Low-temperature soluble environment-friendly softener, preparation method and application thereof

Abstract

This invention provides a low-temperature soluble environmentally friendly fabric softener, its preparation method, and its application. The preparation method includes: S1: Adding long-chain fatty acids to a reaction vessel, heating to 90-100°C under nitrogen protection, maintaining this temperature for 10-15 minutes, then adding N-aminoethylpiperazine, followed by a catalyst, stirring until homogeneous, then heating to 110-120°C, and reacting for 2-3 hours to obtain a primary product; S2: Adding a quaternization modifier to the primary product obtained in step S1, continuing the reaction for 3-4 hours, and cooling to 80-100°C to obtain a quaternized primary product; S3: Adding glacial acetic acid to the quaternized primary product obtained in step S2, adjusting the pH to 5-6, and continuing to maintain the temperature for 1-2 hours to obtain the aforementioned low-temperature soluble environmentally friendly fabric softener. This invention addresses the fundamental structure of the fabric softener sheet by introducing steric effects of cyclic structures and quaternary ammonium salt cations into the fabric softener sheet structure through molecular design, thereby fundamentally solving the defects existing in the prior art.

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