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Quick dry type polyurethane sealant and preparation method thereof

A polyurethane sealant, quick-drying technology, applied in polyurea/polyurethane adhesives, chemical instruments and methods, adhesives, etc., can solve unfavorable post-maintenance of high-speed railways, curing speed is difficult to meet the needs of rapid maintenance, fast Poor dryness and other problems, to achieve the effect of excellent comprehensive mechanical properties, high strength, low temperature softness

Inactive Publication Date: 2016-04-20
安徽万诚达新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current polyurethane sealant has poor quick-drying property, the surface-drying time is usually about 3 hours, and the curing speed is 3-6mm / 24h
This curing speed is difficult to meet the needs of high-speed railways for rapid maintenance, which is not conducive to the later maintenance of high-speed railways

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A quick-drying type polyurethane sealant, comprising main ingredient A and curing agent B, wherein,

[0034] The main ingredient A is composed of the following raw materials in parts by weight: 29 parts of difunctional polyether polyol, 3.2 parts of trifunctional polyether polyol, 27 parts of dioctyl phthalate, 0.6 part of dibutyltin dilaurate , 31 parts of calcium carbonate, 7 parts of hydrophobically modified fumed silica, 0.2 part of antioxidant, 0.2 part of ultraviolet absorber, 1.8 parts of iron oxide black;

[0035] The curing agent B is composed of the following raw materials in parts by weight: 29.6 parts of diphenylmethane diisocyanate, 55 parts of polyoxypropylene glycol, 15 parts of trifunctional polyether polyol, and 0.4 part of dibutyltin dilaurate.

[0036] When using, the main ingredient A and curing agent B are mixed evenly in a weight ratio of 3:1.

[0037] The preparation method of the quick-drying type polyurethane sealant of the present embodiment i...

Embodiment 2

[0049] A kind of quick-drying type polyurethane sealant, comprises main material and curing agent, wherein,

[0050] The main ingredient A is composed of the following raw materials in parts by weight: 27 parts of difunctional polyether polyol, 1.8 parts of trifunctional polyether polyol, 26 parts of dioctyl phthalate, 0.9 part of dibutyltin dilaurate , 37 parts of calcium carbonate, 6 parts of hydrophobically modified fumed silica, 0.4 part of antioxidant, 0.4 part of ultraviolet absorber, 1.2 parts of iron oxide black;

[0051] The curing agent B is composed of the following raw materials in parts by weight: 32 parts of diphenylmethane diisocyanate, 68 parts of polyoxypropylene diol, 21 parts of trifunctional polyether polyol, and 0.15 part of dibutyltin dilaurate.

[0052] The preparation method of the quick-drying polyurethane sealant of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0054] A kind of quick-drying type polyurethane sealant, comprises main material and curing agent, wherein,

[0055] The main ingredient A is composed of the following raw materials in parts by weight: 33 parts of difunctional polyether polyol, 2.5 parts of trifunctional polyether polyol, 33 parts of dioctyl phthalate, 0.85 part of dibutyltin dilaurate , 38 parts of calcium carbonate, 9.5 parts of hydrophobically modified fumed silica, 0.35 part of antioxidant, 0.45 part of ultraviolet absorber, 1.1 part of iron oxide black;

[0056] The curing agent B is composed of the following raw materials in parts by weight: 33 parts of diphenylmethane diisocyanate, 72 parts of polyoxypropylene glycol, 23 parts of trifunctional polyether polyol, and 0.25 part of dibutyltin dilaurate.

[0057] The preparation method of the quick-drying polyurethane sealant of this embodiment is the same as that of Embodiment 1.

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PUM

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Abstract

The invention discloses quick dry type polyurethane sealant which comprises a main material A and a curing agent B. The main material A is prepared from, by weight, 25-35 parts of two-functionality-degree polyether polyol, 0-5 parts of three-functionality-degree polyether polyol, 25-35 parts of dioctyl phthalate, 0.5-1 part of dibutyltin dilaurate, 30-40 parts of calcium carbonate, 5-10 parts of hydrophobic modified gas-phase silicon dioxide, 0-0.5 part of antioxidant, 0-0.5 part of ultraviolet light absorber and 1-2 parts of black iron oxide. The curing agent B is prepared from, by weight, 25-35 parts of diphenyl-methane-diisocyanate, 55-75 parts of polypropylene oxide glycol, 15-25 parts of three-functionality-degree polyether polyol and 0-0.5 part of dibutyltin dilaurate. In the use process, the main material A and the curing agent B are evenly mixed for use according to the weight ratio of 3 to 1. The polyurethane sealant can be rapidly dried, has high tensile strength and breaking extensibility and is excellent in comprehensive mechanical performance and suitable for occasions where rapid curing is needed.

Description

technical field [0001] The invention relates to the technical field of polyurethane waterproof materials, in particular to a quick-drying polyurethane sealant and a preparation method thereof. Background technique [0002] Polyurethane sealant is a sealant mainly composed of polyurethane rubber and polyurethane prepolymer. Polyurethane sealants are widely used in buildings, squares, and roads as caulking sealing materials, as well as sealing in automobile manufacturing, glass installation, electronic filling, submarines and rockets, etc. The main function of polyurethane sealant is to prevent rainwater from penetrating into the interior through the joints of concrete components, and to avoid frost heave damage to concrete components caused by moisture under cold conditions. [0003] When polyurethane sealant is used as high-speed railway caulking sealing material, since the high-speed railway is put into normal operation, the time available for maintenance and repair constr...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/06C09J11/04C08G18/48C09K3/10
CPCC09J175/08C08G18/4812C08K3/26C08K3/36C08K5/12C08K13/06C08K2003/265C09J11/04C09J11/06C09K3/10C09K3/1021
Inventor 王姣吕万青王建
Owner 安徽万诚达新型材料有限公司
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