Stabilized copolyesterether compositions suitable for outdoor applications
First Claim
1. A highly weatherable copolyesterether composition having a 264 psi heat deflection temperature greater than 60°
- C. and an inherent viscosity of about 0.8 to about 1.5, said copolyesterether comprisingA. a 100 mole % dicarboxylic acid component comprising about 80-100 mole % 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70% and about 0-20 mole % of a second acid selected from the group consisting of aliphatic dicarboxylic acids having 3 to 12 carbon atoms,B. a 100 mole % glycol component comprising about 70-95 mole % 1,4-cyclohexanedimethanol and about 5-30 mole % of a polyalkylene ether glycol having a molecular weight of about 600 to about 3000,C. a stabilizing effective amount of the combination of1. at least one hindered phenolic antioxidant,2. at least one ultraviolet light stabilizing compound compatible with said copolyesterether, and3. at least one hindered amine light stabilizing compound having the formulae ##STR4## wherein m and n are each integers of from 1 to 20, R1, R2, R3 and R4 are each independently selected from hydrogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, aryl having 6 to 22 carbon atoms, alkylene having 1 to 20 carbon atoms, cycloalkylene having 3 to 12 carbon atoms, hydroxyalkyl having 1 to 18 carbon atoms, and esters of said hydroxyalkyl; and
alkylenecarboxylic acid having 2 to 18 carbon atoms and esters, amides and metal salts of said alkylenecarboxylic acid.
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Abstract
Disclosed are stabilized polyester compositions having significantly improved weatherability. These polyesters consist of copolyesterethers derived from a dicarboxylic acid component comprising about 80-100 mole % 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70% and about 0-20 mole % of a second dicarboxylic acid and a glycol component comprising about 70-95 mole % 1,4-cyclohexanedimethanol and about 5-30 mole % of a polyalkylene ether glycol having a molecular weight of about 600 to about 3000. The copolyesterether compositions further comprise a stabilizing effective amount of the combination of (1) at least one hindered phenolic antioxidant, (2) at least one ultraviolet light stabilizing compound compatible with said copolyesterether and (3) at least one hindered amine light stabilizing compound having the formulae ##STR1## the groups shown as R1, R2, R3 and R4 are each independently selected from various substituents.
51 Citations
29 Claims
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1. A highly weatherable copolyesterether composition having a 264 psi heat deflection temperature greater than 60°
- C. and an inherent viscosity of about 0.8 to about 1.5, said copolyesterether comprising
A. a 100 mole % dicarboxylic acid component comprising about 80-100 mole % 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70% and about 0-20 mole % of a second acid selected from the group consisting of aliphatic dicarboxylic acids having 3 to 12 carbon atoms, B. a 100 mole % glycol component comprising about 70-95 mole % 1,4-cyclohexanedimethanol and about 5-30 mole % of a polyalkylene ether glycol having a molecular weight of about 600 to about 3000, C. a stabilizing effective amount of the combination of 1. at least one hindered phenolic antioxidant, 2. at least one ultraviolet light stabilizing compound compatible with said copolyesterether, and 3. at least one hindered amine light stabilizing compound having the formulae ##STR4## wherein m and n are each integers of from 1 to 20, R1, R2, R3 and R4 are each independently selected from hydrogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, aryl having 6 to 22 carbon atoms, alkylene having 1 to 20 carbon atoms, cycloalkylene having 3 to 12 carbon atoms, hydroxyalkyl having 1 to 18 carbon atoms, and esters of said hydroxyalkyl; and
alkylenecarboxylic acid having 2 to 18 carbon atoms and esters, amides and metal salts of said alkylenecarboxylic acid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 20, 23, 26)
- C. and an inherent viscosity of about 0.8 to about 1.5, said copolyesterether comprising
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9. A copolyesterether composition having a 264 psi heat deflection temperature greater than 60°
- C. and an inherent viscosity of from about 0.8 to about 1.5, said copolyesterether comprising
A. a 100 mole % dicarboxylic acid component comprising about 80-100 mole % 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70% and about 0-20 mole % of a second acid selected from the group consisting of aliphatic dicarboxylic acids having 3 to 12 carbon atoms. B. a 100 mole % glycol component comprising about 70-95 mole % 1,4-cyclohexanedimethanol and about 5-30 mole % of a polyalkylene ether glycol having a molecular weight of about 600 to about 3000, C. a stabilizing effective amount of the combination of - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 21, 22, 24, 25, 27, 28)
- C. and an inherent viscosity of from about 0.8 to about 1.5, said copolyesterether comprising
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10. at least one hindered phenolic antioxidant,at least one ultraviolet light stabilizing compound selected from the group consisting of a compound having the formula ##STR11## wherein R5, R6, and R7 are each independently selected from hydrogen, hydroxyl, branched or unbranched, substituted or unsubstituted alkyl or alkoxy radicals containing from 1 to 18 carbon atoms, aryl, and alkylenearyl containing from 7 to 22 carbon atoms;
