Release layers and articles containing them

An article comprising:

• a) a backing layer having a first major surface and a second major surface opposite the first major surface;
• and
• b) a first release layer adjacent to the first major surface of the backing layer, wherein the first release layer comprises a first cured reaction product of a first curable release composition comprising
• i) a first siloxane polymer of Formula (I)
• having a weight average molecular weight of at least 1000 Daltons wherein
• R1 is alkyl;
• and
• R2 is hydrogen or an alkyl;
• R3 is alkyl;
• p is an integer equal to at least 10;
• and
• q is an integer in a range of 0 to 0.1(p);
• ii) a first crosslinker is a compound of Formula (II)
• (OR5)3-x(R4)xSi—R8—Si(R4)x(OR5)3-x II
• wherein
• R4 is alkyl or aryl;
• R5 is alkyl;
• R8 is oxy, a group of formula —O—[Si(CH3)2—O]m—, an alkylene, a heteroalkylene, a heteroalkylene substituted with a hydroxyl group, an arylene, a fluorine substituted arylene, or an alkylene-arylene-alkylene group;
• m is an integer in a range of 1 to 10;
• and
• x is an integer equal to 0 or 1;
• iii) a first silane additive having two silyl groups of formula —Si(R6)2(OR7) or
• having a single silyl group of formula —Si(R10)(OR9)2 wherein
• R6 is alkyl or aryl;
• R7 is alkyl;
• R9 is alkyl;
• R10 is alkyl or aryl;
• and
• iv) a first photoacid generator;
• and
• v) an optional first silicate resin.

A method of making an article, the method comprising:

• providing a backing having a first major surface and second major surface opposite the first major surface;
• and
• applying a first curable release composition adjacent to the first major surface of the backing, wherein the first curable release composition comprises
• i) a first siloxane polymer of Formula (I)
• having a weight average molecular weight of at least 1000 Daltons wherein
• R1 is alkyl;
• and
• R2 is hydrogen or alkyl;
• R3 is alkyl;
• p is an integer equal to at least 10;
• and
• q is an integer in a range of 0 to 0.1(p);
• ii) a first crosslinker is a compound of Formula (II)
• (OR5)3-x(R4)xSi—R8—Si(R4)x(OR5)3-x II
• wherein
• R4 is alkyl or aryl;
• R5 is alkyl;
• R8 is oxy, a group of formula —O—[Si(CH3)2—O]m—, an alkylene, a heteroalkylene, a heteroalkylene substituted with a hydroxyl group, an arylene, a fluorine substituted arylene, or an alkylene-arylene-alkylene group;
• m is an integer in a range of 1 to 10;
• and
• x is an integer equal to 0 or 1;
• iii) a first silane additive having two silyl groups of formula —Si(R6)2(OR7)
• or having a single silyl group of formula —Si(R10)(OR9)2 wherein
• R6 is alkyl or aryl;
• R7 is alkyl;
• R9 is alkyl;
• R10 is alkyl or aryl;
• iv) a first photoacid generator;
• and
• v) an optional first silicate resin;
• exposing the first curable release composition to ultraviolet radiation or electron beam radiation to form a first release layer.