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Anion aromatic aqueous polyaminoester resin posterior chain extending method

A technology of waterborne polyurethane and process method, which is applied in the post-chain extension process field of cationic aromatic waterborne polyurethane resin, and can solve the problems of low crosslinking degree, poor comprehensive performance and high price

Inactive Publication Date: 2009-05-27
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, from the types of polyisocyanates selected, they are divided into two categories: aliphatic and aromatic. Aliphatic waterborne polyurethane resin has excellent comprehensive performance, especially aging resistance, but the price is high, and it is difficult to meet the needs of low- and middle-level consumer groups; aromatic The price of water-based polyurethane resin is much lower than that of aliphatic water-based polyurethane resin, but its comprehensive performance is relatively poor, especially for ionic aromatic water-based polyurethane resin, which accounts for the absolute largest domestic production volume, with low solid content, low cross-linking degree, strength, Elasticity, water resistance, solvent resistance, and chemical resistance are poor, and the amount of use is large, which limits the application range of aromatic water-based polyurethane resins, and also makes it difficult to improve the level and grade of water-based polyurethane resin products in my country, directly restricting domestic water-based polyurethane resins. The Competitiveness of Polyurethane Resin and Similar Foreign Products

Method used

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  • Anion aromatic aqueous polyaminoester resin posterior chain extending method
  • Anion aromatic aqueous polyaminoester resin posterior chain extending method
  • Anion aromatic aqueous polyaminoester resin posterior chain extending method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 782 grams of polyether type aromatic polyurethane ionomer (NCO% is 0.32%), structural formula such as formula (I), add in 3000ml plum blossom barrel, put under the high-speed disperser, add under 800 rpm, 5 ℃ of conditions Glacial acetic acid: 4.8g, react for 45 seconds, add water at 5°C: 270g, add tetraethylenepentamine: 3.2g after 60 seconds, stir at 5°C for 10 minutes to obtain a polyurethane emulsion, transfer to a precipitation kettle, 55°C , Acetone is removed under 0.8MPa to obtain an aromatic cationic water-based polyurethane resin with a structural formula such as formula (II). Product solid content: 60%; tensile strength: 6.3Mpa; peel strength (180°): 11.57N / cm; activation temperature: 60°C. Suitable as water-based plastic compound glue.

[0022]

Embodiment 2

[0024] Add 804 grams of polyether and polybutadiene type aromatic polyurethane ionomer (NCO% is 0.37%) in a 3000ml plum blossom bucket, put it under the high-speed disperser, add glacial acetic acid under the condition of 800 rpm and 5°C : 5.2 g, react for 45 seconds, add water at 5°C: 346 g, add isophorone diamine after 60 seconds: 10.6 g, stir at 5°C for 5 minutes to obtain polyurethane emulsion, transfer to the precipitation kettle, 55°C , Acetone is removed under 0.8MPa to obtain aromatic cationic water-based polyurethane resin. Solid content of the product: 40%; tensile strength: 3.24Mpa; hardness (Shore A) 48; film water resistance (25°C, 72 hours) unchanged; elongation at break (20°C): 280%. Suitable as fiberglass sizing agent.

Embodiment 3

[0026] Add 802 grams of polyether-type aromatic polyurethane ionomer (NCO% is 0.23%) in a 3000ml plum blossom barrel, put it under the high-speed disperser, add 2.8 grams of glacial acetic acid under the condition of 800 rpm and 5°C, and react After 40 seconds, add water: 330 grams at 5°C, add ethylenediamine: 1.8 grams after 60 seconds, and stir at 5°C for 5 minutes to obtain a polyurethane emulsion, transfer to a precipitation kettle, remove acetone at 55°C, 0.8MPa Aromatic cationic waterborne polyurethane resin was obtained. Product solid content: 48%; tensile strength: 0.8Mpa; hardness (Shore A) 62; film elongation: 1500%. Suitable as a water-based leather filling resin.

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Abstract

The invention relates to a positive ion aromatic aqueous polyaminoester resin posterior chain extending method which is characterized in that, on the basis of the line form or body form aromatic aqueous base polyurethane resin, dyadic or more amine is utilized for emulsion chain expansion. The solid content of the aqueous polyurethane resin obtained through the method according to the present invention is high, it also possesses good combination property and satisfactory environmental protection feature.

Description

technical field [0001] The invention relates to a post-chain extension process for aromatic water-based polyurethane resins used in coatings, leather and adhesives, in particular to a post-chain-extend process for cationic aromatic water-based polyurethane resins. Background technique [0002] Water-based polyurethane resin is widely used in construction, automobile, home decoration, furniture, packaging, printing, glass fiber, leather, daily necessities, handicrafts and many other aspects because of its good comprehensive performance and outstanding environmental protection. At present, from the types of polyisocyanates selected, they are divided into two categories: aliphatic and aromatic. Aliphatic waterborne polyurethane resin has excellent comprehensive performance, especially aging resistance, but the price is high, and it is difficult to meet the needs of low- and middle-level consumer groups; aromatic The price of water-based polyurethane resin is much lower than that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/83
Inventor 许戈文熊潜生戴家兵王彤
Owner ANHUI UNIVERSITY