Silicone resins, silicone composition, and coated substrates

1. A silicone resin having the formula: [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v (R 1 3 SiO 1/2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y (SiO 4/2 ) z , wherein each R 1 is independently —H, hydrocarbyl, or substituted hydrocarbyl; a is 0, 1, or 2; b is 0, 1, 2 or 3; 0.01≦v<0.3, w is from 0 to 0.8; x is 0; y is from 0.1 to 0.8; z is from 0 to 0.99; and v+w+x+y+z=1, wherein the resin contains from 5 to 50% (w/w) of silicon-bonded hydroxy groups.

2. The silicone resin according to claim 1 , wherein v has a value of from 0.1 to 0.25.

3. The silicone resin according to claim 1 , wherein the resin has a number-average molecular weight of from 500 to 150,000.

4. A silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v′(R 1 3 SiO 1/2 ) w′ (R 1 2 SiO 2/2 ) x′ (R 1 SiO 3/2 ) y′ (SiO 4/2 ) z′ , wherein each R 1 is independently —H, hydrocarbyl, or substituted hydrocarbyl; a is 0, 1, or 2; b is 0, 1, 2 or 3; 0.7<v′≦1.0, w′ is from 0 to 0.3; x′ is 0; y′ is from 0 to 0.3; z′ is from 0 to 0.3; and v′+w′+x′+y′+z′=1.

5. The silicone resin according to claim 4 , wherein the resin has a number-average molecular weight of from 500 to 150,000.

6. The silicone resin according to claim 4 , wherein the resin contains from 5 to 50% (w/w) of silicon-bonded hydroxy groups.

7. A silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v′ (R 1 3 SiO 1/2 ) w′ (R 1 2 SiO 2/2 ) x′ (R 1 SiO 3/2 ) y′ (SiO 4/2 ) z′ , wherein each R 1 is independently —H, hydrocarbyl, or substituted hydrocarbyl; a is 0, 1, or 2; b is 0, 1, 2 or 3, w′ is from 0 to 0.3; x′ is from 0 to 0.3; y′ is from 0 to 0.3; z′ is from 0 to 0.3; and v′+w′+x′+y′+z′=1, wherein v′ has a value of from 0.75 to 0.9.

8. The silicone resin according to claim 7 , wherein v′ has a value of from 0.8 to 0.9.

9. The silicone resin according to claim 7 , wherein the resin has a number-average molecular weight of from 500 to 150,000.

10. The silicone resin according to claim 7 , wherein the resin contains from 5 to 50% (w/w) of silicon-bonded hydroxy groups.

11. A silicone composition comprising:

(A) a silicone resin selected from (i) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v (R 1 3 SiO 1/2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y (SiO 4/2 ) z , (ii) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v′ (R 1 3 SiO 1/2 ) w′ (R 1 2 SiO 2/2 ) x′ (R 1 SiO 3/2 ) y′ (SiO 4/2 ) z′ and (iii) a mixture comprising (i) and (ii), wherein each R 1 is independently —H, hydrocarbyl, or substituted hydrocarbyl; a is 0, 1, or 2; b is 0, 1, 2 or 3; 0.01≦v<0.3, w is from 0 to 0.8; x is 0; y is from 0.1 to 0.8; z is from 0 to 0.99; and v+w+x+y+z=1, 0.7<v′≦1.0, w′ is from 0 to 0.3; x′ is 0; y′ is from 0 to 0.3; z′ is from 0 to 0.3; and v′+w′+x′+y′+z′=1; and

(B) an organic solvent,

wherein when the silicone resin includes (i) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v (R 1 3 SiO 1/2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y (SiO 4/2 ) z , the resin contains from 5 to 50% (w/w) of silicon-bonded hydroxy groups.

12. The silicone composition according to claim 11 , further comprising at least one of a cross-linking agent and a condensation catalyst.

