Powder coating suspensions (powder slurries) and powder coatings, process for producing them and their use

A powder coating and suspension technology, which is used in the preparation of new powder coating suspensions and powder coatings, adhesive layers, sealing layers, and the preparation of coatings. Problems such as unsatisfactory leveling of powder slurries and powder coatings to achieve high light stability, significant processability, high shear stability

Inactive Publication Date: 2009-02-25
BASF AG
View PDF15 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the shear stability of this known powder slurry for ESTA applications still needs to be improved
[0015] Furthermore, the known powder slurries and powder coatings sometimes exhibit unsatisfactory leveling, which reduces their very good overall properties

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0149] The preparation of this liquid component (B) has no special characteristics as far as its method is concerned, but uses customary and known techniques and devices for the preparation of melts, especially polymer melts, such as extruders, stirred tanks , Taylor reactor, tubular reactor, loop reactor, etc.

[0150] The process temperature is chosen so that the decomposition temperature of the starting product or most easily decomposed components is not exceeded. Preference is given to using process temperatures of 50-250°C, preferably 60-220°C, particularly preferably 70-200°C, very particularly preferably 80-190°C, and especially 90-180°C.

[0151] In the process of the invention, the liquid component(s) (B) are then fed to a suitable mixing unit where they are emulsified in the aqueous medium (C). The aqueous medium (C) preferably comprises the abovementioned emulsifiers (A) for the use according to the invention.

[0152] In a further variant of the process according...

preparation example 1

[0221] Preparation of emulsifier (A1)

[0222] A suitable reaction vessel equipped with three feed conduits, stirrer, reflux condenser and oil heating was charged with 1839.5 parts by weight of deionized water and the initial charge was heated to 90°C. Then, at this temperature, three separate feed streams were metered into this initial charge in parallel and at a uniform rate. The first feed stream consists of 403.5 parts by weight of methyl methacrylate, 178.2 parts by weight of acrylic acid, 13.4 parts by weight of isobutyl methacrylate, 224.7 parts by weight of n-butyl methacrylate, 165.4 parts by weight of methyl It consists of hydroxyethyl acrylate and 65.7 parts by weight of 1,1-diphenylethylene. The second feed stream consisted of 173.5 parts by weight of a 25% strength by weight aqueous ammonia solution. The third feed stream consisted of a solution of 78.9 parts by weight ammonium persulfate in 183.8 parts by weight deionized water. The first and second feed strea...

preparation example 2

[0224] Preparation of emulsifier (A2)

[0225] Preparation Example 1 was repeated except that 65.7 parts by weight of 1,1-diphenylethylene was replaced by using 65.7 parts by weight of γ-terpinene. The resulting dispersion of emulsifier (A2) had a solids content of 34.5% by weight (1 hour / 130° C.), a surface tension of 36.2 mN / m, a calculated acid value of 132 mg KOH / g resin solids, and a calculated hydroxyl value of It is 68mg KOH / g resin solid.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
hydroxyl valueaaaaaaaaaa
surface tensionaaaaaaaaaa
Login to view more

Abstract

Powder slurries and powder coatings which can be produced in the presence of an emulsifier (A), wherein (1) a liquid component (B) containing a liquid or liquefied constituent of a powder slurry or a powder coating is emulsified in an aqueous medium (C) to give an aqueous emulsion of liquid particles (D), (2) the emulsion is allowed to cool so that a suspension of dimensionally stable particles (D), i.e. the powder slurry, is formed and (3) the dimensionally stable particles (D), i.e. the powder coating, are isolated, with the emulsifier (A) having a hydroxyl number of from 50 to 250 mg KOH / g and being able to be prepared by free-radical copolymerization in an aqueous medium of (a1) hydroxyl-containing, olefinically unsaturated monomers and (a2) olefinically unsaturated monomers selected from the group consisting of (a21) monomers of the general formula (I): R<1>R<2>C=CR<3>R<4>, where at least two of the variables are substituted or unsubstituted aryl, arylalkyl or arylcycloalkyl radicals; (a22) olefinically unsaturated terpene hydrocarbons; and (a23) dimeric alpha-alkylvinylaromatics; a process for producing them and their use.

Description

technical field [0001] The present invention relates to novel powder coating suspensions (powder slurries) and powder coatings which can be prepared by emulsification. The invention also relates to a process for the preparation of novel powder coating suspensions (powder slurries) and powder coatings by emulsification. The invention also relates to the use of the novel powder coating suspensions (powder slurries) and powder coatings as coating, adhesive and sealing compositions or for the preparation of these compositions, and to the coating, adhesive and sealing compositions For the preparation of coatings, adhesive layers, sealing layers. Background technique [0002] From German patent application DE 101 26 651 A1, powder slurries and powder coatings are known which can be prepared as follows [0003] (1) emulsifying at least one liquid component (B) comprising at least one liquid or liquefied component of a powder slurry or powder coating in an aqueous medium (C) in th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/00C09D5/00C09D7/45C09K23/00
CPCC09D5/027C09D5/033C09D7/02C09D7/45C09D5/03
Inventor C·阿尔佩特H-P·林克W-A·容E·韦斯林M·奥伯霍夫T·丹纳A·鲍德尔
Owner BASF AG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap