SILICONE RESIN-LINEAR COPOLYMER AND RELATED METHODS

1 . A silicone resin-linear co-polymer comprising a resinous structure (A1) including R 1 SiO 3/2 units, and a linear structure (A2) including repeated R 2 2 SiO 2/2 units, wherein R 1 is a propyl group and each R 2 is an independently selected substituted or unsubstituted hydrocarbyl group, and wherein the resinous structure (A1) and the linear structure (A2) are bonded together in the silicone resin-linear copolymer via a siloxane bond.

2 . The silicone resin-linear copolymer of claim 1 consisting of the resinous structure (A1) and the linear structure (A2).

3 . The silicone resin-linear copolymer of claim 1 , wherein the resinous structure (A1) consists of R 1 SiO 3/2 units where R 1 is as defined above.

4 . The silicone resin-linear copolymer of claim 1 , wherein the linear structure (A2) consists of R 2 2 SiO 2/2 units where R 2 is as defined above.

5 . The silicone resin-linear copolymer of claim 1 , wherein the siloxane bond between the resinous structure (A1) and the linear structure (A2) is derived from an acetoxysilyl group.

6 . The silicone resin-linear copolymer of claim 1 , wherein the siloxane bond between the resinous structure (A1) and the linear structure (A2) is derived from dehydrogenation with a Lewis acid catalyst.

7 . A composition comprising:

(A) the silicone resin-linear co-polymer of claim 1 ; and

(B) a carrier fluid.

8 . The composition of claim 7 , wherein:

(i) the (B) carrier fluid comprises (B1) a volatile fluid at 25° C.;

(ii) the composition is further defined as a cosmetic composition; or

(iii) both (i) and (ii).

9 . A film-forming agent comprising the silicone resin-linear co-polymer of claim 1 .

10 . An adhesion promotor comprising the silicone resin-linear co-polymer of claim 1 .

11 . An encapsulant comprising the silicone resin-linear co-polymer of claim 1 .

12 . An electric device including a film formed from the silicone resin-linear co-polymer of claim 1 .

13 . A method of preparing a conformal coating on an electronic device, said method comprising:

applying a composition on the electronic device; and

forming the conformal coating on the electronic device;

wherein the composition is the composition of claim 7 .

14 . A method of preparing a silicone resin-linear copolymer, said method comprising:

reacting a linear organopolysiloxane having at least one silicon-bonded hydroxyl group and an acetoxysilane to give an acetoxysilylated organopolysiloxane; and

reacting the acetoxysilylated organopolysiloxane with a silicone resin having at least one silicon-bonded hydroxyl group to give the silicone resin-linear copolymer;

wherein the silicone resin-linear copolymer is that of claim 1 .

15 . A method of preparing a silicone resin-linear copolymer, said method comprising:

reacting a linear organopolysiloxane having at least one silicon-bonded hydrogen atom, hydroxyl group, or alkoxy group and a silicone resin having at least one silicon-bonded hydrogen atom, hydroxyl group, or alkoxy group in the presence of a Lewis acid catalyst;

with the proviso that when the linear organopolysiloxane includes the silicon-bonded hydrogen atom, the silicone resin includes a silicon-bonded hydroxyl group or alkoxy group, and when the linear organopolysiloxane includes the silicon-bonded hydroxyl group or alkoxy group, the silicone resin includes the silicon-bonded hydrogen atom; and

wherein the silicone resin-linear copolymer is that of claim 1 .