A kind of preparation method of amphiphilic comb structure organosilicon-polyurethane graft copolymer

A technology of graft copolymer and comb structure, which is applied in the field of preparation of amphiphilic comb structure organosilicon-polyurethane graft copolymer, can solve the problems of insufficient dispersion stability and emulsification effect of waterborne polyurethane, and achieve excellent application Foreground, buffer collision, good dispersion effect

Active Publication Date: 2021-01-01
传化智联股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the insufficient dispersion stability and emulsification effect of water-based polyurethane in the prior art, and provide a method for preparing an amphiphilic comb-like structure organosilicon-polyurethane graft copolymer. Structural silicone-polyurethane graft copolymer has excellent dispersion stability and emulsification effect, making it have excellent application prospects in the fields of dispersants, stabilizers and emulsifiers

Method used

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  • A kind of preparation method of amphiphilic comb structure organosilicon-polyurethane graft copolymer
  • A kind of preparation method of amphiphilic comb structure organosilicon-polyurethane graft copolymer

Examples

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Embodiment 1

[0049] Mix 50.0 g of monohydrogen-terminated polydimethylsiloxane with a molecular weight of 500 and 16.0 g of 2,3-dihydroxypropyl methacrylate in an appropriate amount of isopropanol, and add 20 ppm of chloroplatinic acid, Heating to 75° C. for 4 hours, and then distilling off the solvent under reduced pressure to obtain modified polydimethylsiloxane for use.

[0050] After mixing 38.3g of toluene diisocyanate with 50.0g of trimethylolpropane polyethylene glycol monomethyl ether with a molecular weight of 1000 and 20.0g of polyethylene glycol with a molecular weight of 400, add 100ppm of triethylenediamine, and heat at 60°C React for 3.5 hours, then add the above-mentioned modified polydimethylsiloxane to the system and add an appropriate amount of butanone to dilute, continue the reaction for 2.5 hours, add 1.2g diethanolamine, control the temperature between 40-50°C, and react for about After 45 minutes, lower to an appropriate temperature and add 1.2g of acetic acid, conti...

Embodiment 2

[0054] Mix 100.0g of monohydrogen-terminated polydimethylsiloxane with a molecular weight of 1000 and 14.6g of 2,3-dihydroxypropyl acrylate in an appropriate amount of isopropanol, add 20ppm of chloroplatinic acid, and heat to React at 80°C for 3.5 hours, then distill off the solvent under reduced pressure to obtain modified polydimethylsiloxane for use.

[0055] After mixing 37.0 g of hexamethylene diisocyanate with 55.0 g of trimethylolpropane polyethylene glycol monomethyl ether with a molecular weight of 1100 and 30.0 g of polyethylene glycol with a molecular weight of 600, add 100 ppm bis(dimethylamino) Ethyl) ether, reacted at 70°C for 3 hours, then added the above-mentioned modified polydimethylsiloxane to the system and added an appropriate amount of butanone for dilution, continued the reaction for 2.5 hours, added 2.4g N-methyldiethanolamine, Control the temperature between 40-50°C. After reacting for about 45 minutes, lower it to an appropriate temperature and add 1...

Embodiment 3

[0059] Mix 150.0g of monohydrogen-terminated polydimethylsiloxane with a molecular weight of 1500 and 11.0g of cis-1,2-dihydroxy-3,5-cyclohexadiene in an appropriate amount of isopropanol, and add 30ppm of chloroplatinic acid was heated to 75°C for 3.5 hours, and then the solvent was evaporated under reduced pressure to obtain a modified polydimethylsiloxane for use.

[0060] After mixing 55.1 g of diphenylmethane diisocyanate with 60.0 g of trimethylolpropane polyethylene glycol monomethyl ether with a molecular weight of 1200 and 40.0 g of polyethylene glycol with a molecular weight of 800, add 200 ppm bis-(3-bis Methylpropylamino)amine, reacted at 80°C for 1.5 hours, then added the above-mentioned modified polydimethylsiloxane to the system and added an appropriate amount of butanone for dilution, continued the reaction for 3 hours, and added 2.7g of 2,2-dimethicone Methylol propionic acid, control the temperature between 40-50°C, react for about 45 minutes, lower to an app...

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Abstract

The invention discloses a preparation method for an amphipathic organosilicon-polyurethane grafted copolymer with a comb-like structure. Waterborne polyurethane in a conventional product has poor dispersion stability and emulsifying effect. According to a technical scheme of the invention, the preparation method comprises the following steps: allowing polyisocyanate and trimethylolpropane polyethylene glycol monomethyl ether to react with polyol, adding modified polydimethylsiloxane with double hydroxy groups and obtained by hydrosilylation in advance, then adding a chain extender, adding water and carrying out emulsification, and carrying out reduced pressure distillation so as to obtain the amphipathic organosilicon-polyurethane grafted copolymer with the comb-like structure. The amphipathic organosilicon-polyurethane grafted copolymer with the comb-like structure and prepared by using the preparation method provided by the invention is applied to an oil-in-water positive-phase emulsion system or a water-in-oil reverse-phase emulsion system, and has good dispersion, stabilization and emulsification effects.

Description

technical field [0001] The invention relates to the technical field of polyurethane synthesis, in particular to a method for preparing an amphiphilic comb-shaped organic silicon-polyurethane graft copolymer. Background technique [0002] Due to its unique structure, silicone materials not only have excellent heat and oxidation resistance, cold resistance, low ultraviolet absorption, electrical insulation, weather resistance, corrosion resistance and other excellent properties, but also provide high elasticity, plasticity, biological Compatibility and other features. However, silicone materials have low surface energy, poor adhesion, and low compatibility with other organic materials, which greatly limit their applications in many fields. [0003] Water-based polyurethane is a type of material that has developed rapidly in recent years. On the basis of completely retaining the excellent adhesion, wear resistance, and adjustability of solvent-based polyurethane, it also has t...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/73C08G18/66C08G18/61C08G18/48C08G18/38C08G18/34C08G18/32
CPCC08G18/3206C08G18/3275C08G18/348C08G18/3857C08G18/4837C08G18/61C08G18/6674C08G18/6688C08G18/6692C08G18/73C08G18/755C08G18/758C08G18/7614C08G18/7671
Inventor周晖宋金星陈八斤乐翔余学康杨欣
Owner传化智联股份有限公司