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Polyorganosiloxane Anti-sticking coating and preparation and use thereof

A technology of polyorganosiloxane and diorganosiloxane, which is applied in the field of polyorganosiloxane anti-stick coating and its preparation and application, and can solve problems such as coating migration and low peeling force

Active Publication Date: 2021-12-31
DOW SILICONES CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A disadvantage of known silicone release coatings is that, if the release coating composition is formulated to have the desired ultra-low peel force, the coating can suffer from migration

Method used

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  • Polyorganosiloxane Anti-sticking coating and preparation and use thereof
  • Polyorganosiloxane Anti-sticking coating and preparation and use thereof
  • Polyorganosiloxane Anti-sticking coating and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0083] These examples are intended to illustrate some embodiments of the invention to those skilled in the art and are not to be construed as limiting the scope of the invention described in the claims. The following abbreviations are used: RF: peel force (peel tester), CW: coating weight (Oxford XRF), RO: rub off (fix performance), and SAS: subsequent adhesion strength (migration performance).

[0084] RT: room temperature of 25°C. Table 1 below shows the starting materials used in these examples. Viscosities are measured at 25°C unless otherwise indicated.

[0085] Table 1 - Starting materials used in the examples

[0086]

[0087]

[0088] In the above table, M represents the formula (Me 3 SiO 1 / 2 ) unit, D Ph Expression (MePhSiO 2 / 2 ) unit, D Vi Expression (MeViSiO 2 / 2 ) unit, D Ph2 Expression (Ph 2 SiO 2 / 2 ), Me represents methyl, Ph represents phenyl, and Vi represents vinyl.

reference example 1

[0089] Reference Example 1 - Anti-stick coating preparation

[0090] Using the starting materials and amounts indicated in the table, samples of the release coating composition were prepared by the following steps I. and II.

[0091] I. Combine the following starting materials in a container:

[0092] i) Mixture 1 or a mixture of A-2-1 and D-1-1,

[0093] ii) one of the peel force modifiers E) in Table 1,

[0094] iii) fixing additive F-1-1, and

[0095] iv) Crosslinker B-1-1 and mix until uniform. An appropriate amount of toluene solvent was added to homogenize the starting material, if necessary.

[0096] II. Catalyst C-1-1 was added and the resulting mixture was mixed for 10 minutes to form a release coating composition.

[0097] The release coating composition was then coated on the PET substrate using a coater. The release coating composition is cured via thermal addition cure in an oven. (Usually at 140°C for 30 seconds). Three samples of each release coating c...

reference example 2

[0098] Reference Example 2 – Release Coating Evaluation

[0099] (1) Using an Oxford lab-x 3500 instrument manufactured by Oxford Instruments PLC (Oxon, United Kingdom), X-rays were used to evaluate 2 Coat weight (CW) is measured in units of coat weight (CW) of the cured release coating on the substrate. Uncoated PET was used as a control sample (blank). The test method is the seventh test method of FINAT (FINAT Technical Manual, 7th edition, 2005).

[0100] (2) Use the 180 degree peel test to evaluate the peel force in g / in (RF-RT) to measure the peel force from the release liner. Laminate Tesa 7475 standard tape on the cured release coating at 20g / cm 2 A loading weight of 1000 was placed on the laminated sample and left at RT (room temperature of 25°C) for 20 hours. After 20 hours, the loading weights were removed and the samples were allowed to sit for 30 minutes. Peel force was then tested by ChemInstruments AR-1500 using FINAT Clause 10 test method (FINAT Technical...

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Abstract

Provided is a curable polyorganosiloxane anti-sticking coating composition comprising: A) a branched aliphatically unsaturated polyorganosiloxane, B) a crosslinker having at least 3 silicon bonded hydrogen atoms per molecule, C) a hydrosilylation reaction catalyst, D) a hydrosilylation reaction inhibitor, and E) an aryl-functional polydiorganosiloxane having a content of aliphatically unsaturated groups. Also provided are an anti-sticking liner (100) with this coating (101) and a preparation method thereof.

Description

[0001] Cross References to Related Applications [0002] none. technical field [0003] The silicone release coating composition can be coated on a substrate such as plastic film or paper and cured via a hydrosilylation reaction to form a release liner. The silicone release coating composition can provide one or more benefits over release liners known in the art, such as lower peel force and / or good post-adhesion strength and / or low migration (for adhesives adhering to the backside of the release liner and / or substrate). Release liners can be used in applications such as electronic device applications (eg, touch panels) for tape release, label release, and / or adhesive transfer films. Background technique [0004] Silicone release coatings can be used in applications requiring a relatively non-stick surface. Single-sided liners, such as the backing paper used for pressure-sensitive adhesive labels, are generally suitable for temporarily holding the label without affecting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/05C09D183/07
CPCC09D183/04C08G77/12C08G77/20C08G77/80C08L83/00C08K5/56C08K5/05C09D175/04C09J7/401C09D7/63C09J7/38C09J2301/302C08G77/08C08G77/70C09D5/00C09J5/00C09J2203/326C09J2483/005
Inventor 黄福明田中英文西嶋一裕张胜蓝刘志华
Owner DOW SILICONES CORP
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