Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1992-01-27
1992-12-08
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524271, 524272, C08L 9304
Patent
active
051698897
ABSTRACT:
Hot melt adhesive compositions are prepared from 20 to 90% by weight of a linear polyester of 3-hydroxybutyric and 3-hydroxyvaleric acids containing 9 to 35% of the hydroxyvalerate component; 10 to 80% by weight of a polar tackifier having a Ring and Ball softening (as described by ASTM E-26) greater than about 60.degree. C.; 0 to 50% by weight of a plasticizer; 0 to 30% by weight of a wax diluent and 0-3% by weight of a stabilizer; 0-20% of a compatible polymer. By utilizing a naturally occurring, thermoplastic, biodegradable copolymer as the base polymer, these adhesives advance the state of the art of hot melt adhesives by alleviating the dependence on petroleum based materials and by allowing for the development of hot melt adhesives which either degrade naturally after coming in contact with the soil or which can be composted.
REFERENCES:
patent: 4477654 (1984-10-01), Holmes et al.
patent: 4876331 (1989-10-01), Doi
patent: 4900299 (1990-02-01), Webb
patent: 4997909 (1991-03-01), Doi
patent: 5023081 (1991-06-01), Trai et al.
PHBV.TM., Biodegradable Polyesters; Natural, Thermoplastic, Biodegradable; Trade literature supplied by ICI Americas Inc., Wilmington, Del.
Brady Francis X.
Kauffman Thomas
Puletti Paul P.
Raykovitz Gary
Dec Ellen T.
DeWitt LaVonda R.
Michl Paul R.
National Starch and Chemical Investment Holding Corporation
Szala Edwin M.
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