Claims
- 1. An amorphous polymeric composition having an intrinsic viscosity of at least about 0.5 a notched Izod greater than 3 ft-lb/in and a glass transition temperature greater than 100.degree. C. which composition is the product of contacting monomers comprising (a) at least one aromatic dicarboxylic acid or an alkyl ester or anhydride thereof; (b) about 40 to about 90 mole percent based on moles of components (b) and (c) of at least one 2,2,4,4-tetraalkyl-1,3-cyclobutanediol having a cis:trans ratio within the range of about 33:67 to about 67:33; and (c) at least one of 1,3-propanediol and 1,4-butanediol, under polycondensation reaction conditions in the presence of a polycondensation reaction conditions in the presence of a polycondensation catalyst.
- 2. The composition of claim 1 in which component (a) is selected from the group consisting of terephthalic acid, isophthalic acid, phthalic acid, 2,6-naphthalene dicarboxylic acid, dimethyl terephthalate, diethyl terephthalate, dipropyl terephthalate, dimethyl isophthalate, diethyl isophthalate, dipropyl isophthalate, dimethyl phthalate, diethyl phthalate, dipropyl phthalate, phthalic anhydride, dimethyl 2,6-naphthalene dicarboxylate and diethyl 2,6-naphthalene dicarboxylate.
- 3. The composition of claim 1 in which the 2,2,4,4-tetraalkyl-1,3-cyclobutanediol is 2,2,4,4-tetramethyl-1,3-cyclobutanediol.
- 4. The composition of claim 3 in which the molar ratio of component (b) to component (c) is within the range of about 45:55 to about 85:15.
- 5. The composition of claim 1 in which the polycondensation catalyst is a tin compound.
- 6. The composition of claim 1 having a yellowness index value (ASTM D-1925) less than about 50.
- 7. The composition of claim 1 having a yellowness index (ASTM D-1925) less than about 20.
- 8. The composition of claim 1 in which component (a) is dimethyl terephthalate, component (b) is 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and component (c) is 1,3-propanediol.
- 9. The composition of claim 1 in which component (b) has a cis:trans isomer ratio within the range of about 40:60 to about 60:40.
- 10. The composition of claim 1 having an intrinsic viscosity (in hexafluoroisopropanol at room temperature) within the range of about 0.6 to about 1.0.
- 11. A blend of the amorphous polyester of claim 1 and at least one of poly(ethylene terephthalate) and poly(trimethylene terephthalate) .
- 12. An amorphous copolyester composition having randomly-distributed units of the structural formulas ##STR2## in which the ratio of the number of units of I to the number of units of II is within the range of about 40:60 to about 90:10 and R is 1,3-trimethylene or 1,4-tetramethylene, said composition having a notched Izod greater than 3 ft-lb/in and a glass transition temperature greater than 100.degree. C.
Parent Case Info
This is a continuation of application Ser. No. 08/455,124, filed May 31, 1995, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (4)
Number |
Date |
Country |
1456345 |
Dec 1965 |
FRX |
4165308 |
Jun 1992 |
JPX |
1044015 |
Sep 1966 |
GBX |
934102 |
Mar 1993 |
WOX |
Non-Patent Literature Citations (3)
Entry |
Jackson et al., J. Appl. Poly. Sci., 14, 685 (1970). |
Jackson et al., J. Appl. Poly. Sci., 12, 1713 (1968). |
Jackson et al., Am. Chem. Soc., Div. Org. Coatings Plast. Chem., 26, 170 (1966). |
Continuations (1)
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Number |
Date |
Country |
Parent |
455124 |
May 1995 |
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