Process of making a blend of PET and PBT

Details Process of making a blend of PET and PBT Process of making a blend of PET and PBT

1988-06-23

1990-04-10

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

2642105, 2642356, 264178R, 525444, 528481, B29C 3516, B29C 5504, B29C 7102

Patent

active

049158856

ABSTRACT:
A process of preparing a homogeneous amorphous polymeric blend of polyethyleneterephthalate (PET) and polybutyleneterephthalate (PBT) which includes intimately mixing the PET and PBT at a weight ratio of about 10:90-90:10, melting the mixture at 290.degree.-330.degree. C., cooling the mixture to 0.degree.--194.degree. C. by extruding it onto rollers maintained in a cooling bath and orienting the polymer of the resulting continuous shaped object at room temperature to a draw ratio of about 5:1, with subsequent annealing at about 120.degree.-180.degree. C. for about one hour.

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patent: 4593077 (1986-06-01), Borman et al.
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patent: 4788017 (1988-11-01), Schlomer et al.
Ciferri and Ward "Ultra-High Modulus Polymers", Applied Science Publishers (1977), pp. 227-231.
Slusallek et al., Kolloid ZZ Polymers 251 (1973), pp. 865-870.
Slusallek et al., Angew. Makromol Chem. 53 (1976), pp. 35-51.

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