Bodied siloxane resin including M, Q, and T-propyl units and capped with additional M units

1. A bodied siloxane resin comprising M, Q, and T-propyl units and capped with additional M units wherein said bodied siloxane resin capped with additional M units contains less silanol groups than said bodied siloxane resin before being capped with additional M units, and wherein the bodied siloxane resin capped with additional M units has an initial molecular weight (M wi ) and an aged molecular weight (M wa ) after aging said bodied siloxane resin capped with additional M units at 110° C. for 70 hours, wherein said M wa increases 100% or less from said M wi .

2. The bodied siloxane resin capped with additional M units of claim 1 comprising the units:

(R 1 3 SiO 1/2 ) a ;

(R 2 2 SiO 2/2 ) b ;

(R 3 SiO 3/2 ) c ;

(SiO 4/2 ) d , wherein:

each R 1 , R 2 , and R 3 is independently selected from a substituted or unsubstituted carbon-containing group comprising from 1 to 10 carbon atoms, an amino group, and a sulfido group, with the proviso that at least 0.40 mole of the R 3 groups per mole of silicon in the R 3 SiO 3/2 units are propyl groups, and

a+b+c+d= 1.

3. The bodied siloxane resin capped with additional M units of claim 2 wherein a ranges from 0.05 to 0.50, b ranges from 0 to 0.30, c is greater than 0, and d ranges from 0.05 to 0.60.

4. The bodied siloxane resin capped with additional M units of claim 1 wherein at least 0.80 moles of the R 3 groups per mole of silicon in the R 3 SiO 3/2 units are propyl groups.

5. The bodied siloxane resin capped with additional M units of claim 1 wherein said M wa increases 50% or less from said M wi .

6. The bodied siloxane resin capped with additional M units of claim 1 comprises from 0.02 to 0.20 moles of silanol groups per mole of silicon.

7. The bodied siloxane resin capped with additional M units of claim 1 comprises from 0.03 to 0.15 moles of silanol groups per mole of silicon.

8. The bodied siloxane resin capped with additional M units of claim 2 wherein the substituted or unsubstituted carbon-containing group comprising from 1 to 10 carbon atoms is selected from a substituted or unsubstituted hydrocarbyl group containing from 1 to 10 carbon atoms.

9. A bodied siloxane resin comprising M, Q, and T-propyl units and capped with additional M units wherein said bodied siloxane resin capped with additional M units contains less silanol groups than said bodied siloxane resin before being capped with additional M units,

wherein the bodied siloxane resin capped with additional M units has an initial molecular weight (M wi ) and an aged molecular weight (M wa ) after aging said bodied siloxane resin capped with additional M units at 110° C. for 70 hours, wherein said M wa increases 100% or less from said M wi ,

wherein said bodied siloxane resin capped with additional M units comprises the units:

(R 1 3 SiO 1/2 ) a ;

(R 2 2 SiO 2/2 ) b ;

(R 3 SiO 3/2 ) c ;

(SiO 4/2 ) d , wherein:

each R 1 , R 2 , and R 3 is independently selected from a substituted or unsubstituted carbon-containing group comprising from 1 to 10 carbon atoms, an amino group, and a sulfido group, with the proviso that at least 0.40 mole of the R 3 groups per mole of silicon in the R 3 SiO 3/2 units are propyl groups,

a+b+c+d= 1, and

wherein said bodied siloxane resin before being capped with additional M units comprises the units:

(R 1 3 SiO 1/2 ) a ;

(R 2 2 SiO 2/2 ) b ;

(R 3 SiO 3/2 ) c ;

(SiO 4/2 ) d ,

with the proviso that a is greater than a′.

10. A bodied siloxane resin comprising M, Q, and T-propyl units and capped with additional M units, wherein said bodied siloxane resin capped with additional M units contains less silanol groups than the bodied siloxane resin before being capped with additional M units,

wherein the bodied siloxane resin capped with additional M units has an initial molecular weight (M wi ) and an aged molecular weight (M wa ) after aging said bodied siloxane resin capped with additional M units at 110° C. for 70 hours, wherein said M wa increases 100% or less from said M wi , and

wherein said bodied siloxane resin capped with additional M units comprising the reaction product of:

a bodied siloxane resin, before being capped with additional M units, which comprises M, Q, and T-propyl units; and

a silicon-containing M group capping agent comprising at least 0.5 moles of monofunctional units per mole of silicon.

