No-auxiliary cotton fabric finishing agent and preparation method thereof
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A technology of cotton fabric and finishing agent, which is applied in fiber treatment, plant fiber, textiles and papermaking, etc., to achieve the effect of reducing preparation cost and good anti-wrinkle effect
Active Publication Date: 2013-03-27
汕头市雪果制衣实业有限公司
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Problems solved by technology
[0003]Traditional cotton fabric finishing agents often need to add additives such as penetrants and silicone softeners to improve the crease recovery angle of cotton fabrics. Adding additives increases the preparation cost, reduced productivity
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Embodiment 1
[0016] A kind of cotton fabric finishing agent without auxiliary agent, comprises end-capping type aqueous polyurethane emulsion, the molar ratio of IPDI and PPG, BDO, DMPA in the raw material of prepolymer is 1.3:1, and BDO accounts for 2% of prepolymer gross mass , DMPA accounts for 5% of the total mass of the prepolymer.
[0017] A preparation method of an additive-free cotton fabric finishing agent is as follows: firstly, IPDI, PPG and N-methylpyrrolidone are subjected to dehydration treatment. Add PPG and DMPA into the container, raise the temperature to 75°C, add IPDI and an appropriate amount of dibutyltin dilaurate catalyst, and react for 120 minutes. During the reaction, N-methylpyrrolidone of 15% of the total mass of the prepolymer was added to reduce the viscosity. After the reaction, add the small molecule chain extender BDO, and react for 90 minutes. Cool down to 40°C, add EMAO for capping, the amount of EMAO added is equal to the amount of -NCO in excess IPDI, ...
Embodiment 2
[0020] A kind of cotton fabric finishing agent without additives, comprising end-capped water-based polyurethane emulsion, the molar ratio of IPDI to PPG, BDO, DMPA in the raw material of prepolymer is 1.4:1, and BDO accounts for 2% of the total mass of prepolymer , DMPA accounts for 5% of the total mass of the prepolymer.
[0021] A preparation method of an additive-free cotton fabric finishing agent is as follows: firstly, IPDI, PPG and N-methylpyrrolidone are subjected to dehydration treatment. Add PPG and DMPA into the container, raise the temperature to 75°C, add IPDI and an appropriate amount of dibutyltin dilaurate catalyst, and react for 120 minutes. During the reaction, N-methylpyrrolidone of 15% of the total mass of the prepolymer was added to reduce the viscosity. After the reaction, add the small molecule chain extender BDO, and react for 90 minutes. Cool down to 40°C, add EMAO for capping, the amount of EMAO added is equal to the amount of -NCO in excess IPDI, r...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention discloses a no-auxiliary cotton fiber finishing agent which comprises blocked waterborne polyurethane emulsion, wherein the raw materials of a prepolymer include IPDI, PPG, BDO and DMPA; the molar ratio of the IPDI, PPG, DMPA to BDO is 1.3:(1-1.4):1; the BDO accounts for 2-3% of the total mass of the prepolymer; and the DMPA accounts for 5-6% of the total mass of the prepolymer. In the preparation method, after the prepolymer reaction, EMAO is added for blocking, and triethylamine neutralization salifying and water adding emulsification are performed to obtain light blue blocked waterborne polyurethane emulsion which serves as a cotton fabric finishing agent. When in use, the cotton fabric finishing agent can react with cellulose through heating deblocking to realize the function of a finishing agent. Without adding an auxiliary into a cotton fabric finishing agent prepared by the method, the preparation flow is shortened, the efficiency is improved, the cost is reduced, and the no-auxiliary cotton fiber finishing agent is a novel cotton fabric finishing agent.
Description
technical field [0001] The invention relates to an additive-free cotton fabric finishing agent and a preparation method thereof, belonging to the field of chemical industry. technical background [0002] Water-based polyurethane is a new type of polyurethane material that is environmentally friendly and has a good application prospect. In practical application, in order to modify the polyurethane or make the polyurethane react better with the target, the end-NCO group prepolymer can be end-capped and modified. Firstly, the isocyanate group in the polymerization stage is protected. When it is applied, it is unblocked by heating to react with the crosslinking agent or matrix to form a crosslinked or higher molecular weight product. This type of polyurethane has better performance in fabric finishing. performance. [0003] Traditional cotton fabric finishing agents often need to add additives such as penetrating agents and silicone softeners to improve the crease recovery a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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