CO-CURING AGENT

Ch1orocarhony1trime11itic acid 1,2-anhydride [1204-28-0] (9), is used in the preparation of esters and amide—imide polymers. TriaHyl trimellitate [2694-54-4] (10) is used as a cross-linking or co-curing agent for ethylene-derived mbbers and plastics. 

Aliphatic aldehydes, 13 571 physical properties of, 2 60t syntheses of, 12 187 Aliphatic a-hydroxy acids, 14 130 Aliphatic amine/polysulfide co-curing agent systems, 10 410... 

The poor performance with 13 and 14 could be substantially Improved by adding a blocked tetraol, pentaerythrltol diacetonide (pentaerythrltol Itself Is Insolublle In toluene), as a co-curing agent. This option Is discussed In more detail below. 

EMI cured epoxy adhesive formulations are claimed to have outstanding adhesion to metals, and for this reason it is added as a co-curing agent in many compositions. It is an excellent anhydride accelerator providing higher thermal resistance than typical tertiary amine accelerators. 

Non-epoxy-containing reactive diluents. The reactive nonepoxy diluents consist of co-curing agents, unsaturated molecules, active hydrogen-containing molecules, materials which are capable of promoting... 

To form a film via this method, a mixture of pigment, monomer, polymer, photoinitiator, and inhibitor are applied to a substrate and polymerized by controlled exposure to uv radiation. Polymers used as co-curing agents often have unsaturated methacrylate functionalities attached higher order acrylates are often used as the solvent in photocure mixtures. 

With more acidic hydrogen donors such as benzyl alcohol, phenols, or mer-captans, the tertiary amine acts as a co-curing agent by first abstracting the proton from the hydrogen donor ... 

Commonly used tertiary amines include 2-dimethylaminomethylphenol (DMAMP) and 2,4,6-tris(dimethylaminomethyl)phenol (TDMAMP, trade name DMP-30 of Rohm and Haas), which contain built-in phenolic hydroxyl groups and can be used as a good catalysts and co-curing agents for room temperature cure of epoxies. 

Cyclic amidines such as 2-phenylimidazoline have also been used as a catalyst and co-curing agent in epoxy-polyester and epoxy powder coatings. 

The reaction between the terminal mercaptan and epoxide group proceeds very slowly at ambient temperature. However, the introduction of a basic material such as a tertiary amine greatly accelerates the cure. Poly sulfides are typically used at ratios of 1 1 or less with epoxy resins, and can be used as co-curing agents with aliphatic amines. Stoichiometric quantities of aliphatic amine and 25 to 50 parts by weight of polysulfide will react with 100 parts by weight of epoxy resin. 

Polysulfide/epoxy systems accelerated with tertiary amines exhibit good flexibility and tensile strength at ambient temperature. The aliphatic amine/polysulfide co-curing agent systems yield improved initial elevated tern-... 

The effect of TMPTA co-curing agent on the curing behaviour, physical properties and ageing properties of... 

Saret acrylic and methacrylic acid salts (Sartomer) were compared withtriallyl cyanurate as co-curing agents in the peroxide vulcanisation of EPDM compounds for a number... 

System Resin DGEBA (Shell Epikote 828) Curing Agent 1,3-bisaminomethylcyclohex ane (1,3-BAC) (Mitsubishi Gas Chemical Co.)... 

Diglycidyl ether of bisphenol-A (DGEBA), epoxy resin (YD 128, Kuk Do Chem., Mn = 378), and bisphenol-A dicyanate (BPACY, Arocy B-10, Ciba-Geigy) were used as the thermoset resin. 4,4 -diaminodiphenyl sulfone (DDS, Aldrich Chem. Co.) was used as a curing agent for epoxy. Polyetherimide (PEI, Ultem 1000, General Electric Co., M = 18,000) and 2-methyl imidazole (2MZ, Aldrich Chem. Co.) were used as the thermoplastic modifier and catalyst. 

Dynamic Mechanical Measurements. Films were prepared by casting the acetone solution of sample No. 2 onto a Teflon sheet after adding curing agents. The sample was allowed to stand at room temperature for one day, and then cured at 130°C for 2 hours. The dynamic mechanical spectroscopic data were measured in tension with a Rheovibron DDV-II (Toyo Baldwin Co. Ltd.) at a frequency of 110 Hz with a heating rate of about l°C/min. 

The molecular structure of epoxy/metal interphases in the presence of an amino coupling agent was studied by Boerio and co-workers [28] by IR and by XPS. The formation of amide and imide groups in the interphase provided evidence of chemical reaction between the silane primer and the curing agent for epoxy resin. 

The adhesive used in this study consisted of Epon 828 (Shell Chemical Co.) cured with 10 phr (parts per hundred resin by weight) of triethylenetetraamine (TETA) (Fisher Scientific Co.). The resin was degassed in a vacuum oven at 50°C, combined with the curing agent, and then mixed for about I min using a magnetic stirrer. 

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