China Textile Institute

Jongfu Wu

Shin-Chuan Yao

Wen-Tung Chen

Kun-Lin Cheng

Yu-Cheng Wang

Feng Biau Lin

Cheng Kun Lin

Tsung-Wun Tsai

Judson Lee

Wei-Chin Wu

Li-Ren Wang

Fu-Fong Chang

Shin Chuan Yao

A-Fen Huang

A method for synthesizing 1,4-bis(4-aminophenoxy)naphthalene and a series of polyamides, polyimides and copoly(amide-imide)s derived from the said compound is disclosed. These polymers possess excellent thermal stability and mechanical strength.

Method for preparing 1,4-Bis(4-aminophenoxy)naphthalene and its polymers

A blocked hydrophilic polyurethane with molecular weight of 500.about.40,000, 5.about.70% solid content and 5.about.200 milliequivalent per 100 g polymer of sulfonic acid salt, can be prepared from following reactants:

Manufacturing method for blocked aqueous dispersion of polyurethanes

An improved method of reaction of water PU resins for improving the blocking reactions of beta-dicarbynal compounds and polisocynantes, and reducing the reaction time for water PU blocking, wherein the construction is: ##STR1## wherein: R.sub.1,R.sub.2,R.sub.3,R.sub.4 =hydrogen or alkyl group n.sub.1 =1.about.100 n.sub.2, n.sub.3, n.sub.4 =1.about.10 The blocking agents of beta-Dicarbonyl compounds are reduced by D.sub.1 and D.sub.2 which are used in the blocking reactions of water PU.

Method for aqueous polyurethane blocking reaction

This automatic admixtrue dosing and pH value control batch dyeing system is comprised of a pH value gauge, a thermometrer, a pump for adding chemicals, a drain valve, a chemical tank, a continuous action depth gauge, a mixing valve, and a chemical input valve. The controller is designed to proceed according to several chemical graphs located inside the controller. The user, depending on the requirment of chemical dosing and pH value control, sets the time for inputting chemical and a predetermined pH value. When this is done, the controller, according to the selected chemical graphs and target pH values, operates the chemical pump, the mixing valve, and the chemical dosing valve. The chemical module flow into action, and the dye liquor in the chemical tank flow into the dye machine. The depth gauge, the pH gauge and the thermometer measurs the volume of liquid in the chemical tank, and the pH value and temperature of the dye liquid in the dye machine. The information is individually fed back to the controller which can automatically monitor the dye liquor pH value and chemical condition. The final stage consists of the automatic control of the chemical volume and pH value.

Batch dyeing system with automatic chemical-dosing and pH control system

A low temperature microemulsion dyeing process for polyester fibers includes the steps of microemulsifying a swelling agent in water to form a continuous microemulsion solution, adding dyestuff and a dye solubility assistant agent selected from the group of short chain alcohols, dyeing polyester fibers at room temperature for 1-3 hours, washing the polyester fibers with a nonionic washing agent and thereafter drying the dyed polyester fibers.

Low temperature microemulsion dyeing process for polyester fibers

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Taipei Hsien, Taiwan

Jongfu Wu