Environment-friendly self-extinction waterborne polyurethane and preparation method and application thereof

A water-based polyurethane, self-extinguishing technology, applied in polyurea/polyurethane coatings, applications, animal husbandry, etc., can solve the problems of poor basic performance of coatings, cumbersome and time-consuming synthesis steps, difficult industrial production, etc. Simple and convenient production process, natural surface effect

Inactive Publication Date: 2020-04-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent publication number is CN103626930A "A preparation method of water-based acrylic polyurethane matting resin with phase separation structure". At the beginning, two types of polyurethanes need to be prepared, and then the acrylate mixture is subjected to seed emulsion polymerization in these two polyurethanes. The whole synthesis steps are cumbersome and time-consuming, consume a large amount of organic solvents, and it is difficult to carry out industrial production
The patent publication number is CN105506997A "A Matting Type Waterborne Polyurethane Leather Finishing Agent and Its Preparation Method". This is by introducing organic silicon monomers into the system, but due to the lack of cross-linking degree, other basic properties of the coating are not good.
However, there are not many water-based polyurethanes that can be applied to leather products and maintain their hand feel.

Method used

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  • Environment-friendly self-extinction waterborne polyurethane and preparation method and application thereof
  • Environment-friendly self-extinction waterborne polyurethane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045](1) Add 16.667g of polytetrahydrofuran ether glycol 1000 (PTMG1000), 0.226g of silok 8861 and 0.452g of trimethylolpropane (TMP) into the reactor respectively, and remove water under vacuum at 120°C for 2 hours , Dissolved in 7g of acetone. Lower the temperature to 60°C, add 10.545g of isophorone diisocyanate (IPDI), stir evenly, raise the temperature to 85°C, then add the catalyst dibutyltin dilaurate (DBTDL) (based on the mass of prepolymer 0.16 wt%), the reactant was reacted at 85°C for 3h to obtain 34.89g of prepolymer.

[0046] (2) Add 0.813 g of 2,2-dimethylolpropionic acid (DMPA) to the above prepolymer, and continue to react at 85° C. for 2 hours. Then start to lower the temperature, cool the prepolymer to 40°C and neutralize the reaction with 0.614g of triethylamine (TEA) (the molar ratio of DMPA is 1:1) for 30 minutes.

[0047] (3) Disperse the obtained prepolymer in deionized water containing 0.151g of 2-[(2-aminoethyl)amino]ethanesulfonic acid sodium salt (...

Embodiment 2

[0051] (1) Add 25g of polypropylene glycol 1000 (PPG1000), 0.225g of silok 8861 and 0.675g of trimethylolpropane (TMP) into the reaction kettle, remove water under vacuum at 120°C for 2 hours, dissolve in 10g of acetone. Lower the temperature to 60°C, add 15.771g of isophorone diisocyanate (IPDI), stir evenly, raise the temperature to 85°C, then add the catalyst dibutyltin dilaurate (DBTDL) (based on the mass of prepolymer 0.16 wt%), the reactant was reacted at 85°C for 3h to obtain 51.671g of prepolymer.

[0052] (2) Add 1.215 g of 2,2-dimethylolbutyric acid (DMBA) to the above prepolymer, and continue to react at 85° C. for 2 hours. Then start to lower the temperature, cool the prepolymer to 40°C and neutralize the reaction with 0.918g of tripropylamine (the molar ratio to DMBA is 1:1) for 30 minutes.

[0053] (3) Disperse the obtained prepolymer in deionized water containing 0.225 g of 2-[(2-aminoethyl)amino]propanesulfonic acid sodium salt at room temperature with a stir...

Embodiment 3

[0056] (1) Add 33.333g of polycaprolactone diol 1000 (PCL1000), 0.611g of silok 8861 and 0.907g of trimethylolpropane (TMP) into the reactor respectively, and remove water under vacuum at 120°C for 2 Hours, dissolved in 13g of acetone. Lower the temperature to 60°C, add 21.144g of isophorone diisocyanate (IPDI), stir evenly, raise the temperature to 85°C, then add the catalyst dibutyltin dilaurate (DBTDL) (based on the mass of prepolymer 0.16 wt%), the reactant was reacted at 85°C for 3h, and 68.995g of prepolymer was obtained.

[0057] (2) 1.633 g of 2,2-dimethylolbutyric acid (DMBA) was added to the above prepolymer, and the reaction was continued at 85° C. for 2 hours. Then start to lower the temperature, cool the prepolymer to 40°C and neutralize the reaction with 1.233g of triethylamine (TEA) (the molar ratio of DMBA is 1:1) for 30 minutes.

[0058] (3) Disperse the obtained prepolymer in deionized water containing 0.303g of 2-[(2-aminoethyl)amino]ethanesulfonic acid so...

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Abstract

The invention discloses environment-friendly self-extinction waterborne polyurethane and a preparation method and application thereof. The preparation method comprises the following steps: first, preparing a polyurethane prepolymer, namely, respectively adding water-removed oligomer polymerized dihydric alcohol, a small-molecular trihydric alcohol compound and terminal hydroxyl-terminated organicsilicone oil into a reaction container, adding aliphatic diisocyanate and a catalyst, and performing reaction to obtain the prepolymer; adding a carboxylic acid type hydrophilic chain extender, and adding a neutralizer for neutralization reaction; and carrying out primary emulsification chain extension on an amine sulfonate hydrophilic chain extender and deionized water, adding a small-molecular chain extender containing active hydrogen, and carrying out secondary post-chain extension. The environment-friendly self-extinction waterborne polyurethane resin is large in particle size and wide indistribution, has micro-nano roughness, does not need to be added with any delustering agent, shrinks after a coating film is dried and dewatered, and is low in leather surface gloss, good in hand feeling, natural in surface, simple in preparation technological process and convenient to use.

Description

technical field [0001] The invention belongs to the field of water-based environment-friendly polyurethane coatings, in particular to an environment-friendly self-extinction water-based polyurethane and its preparation method and application. Background technique [0002] Due to the continuous development of material life, people's aesthetic concepts have also changed. The original high-gloss leather surface has been transformed into a matte surface, making leather products with a natural leather feel very popular. There are mainly two ways to produce matting on the leather surface: physical matting and chemical matting. Physical matting is mainly achieved by introducing additives (i.e. matting agents such as silica), which tend to disperse imperfectly due to incompatibility between additives and polyurethane dispersions, increasing light scattering and reducing Reflection, which results in uneven gloss on the surface of the substrate. [0003] Although the purpose of exti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/65C08G18/61C08G18/48C08G18/42C08G18/32C08G18/12C09D175/08C09D175/06C14C11/00
CPCC08G18/12C08G18/3206C08G18/4009C08G18/4277C08G18/4825C08G18/4854C08G18/61C08G18/6517C08G18/6644C08G18/6677C08G18/755C09D175/06C09D175/08C14C11/003C08G18/348C08G18/3228C08G18/3857
Inventor 胡剑青张志敏周曦涂伟萍王峰
Owner SOUTH CHINA UNIV OF TECH
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