Stabilizer Composition for Halogenated Polymers

Abstract

The present invention relates to stabilizer compositions for halogenated polymers, containing perchlorates and lead compounds, to polymer compositions containing said stabilizer compositions as well as to moulded articles that can be produced by using the described stabilizer compositions or polymer compositions.

Description

EXAMPLES

The following formulations indicated as examples 1 to 10 have been prepared for screening the stabilizer compositions according to the invention. The composition of the formulations is given in the following tables:

Raw material	1	2	3	4	5	6	7	8	9	10
PVC (Vestolit P 1982K)	100	100	100	100	100	100	100	100	100	100
Titanium dioxide	4.00	4.00	4.00	4.00	4.00	4.00	4.00	4.00	4.00	4.00
Chalk	6.00	6.00	6.00	6.00	6.00	6.00	6.00	6.00	6.00	6.00
Dibasic lead phosphite	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
Dibasic lead stearate	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Neutral lead stearate	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46	0.46
Calcium stearate	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35	0.35
Distearylphthalate	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71	0.71
Polyacrylate (flowing aid)	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9
THEIC	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Sodium perchlorate on an		0.1	0.05	0.01
inert support
Sodium perchlorate on the					0.1	0.05	0.01
supporting material
Ca(OH)2
Sodium perchlorate on the								0.1	0.05	0.01
supporting material CaA-
lOH-Phosphite

The formulations obtained that way were each subjected to a test according to DIN VDE 0472 part 614 (HCl test). Thereby, a metal block thermostat of the company Liebisch was applied as testing device. Per sample, three sample units of a weight of 50±5 mg were applied as sample. The testing temperature was 200±0.5° C. The single values as well as the mean value of the stability times of the three sample units were determined as evaluation. In this context the following values were obtained.

Sample	Stability time 1	Stability time 2	Stability time 3	Mean value
No	[min]	[min]	[min]	[min]
1	66	68	68	67
2	79	80	82	80
3	80	82	83	82
4	77	78	78	78
5	82	83	83	83
6	84	84	85	84
7	80	81	81	81
8	83	84	85	84
9	80	81	81	81
10	74	75	76	75

Furthermore, the formulations according to examples 1 to 10 were subjected to a DHC test according to UEAtc (Union Européenne pour l'Agrément techique dans la construction, 1978, Secretariat General: 4, Avenue du Recteur Poincé 75782 Paris Cedex 16).

Thereby, the following stability values were obtained:

Sample identifier DHC according to UEAtc
1                 106 min
2                 212 min
3                 187 min
4                 150 min
5                 215 min
6                 195 min
7                 150 min
8                 201 min
9                 184 min
10                124 min

The results clearly show that already a minor proportion of perchlorates, in particular of perchlorates as they are applied within the scope of the present examples, exhibit a significant enhancement of the thermo stability in the particularly sensitive UEAtc test.

The testing methods for the determination of the thermo stability DHC according to DIN and DHC according to UEAtc, which are relevant for the practical experience and which are verified for quality assurance of important objects of utility, show depending on the method of measurement a significant enhancement of the stability times on a different level.

Claims

1-10. (canceled)

11. A stabilizer composition for one or more halogen-containing polymers, at least comprising: a lead compound or a mixture of two or more lead compounds; anda salt of a halogen-containing oxy acid or a mixture of two or more salts of one or more halogen-containing oxy acids,whereas the stabilizer composition comprises at least one salt of a halogen-containing oxy acid in supported form.

12. The stabilizer composition according to claim 11, wherein said one lead compound or said mixture of two or more lead compounds is present in an amount of at least 5% by weight.

13. The stabilizer composition according to claim 12, wherein said halogen-containing oxy acid or said mixture of two or more salts of one or more halogen-containing oxy acids us present in an amount of 0.005 to 0.5% by weight.

14. The stabilizer composition according to claim 13, wherein at least one salt of a halogen-containing oxy acid is present in a form, in which, based on the total content of the salt of a halogen-containing oxy acid, less than 10% of the crystallites of the salt of a halogen-containing oxy acid have a crystallite size of more than 3 μm.

