US 5,034,464 Curing agent for epoxy resins

Abstract The epoxy resins most widely used in corrosion prevention are liquids of low molecular weight which can be converted to hard, tough, chemically resistant polymers by the use of various curing agents. Unlike other thermosetting resins such as polyesters, the curing agents may produce chemical linkages in the final polymers that differ from those present in the uncured form. Hence, the properties of cured epoxy resins are likely dependent upon, and may even reflect the properties of the curing agent used. Some seven different epoxy resin systems were exposed to various chemical environments and evaluatd for changes in dimensional stability and flexural strengths over a six month period. From the data presented herein, only limited conclusions may be drawn. Heat cured systems fare better than room temperature cured systems in every case. Anhydride cured epoxy resins show greater resistance to outdoor weathering than amine cured systems. 5.4.5, 6.6.8

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Thermal Behavior of Epoxy Resins Cured with an Amine-Containing, Thermoplastic Poly(arylene Ether Sulphone)

Journal of Polymer Engineering ◽

10.1515/polyeng-1999-0303 ◽

1999 ◽

Vol 19 (3) ◽

pp. 161-174 ◽

Cited By ~ 4

Author(s):

Oriana Motta ◽

Antonino Rocca ◽

Valentina Siracusa ◽

Domenico Acierno

Keyword(s):

Differential Scanning Calorimetry ◽

Thermal Behavior ◽

Kinetic Parameters ◽

Epoxy Resins ◽

Curing Agent ◽

Cure Process ◽

Scanning Calorimetry ◽

Arylene Ether ◽

Diaminodiphenyl Methane ◽

Residual Heat

Abstract In this paper we carried out the crosslinking of the tetraglycidyl-4,4′- diaminodiphenyl methane epoxy resin by using a reactive poly(arylene ether sulphone) as curing agent. Differential scanning calorimetry was used to derive the kinetic parameters of the reactions involved in the cure process and to evaluate the extent of the reaction as a function of time by measuring the total (ΔHr) and the residual heat(ΔHresid) of the resin at different curing times. A comparatively slower reaction was found to take place when the resin was cured with the poly(arylene ether sulphone) that when it was cured with the conventional curing agent 4,4′-diaminodiphenyl sulphone.

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Thermal latent curing agent for epoxy resins from neutralization of 2‐methylimidazole with a phosphazene‐containing polyfunctional carboxylic acid

Polymers for Advanced Technologies ◽

10.1002/pat.4884 ◽

2020 ◽

Vol 31 (7) ◽

pp. 1553-1561

Author(s):

Wei Wei ◽

Xin Sun ◽

Weitao Ye ◽

Bowen Zhang ◽

Xiaoma Fei ◽

...

Keyword(s):

Carboxylic Acid ◽

Epoxy Resins ◽

Curing Agent

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Improving thermal and flame-retardant properties of epoxy resins by a new imine linkage phosphorous-containing curing agent

Polymer Engineering & Science ◽

10.1002/pen.24270 ◽

2016 ◽

Vol 56 (4) ◽

pp. 441-447 ◽

Cited By ~ 15

Author(s):

Cong Xie ◽

Jifu Du ◽

Zhen Dong ◽

Shaofa Sun ◽

Long Zhao ◽

...

Keyword(s):

Flame Retardant ◽

Epoxy Resins ◽

Curing Agent ◽

Flame Retardant Properties

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U.S. 4,621,128 Curing agent for epoxy resins

Additives for Polymers ◽

10.1016/0306-3747(87)90472-6 ◽

1987 ◽

Vol 17 (3) ◽

pp. 14

Keyword(s):

Epoxy Resins ◽

Curing Agent

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Effect of Molecular Weight on Phase Diagram of Epoxy/Polyetherimide-Siloxane Blends

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.189-193.1127 ◽

2011 ◽

Vol 189-193 ◽

pp. 1127-1131

Author(s):

Xiao Yan Li ◽

Wen Jun Gan ◽

Yuan Ren ◽

Zheng Xi ◽

Ye Wen Tang ◽

...

Keyword(s):

Phase Diagram ◽

Molecular Weight ◽

Cloud Point ◽

Epoxy Resins ◽

Optical Microscope ◽

Curing Agent ◽

Curing Time ◽

Point Curve ◽

Cloud Points ◽

Cloud Point Curve

The cloud points of blends epoxy/polyetherimide-siloxane (PEI-Siloxane) without or with curing agent methyl tetrahydrophthalic anhydride (Me-THPA) after different curing time (1min, 2min, 3min) at 150oC were determined by optical microscope. The cloud point curve for uncured and cured after different time was then obtained from the experimental results with different composition. The effects of molecular weight of epoxy on phase diagram were discussed. The miscibility of blends will be taken into account in the toughing of epoxy resins by thermoplastic PEI-Siloxane copolymer later.

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