Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1995-03-13
1996-11-26
Bluetge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
528111, C08J 1124, C08G 5964
Patent
active
055786499
ABSTRACT:
Disclosed herein are a process for producing an epoxy adhesive auxiliary which is a liquid reclaimed from rigid polyurethane foam and an epoxy adhesive which contains the auxiliary. The epoxy adhesive auxiliary can be produced, without requiring any special apparatus for purification, by incorporating rigid polyurethane foam (200 g) in powder form (5-10 mm in size) with glycol such as polyethylene glycol (100 g) and amino alcohol such as 2-aminoethanol (5 g), and heating them at 150.degree.-280.degree. C., thereby chemically decomposing the rigid polyurethane foam into a viscous liquid. This reclaimed liquid (50-300 g) is incorporated as such into an epoxy resin adhesive base such as bisphenol A-type epoxy resin (100 g), containing optional diethylamine (6-8 g). The resulting epoxy resin adhesive is superior in tensile shear bond strength.
REFERENCES:
patent: 4014809 (1977-03-01), Kondo et al.
patent: 4110266 (1978-08-01), Sheratte
Derwent Abstract #84-192364/31, of JP 59109512-A or J91003689-B.
English translation of Abstract of Japanese Laid-Open No. Hei 3-3689.
Fei-Feng He
Hidai Takao
Imai Yoshio
Shu-Chang Xue
Bluetge John C.
Inoac Corporation
Wilson D. R.
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