Addition compositions suitable as dispersants and dispersion stabilizers

A technology of addition compounds and compounds, applied in chemical/physical processes, transportation and packaging, chemical instruments and methods, etc., can solve problems such as insufficient guarantee of solid stabilization of dispersed particles, lack of space shielding, etc.

Active Publication Date: 2005-11-09
BYK CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Owing to the variety of organic and inorganic pigments and filler materials used today, a sufficient stabilization of the dispersed particle solids cannot be sufficiently ensured by means of surface desorption-stabilizing occupancy
Agglomeration may therefore occur due to lack of effective steric shielding necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0127] In the following the invention will be illustrated by way of examples. In the case of substances without molecular homogeneity, the molecular weights stated below represent the mean values ​​of the number averages (which otherwise apply to the entire specification unless otherwise stated). The molecular weight, as well as the number average molecular weight Mn, can be determined by standard methods, for example by determining the OH number or amine number, using the freezing point depression method, or by gel permeation chromatography. Parts are parts by weight and percentages are percentages by weight unless otherwise noted. The free NCO content of the polyisocyanates used and the course of the NCO addition reaction were determined according to EN ISO 9369 by reaction with butylamine and subsequent titration of the excess amine. These methods are also described in Saul Patai, "The Chemistry of Cyanates and their Thioderivates", Part 1, Chapter 5, 1977.

[0128] Hydro...

preparation Embodiment 1

[0162] a) Add 4.2 parts of polyvinylamine, Mn about 2000 (eg Epomin SP018, Nippon Shokubai) into a reaction vessel with reflux condenser and stirrer, and heat the initial charge to 90°C. Once this temperature has been reached, 43.8 parts of uretdione-comprising precursor intermediate I1 are added. The reaction may be somewhat exothermic, but cooling is not required; the energy released is used to accelerate the reaction. At a defined temperature, the reaction mixture is stirred until the uretdione addition reaction is substantially complete. The reaction can be controlled according to the number of amines: approximately 27% of the amino groups present are reacted.

[0163] b) When the amine number has dropped to 63% of the original number, react the other 25% of the original amino groups by adding 2 parts of ethylhexyl glycidyl ether and stir for about one hour more while maintaining the temperature until the ring The oxygen groups have substantially reacted. The progress o...

preparation Embodiment 37

[0194] For the purpose of salt formation, to 100 g of the adduct prepared according to Example 4, 16.9 g of tall oil fatty acid (acid value: 195 mgKOH / g) was added, and the mixture was stirred at 50° C. for 20 minutes. The resulting salt had an acid value of 28 mgKOH / g and an amine value of 28 mgKOH / g.

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Abstract

The invention relates to addition compounds which are obtainable by reacting a) one or more polyisocyanates containing uretdione groups with b) one or more compounds of the formula (I) where XH and Y is are defined in the specification, with the proviso that substantially all free isocyanate groups of component a) are reacted with the compounds of the formula (I) to give an intermediate which contains uretdione groups, and subsequently the uretdione groups are reacted with c) one or more compounds of the general formula (II) in which R and Z are given the meanings in the specification, if desired, after this reaction, reacting any reactive amino groups still present in the reaction - 56 - product with compounds that are reactive towards amino groups; and also salts or quaternization products of the addition compounds. The invention further relates to a process for preparing the addition compounds and to their use, particularly as dispersion stabilizers and dispersants.

Description

technical field [0001] The invention relates to addition compounds suitable as dispersants and suitable as dispersion stabilizers and to the salts of said compounds. The invention also relates to processes for the preparation of these addition compounds, their use as dispersants and dispersion stabilizers for organic and inorganic pigments and fillers in organic and aqueous systems, as well as to coatings with such dispersants and intended for the introduction of Powder or fibrous solids in liquid systems. Background technique [0002] Dispersants are generally suitable for stabilizing particulate solids in adhesives, paints, pigment pastes, plastics and plastic blends, for reducing the viscosity of such systems, and for improving flow properties. [0003] In order to be able to incorporate solids into liquid media, high mechanical forces are necessary. Dispersants are generally used in order to reduce the dispersing forces and minimize the total energy input into the syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K23/52C08G18/28C08G18/32C08G18/42C08G18/48C08G18/50C08G18/64C08G18/79C08G18/83C09B67/20C09D17/00C09D175/04C09K23/00C09K23/54
CPCC08G18/2825C08G18/4277C08G18/6423C08G18/798C09D17/002C08G18/284B01F17/005B01F17/0042B01F17/0057B01F17/0071C08G18/283C08G18/2027C09K23/54C09K23/00C09K23/16C08G18/70C08G18/09C08G18/78C08G18/77C08J3/126
Inventor W·普里斯钦斯U·克拉佩K·豪本内斯特A·埃斯塞
Owner BYK CHEM GMBH
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