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Polyester-modified polysiloxanes and their use as additives for thermoplastics, moulding compounds and coating materials

A thermoplastic, polyester modification technology, used in coatings, textiles and paper, one-component synthetic polymer rayon, etc., can solve problems such as insufficient scratch resistance

Inactive Publication Date: 2006-01-11
BYK CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although polymethylphenylsiloxanes generally have good compatibility in coating materials and also lead to enhanced flow properties of coating materials to which they are added, the scratch resistance achievable with them is insufficient

Method used

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  • Polyester-modified polysiloxanes and their use as additives for thermoplastics, moulding compounds and coating materials
  • Polyester-modified polysiloxanes and their use as additives for thermoplastics, moulding compounds and coating materials
  • Polyester-modified polysiloxanes and their use as additives for thermoplastics, moulding compounds and coating materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In a reaction vessel with a stirrer and a reflux condenser, make 406.8g (0.25mol) of polysiloxane having the following average formula

[0048]

[0049] This was mixed with 742.0 g (6.5 mol) of ε-caprolactone, and after addition of 100 ppm of dibutyltin dilaurate, the mixture was heated to 180° C. under nitrogen. After a reaction time of 6 hours, the reaction mixture was cooled to 80°C and 460.0 g of Shellsol A were added. Subsequently 73.9 g (0.25 mol) of stearyl isocyanate were added, and the mixture was stirred at 80° C. for a further 30 minutes. The solvent was removed from the reaction mixture by evacuation (40 mbar) and warming to 160°C. The product obtained was a waxy solid with a melting point of 53°C.

Embodiment 2

[0050] Embodiment 2 (not the present invention):

[0051] In a reaction vessel with a stirrer and a reflux condenser, make 507.5 g (0.25 mol) of polysiloxane having the following average formula

[0052]

[0053] This was mixed with 742.0 g (6.5 mol) of ε-caprolactone, and after addition of 100 ppm of dibutyltin dilaurate, the mixture was heated to 180° C. under nitrogen. After a reaction time of 6 hours, the reaction mixture was cooled to 80° C. and 460.0 g of She11sol A were added. Subsequently 147.8 g (0.5 mol) of stearyl isocyanate were added, and the mixture was stirred at 80° C. for a further 30 minutes. The solvent was removed from the reaction mixture by evacuation (40 mbar) and warming to 160°C. The product obtained was a waxy solid melting at 51°C.

[0054] Use case:

[0055] 0.05 g of the product from Example 1 were dissolved in 100 g of a 10% polymethylmethacrylate / ethyl acetate solution. In size 100 x 250mm 2 A 200 μm thick film was produced on a glass pl...

Embodiment 3

[0059] In a reaction vessel with a reflux condenser, 507 g (0.5 mol) of unsaturated polyester having the average formula

[0060]

[0061] and 1798g (0.45mol) of polysiloxanes having the following average formula

[0062]

[0063] and 988 g of xylene were mixed under a nitrogen atmosphere, and the mixture was heated to 100°C. Then 1.4 g of a 6% hexachloroplatinic acid / 2-propanol solution were added. After a reaction time of 3 hours, the solvent was stripped off under vacuum (40 mbar, 180° C.).

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Abstract

Polyester-modified polysiloxane compounds (I) (comprising (cyclo)aliphatic and / or aromatic polyester group with an average molecular weight of 200-4000 g / mol without zerewitinoff-hydrogen atoms), are new. Polyester-modified polysiloxane compounds of formula (I) (comprising (cyclo)aliphatic and / or aromatic polyester group with an average molecular weight of 200-4000 g / mol without zerewitinoff-hydrogen atoms), are new. A : 1-8C alkyl group; Z : 1-14C aliphatic group; R : at least 3 of -C=O-O- and / or -O-C=O- groups; Q : a group that contains no zerewitinoff-hydrogen atoms and is free of reactive carbon-carbon-multiple bond; m : 3-200; and o+n : 2 (where both o and n are not equal to zero). Independent claims are also included for: (1) thermoplastics, lacquers and molding materials comprising (I); and (2) a method for producing the process of increasing gliding capacity and scratching capacity of thermoplastics, molding materials and lacquers, comprising effectively adding (I) to the thermoplastics, molding materials and lacquers. [Image]

Description

technical field [0001] The present invention relates to polyester-modified polysiloxanes and to their use in thermoplastics, coating materials and molding compounds, as a result of which these materials are greatly improved in terms of their scratch resistance and lubricity and also in terms of their hydrophobic properties improved. Background technique [0002] From DE-C-1111320 and DE-C-1092585 it is known to add low molecular weight dimethylpolysiloxanes and methylphenylpolysiloxanes to coating materials in order to enhance their flow properties and increase their Scratch resistance and lubricity. In many cases, however, the addition of polydimethylsiloxanes leads to undesirable haze in pigment-free coating materials and also to poor flow properties, as manifested in what is known as pockmarking. If the molecular weight chosen for pure polydimethylsiloxane is too high, there will be severe defects in the coating material and it will look like pits or what are called fis...

Claims

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Application Information

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IPC IPC(8): C08G77/38C09D183/04D01F6/76C09D7/47
CPCC08L83/10C08L101/00C09D183/10D01F1/10C09D7/06C08G77/445C09D7/47C08L2666/02C08L83/00C08G77/00C08G77/14
Inventor K·豪本内斯特A·布巴特H·-W·伯格斯豪森W·格里泽尔U·诺尔特
Owner BYK CHEM GMBH
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