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
1989-10-10
1991-08-13
Jacobs, Lewis T.
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...
524539, 525444, C08L 6702, C08L 9106
Patent
active
050397273
ABSTRACT:
Thermoplastic polyester compositions comprising at least two groups of polybutylene terephthalate with substantially different intrinsic viscosity values and conventional additives for molding having an improved thermal flow capability under molding conditions expressed in such indices as heat flow (m cal/sec), enthalphy change .DELTA.Hm(Joule/gr) at the solidification of fused polymer, crystalline fraction (Xc), and the time of growth to (sec) of the primary nuclei of embryonic crystalline. The polymer compositions of the present invention result in a larger size of crystalline than the case of independent, single polymer and this enables to carry out injection moulding at about 20 degrees lower cylinder temperature than usual molding practice without sacrificing mechanical and thermal properties of the product.
REFERENCES:
patent: 4132707 (1979-01-01), Horman
patent: 4140670 (1979-02-01), Charles et al.
patent: 4315882 (1982-02-01), Hiratsuka et al.
patent: 4593077 (1986-06-01), Borman et al.
Kubo Yoshinobu
Nozaki Takao
Onishi Yasuhiko
Bierman Jordan B.
Jacobs Lewis T.
Sumitomo Wiring Systems Ltd.
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