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A kind of polyurethane-acrylic water repellent prepared by utilizing side chain double bonds

A technology of acrylate and water-repellent agents, which is applied in the field of polyurethane-acrylate water-repellent agents, can solve the problems of poor washing fastness of water-repellent agents, and achieve improved compatibility, avoiding activity reduction, and stable performance Effect

Active Publication Date: 2021-04-30
高青如意纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem of poor washing fastness of traditional water-repellent agents, the present invention uses oxime organic compounds to block the exposed isocyanate groups at the end of polyurethane prepolymer, and deblocking reaction occurs at a certain temperature

Method used

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  • A kind of polyurethane-acrylic water repellent prepared by utilizing side chain double bonds
  • A kind of polyurethane-acrylic water repellent prepared by utilizing side chain double bonds
  • A kind of polyurethane-acrylic water repellent prepared by utilizing side chain double bonds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Investigate the effect of different molar ratios of isocyanate and hydroxyl on water repellent:

[0052] Prepare a kind of polyurethane-acrylic acid ester water-repellent agent and finish fabric according to the following steps:

[0053] Preparation of polyurethane-acrylate water repellent:

[0054] Preparation of water-based polyurethane self-emulsion with carbon-carbon double bond in side chain:

[0055] (1) Polytetrahydrofuran (Mn=850, accounting for 95% of the total mass of hydroxyl groups), 2,2-dimethylol butyric acid (4% of the total mass of hydroxyl groups), 1,5-hexadiene-3,4 - After diol (accounting for 1% of the total mass of hydroxyl groups) was vacuum-dried at 70° C. to remove water for 3-4 hours. In the presence of nitrogen protection and catalyst dibutyltin dilaurate (accounting for 0.08% of the total monomer mass participating in the reaction), isophorone diisocyanate was slowly added dropwise to the mixture containing polytetrahydrofuran and 30% 2,2-dim...

Embodiment 2

[0070] Investigate the influence of the reaction conditions of acrylate and waterborne polyurethane self-emulsion on the water repellent agent:

[0071] Preparation of polyurethane self-emulsion: select the molar ratio of isocyanate and hydroxyl to be 1.3, and refer to Example 1 for other conditions to prepare polyurethane self-emulsion

[0072] Preparation of water repellent by self-emulsion reaction of acrylate and side chain carbon-carbon double bond-containing waterborne polyurethane:

[0073] Take the above-mentioned water-based polyurethane emulsion containing carbon-carbon double bonds in the side chain and heat it up to 50°C. :2:0, 0:2:1, 0:1:2 (the mass ratio of acrylate monomer to side chain carbon-carbon double bond polyurethane self-emulsion is 1:1) and added dropwise to the polyurethane emulsion Inside, stir for 15min under the high-speed mixer (r=4000r / min), then let it stand for 1h and raise the temperature to 75°C, slowly add potassium persulfate initiator (ac...

Embodiment 3

[0083] Prepare a kind of polyurethane-acrylic acid ester water-repellent agent and finish fabric according to the following steps:

[0084] Preparation of polyurethane-acrylate water repellent:

[0085] Preparation of water-based polyurethane self-emulsion with carbon-carbon double bond in side chain:

[0086] (1) Polypropylene glycol (Mn=2000, accounting for 79% of the total mass of hydroxyl groups), 2,2-dimethylol propionic acid (accounting for 11% of the total mass of hydroxyl groups), 7-octene-1,2-diol (accounting for 10% of the total mass of hydroxyl groups) after vacuum drying at 70° C. to remove water for 3-4 hours. In the presence of nitrogen protection and catalyst dibutyltin dilaurate (accounting for 0.08% of the total monomer mass participating in the reaction), p-phenylene diisocyanate was slowly added dropwise to the mixture containing polypropylene glycol and 30% 2,2-dimethylol propane. acid (the molar ratio of isocyanate to hydroxyl is 1.3), the reaction tempe...

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Abstract

The invention discloses a polyurethane-acrylate water-repellent agent prepared by utilizing side chain double bonds, and belongs to the technical field of environment-friendly polymers. The present invention utilizes a carbon-carbon double bond-containing dihydroxy small molecule chain extender with a carbon chain structure to introduce a carbon-carbon double bond into the side chain of the polyurethane to adjust the number of double bonds on the water-based polyurethane segment that participate in free radical polymerization with the acrylate monomer , resulting in a branched structure, improving the compatibility of polyurethane and acrylate; combining with the fabric through the oxime end-capping structure, increasing the fabric fastness. The polyurethane-acrylic water repellent prepared by the invention is non-toxic and low in VOC, and the physical and chemical properties of the fabric after finishing are obviously improved, and have good application prospects.

Description

technical field [0001] The invention relates to a polyurethane-acrylate water-repellent agent prepared by using side chain double bonds, and belongs to the technical field of environment-friendly polymers. Background technique [0002] With the development and progress of society, in the application of textiles, people have higher and higher requirements for the wearing performance of textiles, not only limited to wearing comfort, but also have functions such as water repellency, UV protection, and flame retardancy. Therefore, functional textiles Research and development are getting more and more attention. Water-repellent and hydrophobic textiles are a kind of functional textiles, which have waterproof, oil-proof, anti-fouling and self-cleaning functions. The surface of the fabric after water-repellent finishing cannot be wetted by water, but still maintains the moisture-permeable and breathable properties of the fabric. , to meet the consumption requirements. Fluorine el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/14C08F220/18C08F220/14D06M15/263
CPCC08F290/147D06M15/263D06M2200/12C08F220/14C08G18/0814C08G18/0823C08G18/10C08G18/246C08G18/3228C08G18/3275C08G18/348C08G18/4238C08G18/4277C08G18/4825C08G18/4833C08G18/4854C08G18/6659C08G18/6692C08G18/6715C08G18/673C08G18/675C08G18/755C08G18/7614C08G18/7671C09D5/00C09D151/08D06M15/564C08G18/286C08F220/1811C08F220/1804C08F220/1818C08F293/005C09D5/02C09D153/00
Inventor 杜金梅王少飞许长海周嫦娥姚安康周攀飞孙昌
Owner 高青如意纺织有限公司