POLYMERIZATION INHIBITOR FOR STABILIZING OLEFINICALLY UNSATURATED MONOMERS

Abstract

A polymerization inhibitor for stabilizing olefinically unsaturated monomers containing at least one compound of formula (1) and/or (2) according to the invention. Stabilized monomer compositions.

Description

Claims

1. A method for stabilizing an olefinically unsaturated monomer, comprising mixing at least one olefinically unsaturated monomer and a polymerization inhibitor composition comprising at least one compound of formulae (1) and/or (2):

2. The method to claim 1, wherein Y1 and Y2 are substituted with one or more substituents selected from alkyl, ester, ether, hydroxyl, oxo, cyano, cyanohydrin, amino, amide, carboxyl, halogen, hydantoin, ketal, acetal and urethane group.

3. The method according to claim 1, wherein the at least one olefinically unsaturated monomer is selected from the group consisting of ethene, propene, propylene, butadiene, vinyl acetate, (meth)acrylic acid, (meth)acrylate, acrylonitrile, acrolein, N-vinyl-formamide, chloroprene, isoprene, divinylbenzene, styrene, and mixtures thereof.

4. The method according to claim 1, wherein from 100 ppb (m/m) to 10 000 ppm (m/m) of at least one compound of formula (1) and/or (2) is added to the monomer, based on the olefinically unsaturated monomer.

5. The method according to claim 1, wherein from 1 ppm (m/m) to 1000 ppm (m/m) of at least one compound of formula (1) and/or (2) is added to the monomer, based on the olefinically unsaturated monomer.

6. The method according to claim 1, wherein the compound of formula (1) is a compound of the formula (3)

7. A monomer composition, comprising at least one olefinically unsaturated monomer and a polymerization inhibitor composition comprising at least one compound of formulae (1) and/or (2)

8. The method according to claim 1, wherein in the polymerization inhibitor composition the compound of formula (1) is present in an amount of 40 to 60% by weight and the compound of formula (2) is present in an amount of 60 to 40% by weight relative to the total weight of compounds of formulae (1) and (2).

9. The method according to claim 8, wherein in the polymerization inhibitor composition the compound of formula (1) is present in an amount of 45 to 55% by weight and the compound of formula (2) is present in an amount of 55 to 45% by weight relative to the total weight of compounds of formulae (1) and (2).

10. The method according to claim 1, wherein the polymerization inhibitor comprises at least one compound of formula (1).

11. The method according to claim 1, wherein the polymerization inhibitor comprises at least one compound of formula (2).

12. The monomer composition according to claim 7, wherein in the polymerization inhibitor composition the compound of formula (1) is present in an amount of 40 to 60% by weight and the compound of formula (2) is present in an amount of 60 to 40% by weight relative to the total weight of compounds of formulae (1) and (2).

13. The monomer composition according to claim 12, wherein in the polymerization inhibitor composition the compound of formula (1) is present in an amount of 45 to 55% by weight and the compound of formula (2) is present in an amount of 55 to 45% by weight relative to the total weight of compounds of formulae (1) and (2).

14. The monomer composition according to claim 7, wherein the polymerization inhibitor composition comprises at least one compound of formula (1).

15. The monomer composition according to claim 7, wherein the polymerization inhibitor composition comprises at least one compound of formula (2).

16. The monomer composition according to claim 7, wherein the compound of formula (1) is a compound of the formula (3)

17. The monomer composition according to claim 16, wherein the polymerization inhibitor composition comprises at least one compound of formula (3).

18. The monomer composition according to claim 16, wherein the polymerization inhibitor composition comprises at least one compound of formula (4).