Method of preparing block polyurethane microcapsule composite finishing agent

Abstract

A preparing method for a compound finishing agent for micro capsule of blocking polyurethane is provided, which comprises the following procedures: a) preparing the pre-polymer of the blocking polyurethane; adjusting the content of hard blocks with the composition and content of fixing soft blocks not changed, so that the inversible phase composes rich soft blocks and short hard blocks, and fixing phase composes rich hard blocks; b) adding the pre-polymer of the blocking polyurethane and the phase-transformation material in certain proportion into some water solution containing emulsifier to form a water-wrapped-oil emulsion system; when the emulsification goes to such stage as the diameter of micro capsule meets requirement, some chain extender and cross-linking agent are added, they are mixed for certain time under thermostatic condition, now emulsion of compound finishing agent for micro capsule of blocking polyurethane taking blocking polyurethane as wall of the micro capsule and phase-transformation material as the core of the micro capsule is obtained. The invention uses the same chemical substrate-polyurethane, so the requirement from the compound finishing agent on assistant, the formula of the finishing liquid and the finishing process are basically equivalent, thereby the synergy between air permeability, moisture permeability and temperature adjusting can be achieved well.

Description

technical field

[0001] The invention relates to a fabric finishing agent, in particular to a preparation method of a block polyurethane microcapsule composite finishing agent. Background technique

[0002] Today, the comfort of clothing fabrics is the primary indicator for consumers when purchasing clothing. The comfort of the fabric is mainly reflected in the comfort of the skin, that is, the fabric has good breathability and moisture permeability. Common breathable and moisture-permeable fabrics are prepared by laminating or coating a layer of breathable and moisture-permeable film on the fabric. Such membrane materials are usually polytetrafluoroethylene (see Chinese patents CN 1414169 and CN 2546479) or polyurethane (see US patents US 5,234,525 and US 5,208,313). At the same time, in modern life, the functionality of fabrics (functional textiles such as antibacterial, anti-mosquito, anti-concealment, far-infrared, anti-ultraviolet, temperature adjustment, humidity adju...