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Humectant and dispersant, production and use thereof

A technology of reaction and addition compounds, which is applied in the field of preparation of these addition compounds, can solve the problems of inability to use, poor compatibility of dispersants, and inability to fully ensure the sufficient stabilization of granular solids to be dispersed, and achieve the effect of broad usefulness

Active Publication Date: 2011-01-12
BYK CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large amount of solvents thus introduced by these products has caused considerable problems in modern coating systems because, as part of the ongoing efforts to create environmentally compatible systems, the amount of solvents needs to be reduced as much as possible (e.g. in the case of pigment concentrates, high solids and ultra-high solids coatings), or even the complete elimination of organic solvents
Products containing polyester groups based on hydroxycarboxylic acids and / or their lactones (e.g. ε-caprolactone and δ-valerolactone) have problems with crystallization tendency, manifested by problems of poor solubility and compatibility sex
Especially in the case of decorative paints based on aromatic-free petroleum solvents, the dispersants of the prior art cannot be used at all or only to a limited extent due to poor compatibility
[0018] Taking into account the diversity of organic and inorganic pigments and filler materials currently used, stable occupancy by desorption of the surface does not sufficiently ensure adequate stabilization of the granular solid to be dispersed
Aggregation is therefore still present due to the lack of necessary effective spatial masking

Method used

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  • Humectant and dispersant, production and use thereof
  • Humectant and dispersant, production and use thereof
  • Humectant and dispersant, production and use thereof

Examples

Experimental program
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Effect test

Embodiment

[0171] For substances that do not have molecular homogeneity, the stated molecular weights—hereafter as already described above—denote the mean value of the values. In the presence of titratable hydroxyl or amino groups, molecular weight or number-average molecular weight M n . For compounds for which end group determination cannot be applied, the number average molecular weight is determined by gel permeation chromatography based on polystyrene standards.

[0172] Parts are parts by weight and percentages are percent by weight unless otherwise indicated.

[0173] According to EN ISO 9369, the free NCO content of the polyisocyanate used and the course of the NCO addition reaction were determined by reaction with butylamine and subsequent titration of excess amine. These methods are also described in "The Chemistry of Cyanates and their ThioDerivatives" by Saul Patai, Part 1, Chapter 5, 1977.

[0174] Hydroxy-functional caprolactone polyesters are prepared as described, for ...

Embodiment 1

[0176] Embodiment 1 (non-invention, comparative example)

[0177] 28.1 parts of polyisocyanate P1 were homogenized with 38.5 parts of BCPE1100 and 22.7 parts of PMA (methoxypropyl acetate). The mixture was heated to 80° C. under an inert gas, and 0.003 parts of DBTL (dibutyltin dilaurate) were added. The mixture was stirred at this temperature for about 1 hour until 65% of the NCO groups used had reacted. Then 2 parts of DMAPA were added and stirring was continued at 80 °C until all NCO groups were consumed by reaction. The product was of medium viscosity with a solids content of 60% and an amine value of 12 mg KOH / g. After several days at 20°C, the product showed a strong formation of crystals.

[0178] The product is insoluble in aromatic-free petroleum solvents.

Embodiment 2

[0180]Similar to Example 1, 38.5 parts of BPO1100 was used instead of BCPE1100. The solids content was 60% and the amine number was 12 mg KOH / g. On storage, the product remained homogeneous and liquid. No crystals are formed even during long-term storage below 0°C.

[0181] A clear 10% solution can be prepared in aromatic-free white spirit.

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Abstract

The invention relates to polypropylene oxide structures containing addition compounds and the salts thereof. The invention is characterised in that the addition compounds can be obtained by reacting (a) one or more polyisocyanates comprising at least two isocyanate groups per molecule with: (b1) one or more compounds of formula Y-XH; (b2) optionally one or more compounds of formula G-(XH)n; (c1) one or more compounds of general formula Z-Q; and (c2) optionally one or more compounds of general formula M-Q. In addition the invention relates to the production of the addition compounds and the use thereof as dispersants, humectants and dispersion stabilisers, as well as to solids that are coated with the addition compounds.

Description

technical field [0001] The present invention relates to addition compounds and their salts which are suitable as wetting and dispersing agents and as dispersion stabilizers. The invention also relates to processes for the preparation of these addition compounds, their use as wetting and dispersing agents and dispersion stabilizers for organic and inorganic pigments and fillers in organic and aqueous systems, and coatings with said wetting A powdery or fibrous solid that can be used as an agent and dispersant and can be mixed into a liquid system. Background technique [0002] In a solution or dispersion of a liquid, a wetting agent lowers the surface or interfacial tension and in this way increases the wetting ability of the solution. Dispersants are generally suitable for stabilizing particulate solids in adhesives, paints, pigment pastes, plastics and plastic mixtures, for reducing the viscosity of these systems, and for improving flow properties. Dispersion stabilizers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/28C08G18/48C09K23/00C09K23/16
CPCC08G18/4825C08G18/2875C08G18/283C08G18/4833C08G18/28C08G18/72C09D175/04C09K23/00
Inventor 沃尔夫冈·普里亲斯约尔根·奥梅斯汉斯-约瑟夫·图森
Owner BYK CHEM GMBH
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