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1. WO2020163424 - COMPOSITIONS DE RÉDUCTION DU VOILE POUR REVÊTEMENTS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

We claim:

1. A composition comprising:

(a) a polyester comprising residues of:

(i) terephthalic acid and isophthalic acid; and

(ii) a blend of at least two glycols;

wherein the amount of terephthalic acid is 15 mole percent to 20 mole percent and the amount of isophthalic acid is 80 to 85 mole percent wherein the total amount of terephthalic acid and isophthalic acid in the resin equals 100 mole percent; and

(b) a non-aqueous solvent;

wherein the composition remains clear at a temperature of 20-30 °C for at least 120 days.

2. The composition of claim 1 wherein said glycol blend is selected from

2.2.4.4-tetramethyl-1 ,3-cyclobutanediol, 1 ,4-cyclohexane dimethanol, 1 ,3-cyclohexane dimethanol, neopentyl glycol, ethylene glycol, 2-methyl 1 ,3-propane diol, 1 ,6-hexanediol, trimethylol propane.

3. The composition of claim 1 wherein said glycol blend is selected from

2.2.4.4-tetramethyl-1 ,3-cyclobutanediol combined with at least one of 1 ,4-cyclohexane dimethanol, 1 ,3-cyclohexane dimethanol, neopentyl glycol, ethylene glycol, 2-methyl 1 ,3-propane diol, 1 ,6-hexanediol, trimethylol propane.

4. A polyester for use in metal food packaging applications comprising residues of:

(a) 80 to 85 mole percent isophthalic acid and 20 to 15 mole

percent terephthalic acid wherein the total amount of

terephthalic acid and isophthalic acid in the resin equals 100 mole percent; and

(b) a blend of at least two glycols selected from 2, 2,4,4- tetramethyl-1 ,3-cyclobutanediol,1 ,4-cyclohexane dimethanol, 1 ,3-cyclohexane dimethanol, neopentyl glycol, ethylene glycol, 2-methyl 1 ,3-propane diol, 1 ,6-hexanediol, trimethylol propane.

5. The polyester of claim 4 wherein said glycol blend is selected from 2,2,4,4-tetramethyl-1 ,3-cyclobutanediol combined with at least one of 1 ,4-cyclohexane dimethanol, 1 ,3-cyclohexane dimethanol, neopentyl glycol, ethylene glycol, 2-methyl 1 ,3-propane diol, 1 ,6-hexanediol, trimethylol propane.

6. A solvent borne coating composition for use in metal food packaging applications comprising:

A. a polyester resin comprising the residues of:

(a) 80 to 85 mole percent isophthalic acid and 20 to 15 mole percent terephthalic acid based on the total amount of isophthalic acid and terephthalic acid in the resin; and

(b) a blend of at least two glycols selected from 2, 2,4,4- tetramethyl-1 ,3-cyclobutanediol, 1 ,4-cyclohexane dimethanol, 1 ,3-cyclohexane dimethanol, neopentyl glycol, ethylene glycol, 2-methyl 1 ,3-propane diol, 1 ,6- hexanediol, trimethylol propane;

B. a non-aqueous solvent;

C. a crosslinker; and

D. optionally a catalyst.

7. The solvent borne coating composition of claim 6 wherein said crosslinker is an isocyanate composition, a phenolic composition, an amino composition or a mixture thereof.

8. The solvent borne coating composition of claim 6 wherein said isocyanate composition is isophorone diisocyanate.

9. The solvent borne coating composition of claim 6 wherein said phenolic compositions is cresol or a phenolic resin.

10. The solvent borne coating composition of claim 6 wherein said amino composition is melamine or benzoguamine.

1 1. The solvent borne coating composition of claim 6 wherein said glycol blend is selected from 2,2,4,4-tetramethyl-1 ,3-cyclobutanediol combined with at least one of 1 ,4-cyclohexane dimethanol, 1 ,3-cyclohexane dimethanol, neopentyl glycol, ethylene glycol, 2-methyl 1 ,3-propane diol, 1 ,6-hexanediol, trimethylol propane.

