Preparation method and product of modified polyurethane flexible high-molecular emulsion containing side long chain alkyl

A polyurethane flexible and polymer emulsion technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as difficult to control, high molecular weight and high viscosity of fluorine-containing polyether polyols

Active Publication Date: 2015-07-15
HUBEI DAYA BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation method uses a small-molecule trifunctional chain extender to introduce cross-links into the polyurethane polymer, which makes it difficult to control the reaction process due to the rapid increase in system viscosity and high viscosity. The polyurethane polymer brought by the trifunctional chain extender The short-chain cross-linking is also not conducive to the enrichment of fluorine-containing water-repellent chain segments to the surface of the film
In additi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Example 1 Preparation method of modified polyurethane flexible polymer emulsion containing pendant long-chain alkyl groups of the present invention

[0080] The raw materials of the preparation method include:

[0081] 1. Polymerized monomer

[0082] Polyether triol: 0.25mol (750.0g) of polyglycerol with a molecular weight of 3000

[0083] Polyether glycol: a polyoxyethylene-terminated polypropylene glycol with a molecular weight of 2000 1.04 mol (2080.0 g)

[0084] Diisocyanate: Isophorone diisocyanate 10.00mol (2222.9g)

[0085] Chain extender: nonionic chain extender 1,4-butanediol 3.60mol (324.4g), anionic chain extender dimethylolpropionic acid 2.25mol (301.8g)

[0086] 2. Modifier

[0087] Hydrocarbyl-terminated polysiloxane linear body: Hydroxyl-terminated polydimethylsiloxane with a molecular weight of 2500 0.16mol (400.0g)

[0088] Polyolefin: Hydroxyl-terminated polybutadiene with a molecular weight of 2500 0.36 mol (900.0 g)

[0089] Functional chain extender: with a molecu...

Embodiment 2

[0138] Example 2 Preparation method of modified polyurethane flexible polymer emulsion containing pendant long-chain alkyl groups of the present invention

[0139] The raw materials of the preparation method include:

[0140] 1. Polymerized monomer

[0141] Polyether triol: ethylene oxide / propylene oxide block copolytriol with a molecular weight of 3500 0.22mol (770.0g)

[0142] Polyether glycol: 1.16mol (2320.0g) of polytetrahydrofurandiol with a molecular weight of 2000

[0143] Diisocyanate: toluene diisocyanate 10.00mol (2222.9g)

[0144] Chain extender: non-ionic chain extender neopentyl glycol 3.70mol (385.4g), anionic chain extender dimethylol butyric acid 2.40mol (355.6g)

[0145] 2. Modifier

[0146] Hydrocarbyl-terminated polysiloxane linear body: Hydroxyl-terminated polydimethylsiloxane with a molecular weight of 2200 0.20mol (440.0g)

[0147] Polyolefin: Hydroxyl-terminated polybutadiene with a molecular weight of 2700 0.30mol (810.0g)

[0148] Functional chain extender: 472.7 mo...

Embodiment 3

[0197] Example 3 Preparation method of modified polyurethane flexible polymer emulsion containing pendant long-chain alkyl groups of the present invention

[0198] The raw materials of the preparation method include:

[0199] 1. Polymerized monomer

[0200] Polyether triol: Polyglycerol with a molecular weight of 3500 0.27mol (945.0g)

[0201] Polyether glycol: 0.54mol (1080.0g) of polytetrahydrofurandiol with a molecular weight of 2000, 0.54mol (1080.0g) of ethylene oxide / propylene oxide block copolymer glycol with a molecular weight of 2000

[0202] Diisocyanate: toluene diisocyanate 10.00mol (1741.6g)

[0203] Chain extender: nonionic chain extender 1,6-hexanediol 3.45mol (407.7g), anionic chain extender dimethylol butyric acid 2.40mol (355.6g)

[0204] 2. Modifier

[0205] Hydrocarbyl terminated polysiloxane linear body: α,ω-diaminopropyl terminated polydimethylsiloxane with a molecular weight of 2000 0.30mol (600.0g)

[0206] Polyolefin: hydroxy-terminated polybutadiene with a molecula...

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Abstract

The invention relates to a preparation method and product of a modified polyurethane flexible high-molecular emulsion containing side long chain alkyl. The preparation method comprises the following steps: preparing raw materials including a polymeric monomer, a modifying agent, an auxiliary agent and water; performing dehydration pretreatment on polyether triol and polyether glycol; performing prepolymerization; performing chain extension; sealing ends; and emulsifying to prepare a modified polyurethane flexible high-molecular emulsion product containing side long chain alkyl. According to the modified polyurethane flexible high-molecular emulsion disclosed by the invention, polysiloxane chain links and polyolefin chain links are embedded into a skeleton structure of the modified polyurethane flexible high-molecular emulsion, and polyurethane high molecules are modified by using long chain alkyl. The obtained modified polyurethane flexible high-molecular emulsion containing side long chain alkyl has a certain density of long chain crosslinking and side long chain alkyl, has excellent stability, can be applied to dry coating processing of various substrate coatings and artificial leathers, and ensures that significant water-repellent and anti-fouling abilities, extremely excellent extension performance, excellent low-temperature high flexibility and anti-bending performance of product coating films can be achieved; and the product is safe and environment-friendly, and is convenient to use.

Description

Technical field [0001] The invention relates to a functional polyurethane coating agent emulsion suitable for various substrate coatings and dry coating processing of artificial leather, in particular to the preparation of a modified polyurethane flexible polymer emulsion containing side long-chain alkyl groups. Background technique [0002] At present, polyurethane polymer materials are often used in the coating of substrates and the dry finishing of artificial leather. In order to solve the problems of traditional polyurethane coating agents that are hard at low temperature, easy to fatigue, low extensibility and poor functionality, waterborne polyurethane coating agents modified with various functional monomers are becoming mainstream products in the field of coating processing. Functional water-based polyurethane finishing agents generally introduce various functional polymerized monomers, reactive functional molecules or functional groups into the polyurethane skeleton, ends...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/61C08G18/62C08G18/32C08G18/12C09D175/08
Inventor 权衡张梦月刘俊琦倪丽杰黎谦姜会钰潘名玉李祥肖咏梅田野
Owner HUBEI DAYA BIOLOGICAL TECH CO LTD
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