Diamine curing agents

As shown in Tables III and IV, for both cure schedviles, modulus and Tg display inverse relationships upon varying the diamine curing agent. This is in agreement with a previous r rt (3). In standard cured samples, thermal stability of the... 

The diamine curing agents HjNfCH NHj (n = 2, 3, 4, 6) have been taken as an example (cf. Table 2). 

Covers a two-part epoxy-resin system in the form of a bisphenol "A" epoxy resin filled with fumed silica and carbon microspheres and a separate aromatic diamine curing agent. 

A number of different hindered diamines have been investigated as a substitute for MOCA (1). In addition to diamine curing agents, which are used most frequently with elastomers based on polyether polyols and toluene diisocyanate (TDI), prepolymers based on polyether or polyester polyols and 4,4 -diphenylmethane diisocyanate (MDI), can be cured with diols to yield elastomers with similar properties to those of diamine-cured polyester-TDI elastomers. The most common chain extender is butanediol. However, to achieve improved mechanical properties, especially at elevated temperatures, aromatic diols are often used. The most common one is hydroquinone di-(beta-hydroxy-ethyl) ether (HEQ). 

Polamine . [AirPro. ] Oligomeric diamines curing agents for dastomer, coatings, and adhesives sq cs. 

A diamine curing agent for polyurethanes introduced in 1976 to replace the popular but toxic MOCA . It is very soluble in a variety of coating solvents. 2,2,4-Trimethyl-l,6-hexane diisocyanate... 

COMMON COMMERCIALLY AVAILABLE DIAMINE CURING AGENTS FOR LIQUID POLYURETHANE ELASTOMERS... 

The physical properties of polyurethane elastomers using these diamine curing agents/chain extenders are given in Tables 5.7(c)-(m). 

All the monomers (I, n, IRC, and IVC, see Table 1) were converted to prepolymers before the polymerization process. A typical prepolymer synthesis is as follows In a small reaction vial 2 g of phthalonitrile monomer (IC) was heated above the melting point in air. To the melt was added (0.06 g) 3 wt % of diamine curing agent 4,4 -oxydianiline(ODA) and stirred well for about 3 min. Once the sample became homogeneous, it was quenched to room temperature. The obtained amorphous sohd (B-stage resin) was ground well and used for polymerization (Laskoski et al., 2005). 

Reaction between PVDF and diamine curing agent produces alterations in the polymer s surface, which enables the formation of strong adhesive joints without prior surface modification [31]. 

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