Thermosetting resin adhesives

Usage of phosphoms-based flame retardants for 1994 in the United States has been projected to be 150 million (168). The largest volume use maybe in plasticized vinyl. Other use areas for phosphoms flame retardants are flexible urethane foams, polyester resins and other thermoset resins, adhesives, textiles, polycarbonate—ABS blends, and some other thermoplastics. Development efforts are well advanced to find appHcations for phosphoms flame retardants, especially ammonium polyphosphate combinations, in polyolefins, and red phosphoms in nylons. Interest is strong in finding phosphoms-based alternatives to those halogen-containing systems which have encountered environmental opposition, especially in Europe. 

Roh, J. K., Higuchi, M., and Sakata, I., Curing behaviour and bonding properties of thermosetting resin adhesives. V. Cocondensation reaction of phenol with melamine, Mokuzai Gakkaishi. 36, 42, 1990 Chem. Abstr., 113, 41891, 1990. 

Nanoclay, phenol-formaldehyde resins, phenol-urea-formtildehyde resins, thermosetting resins, adhesives... 

Because thermosetting-resin adhesives, when cured, are densely cross-linked, their resistance to heat and solvents is good, and they show little... 

Certain general categories are also listed, such as alloys, aromatic polymer, conductive, delayed-tack, elastomeric adhesives, anaerobic, film and tape adhesives, hot-melt adhesives, inorganic glues, microencapsulated adhesives, rubber-based adhesives, solvent-based systems, thermoplastic resin adhesives, thermosetting-resin adhesives, and water-based adhesives. 

Progressive bonding n. A method of curing thermosetting-resin adhesives in laminates or plywood slabs that are larger in area than the press platens in which they are being bonded. A partial area, say, a quarter of the laminate, is cured by application of heat and pressure. The press is then opened, and a different quarter of the laminate is moved between the platens and... 

Because thermosetting resin adhesives, when cured, are densely cross-linked, their resistance to heat and solvents is good, and they show little elastic deformation under load at elevated temperatures. Bonds are able to withstand temperatures of 93—260°C and peel strength is fair. The major application is for stressed joints at somewhat elevated temperatures. Most materials can be bonded with thermosetting adhesives, but the emphasis is on structural applications [7]. Examples of thermosetting adhesives are given in Table 4.1. 

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