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synergistic active composition

A technology of composition and mixture, applied in the fields of dyeing, organic chemistry, textiles and papermaking, etc., which can solve the problem of unsatisfactory reduction ability

Active Publication Date: 2022-04-05
L BRUGGEMANN GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reducing power of the combination is not entirely satisfactory

Method used

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Embodiment

[0046]The following examples illustrate the invention without limiting it. All percentage values ​​are in weight percent (wt.%).

[0047] To demonstrate the synergistic effect of the composition of the invention, a styrene-n-butyl acrylate latex (Liocryl XAS4727, obtained from Synthopol Chemie GmbH & Co. KG) was used. Styrene and n-butyl acrylate monomers were added to the latex to a final content of 5000 ppm each, and homogenized to obtain a latex emulsion with a pH of 4.5. 350 g of latex was charged into a container, and its temperature was adjusted to 65° C. using a thermostat while stirring. A mixture of the following reducing agents given in Table 1 below was prepared:

[0048] Table 1

[0049]

[0050]

[0051] RM: reducing agent mixture

[0052] TP 1328: 2-Hydroxy-2-sulfinatoacetic acid sodium salt containing 55% of 2-hydroxy-2-sulfinatoacetic acid sodium salt

[0053] Each of these mixtures was added in a separate experiment to the latex at 65°C and pH 4.5 i...

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Abstract

The present invention relates to a synergistically active composition comprising a mixture of sulfinic acid or a salt thereof and ascorbic acid or a salt thereof and the use of the composition as reducing agent. The reducing power of the composition of the present invention is significantly higher than that of the individual components.

Description

technical field [0001] The present invention relates to a synergistically active composition comprising a mixture of sulfinic acid or a salt thereof and ascorbic acid or a salt thereof and the use of the composition as reducing agent. Background technique [0002] Formaldehyde sulfoxylate (hydroxymethanesulfinate), especially sodium formaldehyde sulfoxylate, has proven to be an effective and valuable reducing agent, especially in free radical initiated emulsion polymerization. However, formaldehyde sulfoxylate emits toxic formaldehyde during the reduction process. Plastic or polymer dispersions containing formaldehyde cannot be polymerized using alternative reducing agents such as bisulfite, ascorbic acid, isoascorbic acid or sodium erythrobate. Since these formaldehyde-free reducing agents are weaker reducing agents, the disadvantage of less complete polymerization compared to formaldehyde sulfoxylate must be accepted. Furthermore, increased condensate formation or yellow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/40C08F6/00C07C313/04D06P1/62D06P1/22
CPCC07C313/04C08F4/40C08F6/006D06P1/221D06P1/62D06L4/30D06P5/155C08L25/14C08L33/08C08F2/22C08K5/1535C08K5/41
Inventor 约瑟夫·伯格霍夫斯特凡·马克斯特凡尼·恩德尔
Owner L BRUGGEMANN GMBH & CO KG
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