桐油改性胺的制备及其在环氧防腐涂料中的应用性能

doi:10.3969/j.issn.0253-2417.2023.06.014

Abstract

Abstract:

In order to improve the flexibility, corrosion resistance, water resistance and low temperature curing ability of polyamine curing agent, a new type of tung oil-modified amine(TPH) curing agent was synthesized from tung oil through transesterification, Friedel-Crafts substitution, Mannich base condensation and amidation. The physicochemical indicators were characterized. The effect of the addition amount of monofunctional(benzyl glycidyl ether) and difunctional(1, 4-butanediol diglycidyl ether) reactive diluent on the coating properties, and the mechanical properties and anti-corrosion properties of the coating were tested, which were compared with the properties of the cardanol phenalkamine(PCD) cured paint film. The results showed that when the amount of diluent in the anti-corrosion coating was 10%, the tack-free and hard drying time of TPH paint film surface was 40 and 90 min, respectively. Its impact toughness was 80 cm, flexibility was 1 mm, pencil hardness was 5H, and impact resistance was ≥40 cm. Heat resistance(150 ℃±3 ℃, 4 h) showed slightly foaming paint film without falling off, the heat and humidity resistance was 1 000 h under the temperature of 47 ℃±1 ℃, and the relative humidity of 96%±2%, and salt spray resistance showed no rust, no bubbles, and no discoloration(1 500 h). The hardness of aviation kerosene (168 h) was up to 4H, and 4109 engine lubricant(121 ℃±3 ℃, 24 h) and 15# hydraulic oil(66 ℃±3 ℃, 24 h) all showed non-foaming and non-falling off. Compared with PCD film, TPH film had excellent impact flexibility, pencil hardness, high and low temperature resistance and solvent resistance.

Key words: tung oil-modified amine, cardanol phenalkamine, mechanical property, anti-corrosion property

CLC Number:

TQ35

Na YAO, Xiaohua YANG, Jianling XIA, Mei LI, Yan ZHANG. Preparation of Tung Oil-modified Amine and Its Application Performance in Epoxy Anti-corrosion Coatings[J]. Chemistry and Industry of Forest Products, 2023, 43(6): 107-112.

Figures/Tables 4

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References 21

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样品 sample	胺值/(mg·g^-1) amine value	黏度/(mPa·s, 25 ℃) viscosity	含固量/% solid content	表干时间/min tack-free time	实干时间/min hard drying time
TPH	218	4 200	80	40	90
PCD	275	1 080	99	70	120

力学性能mechanical properties	PCD	TPH
附着力adhesion/MPa	22~25	21~25
光泽(清漆) gloss(varnish)	极好excellent	哑光matte
柔韧性flexibility/mm	2	1
硬度hardness	4H	5H
低温柔韧性(-55 ℃±2 ℃, 2 h) low temperature flexibility	漆膜无裂纹，不脱落 paint film shows no cracks and not fall off	漆膜轻微裂纹，不脱落 paint film shows slight crack and not fall off
耐热性heat resistance(150 ℃±3 ℃, 4 h)	漆膜不起泡，不脱落 paint film shows non-foaming and not fall off	漆膜轻微起泡，不脱落 paint film shows slight foaming and not fall off
耐冲击性impact resistance/cm	60	80

防腐性能 corrosion resistance	PCD	TPH
耐航空煤油(168 h)硬度 resistant aviation kerosene(168 h) hardness	2H	4H
耐湿热wet-heat resistance(47 ℃±1 ℃，相对湿度relative humidity 96%±2%，1 000 h)	无生锈、无气泡、无变色 no rust, no bubbles, or discoloration	无生锈、无气泡、无变色 no rust, no bubbles, or discoloration
耐盐雾1 500 h salt spray resistance for 1 500 h	无生锈、无气泡、无变色 no rust, no bubbles, or discoloration	无生锈、无气泡、无变色 no rust, no bubbles, or discoloration
耐盐雾1 500 h划叉锈蚀宽度 salt spray resistance 1 500 h, cross corrosion width	单侧最大3 mm，双侧5 mm maximum 3 mm on one side and 5 mm on both sides	单侧最大3 mm，双侧5 mm maximum 3 mm on one side and 5 mm on both sides
耐4109发动机润滑油(121 ℃±3 ℃, 24 h) resistant 4109 engine lubricating oil	漆膜轻微起泡，不脱落 paint flim shows slight foaming and not fall off	漆膜不起泡，不脱落 paint flim shows non-foaming and not fall off
耐15#液压油(66 ℃±3 ℃, 24 h) resistant to 15# hydraulic oil	漆膜轻微起泡，不脱落 paint flim shows slight foaming and not fall off	漆膜不起泡，不脱落 paint flim shows non-foaming and not fall off
耐丁酮擦拭性 resistance to butanone wiping	涂层不脱落 coating does not fall off	涂层不脱落 coating does not fall off
耐水性(去离子水, 7天, 硬度) water resistance(deionized water, 7 days, hardness)	4H	5H

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Preparation of Tung Oil-modified Amine and Its Application Performance in Epoxy Anti-corrosion Coatings

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