Paint composition with anti-adhesive and anti-pollution property and polymer moulding plastics

A composition and molding compound technology, applied in antifouling/underwater coatings, coatings, biocide-containing paints, etc., can solve the problems that the anti-sticking properties of other compositions cannot be generally improved

Inactive Publication Date: 2002-04-24
BYK CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this composition has the disadvantage that the branched polymer is used as the sole adhesive component and reacts with the crosslinker via OH gro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In a four-neck flask equipped with a stirrer, thermometer, dropping funnel, distillation unit and nitrogen inlet tube, put 10 g of polydimethylsiloxane with terminal methacrylic acid groups and a weight average molecular weight of 5000 Macromonomer, and 100 g of methoxypropyl acetate, these ingredients were thoroughly mixed. Nitrogen was passed through the mixture throughout the reaction. Raise the reaction temperature to 122°C, add 2g of methacrylic acid, 42.7g of isobutyl methacrylate, 26.0g of hydroxypropyl methacrylate, 29.3g of styrene and 1.5g of Trigonox C (tert-butyl peroxybenzoate Base ester, Akzo Nobel, NL-Amersfoort), was metered into it over the course of 4 hours. Immediately after the end of the metering step, 0.25 g of Trigonox C were added. After a further 30 and 60 minutes of reaction, 0.25 g of Trigonox C was added. The batch was then maintained at 122°C for 1 more hour. This batch is clear and viscous. The hydroxyl value of the polymer solution wa...

Embodiment 2

[0051] In a four-neck flask equipped with a stirrer, thermometer, dropping funnel, distillation unit and nitrogen gas inlet pipe, put 10 g of polydimethylsiloxane with a terminal methacrylic acid group and a weight average molecular weight of 20000 Macromonomer, and 100 g of methoxypropyl acetate, these ingredients were thoroughly mixed. Nitrogen was passed through the mixture throughout the reaction. Raise the reaction temperature to 122°C, add 2g methacrylic acid, 14.5g caprolactone-modified hydroxyethyl acrylate (Tone M-100, Union Carbide, average molecular weight is 344), 12g n-butyl methacrylate, A mixture of 19.5 g of hydroxypropyl methacrylate, 22.8 g of styrene, 19.2 g of methyl methacrylate and 1.5 g of Trigonox C (tert-butyl peroxybenzoate, Akzo Nobel, NL-Amersfoort), in Metering was added over the course of 3 hours. Immediately after the end of the metering step, 0.25 g of Trigonox C were added. After a further 30 and 60 minutes of reaction, 0.25 g of Trigonox C ...

Embodiment 3

[0053] In a four-neck flask equipped with a stirrer, thermometer, dropping funnel, and nitrogen inlet tube, 34.5 g of a copolymer of styrene and maleic anhydride (SMA2000, Atofina, with an average molecular weight of 2500, styrene / maleic anhydride Anhydride ratio of 2:1) was dissolved in 50.6 g of methoxypropyl acetate, and the solution was heated to 120°C. In the course of 5 minutes, 3.75 g of a single-end hydroxyl-functionally modified polydimethylsiloxane with a weight-average molecular weight of 1000 were metered into it. After 30 minutes, 12.6 g of 2-ethylhexanol were metered in over the course of 5 minutes. The reaction mixture was then maintained at 120°C for 2 hours and at 50°C for 1 hour. This gives a clear product with a solids content of about 50%. According to the results of IR spectroscopic analysis, the presence of acid anhydride was not observed. The polymer has an average molecular weight of about 3800. NMR spectroscopic studies indicated the presence of th...

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Abstract

The invention relates to coating compositions having anti-adhesion and dirt repellency properties, these compositions being admixed as additive with from 0.1 to 10% by weight, based on the solids content of the coating composition, of a branched polymer which possesses a weight-average molecular weight of from 2000 to 200,000 and comprises a polymeric base molecule and also polydiorganosiloxane side chains which are bonded covalently to the base molecule via Si-C bonds, have a weight-average molecular weight of between 1000 and 30,000, and whose fraction of the total weight of the branched polymer is from 5 to 25% by weight. The present invention further relates to polymeric moulding compounds having anti-adhesion and dirt repellency properties, to which this branched polymer is added as additive in an amount of from 0.1 to 10% by weight, based on the total weight of the polymeric moulding compounds. The invention additionally relates to the use of the branched polymers as additives for coating compositions and polymeric moulding compounds.

Description

technical field [0001] The present invention relates to coating compositions and polymeric molding compounds having anti-stick and stain resistance properties, and to the use of branched polymers as additives in coating compositions and polymeric molding compounds. Background technique [0002] It is known to add polysiloxanes to coatings and polymeric molding compounds in order to obtain comparable qualities, for example, to increase the mar resistance of furniture varnishes and vehicle coatings, or the anti-stick properties of paper coatings. The applications of polysiloxanes are wide and varied. [0003] DE-A-3535283 describes polysiloxanes containing polyester groups for paints and molding compounds which provide them with anti-adhesive properties. However, to obtain full effect, very high addition concentrations are required, as such, other coating properties may be adversely affected. [0004] EP-A-0835897 describes silicone poly(meth)acrylates, which are prepared fr...

Claims

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Application Information

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IPC IPC(8): C08J5/00C08G77/42C08G77/442C08G77/445C08G77/458C09D5/16C09D183/04C09D183/10C09D201/00
CPCC08G77/42C08G77/442C08G77/458C08G77/445C09D183/10
Inventor K·豪本尼斯特A·布巴特A·弗兰克A·伍克U·克拉佩
Owner BYK CHEM GMBH
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