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Method for preventing fogging when coating a flexible support with a crosslinkable liquid silicone composition in a roll apparatus

A silicone coating, silicone technology, applied in the direction of no pigment coating, coating liquid on the surface, coating, etc., can solve the problem of not providing quantitative elements, etc., and achieve the effect of improving hygiene and safety conditions

Active Publication Date: 2021-04-20
ELKEM SILICONES FRANCE SAS +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the latter point, the patent US 6 057 033 does not provide any quantitative factors for evaluating the reduction of fogging brought about by cellulose fibers

Method used

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  • Method for preventing fogging when coating a flexible support with a crosslinkable liquid silicone composition in a roll apparatus
  • Method for preventing fogging when coating a flexible support with a crosslinkable liquid silicone composition in a roll apparatus
  • Method for preventing fogging when coating a flexible support with a crosslinkable liquid silicone composition in a roll apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0291] Example 1 - Preparation of anti-fogging additive E1 according to the present invention:

[0292] In a 25 mL single-necked flask, 10.0 g of PDMS (5) and 0.039 g of acrylic acid were mixed, which resulted in a molar ratio r = 0.63 and a molar ratio J = 1.26. The reaction mixture was kept under magnetic stirring at a temperature of 50 °C for 7 days. No post-reaction treatment was applied. in CDCl 3 of the product obtained at 27 °C 1 H NMR analysis (128 scans) showed that the acrylic functional group had disappeared.

Embodiment 2

[0293] Example 2 - Preparation of anti-fogging additive E2 according to the invention:

[0294] In a 25 mL single-necked flask, 13.48 g of organopolysiloxane (4) and 0.022 g of acrylic acid were mixed, which resulted in obtaining a molar ratio r=0.52 and a molar ratio J=1.03. The reaction mixture was kept under magnetic stirring at a temperature of 50 °C for 8 days. No post-reaction treatment was applied. in CDCl 3 of the product obtained at 27 °C 1 H NMR analysis (128 scans) showed that the acrylic functional group had disappeared.

Embodiment 3

[0295] Example 3 - Preparation of anti-fogging additive E3 according to the invention:

[0296] In a 25 mL single-necked flask, 10.01 g of organopolysiloxane (3) and 0.461 g of acrylic acid were mixed, which resulted in obtaining a molar ratio r=0.5 and a molar ratio J=0.99. The reaction mixture was kept under magnetic stirring at a temperature of 50 °C for 7 days. No post-reaction treatment was applied. in CDCl 3 of the product obtained at 27 °C 1 H NMR analysis (128 scans) showed that the acrylic functional group had disappeared.

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Abstract

The present invention relates to the general field of coating various flexible supports such as paper or synthetic polymers (polyolefins, polyesters, etc.) or textiles with silicones on high speed rolls. The present invention relates to an effective method for preventing fogging when coating flexible supports with a liquid silicone composition as a crosslinked coating precursor by means of a roll coating device operating at high speed.

Description

technical field [0001] The present invention relates to the general field of coating various flexible supports such as paper or synthetic polymers (polyolefins, polyesters, etc.) or textiles with silicones on high speed rolls. [0002] More particularly, the present invention relates to the coating of flexible materials with liquid compositions comprising one or more organopolysiloxanes crosslinkable by polyaddition, dehydrocondensation, polycondensation, cationic or free radical routes, to Formation of protective films or coatings with particularly anti-adhesive and / or hydrophobic properties. Background technique [0003] The flexible carrier can be paper, cardboard, plastic film, metal film or textile. Applications of these silicone-coated supports are, for example: food paper (baking, packaging), adhesive labels and tapes, conveyor belts, etc. [0004] The coating of these flexible supports with crosslinkable liquid silicones takes place in coating devices operating con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/08C08K5/544D21H19/32C09D7/80
CPCB62B5/0033B62B3/02C09D5/00C08G77/26C08G77/388B62B2202/404C09D7/65C09D183/06C08G77/20C09D183/08C08L83/00B05D1/28B05D5/08C08G77/70
Inventor G·皮布雷A·詹尼斯特S·贝尼托J-M·弗朗西丝E·弗勒瑞F·甘纳绍D·波利尼亚德阿尔梅达
Owner ELKEM SILICONES FRANCE SAS
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