C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3037, 400/45
C08L 67/00 (2006.01) C08L 9/00 (2006.01) C08L 23/16 (2006.01) C08L 31/04 (2006.01) C08L 53/00 (2006.01) C08L 53/02 (2006.01) C08L 67/02 (2006.01)
Patent
CA 1319772
ABSTRACT OF THE DISCLOSURE In general, blow moldable or extrusion grade polyesters are quite expensive. A relatively inexpensive blow moldable polyester composition can be produced by modifying a low or injection molding grade of polyester with sufficient elastomer to reduce the viscosity of the injection molding grade polyester to a level at which the latter can be blow molded. For example, a copolyester prepared by transesterification using readily available starting materials such as dimethyl terephthalate polytetramethylene ether glycol and 1,4-butanediol can be mixed with an elastomer selected from the group consisting of ethylenepropylene diene terpolymer, ethylenepropylene diene terpolymer in combination with high density polyethylene, ethylene-vinyl acetate thermoplastic copolymer, and styrene- ethylene-butylene-styrene block copolymer to yield a relative inexpensive molding grade polyester composition.
577283
Abc Group
Seaby & Associates
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