Microparticle containing silicone release coatings having improved anti-block and release properties

A technology for isolating coatings and particles, which can be used in coatings, adhesives, thin material processing, etc., and can solve the problem of expensive silicone materials

Inactive Publication Date: 2006-08-02
RHODIA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, silicone materials can be relatively expensive, so there is also a need to minimize the amount of silicone material needed to produce the release composition

Method used

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  • Microparticle containing silicone release coatings having improved anti-block and release properties
  • Microparticle containing silicone release coatings having improved anti-block and release properties
  • Microparticle containing silicone release coatings having improved anti-block and release properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] The starting composition of the isolation coating is:

[0121] 60 parts by weight of curable epoxy polyorganosiloxane compound VI, wherein n is 20

[0122] 30 parts by weight of polyorganosiloxane of compound VII, wherein r is 220

[0123] 10 parts by weight of the polyorganosiloxane compound VIII, wherein p is 200, q is 3

[0124] 2.5 parts by weight of cationic initiator

[0125] 1-3 parts of polymer microspheres

[0126] The photoinitiator used in the test compositions was available from Rhodia Corporation as Silcolease(R) UVCata 211, a cationic photoinitiator activated by ultraviolet radiation. Polymer particles are commercially available from Micro Powders Inc under the name FLUO HT(R) polytetrafluoroethylene (PTFE) microspheres. Polymer microspheres were prepared as a dilution in formula (VII), which constituted 33% by weight of the weight of formula (VII).

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Abstract

The invention is directed to a polymeric microparticle containing silicone release composition having improved slip / shear, anti-block, transfer, and lower release properties. The silicone release composition may be formed of thermal or radiation cured solventless silicone release compositions. The silicone release composition may also be formed of a UV-cationic silicone release composition. The polymeric microparticles are preferably polymeric microspheres. The invention is further directed to the use of such microparticle containing silicone release compositions to coat a substrates formed thereof.

Description

technical field [0001] The present invention relates generally to silicone release coating compositions, the use of such silicone release coating compositions to coat substrates, and release coated substrates formed therefrom. More specifically, the present invention relates to heat-curable, radiation-curable and UV cationic solvent-free silicones having improved slip / shear properties, transfer properties, anti-blocking properties and reduced release properties Barrier coating. Background technique [0002] Silicone release coatings or compositions are well known and are the subject of numerous publications and patents. They are useful in many applications where a relatively non-adhesive surface is desired. In these applications, the release composition is applied to a substrate and allowed to cure. One particularly useful application is the coating of paper, polyethylene film and other materials used in providing release surfaces, pressure sensitive adhesive labels, deco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04B29C33/64B32B9/04C08F2/46C08G59/30C08L83/04C09DC09D183/04
CPCC09D183/04C08K7/16C08K7/22C09D5/00C09D7/125C09D7/1291C09D183/06C09J2423/005C09J2427/005C09J2483/005B29C33/64C08G59/306Y10T428/31663C08L2666/66C08L2666/02C08L2666/04
Inventor 让-马克·弗朗西斯迈克尔·D·拉德尔斯图尔特·R·克尔三世杰弗里·胡佛詹姆斯·G·埃利森
Owner RHODIA LTD
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