Fungicide Mixtures

Patent metadata

Field	Value
Publication number	US-2022369639-A1
Application number	US-202017769813-A
Country	US
Kind code	A1
Filing date	Oct 13, 2020
Priority date	Oct 16, 2019
Publication date	Nov 24, 2022
Grant date	—

Abstract

The invention refers to a fungicide mixture comprising the biocides TBZ and PYM in the weight ratio of 20:1 to 1.1:1, in particular 10:1 to 1.1:1, preferably 5:1 to 1.1:1, wherein the total amount of TBZ and PYM based on the entire amount of biocidal actives is greater than 99 wt. % and its use for protecting wallboards.

First claim

1 . A fungicide mixture comprising the biocides thiabendazole (TBZ) and pyrimethanil (PYM) in the weight ratio of 20:1 to 1.1:1, wherein the total amount of TBZ and PYM based on the entire amount of biocidal actives is greater than 99 wt. %.

2 . The fungicide mixture according to claim 1 , wherein the mixture is an aqueous supension containing the biocidal actives in an amount of 1 to 60 wt.

3 . The fungicide mixture according to claim 1 , wherein the sum of biocidal active and water is 80 to 99 wt % based on the mixture.

4 . The fungicide mixture according to claim 1 ,
wherein the mixture contains the biocidal actives and water and 0.2 to 5 wt. % of at least one dispersant, 0.05 to 5 wt. % thickener, 0 to 1 wt. % defoamer,.

5 . The fungicide mixture according to claim 1 , wherein the average particle size of the biocidal actives is smaller than 100 μm.

6 . A process for the manufacturing of the fungicide mixture according to claim 1 , wherein the biocides TBZ and PYM are mixed.

7 . The process according to claim 6 , comprises the following steps:
a) mixing the biocidal actives TBZ and PYM, and at least one surfactant and water and optionally a wetting agent, a defoaming agent and an in-can preservatives, b) homogenize the mixture under a) by a high speed stirrer in a respective tank or other suitable vessel, in particular with shear forces, c) optionally further treat such homogenized mixture under b) in a bead mill and d) adding optionally a thickener before, during and/or after the milling step.

8 . A wallboard comprising a gypsum core and a facing layer, containing the biocides TBZ and PYM in the weight ratio of 20:1 to 1.1:1, wherein the total amount of TBZ and PYM based on the entire amount of biocidal actives is greater than 99 wt. %.

9 . The wallboard according to claim 8 wherein the facing layer is paper or glass fibre mat.

10 . The wallboard according to claim 8 wherein the total amount of biocidal actives in the wallboard is from 10 ppm to 3000 ppm.

11 . The wallboard according to claim 8 , wherein the biocidal actives are included in the gypsum core of the wallboard.

12 . The wallboard according to claim 8 , wherein the biocidal actives are included in or on the facing layer, which in particular is paper.

13 . The wallboard according to claim 8 , wherein the biocidal actives is contained in the gypsum core and the facing layer.

14 . A process for manufacturing the wallboard according to claim 8 wherein the wallboard is treated with a the fungicide mixture during the manufacturing process of said wallboard and/or thereafter.

15 . The process for manufacturing the wallboard according to claim 14 , wherein the fungicide mixture according to claim 1 is added during the manufacturing process:
a) to a gypsum slurry before the gypsum core is formed and/or
b) to the surface of the gypsum core of the wallboard before the facing layer, in particular the paper is applied and/or
c) to the facing layer making process, in particular the paper making process, and/or
d) to the surface of the facing layer, in particular the paper layer.

Assignees

• Lanxess Deutschland Gmbh

Inventors

• Wachtler Peter
• Uhr Hermann
• Stopp Roland

Classifications

• A01N25/34

  Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group · CPC title

• C04B2111/0062

  Gypsum-paper board like materials · CPC title

• A01P3/00

  Fungicides · CPC title

• A01N43/78 Primary

  1,3-Thiazoles; Hydrogenated 1,3-thiazoles · CPC title

• C04B28/14

  containing calcium sulfate cements {(gypsum-paper plates E04C)} · CPC title