Triazine-Precondensate-Aldehyde Condensation Products and Method for Obtaining the Same

Abstract

The present invention relates to a triazine-precondensate-aldehyde condensation product obtainable by reacting a) at least one triazine compound of the general formulae (I), b) at least one aldehyde, and c) at least one triazine precondensate of the general formula (II). A method for obtaining a condensation product and a wood based panel are also disclosed.

Claims

1. A triazine-precondensate-aldehyde condensation product obtainable by reacting a) at least one triazine compound of the general formulae (I) ##STR00021## b) at least one aldehyde, and c) at least one triazine precondensate of the general formula (II) ##STR00022## wherein R.sub.1 means Q.sup.1 or a moiety of the formula R.sub.3NR.sub.4 connected with the nitrogen atom to the respective triazine ring of the structure of formula (I) or (II), R.sub.9 means Q.sup.1 or a moiety of the formula R.sub.7NR.sub.8 connected with the nitrogen atom to the triazine ring of the structure of formula (II), R.sub.2, R.sub.3, R.sub.4 and R.sub.6 mean independently from each other H, Q.sup.1 or ##STR00023## R.sub.7 and R.sub.8 mean independently from each other H, Q.sup.1, ##STR00024## R.sub.10 and R.sub.11 mean independently from each other R.sub.7 or R.sub.8; R.sub.5 means linear or branched C.sub.2-C.sub.20-alkyl that can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms R.sub.x, R.sub.y mean independently from each other H, OH, Q.sup.1, [C.sub.1-C.sub.18]OH or ##STR00025## wherein Q.sup.1 means linear or branched C.sub.1-C.sub.20-alkyl, linear or branched C.sub.2-C.sub.2O-alkenyl, linear or branched C.sub.2-C.sub.20-alkinyl, C.sub.3-C.sub.10-cycloalkyl, C.sub.5-C.sub.7-cycloalkenyl, which in each case can be interrupted by one or more oxygen atoms, sulphur atoms, substituted or non-substituted nitrogen atoms and/or by one or more groups of the type C(O)O, OC(O), C(O), NHC(O)O, OC(O)NH and/or OC(O)O; and wherein n=0-10; m=0-8; or mixtures thereof.

2. The condensation product according to claim 1, wherein Q.sup.1 is a linear or branched C.sub.1-C.sub.12-alkyl, C.sub.3-C.sub.7-cycloalkyl and linear or branched C.sub.2-C.sub.12-alkenyl.

3. The condensation product according to claim 1, wherein Q.sup.1 is a linear or branched C.sub.1-C.sub.6 alkyl.

4. The condensation product according to claim 1, wherein the moieties R.sub.2, R.sub.3, R.sub.4, R.sub.6, R.sub.7 and R.sub.8 are H or a C.sub.1-C.sub.6 alkyl comprising in one or more cases at least one OH substituent.

5. The condensation product according to claim 1, wherein the moieties R.sub.2, R.sub.3, R.sub.4, R.sub.6, R.sub.7 and R.sub.8 are in each case H and R.sub.5 is a C.sub.2-C.sub.6 alkyl.

6. The condensation product according to claim 1, wherein the at least one triazine of general formulae (I) is selected from a group comprising melamine, acetoguanamine, benzoguanamine or alkylated melamine and optionally that at least one further amino compound is added.

7. The condensation product according to claim 1, wherein the at least one aldehyde is formaldehyde.

8. The condensation product according to claim 1, wherein the molar ratio of the at least one aldehyde to the at least one triazine of general formulae (I), and the at least one precondensate of the general formulae (II) is in each case in a range between 0.4:1 and 3:1.

9. The condensation product according to claim 1, comprising an average molar mass M between 400 and 5000 g/mol.

10. The condensation product according to claim 1, comprising a storage stability between 1 and 40 days.

11. A method for obtaining a condensation product according to claim 1 comprising: providing at least one triazine of general formulae (I), adding simultaneously or separately at least one precondensate of general formula (II) and at least one aldehyde, adjusting the pH value of the reaction mixture to a range between 7 and 11, heating the reaction mixture to a temperature between 60 C. and 120 C. until a clear solution is obtained, cooling the reaction mixture until a water tolerance of the mixture of between 1 and 5 (ml/ml) is obtained.

12. The method according to claim 11, wherein the reaction is carried out in water.

13. The method according to claim 11, wherein the pH value is adjusted using an organic or inorganic base.

14. (canceled)

15. Wood based panels comprising a condensation product according to claim 1.

16. The condensation product according to claim 6, wherein the at least one further amino compound comprises urea or a derivative thereof.

17. The condensation product according to claim 1, wherein n=1-5.

18. The condensation product according to claim 1, wherein m=1-5.

19. The condensation product according to claim 3, wherein Q.sup.1 is a linear or branched C.sub.2, C.sub.3, or C.sub.4 alkyl.

20. The condensation product according to claim 9, wherein M is between 500 and 3000 g/mol.

21. The wood based panels according to claim 15, wherein the wood based panels comprise particle board, OSB, MDF, LDF, HDF, or plywood.

Description

DESCRIPTION OF THE INVENTION

[0101] Further details of the invention will be explained by the means of the following examples.

Example 1

[0102] 35 g of melamine were mixed with 4 g of melamine butanediol precondensate, 41 g of formaldehyde solution (30%) and 19, 18 g of deion. water. After addition of 4 ml 0.1 N NaOH the mixture was heated to 98 C. with a heating rate of 5 K/min. After reaching the clearing point the mixture was cooled to 93 C. with a cooling rate of 2.5 K/min. After reaching a water tolerance of 2.0 (ml/ml) the mixture was cooled to 25 C. with maximum cooling rate. The storage stability of the obtained resin was 10 days.

[0103] The water tolerance of a resin is expressed as the ratio of part of water (W1) to one part of resin (W2) or W1/W2, where the resin starts to precipitate.

Example 2

[0104] 31 g of melamine were mixed with 8 g of melamine butanediol precondensate, 41 g of formaldehyde solution (30%) and 19, 18 g of deion. water. After addition of 4 ml 0.1 N NaOH the mixture was heated to 98 C. with a heating rate of 5 K/min. After reaching the clearing point the mixture was cooled to 93 C. with a cooling rate of 2.5 K/min. After reaching a water tolerance of 2.0 (ml/ml) the mixture was cooled to 25 C. with maximum cooling rate. The storage stability of the obtained resin was 3 days.

Example 3

[0105] 27 g of melamine were mixed with 12 g of melamine butanediol precondensate, 41 g of formaldehyde solution (30%) and 19, 18 g of deion. water. After addition of 4 ml 0.1 N NaOH the mixture was heated to 98 C. with a heating rate of 5 K/min. After reaching the clearing point the mixture was cooled to 93 C. with a cooling rate of 2.5 K/min. After reaching a water tolerance of 2.0 (ml/ml) the mixture was cooled to 25 C. with maximum cooling rate. The storage stability of the obtained resin was 1 day.