11. The bodied siloxane resin capped with additional M units of claim 10 comprising the units:

(R 1 3 SiO 1/2 ) a ;

(R 2 2 SiO 2/2 ) b ;

(R 3 SiO 3/2 ) c ;

(SiO 4/2 ) d , wherein:

each R 1 , R 2 , and R 3 is independently selected from a substituted or unsubstituted carbon-containing group comprising from 1 to 10 carbon atoms, an amino group, and a sulfido group, with the proviso that at least 0.40 mole of the R 3 groups per mole of silicon in the R 3 SiO 3/2 units are propyl groups, and a+b+c+d=1.

12. The bodied siloxane resin capped with additional M units of claim 10 wherein a ranges from 0.05 to 0.50, b ranges from 0 to 0.30, c is greater than 0, and d ranges from 0.05 to 0.60.

13. The bodied siloxane resin capped with M units of claim 10 wherein said M wa increases 50% or less from said M wi .

14. The bodied siloxane resin capped with additional M units of claim 10 comprises from 0.02 to 0.20 moles of silanol groups per mole of silicon.

15. The bodied siloxane resin capped with additional M units of claim 10 comprises from 0.03 to 0.15 moles of silanol groups per mole of silicon.

16. The bodied siloxane resin capped with additional M units of claim 10 wherein said bodied siloxane resin, before being capped with additional M units, is selected from a group including:

((CH 3 ) 3 SiO 1/2 ) a (CH 3 CH 2 CH 2 SiO 3/2 ) c (SiO 4/2 ) d ;

((CH 3 ) 3 SiO 1/2 ) b ((CH 3 ) 2 SiO 2/2 ) b (CH 3 CH 2 CH 2 SiO 3/2 ) c (SiO 4/2 ) d ;

((CH 3 ) 3 SiO 1/2 ) a (CH 3 ) 2 SiO 2/2 ) b ((CH 3 )(C 6 H 5 )SiO 2/2 ) b′ (CH 3 CH 2 CH 2 SiO 3/2 ) c (SiO 4/2 ) d ;

((CH 3 ) 3 SiO 1/2 ) a ((CH 3 ) 2 SiO 2/2 ) b (CH 3 CH 2 CH 2 SiO 3/2 ) c (C 6 H 5 SiO 3/2 ) c (SiO 4/2 ) d ;

((CH 3 ) 3 SiO 1/2 ) a ((CH 3 ) 2 SiO 2/2 ) b (CH 3 )(C 6 H 5 )SiO 2/2 ) 1 ) b′ (CH 3 CH 2 CH 2 SiO 3/2 ) c (C 6 H 5 SiO 3/2 ) c (SiO 4/2 ) d , and

wherein a ranges from 0.05 to 0.5, the sum of b+b′ ranges from 0 to 0.3, c ranges from 0.05 to 0.65, and d ranges from 0.05 to 0.6.

17. The bodied siloxane resin capped with additional M units of claim 10 wherein at least 0.80 moles of the R 3 groups per mole of silicon in the R 3 SiO 3/2 units of said bodied siloxane resin capped with additional M units are propyl groups.

18. The bodied siloxane resin capped with additional M units of claim 10 wherein said silicon-containing M group capping agent is represented by the following general formula:

wherein:

Z is Cl, an alkoxy group containing from 1 to 10 carbon atoms, or a hydrocarbyl group containing from 1 to 10 carbon atoms,

each R 4 , R 5 , and R 6 is independently hydrocarbyl groups containing from 1 to 10 carbon atoms,

X is O or NH, and

y ranges from 0 to 10.

19. The bodied siloxane resin capped with additional M units of claim 10 wherein said silicon-containing M group capping agent comprises trimethylchlorosilane, trimethylalkoxysilane, hexamethyldisiloxane, or hexamethyldisilazane.