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Epoxy coating systems using polycyclic polyamines as epoxy hardeners

一种多环多胺、环氧的技术，应用在环氧树脂涂料、涂层、薄料处理等方向，能够解决混合困难、反应慢、比率偏离统一性等问题

Inactive Publication Date: 2014-11-05
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3LPO systems provide superior coating properties, but still have disadvantages
Mixing is more difficult if the ratio of epoxy part to hardener part (or vice versa) deviates significantly from uniformity
It has been found that hardeners provided with proper mixing ratios may tend to react too slowly with epoxy functional materials

Method used

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  • Epoxy coating systems using polycyclic polyamines as epoxy hardeners
  • Epoxy coating systems using polycyclic polyamines as epoxy hardeners
  • Epoxy coating systems using polycyclic polyamines as epoxy hardeners

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0117] Examples 1-3: Physical Properties and Cure Kinetics

[0118] Three formulations (Ex1 to Ex3) were prepared according to the graph shown in Table 1 to study the effect of the amine hardener on the physical properties of the cured coupons and the curing properties of the formulations. As shown in Table 2, BPEA (Ex 2) improves the toughness of the test pieces as follows: Tensile strength and ultimate elongation increase up to 50% compared with triethylenetetramine (TETA, Ex 1), while the glass transition temperature (Tg) decreased by 8°C. A 50:50 blend of BPEA and Jeffamine T403 with the same AEW not only resulted in a drop in tensile strength to the level of the TETA-cured test piece, but also T g down to 35°C. same, figure 2 It was shown that the overall cure kinetics were accelerated with BPEA compared to TETA, whereas Jeffamine T403 slowed the reaction significantly. In the case of using BPEA, the time for the viscosity of the formulation to reach 1 Pa.s at 80°C...

Embodiment 12

[0134] Example 12: Water absorption properties

[0135] It has been observed that BPEA tends to increase the hydrophilicity of the coating. One way to solve this problem is to mix BPEA with other amine curing agents that are less sensitive to water penetration when cured with epoxy resins. Ex4, Ex5, and their mixtures were used to further study the effect of BPEA on water swelling. The proportions of the two examples were varied gradually such that the amount of BPEA was 0% to 100% relative to the total amount of BPEA and TETA. Figure 4 illustrates the % change in weight and tensile properties of coupons cured with varying combinations of TETA and BPEA before and after water immersion testing. As the amount of BPEA in the amine mixture was increased, the water absorption of the test pieces increased continuously from 2.8% to 3.7%. However, the tensile strength and modulus of the "wet" test pieces remained almost constant, being less than 20% of the initial value, up to 50...

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Abstract

The present invention relates to epoxy coating formulations that comprise an epoxy functional component comprising at least one epoxy functional ingredient comprising an average of at least 1.5 epoxy moieties per molecule; and an amine functional component comprising at least one polycyclic polyamine that comprises (i) a first cyclic structure comprising a first cyclic backbone, a first tertiary amine moiety having a first tertiary nitrogen atom that is a constituent of the first cyclic backbone, at least one additional amine moiety having a nitrogen atom that is a constituent of the first cyclic backbone, and optionally one or more additional amine moieties present in the cyclic backbone and / or in one or more groups pendant from the first cyclic backbone; (ii) a second cyclic structure comprising a second cyclic backbone, a second tertiary amine moiety having a second tertiary nitrogen atom that is a constituent of the second cyclic backbone, at least one additional amine moiety having a nitrogen atom that is a constituent of the second cyclic backbone, and optionally one or more additional amine moieties present in the cyclic backbone and / or in one or more groups pendant from the second cyclic backbone; and (iii) at least one linking group interconnecting the first tertiary nitrogen atom to the second tertiary nitrogen atom; and wherein the polycyclic polyamine has on average greater than one active amine moiety per molecule.

Description

[0001] priority [0002] This application claims U.S. Provisional Application 61 / 581,323, filed December 29, 2011, entitled "FORMATION OF HIGHER MOLECULAR WEIGHT CYCLIC POLYAMINE COMPOUNDS FROM CYCLIC POLYAMINE COMPOUNDS," and filed October 24, 2012, entitled "EPOXY COATING SYSTEM USING POLYCYCLIC POLYAMINES AS EPOXY HARDENERS" US PROVISIONAL APPLICATION 61 / 717,990, which are hereby incorporated by reference in their entirety. technical field [0003] The present invention relates to curable epoxy compositions comprising epoxy-functional ingredients and amine-functional ingredients as epoxy hardeners, wherein at least a portion of the functional ingredients include polycyclic polyamines. In particular, the invention relates to the use of such compositions to form at least a portion of a protective coating system on metal substrates such as oil and gas pipelines. Background technique [0004] Thermoset epoxy-functional compositions are used to form tough, resilient, water-re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C08L63/00
CPCC08L63/00C08G59/5073Y10T428/1355Y10T428/31511B05D1/36B05D3/002C09D163/00
Inventor K·张
Owner DOW GLOBAL TECH LLC