EP0006705B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Radiation curable silicon release compositions, their use in making coated articles and laminates and the articles and laminates produced thereby
Assignee: Union Carbide Corp
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Filing: 1979-06-11
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Granted: 1983-02-16
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Expires: 1999-06-11
Abstract
No abstract record available.
Inventors
- 👤 Gunther William Babian
- 👤 Maryann Cully
- 👤 Richard Bruce Metzler
- 👤 Arthur Noah Pines
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 14:39
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/32; C; C09; C09D; C09D183/00; C09D183/04; C09D183/06; C09J; C09J7/00; C09J7/40; C09J7/401; C09J2301/00; C09J2301/40; C09J2301/416; C09J2400/00; C09J2400/20; C09J2400/28; C09J2400/283; C09J2483/00; C09J2483/005; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1424; Y10T428/1429; Y10T428/28; Y10T428/2839; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
212 words
A silicone release coating composition, curable by exposure to ionizing radiation or actinic nonionizing radiation, comprising: (A) from 10 to 90 weight percent, based on the total weight of the composition, of an organopolysiloxane of the formula wherein m has an average value greater than 25; each R, individually, is acryloxy, methacryloxy, an unsubstituted monovalent hydrocarbon radical having from 1 to 20 carbon atoms or a substituted monovalent hydrocarbon radical wherein the substituents are selected from chloro, fluoro cyano, amido, nitro, ureido, isocyanato, carbalkoxy, hydroxy, acryloxy and methacryloxy; and n has an average value of from 1.8 to 2.2; said organopolysiloxane containing an average of at least one acryloxy or rnethacry!oxy group; (B) from 90 to 10 weight percent, based on the weight of the composition of an acrylyl crosslinker chosen from (i) di-, tri-, and tetrafunctional acrylate or methacrylate esters of organic polyfunctional alcohols, having a molecular weight up to 1,200 and (ii) siloxane polyacrylates having from 1 to 25 siloxy groups and from 2 to 6 organic groups which contain an acryloxy or methacryloxy radical, each of said organic groups being bonded to a silicon atom through a carbon-silicon or carbon-oxygen-silicon bond; and (C) from 0 to 10 weight percent, based on the weight of the composition, of a photosensitizer.
Claim 2
Dependent Claim
212 words
A silicone release coating composition, curable by exposure to ionizing radiation or actinic nonionizing radiation, comprising: (A) from 10 to 90 weight percent, based on the total weight of the composition, of an organopolysiloxane of the formula wherein m has an average value greater than 25; each R, individually, is acryloxy, methacryloxy, an unsubstituted monovalent hydrocarbon radical having from 1 to 20 carbon atoms or a substituted monovalent hydrocarbon radical wherein the substituents are selected from chloro, fluoro cyano, amido, nitro, ureido, isocyanato, carbalkoxy, hydroxy, acryloxy and methacryloxy; and n has an average value of from 1.8 to 2.2; said organopolysiloxane containing an average of at least one acryloxy or rnethacry!oxy group; (B) from 90 to 10 weight percent, based on the weight of the composition of an acrylyl crosslinker chosen from (i) di-, tri-, and tetrafunctional acrylate or methacrylate esters of organic polyfunctional alcohols, having a molecular weight up to 1,200 and (ii) siloxane polyacrylates having from 1 to 25 siloxy groups and from 2 to 6 organic groups which contain an acryloxy or methacryloxy radical, each of said organic groups being bonded to a silicon atom through a carbon-silicon or carbon-oxygen-silicon bond; and (C) from 0 to 10 weight percent, based on the weight of the composition, of a photosensitizer.
Claim 3
Dependent Claim
42 words
A silicone release coating composition as claimed in claim 1, wherein said component (A) is present at a concentration of from 20 to 50 weight percent and said component (B) is present at a concentration of from 50 to 80 weight percent.
Claim 4
Dependent Claim
27 words
A silicon release coating composition as claimed in claim 1 or 2, wherein said photosensitizer is present at a concentration of from 0.5 to 5 weight percent.
Claim 5
Dependent Claim
26 words
A silicone release coating composition as claimed in any one of the preceding claims, wherein said organopolysiloxane contains from 2 to 10 acryloxy and/or methacryloxy groups.
