Reactive colored waterborne polyurethane leather finishing agent resin and preparation method thereof

A technology of water-based polyurethane and leather finishing agent, which is applied in dyeing, textiles and papermaking, etc. It can solve the problems of low versatility, difficult wastewater treatment, poor thermal migration resistance, etc., and achieve natural feel, excellent mechanical properties and compatibility Good results

Inactive Publication Date: 2019-03-08
安徽清彩科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of reactive color water-based polyurethane leather finishing agent resin and its preparation method, synthesize copolymerization type cationic water-based polyurethane dye by the method of prepolymerization, then carry out capping protection to the active isocyanate group of resin end, make It can exist stably in aqueous emulsion at room temperature, which solves the problems of poor thermal migration resistance, low versatility, and difficult wastewater treatment in the process of using traditional low molecular dyes or pigments in leather finishing, textile printing or coating

Method used

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  • Reactive colored waterborne polyurethane leather finishing agent resin and preparation method thereof
  • Reactive colored waterborne polyurethane leather finishing agent resin and preparation method thereof
  • Reactive colored waterborne polyurethane leather finishing agent resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034]Dehydrate 50 grams of PPG (Mn=2000) at 110°C for 0.5-1.5 hours, then add 28 grams of IPDI, react at 90°C for 2 hours, add 0.7 grams of BDO, 0.89 grams of DYE4, and add 1 drop of dibutyltin dilaurate (DBTDL) and butanone 30ml, react at 70°C for 2 hours, then add dropwise a mixed solution of 8.9 grams of MDEA and 30mL of butanone at 50°C, drop it within 0.5-1 hour, and keep it at 65°C for 3 hours after the drop is completed , then add 0.8 g of PH and react at 85°C for 3 hours, then cool down to room temperature, add 4.5 g of acetic acid to react for 1-5 minutes, then add 208mL of water under high-speed shear, stir for 5-30 minutes, and put the reaction product at 45°C , 0.01MPa vacuum conditions to remove the butanone solvent, that is, to obtain a solid content of 30wt% water-based polyurethane dye.

Embodiment 2

[0036] Dehydrate 40 grams of PBA (Mn=2000) at 110°C for 0.5-1.5 hours, then add 20.2 grams of HDI, react at 90°C for 2 hours, add 2.06 grams of DEG, 0.8 grams of DYE5, add 2 drops of DBTDL and 30ml of butanone , reacted at 75°C for 2 hours, then added dropwise a mixed solution of 6.9 grams of MDEA and 40 mL of methyl ethyl ketone at 50°C, and dropped it within 0.5-1 hour. React at 50°C for 2 hours, then cool down to room temperature, add 3.5g of acetic acid to react for 1-5 minutes, then add 167mL of water under high-speed shear, stir for 5-30 minutes, and remove the reaction product at 45°C and 0.01MPa vacuum Solvent butanone is removed to obtain a water-based polyurethane dye with a solid content of 30 wt%.

Embodiment 3

[0038] Dehydrate 40 grams of PBA (Mn=2000) at 110°C for 0.5-1.5 hours, then add 20.2 grams of HDI, react at 90°C for 2 hours, add 2.06 grams of DEG, 0.55 grams of triethanolamine (NTA), 0.8 grams of DYE5, Add 2 drops of DBTDL and 30ml of butanone, react at 75°C for 2 hours, then add dropwise a mixed solution of 6.9g of MDEA and 40mL of butanone at 50°C, drop it within 0.5-1 hour, and keep it at 65°C for reaction 3 After 1 hour, add 1.7 grams of MEKO and react at 50 °C for 2 hours, then cool down to room temperature, add 3.5 grams of acetic acid for 1-5 minutes, add 167 mL of water under high-speed shear, and stir the reaction product for 5-30 minutes. ℃, 0.01MPa vacuum conditions to remove the butanone solvent, that is, to obtain a water-based polyurethane dye with a solid content of 30wt%.

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Abstract

The invention discloses reactive colored waterborne polyurethane leather finishing agent resin and a preparation method thereof, and relates to the technical field of waterborne polyurethane materials. The resin is prepared from, by weight, 30-70 parts of macromolecular dihydric alcohol, 15-50 parts of diisocyanate, 6-15 parts of hydrophilic chain-extending agents, 0.1-11 parts of dihydric alcoholchain-extending agents, 0.1-11 parts of reactive small molecule dyes, 0.01-0.08 part of dibutyltin dilaurate, 20-200 parts of butanone, 2-11 parts of end-capping agents, 4-11 parts of acetic acid and200-400 parts of water. Copolymerized cationic waterborne polyurethane dyes are synthesized by a prepolymerization method, an active isocyanate group at the tail end of the resin is protected by end-capping and can stably exist in aqueous emulsion under the condition of normal temperature, and the problems of poor heat transfer resistance, low universality and difficulty in wastewater treatment of a traditional low molecular dye or pigment in the use process of leather finishing, textile printing or coating are solved.

Description

technical field [0001] The invention belongs to the technical field of water-based polyurethane materials, in particular to a reactive colored water-based polyurethane leather finishing agent resin and a preparation method thereof. Background technique [0002] Water-based polyurethane (WPU for short) refers to the solution or emulsion formed by dissolving or dispersing polyurethane in water. It has the advantages of energy saving, non-combustibility, low odor, and little harm to the environment and human body. It has been widely used in leather finishing agents, textiles, etc. industries, coatings and adhesives etc. As a leather finishing agent, it has good film-forming properties, good adhesion, and the coating is cold-resistant, heat-resistant, wear-resistant, and resilient, and can endow the finished leather with excellent softness, plump and comfortable feel. As a color fixing agent for leather, water-based polyurethane has more unique advantages, such as: good low-tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/00D06P3/32C08G18/83C08G18/66C08G18/48C08G18/42C08G18/32
CPCD06P1/0052C08G18/664C08G18/6655C08G18/6674C08G18/6688C08G18/831C08G18/833D06P3/3266
Inventor 李军配曹苏毅吴祥松杨文东
Owner 安徽清彩科技有限公司
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