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Single-component polyurethane foaming adhesive as well as preparation method and application thereof

A polyurethane and adhesive technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of reducing the viscosity of the system, the use of waterproof performance, and the inability to meet the foaming ratio of foamed ceramic tiles, etc. Achieve the effect of adjustable foaming ratio, lower production cost, and adjustable mechanical properties

Pending Publication Date: 2022-02-15
广东省科学院生物与医学工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, some one-component polyurethane adhesives also choose to add organic solvents. On the one hand, it can reduce the viscosity of the system. On the other hand, it can also be used as a foaming agent to help adjust the curing density, but there is a problem of VOC emissions.
As soon as there are reports of single-component polyurethane foaming adhesives, most polyurethane adhesives cannot meet the requirements of foamed ceramic tiles on the foaming ratio, curing time, and waterproof performance of the adhesive. It is urgent to propose a polyurethane adhesive to solve these problems.

Method used

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  • Single-component polyurethane foaming adhesive as well as preparation method and application thereof
  • Single-component polyurethane foaming adhesive as well as preparation method and application thereof
  • Single-component polyurethane foaming adhesive as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a single-component polyurethane foam adhesive for foamed ceramic tiles, the composition of the raw material formula is as follows:

[0031]

[0032]

[0033] According to the above ratio, mix castor oil polyol, propylene glycol polyether and poly-1,4-butylene adipate diol into a three-necked flask with a stirrer equipped with a thermometer, heat up to 110°C and vacuumize Dry for 2 hours to remove a small amount of water in the system to obtain a mixed polyol. Then the dehydrated mixed polyol and IPDI are fed according to the formula, the temperature is raised to 50°C, the stirring speed is increased and nitrogen gas is blown to start the reaction. Sampling and measuring the content of isocyanate groups in the polymer every 10 minutes, when the content of isocyanate reaches 7%-8%, cool down to 40°C, add dibutyltin dilaurate and triethanolamine (dibutyltin dilaurate The mass ratio of triethanolamine and triethanolamine is 1:2), after continu...

Embodiment 2

[0036] A preparation method of a single-component polyurethane foam adhesive for foamed ceramic tiles, the composition of the raw material formula is as follows:

[0037]

[0038]

[0039] According to the above ratio, mix castor oil polyol, polytetrahydrofuran diol and poly-1,4-butylene adipate diol into a three-necked flask with a stirrer equipped with a thermometer, heat up to 110°C and vacuumize Dry for 2 hours to remove a small amount of water in the system to obtain a mixed polyol. Then the dehydrated mixed polyol and IPDI are fed according to the formula, the temperature is raised to 50°C, the stirring speed is increased and nitrogen gas is blown to start the reaction. Sampling and measuring the content of isocyanate groups in the polymer every 10 minutes, when the content of isocyanate reaches 10%-11%, cool down to 40°C, add dibutyltin dilaurate and dimethylethanolamine (dilauric acid The mass ratio of dibutyltin and triethanolamine is 1:1.5), after continuing t...

Embodiment 3

[0042] A preparation method of a single-component polyurethane foam adhesive for foamed ceramic tiles, the composition of the raw material formula is as follows:

[0043]

[0044]

[0045] According to the above ratio, mix castor oil polyol, polytetrahydrofuran diol and poly-1,4-butylene adipate diol into a three-necked flask with a stirrer equipped with a thermometer, heat up to 110°C and vacuumize Dry for 2 hours to remove a small amount of water in the system to obtain a mixed polyol. Then the dehydrated mixed polyol and IPDI are fed according to the formula, the temperature is raised to 50°C, the stirring speed is increased and nitrogen gas is blown to start the reaction. Sampling and measuring the content of isocyanate groups in the polymer every 10 minutes, when the content of isocyanate reaches 8%-9%, cool down to 40°C, add dibutyltin dilaurate and dimethylethanolamine (dilauric acid The mass ratio of dibutyltin and triethanolamine is 1:1.5), after continuing to ...

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Abstract

The invention discloses a single-component polyurethane foaming adhesive as well as a preparation method and application thereof. The single-component polyurethane foaming adhesive is prepared from the following components in parts by mass: 31.1 to 55.3 parts of vegetable oil polyol, 15.0 to 53.4 parts of polyether polyol, 30 to 106 parts of polyester polyol, 100 parts of isocyanate and 0.176 to 1.570 parts of a catalyst. The single-component polyurethane foaming adhesive provided by the invention does not contain an organic solvent, has a good micro-bubble structure and cohesiveness after being cured, is simple in preparation process, adjustable in curing rate and foaming times, simple and convenient to use, and suitable for bonding of foaming ceramic tile gap base plane materials.

Description

technical field [0001] The invention belongs to the technical field of composite adhesives, and relates to a single-component polyurethane foam adhesive and its preparation method and application. Background technique [0002] Compared with traditional wall building materials, foamed ceramics have the advantages of fast construction, dry construction, no waterproof treatment, and labor saving. However, because the product is porcelain, it is completely vitrified, and the shrinkage deformation rate is very small, which is very important in construction. Strict, especially the bonding of wall panels. The traditional ceramic tile paving is to prepare cement and sand to make mortar and apply it on the back of the brick. The construction process requires high technology and is difficult to construct. The cement mortar forms a hard connection. The thermal expansion and contraction caused by climate change will easily cause the wall tile The paste is not firm, hollow, seepage, or ...

Claims

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Application Information

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IPC IPC(8): C09J175/14C08G18/75C08G18/66C08G18/48C08G18/42C08G18/36
CPCC09J175/14C08G18/755C08G18/36C08G18/4238C08G18/4825C08G18/4854C08G18/6696
Inventor 王青谢东李发勇刘海露李辰
Owner 广东省科学院生物与医学工程研究所
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