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Diethylene glycol monomethyl ether resistant coating

一种涂料、硫醇的技术，应用在环氧树脂涂料、聚脲/聚氨酯涂料、涂层等方向，能够解决没有提供足够耐酸性耐微生物副产物性、消耗飞机燃料系统塑料和橡胶组分、产生酸性代谢副产物等问题

Active Publication Date: 2013-07-31
PRC DE SOTO INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, jet fuel contains microorganisms that consume the plastic and rubber components of the aircraft fuel system and produce acidic metabolic by-products
Conventional epoxy-based coating compositions, which include amine-based cure systems, exhibit acceptable adhesion, but do not provide adequate acid and / or microbial by-product resistance
In contrast, conventional coating compositions, which include polyurethane-based curing systems, exhibit acceptable acid and microbial by-product resistance, but do not provide adequate adhesion to substrates, especially direct adhesion to metal substrates

Method used

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  • Diethylene glycol monomethyl ether resistant coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0165] Example 1: Synthesis of polysulfide containing polyol

[0166] The reaction between epoxy resin (Epon1001F) and thiol-terminated polysulfide (Permapol P-3.1E) is carried out at 125-130°C. The ratio of epoxy equivalent to mercaptan equivalent is approximately 3.5:1.0. The amount of each reactant is listed in Table 1 below. The reaction is monitored by thiol equivalent titration, and a high thiol equivalent indicates completion of the reaction. A polysulfide solution containing polyol with the following properties was obtained: NVM: 70.0%, weight / gallon (WPG): 8.96 lb / gal, OH equivalent (theoretical): 1141 at 70% NVM, mercaptan equivalent : At 70% NVM, it is 1803917.

[0167] Table 1

[0168] Preparation of sulfur-containing epoxy functionalized polyol

[0169]

Embodiment 2

[0170] Example 2: Synthesis of polysulfide containing polyol

[0171] The reaction between epoxy resin (Epon1001F) and thiol-terminated polysulfide Thioplast G-1 is carried out at 125-130°C. The ratio of epoxy equivalent to mercaptan equivalent is 3.5:1.0. The amounts of reactants are listed in Table 2 below. The reaction is monitored by thiol equivalent titration, and a high thiol equivalent indicates completion of the reaction. A polysulfide solution containing polyol with the following properties was obtained: NVM: 70.0%, WPG: 8.96 lb / gal, OH equivalent (theoretical): 1141 at 70% NVM, and mercaptan equivalent: at 70% NVM It is 1283800.

[0172] Table 2

[0173] Preparation of sulfur-containing epoxy functionalized polyol

[0174]

Embodiment 3

[0175] Example 3: Polysulfide coating formulation

[0176] The sulfur-containing, epoxy-functionalized polyol prepared according to Example 1 was used to prepare the coating composition. The amounts of sulfur-containing, epoxy-functionalized polyol and other components of the coating composition are listed in Table 3.

[0177] table 3

[0178] Preparation of DIEGME fuel tank paint

[0179]

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PUM

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Abstract

Diethylene glycol monomethyl ether resistant coatings include a base component including a sulfur-containing, epoxy functional polyol, and an activator component including an isocyanate curing agent.

Description

[0001] Statement regarding federally funded research or development [0002] The present invention was carried out with government support under Contract No. FA8650-05-C-5010 approved by the Air Force Research Laboratory (AFRL). The US government may have certain rights in this invention. Invention field [0003] The present invention relates to a coating composition resistant to diethylene glycol monomethyl ether (DIEGME). More specifically, the present invention relates to such a coating composition that includes a sulfur-containing, epoxy-functional polyol and an isocyanate curing agent. Background of the invention [0004] Conventional civil aviation and aerospace fuel tank coatings such as BMS10-39 will be degraded by certain fuel additives such as DIEGME. At high concentrations, DIEGME chemically degrades conventional epoxy-based fuel tank paint or coatings, causing the topcoat to peel off. Chemical degradation of conventional epoxy-based paints or coatings can cause specif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D181/02C09D181/04C09D175/04
CPCC08G59/302C08G18/581C09D175/04C08G59/182C08G59/066C09D181/02C08G59/4028C09D163/00C09D181/04C08G18/585
Inventor S·阿布拉米J·宋唐广粮
Owner PRC DE SOTO INT INC
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