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Method of preparing block polyurethane microcapsule composite finishing agent

A technology of polyurethane microcapsules and finishing agents, which can be used in fiber treatment, textiles and papermaking, and can solve the problems of single-function finishing agents

Inactive Publication Date: 2008-01-23
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, people have developed many functional finishing agents for textiles, but most of them are single-functional finishing agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0009] The invention provides a method for preparing a block polyurethane microcapsule composite finishing agent, comprising the following steps:

[0010] a) Prepare a block polyurethane prepolymer composed of a soft segment phase and a hard segment phase, and adjust the hard segment content under the condition that the composition and content of the soft segment are fixed, so that the reversible phase is composed of a rich soft segment phase and a short hard segment Phase composition, the stationary phase is composed of a hard segment phase, based on solid content, the mass percentage of the hard segment phase is 20%-50%, and the mass percentage of the soft segment phase is 80%-50%;

[0011] b) Then, the prepared block polyurethane prepolymer and the phase change material are added in a certain ratio to the aqueous solution containing the emulsifier under the condition of rapid stirring, and after emulsification until the particle size of the microcapsule meets the requirement...

Embodiment 1

[0026] The soft segment phase components of the dibutyltin laurate comprising 0.02g, polyethylene glycol (molecular mass 3000, dried), 10g of toluene diisocyanate and 3g of 1,4-butanediol in dry nitrogen protection, 70-80°C reaction temperature, and stirring reaction for 3-4 hours to obtain a polyurethane prepolymer with a soft segment phase structure; then add 14g of 4,4'-diphenylmethane diisocyanate, 2g of 1,4- Butanediol, 3g of carboxyl-containing dimethylolpropionic acid and 1g of crosslinking agent triethanolamine hard segment phase components, at 50 ~ 60 ℃ reaction temperature, stirring continued reaction for about 2 ~ 3 hours, to obtain soft Segment phase and hard segment phase polyurethane prepolymer with block structure.

[0027] Get 55g of block polyurethane prepolymer and 40g of C 12 -C 32 Linear alkanes are added to the aqueous solution containing styrene-maleic anhydride copolymer and T-80 complex emulsifier under heating and rapid stirring to form an oil-in-wat...

Embodiment 2

[0030]Add 0.01g of dibutyltin laurate, 37.99g of polycaprolactone diol (molecular mass 3000), 9g of 2,4-toluene diisocyanate, and 3g of 1,4-butanediol into 500mL of the reversible phase components with a stirrer, In the reaction kettle with a thermometer and a reflux condenser, react at a temperature of 70-80° C. for 3-4 hours. Then lower the temperature to 45-55°C, add 4g of stationary phase components 1,4-butanediol, 3g of trimethylolpropane, 35g of 4,4'-diphenylmethane diisocyanate and 8g of dihydroxybutyric acid, and control the temperature After reacting at 50-60°C for 3-4 hours, a block polyurethane prepolymer composed of a reversible phase and a stationary phase is prepared.

[0031] Get block polyurethane prepolymer 18g and C 12 -C 32 Add 80 g of linear alkanes to the aqueous solution containing styrene-maleic anhydride copolymer and T-60 complex emulsifier under heating and rapid stirring, continue stirring, add 1 g of dimethylol butyric acid and trimethylol Propan...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/564D06M23/12
Inventor 张慧茹李冬霜吕幼军李荣光杨建
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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