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Method for the prevention of mist formation in a device comprising rolls during the coating of flexible supports with a cross-linkable liquid silicone composition

A roll coating, silicone technology, applied to the surface coating liquid device, coating, etc., can solve the problem of not providing quantitative factors for evaluation

Active Publication Date: 2021-09-07
ELKEM SILICONES FRANCE SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] For the latter point, the patent US6057033 does not provide any quantitative factors to evaluate the reduction of fogging brought by cellulose fibers

Method used

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  • Method for the prevention of mist formation in a device comprising rolls during the coating of flexible supports with a cross-linkable liquid silicone composition
  • Method for the prevention of mist formation in a device comprising rolls during the coating of flexible supports with a cross-linkable liquid silicone composition
  • Method for the prevention of mist formation in a device comprising rolls during the coating of flexible supports with a cross-linkable liquid silicone composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0343] 1) preparation of antifogging additive E:

[0344] In the following examples, the following compounds were used.

[0345] F1: organopolysiloxane of the following formula having 31 mmol of acrylate functional groups per 100 g.

[0346]

[0347] F2: Silmer ACR Supplier Siltech Corporation, which is a dimethyl polysiloxane with two acrylate functional groups at the chain ends, has 50 mmol of acrylate functional groups per 100 grams.

[0348] G1: organopolysiloxane having the same general formula as F1, with 199 mmol of acrylate functional groups per 100 g.

[0349] H1: hexanediol acrylate with 885 mmol of acrylate functional groups per 100 g.

[0350] N1: organopolysiloxane of the formula having 43 mmol of amine functional groups per 100 g.

[0351]

[0352] Isopropanol

[0353] Synthesis of branched polymers:

[0354] All compounds tested as anti-fogging additives were synthesized by the same method.

[0355] Compounds F, G, H and N were introduced into th...

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Abstract

The invention relates to the general field of coating various flexible supports, such as sheets of paper or synthetic polymer (polyolefin, polyester, etc) sheets or fabric sheets, with a silicone on high-speed rolls. The invention relates to an efficient method for preventing mist formation when coating flexible supports with a liquid silicone composition precursor of cross-linked coatings, said coating process being performed using a coating device that includes a roll operating at a 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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IPC IPC(8): C09D183/06C08L83/06
CPCC08G77/20C08G77/26C08L83/06C09D183/06C08L83/00C09D7/40B05D1/28
Inventor G·皮布雷S·贝尼努E·布格特
Owner ELKEM SILICONES FRANCE SAS
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