13. A coated substrate comprising:

a substrate; and

a coating on the substrate, wherein the coating is a cured product or an oxidized product of a silicone resin selected from (i) at least one silicone resin having the formula [O( 3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v (R 1 3 SiO 1/2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y′ (SiO 4/2 ) z′ , (ii) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v′ (R 1 3 SiO 1/2 ) w′ (R 1 2 SiO 2/2 ) x′ (R 1 SiO 3/2 ) y′ (SiO 4/2 ) z′ and (iii) a mixture comprising (i) and (ii), wherein each R 1 is independently —H, hydrocarbyl, or substituted hydrocarbyl; a is 0, 1, or 2; b is 0, 1, 2 or 3; 0.01≦v<0.3, w is from 0 to 0.8; x is 0; y is from 0.1 to 0.8; z is from 0 to 0.99; and v+w+x+y+z=1, 0.7<v′≦1.0, w′ is from 0 to 0.3; x′ is 0; y′ is from 0 to 0.3; z′ is from 0 to 0.3; and v′+w′+x′+y′+z′=1,

wherein when the silicone resin includes (i) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v (R 1 3 SiO 1/2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y (SiO 4/2 ) z , the resin contains from 5 to 50% (w/w) of silicon-bonded hydroxy groups.

14. The coated substrate according to claim 13 , wherein the coating has a thickness of from 0.01 to 20 μm.

15. A silicone composition comprising:

(A) a silicone resin selected from (i) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v (R 1 3 SiO 1/2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y (SiO 4/2 ) z , (ii) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] y′ (R 1 3 SiO 1/2 ) w′ (R 1 2 SiO 2/2 ) x′ (R 1 SiO 3/2 ) y′ (SiO 4/2 ) z′ and (iii) a mixture comprising (i) and (ii), wherein each R 1 is independently —H, hydrocarbyl, or substituted hydrocarbyl; a is 0, 1, or 2; b is 0, 1, 2 or 3; 0.01≦v<0.3, w is from 0 to 0.8; x is 0; y is from 0.1 to 0.8; z is from 0 to 0.99; and v+w+x+y+z=1, w′ is from 0 to 0.3; x′ is from 0 to 0.3; y′ is from 0 to 0.3; z′ is from 0 to 0.3; and v′+w′+x′+y′+z′=1, wherein v′ has a value of from 0.75 to 0.9; and

(B) an organic solvent,

wherein when the silicone resin includes (i) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b/2 ] v (R 1 3 SiO 1/2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y (SiO 4/2 ) z , the resin contains from 5 to 50% (w/w) of silicon-bonded hydroxy groups.

16. The silicone composition according to claim 15 , wherein v′ has a value of from 0.8 to 0.9.

17. The silicone composition according to claim 15 , further comprising at least one of a cross-linking agent and a condensation catalyst.

18. A coated substrate comprising:

a substrate; and

a coating on the substrate, wherein the coating is a cured product or an oxidized product of a silicone resin selected from (i) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v (R 1 3 SiO 1 /2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y (SiO 4/2 ) z , (ii) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v′ (R 1 3 SiO 1/2 ) w′ (R 1 2 SiO 2/2 ) x′ (R 1 SiO 3/2 ) y′ (SiO 4/2 ) z′ and (iii) a mixture comprising (i) and (ii), wherein each R 1 is independently —H, hydrocarbyl, or substituted hydrocarbyl; a is 0, 1, or 2; b is 0, 1, 2 or 3; 0.01≦v<0.3, w is from 0 to 0.8; x is 0; y is from 0.1 to 0.8; z is from 0 to 0.99; and v+w+x+y+z=1, w′ is from 0 to 0.3; x′ is from 0 to 0.3; y′ is from 0 to 0.3; z′ is from 0 to 0.3; and v′+w′+x′+y′+z′=1, wherein v′ has a value of from 0.75 to 0.9,

wherein when the silicone resin includes (i) at least one silicone resin having the formula [O (3-a)/2 R 1 a Si—SiR 1 b O (3-b)/2 ] v (R 1 3 SiO 1/2 ) w (R 1 2 SiO 2/2 ) x (R 1 SiO 3/2 ) y (SiO 4/2 ) z , the resin contains from 5 to 50% (w/w) of silicon-bonded hydroxy groups.

19. The coated substrate according to claim 18 , wherein v′ has a value of from 0.8 to 0.9.

20. The coated substrate according to claim 18 , wherein the coating has a thickness of from 0.01 to 20 μm.