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US 2019/0161656 A1Published application
Permeation-inhibiting release coating
AssigneeEvonik Degussa GmbH
InventorsJuergen POMORIN, Dieter GRAUER, Hardi DOEHLER, Ingo SCHOENEMANN, Mike BRAND
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Abstract
The invention relates to compositions containing at least one siloxane which comprises ethylenically unsaturated, radically polymerizing groups, and at least one hydrocarbon with ethylenically unsaturated, radically polymerizing groups, which have, when used as a separating coating, an improved barrier effect.
Claims15
A permeation-inhibiting release coating obtained by curing a composition comprising components (I), (II) and optionally (III):
- (I) 20 to 90% by weight, based on the sum total of components (I), (II) and (III) of the composition, comprises silicon-free hydrocarbons which consist of carbon, hydrogen and oxygen and which have at least one ethylenically unsaturated free-radically polymerizable group and have no oxyethylene groups,
- wherein component (I) has a hydrocarbon to an extent of at least 80 up to 100% by weight, based on the total mass of component (I), having two or more ethylenically unsaturated free-radically polymerizable groups and at least one aromatic group;
- (II) 10 to 90% by weight, based on the sum total of components (I), (II) and (III) of the composition, of one or more organomodified silicones having 50 to 500 silicon atoms;
- and
- (III) 0 to 70% by weight, based on the sum total of components (I), (II) and (III) of the composition, of one or more organomodified silicones having 4 to 40 silicon atoms, wherein 15 to 100% of the silicon atoms have ethylenically unsaturated free-radically polymerizable groups;
- and
- optionally an additive;
- wherein the permeation-inhibiting release coating has a permeation barrier against butyl acetate, and the permeation-inhibiting release coating has a delta-L* value of from 1 to 20.
5 more elements
A topcoat for thermal papers, comprising:
- a permeation-inhibiting release coating obtained by curing a composition comprising components (I), (II) and optionally (III):
- (I) 20 to 90% by weight, based on the sum total of components (I), (II) and (III) of the composition, comprises silicon-free hydrocarbons which consist of carbon, hydrogen and oxygen and which have at least one ethylenically unsaturated free-radically polymerizable group and have no oxyethylene groups,
- wherein component (I) has a hydrocarbon to an extent of at least 80 up to 100% by weight, based on the total mass of component (I), having two or more ethylenically unsaturated free-radically polymerizable groups and at least one aromatic group;
- (II) 10 to 90% by weight, based on the sum total of components (I), (If) and (III) of the composition, of one or more organomodified silicones having 50 to 500 silicon atoms;
- and
- (III) 0 to 70% by weight, based on the sum total of components (I), (II) and (III) of the composition, of one or more organomodified silicones having 4 to 40 silicon atoms, wherein 15 to 100% of the silicon atoms have ethylenically unsaturated free-radically polymerizable groups;
- and
- optionally an additive;
- wherein the permeation-inhibiting release coating has a permeation barrier against butyl acetate, and the permeation-inhibiting release coating has a delta-L* value of from 1 to 20.
6 more elements
A radiation-curing coating composition for preparing a permeation-inhibiting release coating having a permeation barrier against butyl acetate, the permeation-inhibiting release coating comprising components (I), (II) and optionally (III):
- (I) 20 to 90% by weight, based on the sum total of components (I), (II) and (III) of the composition, comprises silicon-free hydrocarbons which consist of carbon, hydrogen and oxygen and which have at least one ethylenically unsaturated free-radically polymerizable group and have no oxyethylene groups,
- wherein component (I) has a hydrocarbon to an extent of at least 80 up to 100% by weight, based on the total mass of component (I), having two or more ethylenically unsaturated free-radically polymerizable groups and at least one aromatic group;
- (II) 10 to 90% by weight, based on the sum total of components (I), (II) and (III) of the composition, of one or more organomodified silicones having 50 to 500 silicon atoms;
- and
- (III) 0 to 70% by weight, based on the sum total of components (I), (II) and (III) of the composition, of one or more organomodified silicones having 4 to 40 silicon atoms, wherein 15 to 100% of the silicon atoms have ethylenically unsaturated free-radically polymerizable groups;
- and
- an additive,
- wherein the permeation-inhibiting release coating has a delta-L* value of from 1 to 20.
5 more elements
Dependencies are inferred from the claim text.