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Aromatic polyesters, processes for their preparation, and their use for the preparation of molecularly reinforced polymers
| Details |
Inventors: Heitz, Walter; Kampschulte, Uwe; Bottenbruch, Ludwig; Freitag, Dieter; Dicke, Hans-Rudolf;
Assignee: Bayer Aktiengesellschaft (Leverkusen, DE)
Primary Examiner: Phynes; Lucille M.
Assistant Examiner:
Attorney, Agent or Firm: Connolly & Hutz
The invention relates to new aromatic polyesters based on terephthalic acid and hydroquinones, processes for their preparation from hydroquinone and terephthalic acid derivatives, and their use for the preparation of molecularly reinforced polymers. |
|
DETAILED DESCRIPTION We claim: 1.
Polyesters of the formula (I) ##STR9## in which the radicals R.
sup.
1 and R.
sup.
4, independently of one another, represent hydrogen; an arylalkyl-, arylalkylether-, arylalkylthioether radical having 2, 3, 4, 5, 6, 7, 8, 9 or 10 carbon atoms in the alkyl chain which is unbranched and is substituted on the .
omega.
-carbon atom at the end of this chain with an unsubstituted aryl radical containing 6 to 24 carbon atoms and n represents an integer from 5 to 2000, with the proviso that one of the radicals R.
sup.
1 to R.
sup.
4 must always be other than hydrogen.
2.
Process for the preparation of polyesters of the formula (I) ##STR10## in which the radicals R.
sup.
1 and R.
sup.
4, independently of one another, represent hydrogen, an arylalkyl-, arylalkylether-, arylalkylthioether radical having 2, 3, 4, 5, 6, 7, 8, 9 or 10 carbon atoms in the alkyl chain which is unbranched and is substituted on the .
omega.
-carbon atom at the end of this chain with an unsubstituted aryl radical containing 6 to 24 carbon atoms and n represents an integer from 5 to 2000, with the proviso that one of the radicals R.
sup.
1 to R.
sup.
4 must always be other than hydrogen, characterized in that hydroquinones of the formula (VIII) ##STR11## in which the radicals R.
sup.
1 to R.
sup.
3 have the meaning stated for formula (I), (a) are reacted with terephthalic acid derivatives, such as the halides of the formula (IX) ##STR12## in which X represents halogen, such as Cl, Br, if appropriate in conventional organic solvents at temperatures from 0.
degree.
to 250.
degree.
C.
, in the presence of equivalent amounts of a tert.
-amine (relative to the terephthalic acid derivative of the formula (IX) or (b) acylated hydroquinones of the formula (VIIIb) ##STR13## in which the radicals R.
sup.
1 to R.
sup.
4 have the meaning stated for formula (I) and Ac represents C.
sub.
1 -C.
sub.
10 --CO and terephthalic acid of the formula (IXa) ##STR14## are reacted with one another, if appropriate in conventional organic solvents at temperatures from 50
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