Preparation method of bi-component polyurethane pouring sealant for water treatment membrane

A two-component polyurethane, water treatment membrane technology, used in polyurea/polyurethane adhesives, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problem of insufficient bonding strength, increased production costs, and poor aging resistance. and other problems, to achieve the effect of fast curing speed, improved production efficiency and excellent aging resistance

Active Publication Date: 2017-08-22
南京威邦新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of slow curing speed, insufficient bonding strength and poor aging resistance of the current polyurethane potting adhesive, it cannot be used alone in the field of water treatment, and adding other potting adhesives for secondary pouring increases production costs. Therefore, this The invention provides a method for preparing a two-component polyurethane potting adhesive for water treatment membranes

Method used

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  • Preparation method of bi-component polyurethane pouring sealant for water treatment membrane
  • Preparation method of bi-component polyurethane pouring sealant for water treatment membrane
  • Preparation method of bi-component polyurethane pouring sealant for water treatment membrane

Examples

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Embodiment 1

[0048] This embodiment 1 provides a method for preparing a two-component polyurethane potting adhesive for water treatment membranes. The prepared two-component polyurethane potting adhesive has fast curing speed, high tensile and shear strength, excellent bonding performance, and Excellent aging performance and other characteristics. Used for potting and bonding of hollow fiber membranes. The preparation method specifically includes:

[0049] Prepare component A:

[0050] Get raw materials according to the following ratio:

[0051] In terms of parts by mass, 21 parts by mass of bisphenol A-modified polyoxypropylene trihydric alcohol with a weight average molecular weight of 800 and 65 parts by mass of primary castor oil polyol were added to the synthesis kettle, and the temperature was raised to 110-120°C vacuum dehydration for 2-3 hours while stirring, and the moisture index is controlled below 200ppm; cool down to room temperature and add 10 parts by mass of diethylene gly...

Embodiment 2

[0057] This embodiment 2 provides a preparation method of a two-component polyurethane potting adhesive for water treatment membranes. The prepared two-component polyurethane potting adhesive has a fast curing speed, high tensile and shear strength, excellent bonding performance, and Excellent aging performance and other characteristics. Used for potting and bonding of hollow fiber membranes. The preparation method specifically includes:

[0058] Prepare component A:

[0059] Get raw materials according to the following ratio:

[0060] In terms of parts by mass, 35 parts by mass of bisphenol A modified polyoxypropylene trihydric alcohol with a weight average molecular weight of 600 and 55 parts by mass of primary castor oil polyol are added to the synthesis kettle, and the temperature is raised to 110-120°C vacuum dehydration for 2-3 hours while stirring, and the moisture index is controlled below 200ppm; cool down to room temperature and add 6 parts by mass of diethylene g...

Embodiment 3

[0066] This embodiment three provides a preparation method of a two-component polyurethane potting adhesive for water treatment membranes. The prepared two-component polyurethane potting adhesive has fast curing speed, high tensile and shear strength, excellent bonding performance, and Excellent aging performance and other characteristics. Used for potting and bonding of hollow fiber membranes. The preparation method specifically includes:

[0067] Prepare component A:

[0068] Get raw materials according to the following ratio:

[0069] In terms of parts by mass, 26 parts by mass of bisphenol A modified polyoxypropylene diol with a weight average molecular weight of 1000 and 60 parts by mass of primary castor oil polyol are added to the synthesis kettle, and the temperature is raised to 110-120°C vacuum dehydration for 2-3 hours while stirring, and the moisture index is controlled below 200ppm; cool down to room temperature and add 8 parts by mass of dipropylene glycol, 4 ...

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Abstract

The invention discloses a preparation method of a bi-component polyurethane pouring sealant for a water treatment membrane. The pouring sealant comprises a component A and a component B; when the pouring sealant is stored, the component A and the component B are stored separately; when the pouring sealant is used, the component A and the component B are compounded; after the component A and the component B are mixed according to a mass ratio of (1.0 to 1.2):(0.8 to 1.0), the bi-component polyurethane pouring sealant for the water treatment membrane is obtained. According to the method, the obtained bi-component polyurethane pouring sealant for the water treatment membrane has a quicker curing speed, a bonding effect is achieved within 30 minutes in case of normal temperature bonding, the defect of slow curing of a common polyurethane pouring sealant can be overcome, complete curing can be realized within 24 hours, and the production efficiency is improved; meanwhile, a bi-component product is stronger in bonding force, higher in shear strength and excellent in ageing resistance, and has a good bonding effect on a hollow fiber membrane, and the service life of a membrane assembly can be longer.

Description

technical field [0001] The invention relates to a preparation method of a two-component polyurethane potting glue for water treatment membranes, which is especially suitable for the potting and bonding of hollow fiber membranes. Background technique [0002] Hollow fiber membrane is a kind of porous filter material, which is mostly used in the field of drinking water and sewage treatment. Its principle is to screen out large particles through mechanical sieving, and water molecules can pass through. Compared with other forms of membranes, hollow fiber membranes have the following outstanding advantages: 1) The filling density of membrane filaments is high, and the working area of ​​membrane modules is large; 2) The membrane material is self-supporting, no other support is required, and the preparation process is simple; 3) The cost of the membrane material per unit of water production is low, and the value of application and promotion is great. [0003] The hollow fiber mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/14C09J11/04C09J11/06C08G18/67C08G18/66C08G18/48C08G18/32C08G18/10C08G18/22C08G18/20B01D63/02
CPCB01D63/023C08G18/10C08G18/2018C08G18/225C08G18/227C08K3/36C08K5/5435C09J11/04C09J11/06C09J175/08C09J175/14C08G18/6696C08G18/6674
Inventor 陈小峰蔡祥马西兰
Owner 南京威邦新材料有限公司
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