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Low-cost and high-strength polyurethane adhesive as well as preparation method and application thereof

A polyurethane adhesive, high-strength technology, used in polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve the problem of high cost of pure polyurethane adhesive, low adhesive strength, and large viscosity bubbles. problems, to achieve the effect of simple and controllable preparation process, short curing time and low cost

Pending Publication Date: 2022-03-08
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure polyurethane adhesives often have a high viscosity, which leads to a large number of bubbles after curing, which makes the strength of the cured adhesive low, and the cost of pure polyurethane adhesives is relatively high, so it encounters great difficulties in the wide application of separation membrane casting.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1. Preparation of component A: 80g of water glass (modulus 2.8), 10g of chlorinated paraffin, 10g of propylene carbonate and 0.1g of potassium acetate were mixed evenly according to the proportion, and after standing for defoaming, component A was obtained .

[0037] Step 2. Preparation of component B: Stir 80 g of polyisocyanate PAPI, 20 g of dibutyl phthalate and 5 g of fatty acid glyceride to obtain component B.

[0038] Step 3: Mix component A and component B at a mass ratio of 1:1.

[0039] Step 4: Pouring the obtained polyurethane adhesive on the hollow fiber membrane.

Embodiment 2

[0041] Step 1. Preparation of component A: 70g of water glass (modulus 2.5), 20g of chlorinated paraffin, 10g of propylene carbonate and 0.1g of potassium ethoxide were mixed evenly in proportion, and component A was obtained after standing for defoaming.

[0042] Step 2, preparation of component B: Stir 80 g of polyisocyanate PAPI, 20 g of dibutyl phthalate and 5 g of sorbitan fatty acid to obtain component B.

[0043] Step 3: Mix component A and component B at a mass ratio of 1:1.2.

[0044] Step 4: Pouring the obtained polyurethane adhesive on the hollow fiber membrane.

Embodiment 3

[0046] Step 1. Preparation of component A: 60g of water glass (modulus 2.8), 20g of chlorinated paraffin, 20g of propylene carbonate and 0.1g of potassium acetate were mixed evenly according to the proportion, and component A was obtained after standing for defoaming.

[0047] Step 2, preparation of component B: Stir 80 g of polyisocyanate PAPI, 20 g of dibutyl phthalate and 5 g of sorbitan fatty acid to obtain component B.

[0048] Step 3: Mix component A and component B at a mass ratio of 1:1.5.

[0049] Step 4: Pouring the obtained polyurethane adhesive on the hollow fiber membrane.

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Abstract

The invention belongs to the technical field of polyurethane adhesives, and particularly relates to a low-cost and high-strength polyurethane adhesive as well as a preparation method and application thereof. The adhesive is prepared from a component A and a component B, and the mass ratio of the component A to the component B is 1: 1-1: 5; the component A is prepared from the following components in parts by weight: 60 to 100 parts of water glass, 0 to 20 parts of chlorinated paraffin, 0 to 30 parts of propylene carbonate and 0.1 to 1.0 part of metal salt catalyst; the component B is prepared from the following components in parts by weight: 30 to 80 parts of polyisocyanate, 10 to 30 parts of dibutyl phthalate and 0.1 to 5 parts of surfactant; the polyurethane adhesive is obtained by mixing the component A and the component B in proportion. The polyurethane adhesive disclosed by the invention is low in viscosity, low in cost, short in curing time, high in strength after curing and excellent in comprehensive performance; the preparation process is simple and controllable, raw materials are easily available, and conditions are mild; the device is used for carrying out pouring and end sealing treatment on a film.

Description

technical field [0001] The invention belongs to the technical field of polyurethane adhesives, and in particular relates to a low-cost, high-strength polyurethane adhesive and its preparation method and application. Background technique [0002] Membrane technology is a high-tech technology used to solve the shortage of water resources and control water pollution. It has been widely used in seawater desalination, drinking water purification, domestic sewage and industrial wastewater treatment and other fields. Separation membrane is the core of the field of membrane separation, which can be filtered by internal pressure or external pressure. Separation membranes need to be used in related projects in the form of membrane modules, and a large amount of adhesive is required to seal them when they are made into membrane modules. The characteristics of the adhesive itself, the interaction between the adhesive and the separation membrane, and the shell of the membrane module wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/04
CPCC09J175/04C09J11/04C08K3/36
Inventor 李健李金伟王树庆李海东
Owner SHANDONG INOV NEW MATERIALS CO LTD
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