Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1978-11-20
1980-09-09
Person, Sandra M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
525444, 525448, C08K 714
Patent
active
042216940
ABSTRACT:
This invention relates to a thermoplastic polymeric composition which comprises a glass fiber-filled polybutylene terephthalate and which contains as an improvement a warp-inhibiting amount of a polymeric additive consisting of a linear aromatic substantially halogen-free polyester consisting of a bisphenol monomer residue and a dicarboxylic acid monomer residue and having a relatively low intrinsic viscosity. The compositions exhibit substantially diminished warpage on molding without a deleterious effect on the other properties of the glass fiber-filled polybutylene terephthalate. Preferred compositions of the invention also exhibit enhanced tensile strength compared to comparable pure glass fiber-filled polybutylene terephthalate.
REFERENCES:
patent: 3907926 (1975-09-01), Brown et al.
patent: 3946091 (1976-03-01), Sakata et al.
patent: 4013613 (1977-03-01), Abolins et al.
patent: 4064098 (1977-12-01), Saitoh et al.
patent: 4111893 (1978-09-01), Gasmon et al.
patent: 4123420 (1978-10-01), Kyo et al.
J. A. Brydson, Plastics Materials (1966), p. 336.
Chem. Abs., para. 83:80466h (1975).
Casella Peter F.
Hooker Chemicals & Plastics Corp.
Mudd James F.
Person Sandra M.
Stein David A.
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