Mixed-terminated polyester plasticizers
First Claim
1. A mixed-terminated polyester plasticizer characterized by having improved low temperature properties and having an average molecular weight between 500 and 5000, an acid value less than 10, hydroxyl value less than 20 and corresponding to the formula ##STR3## wherein R is a bivalent hydrocarbon radical containing from 2 to 6 carbon atoms, R1 is a bivalent hydrocarbon radical containing from 2 to 10 carbon atoms, T'"'"' is an acyl radical containing 4 to 18 carbon atoms, T" is an alkyl radical containing from 4 to 18 carbon atoms, n is a positive integer from 1 to 9 and consisting essentially of the reaction product of 2 to 10 moles of (a) an aliphatic glycol containing 2 to 6 carbon atoms, with an equimolar amount of (b) an aliphatic dibasic acid containing 4 to 12 carbon atoms or a mixture of C4 -C12 aliphatic dibasic acid and aromatic dibasic acid or anhydride thereof, and terminated with (c) a mixture of an aliphatic monobasic acid containing 4 to 18 carbon atoms and an aliphatic monofunctional alcohol containing 4 to 18 carbon atoms, the molar ratio of said monobasic and monofunctional alcohol in the mixture ranging between 0.5:
- 1.5 and 1.5;
0.5.
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Accused Products
Abstract
Polyester plasticizers having improved low temperature properties are obtained by terminating the polyester with mixed chain-terminating agents. Mixtures of monobasic acids and monofunctional alcohols are employed for this purpose. The polyesters of this invention find particular utility as plasticizers for PVC homopolymers and copolymers.
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Citations
9 Claims
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1. A mixed-terminated polyester plasticizer characterized by having improved low temperature properties and having an average molecular weight between 500 and 5000, an acid value less than 10, hydroxyl value less than 20 and corresponding to the formula ##STR3## wherein R is a bivalent hydrocarbon radical containing from 2 to 6 carbon atoms, R1 is a bivalent hydrocarbon radical containing from 2 to 10 carbon atoms, T'"'"' is an acyl radical containing 4 to 18 carbon atoms, T" is an alkyl radical containing from 4 to 18 carbon atoms, n is a positive integer from 1 to 9 and consisting essentially of the reaction product of 2 to 10 moles of (a) an aliphatic glycol containing 2 to 6 carbon atoms, with an equimolar amount of (b) an aliphatic dibasic acid containing 4 to 12 carbon atoms or a mixture of C4 -C12 aliphatic dibasic acid and aromatic dibasic acid or anhydride thereof, and terminated with (c) a mixture of an aliphatic monobasic acid containing 4 to 18 carbon atoms and an aliphatic monofunctional alcohol containing 4 to 18 carbon atoms, the molar ratio of said monobasic and monofunctional alcohol in the mixture ranging between 0.5:
- 1.5 and 1.5;
0.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 1.5 and 1.5;
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9. A plasticized vinyl resin composition comprising a polyvinyl chloride homopolymer or copolymer and 10 to 110 parts, per 100 parts resin, of a mixed-terminal polyester plasticizer corresponding essentially to the formula ##STR4## wherein R is a bivalent hydrocarbon radical containing from 2 to 6 carbon atoms, R1 is a bivalent hydrocarbon radical containing from 2 to 10 carbon atoms, T'"'"' is an acyl radical containing 4 to 18 carbon atoms, T" is an alkyl radical having from 4 to 18 carbon atoms, n is a positive integer from 1 to 9 and consisting essentially of the reaction product of 2 to 10 moles of (a) an aliphatic glycol containing 2 to 6 carbon atoms, with an equimolar amount of (b) an aliphatic dibasic acid containing 4 to 12 carbon atoms or a mixture of C4 -C12 aliphatic dibasic acid and aromatic dibasic acid or anhydride thereof, and terminated with (c) a mixture of an aliphatic monobasic acid containing 4 to 18 carbon atoms and an aliphatic monofunctional alcohol containing 4 to 18 carbon atoms, the molar ratio of said monobasic acid and monofunctional alcohol in the mixture ranging between 0.5:
- 1.5 and 1.5;
0.5.
- 1.5 and 1.5;
Specification