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Preparation method of organic/inorganic silicon composite modified waterborne polyurethane extinction resin

A technology of water-based polyurethane and matting resin, which is applied in polyurea/polyurethane coatings, coatings, fireproof coatings, etc., can solve the problems of expensive sulfonic acid-type hydrophilic chain extenders, unfavorable industrial production, eye and skin damage, etc. Achieve high industrial application value, reduce gloss, and low cost

Inactive Publication Date: 2017-05-31
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 104974324 discloses a preparation method of reactive self-dulling water-based polyurethane matting resin. The patent introduces two kinds of hydrophilic chain extenders, carboxylic acid type and sulfonic acid type, into the water-based polyurethane system at the same time, and the carboxylic acid type hydrophilic chain extender Hydrophilic chain extender is a commonly used hydrophilic chain extender, but the price of sulfonic acid type hydrophilic chain extender is relatively expensive, which is not conducive to industrial production
Chinese patent 103113554 discloses a method for preparing a UV-curable matting resin. Firstly, the polyadipate-1,4-butylene glycol ester diol and trimethylolpropane are reacted with diisocyanate after water removal to obtain the first intermediate body, and then react the first intermediate with hydroxy silicone oil, hydroxyphenyl sulfide and hydroxy-terminated acrylate under the action of a catalyst and a polymerization inhibitor to obtain a UV-curable matting resin, in which both diisocyanate and hydroxy-terminated acrylate are used dropwise The way of adding is added, the preparation process is more complicated, and the ultraviolet light source has great damage to human eyes and skin

Method used

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  • Preparation method of organic/inorganic silicon composite modified waterborne polyurethane extinction resin
  • Preparation method of organic/inorganic silicon composite modified waterborne polyurethane extinction resin
  • Preparation method of organic/inorganic silicon composite modified waterborne polyurethane extinction resin

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Add 5.5g of PTMG and 22.0g of PDMS into a reactor equipped with a stirrer, reflux condenser, and thermometer, and remove water under vacuum at 110°C for 1h; then cool down to 80°C and add 11.6g of IPDI and 0.01g of catalyst DBTDL to react for 2h; Then lower the temperature to 60°C and add 1.5g DMPA, raise the temperature to 80°C for 3h; add 2.1g SiO 2 Dissolve in 20ml methyl ethyl ketone, ultrasonically disperse for 10min, then add to the reaction system and react for 30min; cool down to room temperature and add 1.1g TEA to neutralize and react for 10min to obtain water-based polyurethane prepolymer; prepolymer is stirred at 2500r / min After emulsifying for 10 minutes, first add 128.7g of deionized water and then immediately add 1.5g of EDA to make the remaining -NCO in the emulsion react completely, and add 4.2g of PAAS during the emulsification process to maintain SiO 2 of stability. The butanone was removed by rotating the emulsion at 40° C. to obtain an organic / inor...

Embodiment 2

[0032] Add 5.5g of PTMG and 22.0g of PDMS into a reactor equipped with a stirrer, reflux condenser, and thermometer, and remove water under vacuum at 110°C for 1h; then cool down to 80°C and add 11.6g of IPDI and 0.01g of catalyst DBTDL to react for 2h; Then lower the temperature to 60°C and add 1.5g DMPA, raise the temperature to 80°C for 3 hours; dissolve 1.7g talc powder in 20ml methyl ethyl ketone, ultrasonically disperse it for 10min, then add it to the reaction system and react for 30min; cool down to room temperature and add 1.1g TEA to neutralize React 10min to obtain the water-based polyurethane prepolymer; the prepolymer is emulsified for 10min at a stirring rate of 2500r / min, and 1.5g EDA is added immediately after adding 128.7g deionized water to make the remaining -NCO in the emulsion react completely. Add 3.4g PAAS to maintain SiO during emulsification 2 of stability. The butanone was removed by rotating the emulsion at 40° C. to obtain an organic / inorganic sili...

Embodiment 3

[0034] Add 5.5g of PTMG and 22.0g of DHPDMS into a reactor equipped with a stirrer, a reflux condenser, and a thermometer, and remove water under vacuum at 110°C for 1h; then cool down to 80°C and add 11.6g of IPDI and 0.01g of catalyst DBTDL to react for 2h; Then lower the temperature to 60°C and add 1.5g DMPA, raise the temperature to 80°C for 3h; add 1.3g SiO 2 Dissolve in 20ml methyl ethyl ketone, ultrasonically disperse for 10min, then add to the reaction system and react for 30min; cool down to room temperature and add 1.1g TEA to neutralize and react for 10min to obtain water-based polyurethane prepolymer; prepolymer is stirred at 2500r / min After emulsifying for 10 minutes, first add 128.7g of deionized water and then immediately add 1.5g of EDA to make the remaining -NCO in the emulsion react completely, and add 2.6g of PAAS during the emulsification process to maintain SiO 2 of stability. The butanone was removed by rotating the emulsion at 40° C. to obtain an organi...

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Abstract

The invention relates to a preparation method of organic / inorganic silicon composite modified waterborne polyurethane extinction resin, and belongs to the field of coating industry. Organic silicon substituting part of polyether polyol reacts with diisocyanate under the action of a catalyst, a chain is extended by using a hydrophilic chain extender, then inorganic silicon is introduced, the solution is neutralized by using a salt forming agent, and the extinction resin is obtained after termination the chain extender, wherein the inorganic silicon stably exists in the system under the action of a stabilizer. The organic silicon having the characteristics of low surface energy and poor computability with waterborne polyurethane is introduced into the waterborne polyurethane system in a copolymerization manner and migrated to the surface in the film forming process of emulsion, thereby achieving the effects of microscopic roughness and extinction; and the inorganic silicon is simultaneously introduced to further reduce the glossiness, so that the thermal stability of the resin is improved. The preparation method is simple, safe, environment-friendly and relatively low in cost, and has relatively high industrial application values.

Description

technical field [0001] The invention relates to a preparation method of organic / inorganic silicon composite modified waterborne polyurethane matting resin, which belongs to the field of paint industry. Background technique [0002] Waterborne polyurethane is a binary colloidal system formed by dissolving or dispersing polyurethane in water with water as the dispersed phase. Waterborne polyurethane has the characteristics of non-toxic, non-flammable, non-polluting, safe and reliable, easy to operate and modify, so it is widely used in the fields of coatings, adhesives and leather finishes. The matting coating has an elegant, soft and natural appearance, which meets the needs of people's lives and is favored by consumers. Synthetic matting resin can avoid the defects of poor emulsion stability, increased emulsion viscosity, and decreased scratch resistance of the film caused by direct addition of matting powder, and has received widespread attention. Chinese patent 104974324...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C08G18/48C08G18/61C08G18/75C08G18/34C08G18/66C08G18/12C08G18/32C08J5/18
CPCC08G18/0823C08G18/12C08G18/3228C08G18/348C08G18/4854C08G18/61C08G18/6685C08G18/6692C08G18/755C08J5/18C08J2375/08C08J2433/02C08K2201/014C08L2203/16C09D5/18C09D7/61C09D7/65C09D175/08C08L33/02C08K3/36C08K3/34
Inventor 罗运军马少宇柴春鹏葛震
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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