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Aromatic amine coating crosslinking agent
2017-7-9 15:29:07
Aromatic amine coating crosslinking agent
The crosslinking properties of several aromatic amines crosslinking agents and epoxy resins were studied, and an aromatic amine crosslinking agent for CCL was determined. The reactivity of several aromatic amine crosslinking agents was tested by gelation and DSC scanning, and the dielectric properties of the resin castings were tested.
The results show that the excellent performance of MOCA cross-linking agent is excellent, the performance of Ethacure 100 cross-linking agent is excellent, the crosslinking temperature of DDS crosslinker is relatively high, and it is relatively difficult to use. Finally, the Ethacure 100 crosslinking agent was used to crosslink the phenolic epoxy resin to prepare the copper clad laminate (CCL) and the basic properties of the sheet were tested.
Aromatic amine cross-linking agent in the molecular structure contains a stable benzene ring structure, amine directly connected with the benzene ring. Due to the main barrier of the benzene ring, the crosslinking reactivity with the epoxy resin is less than that of the aliphatic amine. Due to the presence of the benzene ring, the crosslinked product has high heat resistance and good water resistance, electrical properties and mechanical properties performance. So in the aerospace materials and insulation materials industry has great application prospects.
Commonly used aromatic amine crosslinking agent is diaminodiphenyl methane (DDM), diaminodiphenyl sulfone (DDS) and so on, and 3,3 - diethyl - 4, 4 - diaminodiphenyl methane (DEDDM) (MOCA) and Diethyltoluenediamine (Ethacure 100), the performance of these aromatic amines is rare, especially the Ethacure 100 cross-linking agent is a liquid , Low viscosity, low toxicity aromatic amine cross-linking agent, particularly suitable for resin casting and laminates, the current cross-linking agent has not been reported.
Experimental raw materials. DDM: industrial grade; DDS: industrial grade; MOCA: industrial grade; Ethacure100: industrial grade; DEDDM: industrial grade; o-methyl phenolic epoxy resin: epoxy equivalent 200 ~ 240g / mo, l industrial grade.
Experimental instrument gelling tester: GT! Type; Dielectric constant tester: HP4921 type; Differential scanning analysis: DSC204, heating rate 10? / Min; Steam press; Peel strength tester: ASIDALTIIA type; Impedance tester : 4339B; material testing machine: ROELLZ005.
Chinese name: Diethyl toluene diamine(DETDA)Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Preparation of sample preparation glue: o-methyl phenolic epoxy resin / aromatic amine cross-linking agent = 1/1 (epoxy and amine active hydrogen theoretical equivalent), which DDS and MOCA system by adding a small amount of trifluoro Boron monoethylamine as accelerator.
Preparation of Resin Casting: The prepared glue was poured into a previously prepared mold and coated with a release agent. Then put the mold into a vacuum oven, 60 vacuum 8h. Then the program heats up.
The warming procedure is as follows: 120? / 2h + 140? / 2h + 160? / 2h.
Gelation experiment Thermosetting polymer in the process of forming the polymer will appear gelation phenomenon, that is, when the reaction to a certain extent, the reaction system will suddenly increase the viscosity, suddenly converted into insoluble, non-melting, with cross-linking Shaped structure of the elastic gel.
The degree of reaction at this time is called the gel point, and the time to reach the gel point is the gelation time. Gel time is too long or too short are not conducive to industrial production, the appropriate gel time for experimental and industrial production control is of great significance. Since the degree of reaction of the resin at the gel point is equal, the rate of the resin reaction can be expressed by the gelation time.
At a certain temperature, the shorter the gelation time of the resin, the faster the reaction rate, the higher the activity of the resin; the longer the gelation time of the resin, the slower the reaction rate and the lower the activity of the resin.
The gelation time of the DDS and MOCA conditions was very low and almost no reaction under the conditions of high temperature without accelerator; DDM Of the highest reactivity, followed by DEDDM, Ethacure100 center.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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