15. The stabilizer composition according to claim 12, wherein at least one salt of a halogen-containing oxy acid is present in a form, in which, based on the total content of the salt of a halogen-containing oxy acid, less than 10% of the crystallites of the salt of a halogen-containing oxy acid have a crystallite size of more than 3 μm.

16. The stabilizer composition according to claim 11, wherein said halogen-containing oxy acid or said mixture of two or more salts of one or more halogen-containing oxy acids us present in an amount of 0.005 to 0.5% by weight.

17. The stabilizer composition according to claim 16, wherein at least one salt of a halogen-containing oxy acid is present in a form, in which, based on the total content of the salt of a halogen-containing oxy acid, less than 10% of the crystallites of the salt of a halogen-containing oxy acid have a crystallite size of more than 3 μm.

18. The stabilizer composition according to claim 11, wherein at least one salt of a halogen-containing oxy acid is present in a form, in which, based on the total content of the salt of a halogen-containing oxy acid, less than 10% of the crystallites of the salt of a halogen-containing oxy acid have a crystallite size of more than 3 μm.

19. The stabilizer composition according to claim 11, wherein the lead compound or a mixture of two or more lead compounds is present in an amount of at least 20% by weight.

20. The stabilizer composition according to claim 19, wherein said halogen-containing oxy acid or said mixture of two or more salts of one or more halogen-containing oxy acids us present in an amount of 0.005 to 0.5% by weight.

21. The stabilizer composition according to claim 19, wherein at least one salt of a halogen-containing oxy acid is present in a form, in which, based on the total content of the salt of a halogen-containing oxy acid, less than 10% of the crystallites of the salt of a halogen-containing oxy acid have a crystallite size of more than 3 μm.

22. The stabilizer composition according to claim 11, wherein the salt of a halogen-containing oxy acid or the mixture of two or more salts of one or more halogen-containing oxy acids is present in an amount of at least 20% by weight.

23. The stabilizer composition according to claim 11, further comprising one or more additives.

24. A process for producing a stabilizer composition, comprising mixing a lead compound or a mixture of two or more lead compounds and a salt of a halogen-containing oxy acid or a mixture of two or more salts of one or more halogen-containing oxy acids, wherein the stabilizer composition comprises at least one salt of a halogen-containing oxy acid in supported form.

25. A polymer composition, at least comprising: a halogenated polymer; anda stabilizer composition comprising a lead compound or a mixture of two or more lead compounds and a salt of a halogen-containing oxy acid or a mixture of two or more salts of one or more halogen-containing oxy acids, wherein the stabilizer composition comprises at least one salt of a halogen-containing oxy acid in supported form.

26. The polymer composition according to claim 25, wherein said one lead compound or said mixture of two or more lead compounds is present in an amount of at least 5% by weight.

27. The polymer composition according to claim 25, wherein said halogen-containing oxy acid or said mixture of two or more salts of one or more halogen-containing oxy acids us present in an amount of 0.005 to 0.5% by weight.

28. The polymer composition according to claim 25, wherein at least one salt of a halogen-containing oxy acid is present in a form, in which, based on the total content of the salt of a halogen-containing oxy acid, less than 10% of the crystallites of the salt of a halogen-containing oxy acid have a crystallite size of more than 3 μm.

29. The polymer composition according to claim 25, wherein the lead compound or a mixture of two or more lead compounds is present in an amount of at least 20% by weight.

30. A process for stabilizing one or more halogen-containing polymers, comprising mixing (a) a stabilizer composition comprising a lead compound or a mixture of two or more lead compounds and a salt of a halogen-containing oxy acid or a mixture of two or more salts of one or more halogen-containing oxy acids, wherein the stabilizer composition comprises at least one salt of a halogen-containing oxy acid in supported form with(b) a halogen-containing polymer, a mixture of two or more halogen-containing polymers, or a mixture of one or more halogen-containing polymers and one or more halogen-free polymers.