PU (polyurethane) daub and preparation method thereof

A technology of polyurethane and mastic, which is applied in the field of mastic materials, can solve problems such as high brittleness, mastic that cannot meet the needs of the marine anti-corrosion field, and easy cracks in the mastic layer, so as to achieve good water resistance, improve technical application level, and superior performance.

Active Publication Date: 2015-11-18
BEIJING HAIYUEXING SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

③ High brittleness, when the matrix is ​​deformed, the cement layer is prone to cracks
[0011] However, the existing cement still cannot meet the needs of the marine anticorrosion field

Method used

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  • PU (polyurethane) daub and preparation method thereof
  • PU (polyurethane) daub and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A component:

[0056] Take component A, in parts by weight, 120 parts of PTMEG200, 80 parts of MDI, 50 parts of red phosphorus flame retardant, among which, the mesh number of red phosphorus flame retardant is not less than 1500;

[0057] The A component is made by the following method:

[0058] a. Under negative pressure -0.09Mpa, add red phosphorus flame retardant and heat up to 55℃;

[0059] b. Add PTMEG200, heat up to 115℃, and dehydrate for 100min;

[0060] c. Cool down to 35°C, add MDI, heat up to 75°C, and react for 100 minutes;

[0061] d. Cool down.

[0062] B component:

[0063] Take component B, in parts by weight, PTMEG20070 parts, curing agent 40 parts, red phosphorus flame retardant 50 parts, defoaming agent 1 part, dispersant 1 part, leveling agent 1 part, surface active agent 1 part;

[0064] The B component is prepared by the following method:

[0065] a. Under negative pressure -0.09Mpa, add red phosphorus flame retardant, defoamer, dispersant, leveling agent and sur...

Embodiment 2

[0069] A component:

[0070] Take component A, in parts by weight, 130 parts of polyether glycol, 100 parts of MDI, 70 parts of aluminum hydroxide flame retardant (ATH), and the mesh number of the flame retardant is not less than 1500;

[0071] The A component is made by the following method:

[0072] a. Under negative pressure -0.09Mpa, add aluminum hydroxide flame retardant and heat up to 60℃;

[0073] b. Add polyether glycol, heat up to 120°C, and dehydrate for 120 minutes;

[0074] c. Cool down to 40°C, add MDI, heat up to 80°C, and react for 120 minutes;

[0075] d. Cool down.

[0076] B component:

[0077] Take component B, in parts by weight, 75 parts polyether glycol, 50 parts curing agent, 60 parts aluminum hydroxide flame retardant, 2 parts defoamer, 2 parts dispersant, 2 parts leveling agent, surface active 2 parts;

[0078] The B component is prepared by the following method:

[0079] a. Add aluminum hydroxide flame retardant, defoamer, dispersant, leveling agent and surface act...

Embodiment 3

[0083] A component:

[0084] Take component A, in parts by weight, 135 parts of polyethylene glycol, 110 parts of MDI, and 75 parts of magnesium hydroxide flame retardant. Among them, the mesh number of the flame retardant is not less than 1500;

[0085] The A component is made by the following method:

[0086] a. Add flame retardant under negative pressure below -0.09Mpa and heat up to 58℃;

[0087] b. Add polyethylene glycol, heat up to 120°C, and dehydrate for 130 minutes;

[0088] c. Cool down to 40°C, add MDI, heat up to 80°C, and react for 130 min;

[0089] d. Cool down.

[0090] B component:

[0091] Take component B, in parts by weight, 80 parts of polyethylene glycol, 50 parts of curing agent, 60 parts of magnesium hydroxide flame retardant, 3 parts of defoaming agent, 3 parts of dispersant, 2 parts of leveling agent, surface active 2 parts;

[0092] The B component is prepared by the following method:

[0093] a. Add flame retardant, defoaming agent, dispersant, leveling agent and...

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Abstract

The invention relates to the field of daub materials, in particular to PU (polyurethane) daub and a preparation method thereof. The PU daub mainly comprises a component A and a component B, wherein the component A is mainly prepared from polyether polyols, MDI and a flame retardant; the component B is mainly prepared from polyether polyols, a curing agent, a flame retardant, an antifoaming agent, a dispersing agent, a leveling agent and a surfactant. During usage of the PU daub, the component A and the component B are mixed, the obtained PU daub has the characteristics that the PU daub has better mechanical properties and better waterproofness, and is capable of being cured at the normal temperature, flame-retardant, non-toxic and the like, and is applicable to insides and outsides of sea ships. The technology of the preparation method of the PU daub is simple and easy to implement.

Description

Technical field [0001] The invention relates to the field of cement materials, in particular to a polyurethane cement and a preparation method thereof. Background technique [0002] At present, the water accumulation at the bottom of the tank, the upper longitudinal water accumulation, the longitudinal seam of the flowing water and the drainage system to absorb the accumulated water under the head, etc., due to frequent contact with fresh water, sea water, oil pollution, and easy collisions and friction, are vulnerable to corrosion And defaced. Cement mortar is usually used for treatment, although it can play a certain role, but the overall effect is not obvious. After a period of use, different degrees of cracking and shedding appear, reducing the anti-corrosion effect and affecting the service life of the ship. [0003] The following is the classification and characteristics of the current domestic clay: [0004] (1) The mortar is divided into three categories according to its ty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08K3/02C08K3/22
CPCC08G18/4808C08G18/4825C08G18/7671C08K3/02C08K3/22C08K2003/026C08K2003/2224C08K2003/2227
Inventor 李福运
Owner BEIJING HAIYUEXING SCI & TECH CO LTD
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