Back to results
US 2017/0369619 A1Published application
Radiation-curable coating compounds consisting of a plurality of components, and the use of same in release-coated substrates
AssigneeEvonik Degussa GmbH
InventorsHardi DOEHLER, Mike BRAND
Life of this patent
Estimating the term…
Abstract
A composition contains at least one siloxane having ethylenically unsaturated, radically-polymerizable groups, and at least one hydrocarbon having 2 to 6 ethylenically-unsaturated, radically-polymerizable groups, and can be used as a release coating, said composition allowing a good degree of release behavior from adhesive compounds while at the same time also achieving a high level of adhesion of the coating to the carrier material.
Claims11
1:
- A composition, comprising:
- components (I), (II) and optionally (III)
- (I) 1 to 90 wt %, based on the sum of all components of the composition, of one or more hydrocarbons consisting of the elements carbon, hydrogen and oxygen and having 2 to 6 ethylenically unsaturated, radically polymerizable groups and at least one oxyethylene group,
- (II) 10 to 99 wt %, based on the sum of all components of the composition, of one or more organo-modified silicones having 50 to 500 silicon atoms, wherein optionally 0.4% to 10% of the silicon atoms carry ethylenically unsaturated, radically polymerizable groups, and optionally one silicon atom carries one, two or three ethylenically unsaturated, radically polymerizable groups,
- (III) 0 to 70 wt %, based on the sum of all components of the composition, of one or more organomodified silicones having 4 to 40 silicon atoms, where 15% to 100% of the silicon atoms have ethylenically unsaturated, radically polymerizable groups,
- with component (I) being optionally free of silicon atoms.
3 more elements
2:
- The composition as claimed in claim 1, wherein the component (II) has, as ethylenically unsaturated, radically polymerizable groups, acrylic and/or methacrylic ester functions.
3:
- The composition as claimed in claim 1, wherein the component (III) comprises not only the ethylenically unsaturated, radically polymerizable groups but also ester groups which are as yet not radically polymerizable.
4:
- The composition as claimed in claim 2, wherein the components (II) have no ester groups which are not radically polymerizable.
5:
- The composition as claimed in claim 1, wherein the components (II) comprise one or more compounds of the formula (I),
- M1aM2bD1cD2d (I)
- where
- M1=[R13SiO1/2],
- M2=[R12R2SiO1/2],
- D1=[R1R2SiO2/2],
- D2=[R1R2SiO2/2],
- a=0 to 2,
- b=0 to 2, and a+b=2,
- c=50 to 490,
- d=0 to 15,
- and the ratio of the sum (b+d) to the sum (c+d+2) is from 0.004 up to 0.1;
- and the sum (c+d+2) is 50 to 500,
- R1 denotes identical or different aliphatic hydrocarbons having 1 to 10 carbon atoms or aromatic hydrocarbons having 6 to 12 carbon atoms,
- R2 denotes identical or different hydrocarbons which have 1 to 5 identical or different ester functions, the hydrocarbon being linear, cyclic, branched and/or aromatic, and the ester functions being selected from ethylenically unsaturated, radically polymerizable ester functions and from ester groups which are not radically polymerizable.
12 more elements
6:
- The composition as claimed in claim 1, wherein the component (III) comprises a compound of the formula (II)
- M1eM3fD1gD3h (II)
- where
- M1=[R13SiO1/2],
- M3=[R12R3SiO1/2],
- D1=[R12SiO2/2],
- D3=[R1R3SiO2/2],
- e=0 to 2,
- f=0 to 2, and e+f=2,
- g=0 to 38,
- h=0 to 20,
- and the ratio of the sum (f+h) to the sum (g+h+2) is from 0.15 up to 1,
- and the sum (g+h+2) is 4 to 40,
- and the radicals R1 are defined as specified for formula (I),
- R3 denotes identical or different hydrocarbons which have 1 to 5 identical or different ester functions, the hydrocarbon being linear, cyclic, branched and/or aromatic, and the ester functions being selected from ethylenically unsaturated, radically polymerizable ester functions and from ester groups which are not radically polymerizable.
12 more elements
7:
- The composition as claimed in claim 1, wherein component (III) is necessarily included.
8:
- A radiation-curing coating material, comprising:
- the composition as claimed in claim 1.
9:
- The radiation-curing coating material as claimed in claim 8, which is a release coating material.
10:
- The radiation curing coating material as claimed in claim 8, further comprising an additive.
11:
- The radiation-curing coating materials as claimed in claim 10, wherein the additive is at least one selected from the group consisting of photoinitiators, photosensitizers, fillers, pigments, solvents, phosphorus-containing compounds which polymerize under UV light, stabilizers, anti-misting additives and amine synergists.