Oligourea Compounds and Method for Producing Same and Use Thereof
OwnerWerner Klockemanninventor
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Abstract
The invention relates to a method for producing oligourea compounds by chain building and depolymerization, and to oligourea dispersions, as well as to their use as fungicides, biocides and/or herbicides.
Claims21
Method for the production of oligomeric urea compounds by reaction of starting compounds each with at least two reactive groups, chosen from the hydroxy and/or thiol group, with di- or polyisocyanates
- at a first reaction temperature, in order to construct polyurethane and/or polythiourethane compounds (chain construction),
- and subsequent depolymerization of the resulting polyurethane and/or polythiourethane compounds in the presence of a primary or secondary diamine or polyamine at a second reaction temperature, wherein the second reaction temperature, in regard to the maximum of the respective temperature, is at least 40° C. higher than the first reaction temperature, in order to obtain compositions having oligomeric urea compounds and the starting compounds with at least two reactive groups, chosen from the hydroxy and/or thiol group.
Method according to at least one of the preceding claims, wherein the polyurethane and/or polythiourethane compounds are constantly present as liquid, dispersed in liquid, or in dissolved form under the conditions of the reaction.
Method according to at least one of the preceding claims, wherein a dispersant is added at least during the depolymerization.
Method according to at least one of the preceding claims, wherein chain build-up and depolymerization are carried out in a single reactor during the reaction.
Method according to at least one of the preceding claims, wherein the reaction of chain build-up is carried out at 20 and 120° C. (first reaction temperature) and the depolymerization at greater than 120, preferably greater than 150° C. to 250° C. (second reaction temperature).
Method according to at least one of the preceding claims, wherein the oligomeric urea compounds are reacted with one or more reactive groups of fungicide, biocide or herbicide compounds.
Method according to at least one of the preceding claims, wherein the primary and/or secondary diamines or polyamines are at least partly fungicide, biocide or herbicide compounds.
Method according to at least one of the preceding claims, wherein the second reaction temperature is at least 70° C., especially at least 100° C. higher than the first reaction temperature.
Method according to at least one of the preceding claims, wherein the oligourea molecules are present at least partly in particle form and dispersed.
Method according to at least one of the preceding claims, wherein the primary or secondary diamines or polyamines, mono-amines, water, urea and/or ammonia are added after formation of the polyurethane and/or polythiourethane compounds and before or during the temperature rise to the second reaction temperature, preferably before the temperature rise to the second reaction temperature.
Oligourea dispersions, containing a dispersant and oligourea molecules with 2 to 16, preferably 2 to 8 monomer units, especially on average (excepting monomers) with 2 to 16, preferably on average 2 to 8, monomer units, wherein in particular more than 50%, especially more than 80%, of all oligourea molecules (excepting the monomers) have oligomerization degrees of 2 to 16, especially 2 to 8.
Dependencies are inferred from the claim text.