- R7 is also chlorine or fluorine;
a compound having the formula ##STR12## wherein R8, R9 and R10 are each independently selected from hydrogen, branched or unbranched, substituted or unsubstituted alkyl having 1 to 18 carbon atoms, and alkylenecarbonyloxyalkyl having 3 to 18 carbon atoms; a compound having the formula ##STR13## wherein R11, R12 and R13 are each independently selected from hydrogen and substituted or unsubstituted, branched or unbranched alkyl radicals containing from 1 to 10 carbon atoms; a compound of the formula ##STR14## wherein R14 and R16 are each independently selected from substituted or unsubstituted alkyl containing from 1 to 18 carbon atoms, R15 is hydrogen, methyl, or substituted or unsubstituted aryl having 6 to 22 carbon atoms, and R16 is also substituted or unsubstituted alkoxy having 1 to 18 carbon atoms; a compound having the formula ##STR15## wherein R17 and R18 are each independently selected from substituted or unsubstituted, branched or unbranched alkyl having 1 to 18 carbon atoms and R19 is hydrogen or methyl; a compound having the formula ##STR16## wherein R20 is hydrogen, substituted or unsubstituted branched or unbranched alkyl or alkoxy having 1 to 18 carbon atoms,
- R7 is also chlorine or fluorine;
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11. at least one hindered amine light stabilizing compound having the formulae ##STR17## wherein m and n are each integers of from 1 to 20, R1, R2, R3 and R4 are each independently selected from hydrogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, aryl having 6 to 22 carbon atoms, alkylene having 1 to 20 carbon atoms, cycloalkylene having 3 to 12 carbon atoms, hydroxyalkyl having 1 to 18 carbon atoms, and esters of said hydroxyalkyl;
- and alkylenecarboxylic acid having 2 to 18 carbon atoms and esters, amides and metal salts of said alkylenecarboxylic acid.
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19. A copolyesterether composition having a 264 psi heat deflection temperature greater than 60°
- C. and an inherent viscosity of about 0.8 to about 1.5, said copolyesterether comprising
A. a 100 mole % dicarboxylic acid component comprising about 80-100 mole % 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70% and about 0-20 mole % of a second acid selected from the group consisting of aliphatic dicarboxylic acids having 3 to 12 carbon atoms, B. a 100 mole % glycol component comprising about 85-95 mole % 1,4-cyclohexanedimethanol having a trans isomer content of at least 60% and about 5-15 mole % of a polyalkylene ether glycol having a molecular weight of about 800 to about 1200, C. the combination of about 0.1 to about 0.5 weight % pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), about 0.5 to about 1.0 weight % 2-ethoxy-2'"'"'-ethyloxanilide, and about 0.25 to about 0.5 weight % of a polyester of succinic acid and N-β
-hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine.
- C. and an inherent viscosity of about 0.8 to about 1.5, said copolyesterether comprising
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29. The method for stabilizing a copolyesterether composition having a 264 psi heat deflection temperature greater than 60°
- C. and an inherent viscosity of about 0.8 to about 1.5, said copolyesterether comprising a 100 mole % dicarboxylic acid component comprising about 80-100 mole % 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70% and about 0-20 mole % of a second acid selected from the group consisting of aliphatic dicarboxylic acids having 3-12 carbon atoms, a 100 mole % glycol component comprising about 70-95 mole % 1,4-cyclohexanedimethanol, and about 5-30 mole % of a polyalkylene ether glycol having a molecular weight of about 600 to about 3000, said method comprising the step of incorporating into said copolyesterether composition a stabilizing effective amount of the combination of
1. at least one hindered phenolic antioxidant, 2. at least one ultraviolet light stabilizing compound compatible with said copolyesterether, and 3. at least one hindered amine light stabilizing compound having the formulae ##STR18## wherein m and n are each integers of from 1 to 20, R1, R2, R3 and R4 are each independently selected from hydrogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, aryl having 6 to 22 carbon atoms, alkylene having 1 to 20 carbon atoms, cycloalkylene having 3 to 12 carbon atoms, hydroxyalkyl having 1 to 18 carbon atoms, and esters of said hydroxyalkyl; and
alkylenecarboxylic acid having 2 to 18 carbon atoms and esters, amides and metal salts of said alkylenecarboxylic acid.
- C. and an inherent viscosity of about 0.8 to about 1.5, said copolyesterether comprising a 100 mole % dicarboxylic acid component comprising about 80-100 mole % 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70% and about 0-20 mole % of a second acid selected from the group consisting of aliphatic dicarboxylic acids having 3-12 carbon atoms, a 100 mole % glycol component comprising about 70-95 mole % 1,4-cyclohexanedimethanol, and about 5-30 mole % of a polyalkylene ether glycol having a molecular weight of about 600 to about 3000, said method comprising the step of incorporating into said copolyesterether composition a stabilizing effective amount of the combination of
Specification