). However, the following problems may arise.

First, the MC detergent not only adversely affects the health of worker and stability in the working place, but also causes serious environmental contamination and pollution.

Second, carcinogenic substances contained in the MC detergent cause cancer, vomiting or dermatological diseases when contacting the human body, and can be fatal to the human body when used in a prolonged period of time.

To solve these problems, the inventor has filed Korean Patent No. 259280 (April 13,1998) entitled"Aqueous Detergent for Low-Pressure Foam Generator"and Korean Patent Application No. 1999-65364 (December 23,1999) entitled "Aqueous Detergent for Low-Pressure Foam Generator".

Apparently, these two prior art aqueous detergents are very useful because they do not injure the worker's health or cause pollution problems, and especially because they contain neither carcinogenic substances nor VOC regulation substances.

The inventor has kept studying to develop an environment-friendly aqueous detergent having no solvent, and has finally developed"Biogenic-190SF (trade name)" (Conc. Type).

SUMMARY OF THE INVENTION The first object of this invention is to provide a solventless aqueous detergent composition for a low-pressure foam generator.

The second object of this invention is to provide an environment-friendly aqueous detergent.

The third object of this invention is to provide an aqueous detergent composition for a low-pressure foam generator, which contains neither carcinogenic nor VOC regulation substances.

The fourth object of this invention is to provide an aqueous detergent composition which is harmless to the human body.

To achieve these objects, this invention provides an aqueous detergent composition for a low-pressure foam generator, comprising 94.7 to 55% of water, 0.3 to 5. 0% of a mixture of modified silicone with polyether, and 5. 0 to 40% of polytetramethylene ether glycol ("PTMEG").

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred examples of the invention are described in detail hereinto. Only the descriptions necessary for the understanding of this invention are provided, and the other descriptions are omitted so as not to make the gist of the invention unclear.

The aqueous detergent composition according to the invention can be used to clear out high-molecular polyurethane remaining in a chamber of a low-pressure foam generator. The composition comprises water, a mixture of modified silicone with polyether, and PTMEG. The aqueous detergent composition is produced by mixing and stirring the components.

The following examples illustrate the invention without in any way limiting its scope.

Examples Examples 1 7% of a mixture of modified silicone with polyether and 8% of PTMEG were added to 91.3 % of water. They were mixed and stirred by a mixer to produce an aqueous detergent (Biogenic-190SF).

The conditions for cleaning the inside of the chamber of the low-pressure foam generator with the aqueous detergent prepared from the above composition are given in Table 1 below.

Table 1 Temperature (°C) Temperature of detergent (C) 59-60 Temperature of heater (C) 60 Pressure (bar) Pressure of detergent (bar) 2.3-2.5 Pressure of air flushing (bar) 4.5-5 Discharge amount per sec (g/sec) 99.4 Total discharge amount (3.5 348-350 sec/once) Cycle of twice/day (lunch time and closing time) replacement As can be seen in the above table, the aqueous detergent composition according to this example has advantages as follows.

First, the detergent of the present invention is harmless to the human body, and contains no VOC regulation substance. Thus, it can prevent the environmental contamination.

Second, the aqueous detergent of the present invention contains even a biodegradable component such as BOD, thus exhibits detergency equal to or higher than the prior art detergents.

Third, the detergent of the present invention can completely clear out the chamber inside of the low-pressure foam generator, and protect the workers from noxious substances.