US 12,460,080 B2
Photocurable silicone compositions and process for manufacture of release liners
Richard Paul Eckberg, Hillsborough, NC (US); Verena Cramer, Bergisch Gladbach (DE); John A. Cummings, Gansevoort, NY (US); Thorsten Felder, Dusseldorf (DE); Robert Lawrence Frye, Painesville, OH (US); Johannes Hepperle, Langenfeld (DE); and Anita Witossek, Langenfeld (DE)
Assigned to Momentive Performance Materials Inc., Waterford, NY (US)
Filed by Momentive Performance Materials Inc., Waterford, NY (US)
Filed on Feb. 18, 2021, as Appl. No. 17/178,672.
Claims priority of provisional application 62/978,488, filed on Feb. 19, 2020.
Prior Publication US 2021/0277243 A1, Sep. 9, 2021
Int. Cl. C08L 83/06 (2006.01); B05D 3/02 (2006.01); B05D 3/06 (2006.01); C09D 183/06 (2006.01); C09J 7/40 (2018.01)
CPC C08L 83/06 (2013.01) [B05D 3/0263 (2013.01); B05D 3/0272 (2013.01); B05D 3/067 (2013.01); C09D 183/06 (2013.01); C09J 7/401 (2018.01); C09J 7/403 (2018.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01); C09J 2483/005 (2013.01)] 19 Claims
 
1. A photocurable silicone composition comprising:
(i) a vinyl functional polysiloxane of the formula (Ia):
M1ViD1VicD2dM1Vi  (Ia)
where M1vi is (R1)(R2)(CH2═CH)SiO1/2; D1Vi is (R6)(CH2═CH))SiO2/2; D2 is (R7)(R8)SiO2/2; R1, R2, R3, R5, R6, R7, and R8 are each independently a C1-C10 saturated hydrocarbon radical; c is 0; and d is 50-250;
(ii) a hydride functional siloxane selected from a compound of the formula (IIa), (IIb), or (IIc):
M4D3HjD4kM4Q2  (IIa)
M4D3HjM4  (IIb)
M3HhQ2  (IIc)
where
M3H=(R10)(R11)(H)SiO1/2
M4=(R12)(R13)(R14)SiO1/2
D3H=(R15)(H)SiO2/2
D4=(R16)(R17)SiO2/2
Q2=SiO4/2
wherein R10, R11, R12, R13, R14, R15, R16, R17, and R18 are each independently a C1-C10 saturated hydrocarbon, j+k in formaula (IIa) is 10-40, j in formula (IIb) is 10-40, and h is 2 in formula (IIc);
(iii) a photoactive catalyst selected from one or more of a platinum-cyclopentadiene complex of the formula (i) R19CpPtR203, where R19 and R20 are each methyl, and Cp is a cyclopentadiene group, wherein the bond between Cp and Pt is an eta bond; and/or (ii) [1-methyl-3-(1′-naphthyl)-cyclopentadienyl]trimethyl platinum; [1-methyl-3-(2′-naphthyl)-cyclopentadienyl]trimethyl platinum; and (iv) an acid-anhydride functional polysiloxane compound of the formula:
M5AD5oD6ApD7HqM5A
where M5A is (R21)(R22) (R23)SiO1/2
D5 is (R24)(R25)SiO2/2,
D6A is (R26)(R27)SiO2/2
D7H=(R28)(H)SiO2/2
where R21, R22, R24, R25, R26, and R28 are each methyl; R23 and R27 each independently represents an acid-anhydride functional group derived from the reaction of allyl succinic anhydride with Si(H) functionality; o+q is 10-40, and p is 1-20;
wherein the composition cures when processed at a speed of from about 100 to about 750 feet per minute.