Claim 6
Dependent Claim
75 words
A silicone release coating composition as claimed in any one of the preceding claims, wherein said organopolysiloxane, component (A), is an essentially linear compound containing from 2 to 10 groups of the formula wherein Me is methyl, X is hydrogen or methyl and R' is alkylene of from 1 to 3 carbon atoms; from 100 to 500 groups of the formula Me 2 SiO; and terminal groups of the structure Me 3 Si0 "2 .
Claim 7
Dependent Claim
114 words
A silicone release coating composition as claimed in any one of the preceding claims, wherein said polyacrylyl crosslinker, component (B), is a siloxane acrylate of the formula MD,,M wherein D, in each occurrence, is a unit of the formula R"2SiO, wherein R", in each occurrence, is alkyl, alkoxy, acryloxyalkyl, methacryloxyalkyl, acryloxyalkoxy, or methacryloxyalkoxy, M, in each occurrence, is an end capping unit chosen from alkyl of from 1 to 8 carbon atoms, acryloxyalkyl and methacryloxyalkyl, and R" 3 SiO 1/2 where R" is alkyl, acryloxyalkyl, methacryloxyalkyl, acryloxyalkoxy, and methacryloxyalkoxy; and x has a value of from 1 to 25; provided there are present in the compound from 2 to 6 acryloxy and/or methacryloxy groups.
Claim 8
Dependent Claim
30 words
A silicone release coating composition as claimed in claim 1, wherein said polyacrylyl cross- linker is 2',2' - dimethyl - 3' - acryloxypropyl 2,2 - dimethyl - 3 - acryloxypropionate.
Claim 9
Dependent Claim
19 words
A silicone release coating composition as claimed in any one of the preceding claims, wherein said polyacrylyl crosslinker is
Claim 10
Dependent Claim
53 words
A silicone release coating composition as claimed in any one of the preceding claims, wherein there is additionally present in the composition, from 0.01 to 30 weight percent, based on the weight of the composition, of a liquid organic monoacrylate ester compound having a viscosity of less than 50 cps (0.05 Pa s).
Claim 11
Dependent Claim
27 words
10 . A silicone release coating composition as claimed in claim 9, wherein said liquid organic monoacrylate ester compound is 2 - (N - methylcarbamyloxy) ethyl acrylate.
Claim 12
Dependent Claim
38 words
A silicone release coating composition as claimed in any one of the preceding claims, wherein there is additionally present therein from 0.01 to 15 weight percent, based on the weight of the composition, of a silane adhesion promoter.
Claim 13
Dependent Claim
17 words
A silicone release coating composition as claimed in claim 11, wherein said silane adhesion promoter is gamma-methacryloxypropyltrimethoxysilane.
Claim 14
Independent Claim
47 words
A method of producing a silicone release coated article which comprises: (A) applying to a substrate a coating of the composition claimed in any one of claims 1 to 12, and (B) curing the coating on the substrate by exposing it to ionizing or non-ionizing actinic radiation.
Claim 15
Dependent Claim
20 words
A method as claimed in claim 13, wherein the coating on the substrate is cured by exposure to ultraviolet light.
Claim 16
Dependent Claim
14 words
A method as claimed in claim 13 or 14, wherein said substrate is paper.
Claim 17
Dependent Claim
34 words
A release coated article comprising a substrate having on its surface a coating of a composition as claimed in any one of claims 1 to 12, which has been cured by exposure to radiation.
Claim 18
Dependent Claim
14 words
A release coated article as claimed in claim 16, wherein said substrate is paper.
Claim 19
Dependent Claim
94 words
A laminate comprising: (a) a first substrate; (b) a second substrate; (c) a release layer consisting of a composition as claimed in any one of claims 1 to 12, which has been cured by exposure to radiation; and (d) a layer consisting of a pressure sensitive adhesive composition; said release layer being interposed between said first substrate and layer of pressure sensitive adhesive and being preferentially adherent to said first substrate; and said pressure sensitive adhesive layer being interposed between said release layer and second substrate and being preferentially adherent to said second substrate.
Claim 20
Dependent Claim
13 words
A laminate as claimed in claim 18, wherein said first substrate is paper.
References Cited (Backward Citations)
No citation records indexed.
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