12. A composition comprising:

A. a polyester comprising residues of:

(a) terephthalic acid and isophthalic acid; and

(b) a blend of at least two glycols;

wherein the ratio of terephthalic acid to isophthalic acid is about 20 mole percent terephthalic acid to 80 mole percent isophthalic acid, to about 15 mole percent terephthalic acid to 85 mole percent isophthalic acid based on the total amount of terephthalic acid and isophthalic acid in the resin;

wherein said glycol blend is selected from 2,2,4,4-tetramethyl-1 ,3-cyclobutanediol, 1 ,4-cyclohexane dimethanol, 1 ,3-cyclohexane dimethanol, neopentyl glycol, ethylene glycol, 2-methyl 1 ,3-propane diol, 1 ,6-hexanediol, trimethylol propane; and

B. a solvent selected from the group consisting of benzene,

xylene, mineral spirits, naphtha, toluene, acetone, methyl ethyl ketone, methyl n-amyl ketone, methyl isoamyl ketone, n-butyl

acetate, isobutyl acetate, t-butyl acetate, n-propyl acetate, isopropyl acetate, ethyl acetate, methyl acetate, ethanol, n- propanol, isopropanol, n-butanol, sec-butanol, isobutanol, benzyl alcohol, cyclohexanone, ethylene glycol monobutyl ether, propylene glycol n-butyl ether, propylene glycol methyl ether, propylene glycol monopropyl ether, dipropylene glycol methyl ether, diethylene glycol monobutyl ether, trimethylpentanediol mono-isobutyrate, ethylene glycol mono octyl ether, diacetone alcohol, 2,2,4-trimethyl-1 ,3-pentanediol monoisobutyrate, C9-10 dialkyl and trialkylbenzenes, C10 aromatics, C10-13 aromatics or combinations thereof;

wherein the polyester remains clear upon visual observation after storage at a temperature of 20-30 °C for at least 120 days.

13. The composition of claim 1 wherein said non-aqueous solvent is selected from the group consisting ofbenzene, xylene, mineral spirits, naphtha, toluene, acetone, methyl ethyl ketone, methyl n-amyl ketone, methyl isoamyl ketone, n-butyl acetate, isobutyl acetate, t-butyl acetate, n-propyl acetate, isopropyl acetate, ethyl acetate, methyl acetate, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, isobutanol, benzyl alcohol,

cyclohexanone, ethylene glycol monobutyl ether, propylene glycol n-butyl ether, propylene glycol methyl ether, propylene glycol monopropyl ether, dipropylene glycol methyl ether, diethylene glycol monobutyl ether,

trimethylpentanediol mono-isobutyrate, ethylene glycol mono-octyl ether, diacetone alcohol, 2,2,4-trimethyl-1 ,3-pentanediol monoisobutyrate, C9-10 dialkyl and trialkylbenzenes, C10 aromatics, C10-13 aromatics or combinations thereof.

14. A composition that will remain clear after storage at a temperature of 20-30 °C for at least 120 days, said composition comprising:

A. a polyester comprising residues of:

(a) terephthalic acid and isophthalic acid; and

(b) a blend of at least two glycols;

wherein the amount of terephthalic acid is 15 mole percent to 20 mole percent and the amount of isophthalic acid is 80 to 85 mole percent wherein the total amount of terephthalic acid and isophthalic acid in the resin equals 100 mole percent;

wherein said glycol blend is selected from 2,2,4,4-tetramethyl-1 ,3-cyclobutanediol, 1 ,4-cyclohexane dimethanol, 1 ,3-cyclohexane dimethanol, neopentyl glycol, ethylene glycol, 2-methyl 1 ,3-propane diol, 1 ,6-hexanediol, trimethylol propane; and

B. a solvent selected from the group consisting of benzene,

xylene, mineral spirits, naphtha, toluene, acetone, methyl ethyl ketone, methyl n-amyl ketone, methyl isoamyl ketone, n-butyl acetate, isobutyl acetate, t-butyl acetate, n-propyl acetate, isopropyl acetate, ethyl acetate, methyl acetate, ethanol, n- propanol, isopropanol, n-butanol, sec-butanol, isobutanol, benzyl alcohol, cyclohexanone, ethylene glycol monobutyl ether, propylene glycol n-butyl ether, propylene glycol methyl ether, propylene glycol monopropyl ether, dipropylene glycol methyl ether, diethylene glycol monobutyl ether, trimethylpentanediol mono-isobutyrate, ethylene glycol mono octyl ether, diacetone alcohol, 2,2,4-trimethyl-1 ,3-pentanediol monoisobutyrate, C9-10 dialkyl and trialkylbenzenes, C10 aromatics, C10-13 aromatics or combinations thereof.