Filler treating agents based on hydrogen bonding polyorganosiloxanes

1. A composition consisting essentially of:

(i) a silicone-containing matrix,

(ii) a filler having a surface capable of forming hydrogen bonding with a filler treating agent wherein the filler comprises a reinforcing filler, an extending filler, a thermally conductive filler, or a combination thereof, and

(iii) the filler treating agent; where the filler treating agent comprises a polyorganosiloxane selected from a saccharide-siloxane polymer capable of hydrogen bonding, wherein the saccharide siloxane polymer has unit formula (I):

(R 1 (3-a) R 2 a SiO 1/2 ) b (R 1 (2-c )R 2 c SiO 2/2 ) d (R 2 SiO 3/2 ) e (R 1 3 SiO 1/2 ) f (R 1 2 SiO 2/2 ) g (R 1 SiO 3/2 ) h (SiO 4/2 ) i ; where

each subscript a is independently 0, 1, 2, or 3;

subscript b has a value of 0 or greater;

each subscript c is independently 0, 1, or 2;

subscript d has a value of 0 or greater;

subscript e has a value of 0 or greater;

if a quantity (a+c) is 0, then subscript e has a value of 1 or greater;

a quantity (b+d+e) is 1 or greater;

subscript f has a value of 0 or greater;

subscript g has a value of 0 or greater;

subscript h has a value of 0 or greater;

subscript i has a value of 0 or greater;

each R 1 can be the same or different and comprises hydrogen, an alkyl group of 1 to 12 carbon atoms, an organic radical, or a group of formula R 3 -Q;

Q comprises an epoxy, cycloepoxy, primary or secondary amino, ethylenediamine, carboxy, halogen, vinyl, allyl, anhydride, or mercapto functionality;

each R 2 has the formula Z-(G 1 ) n -(G 2 ) o , and there is an average of at least one R 2 per polymer molecule;

G 1 is a saccharide component comprising 5 to 12 carbon atoms;

a quantity (n+o) is 1 to 10, and

subscript n or subscript o can be 0;

G 2 is a saccharide component comprising 5 to 12 carbon atoms, and G 2 is additionally substituted with an organic radical or an organosilicon radical;

each Z is a linking group independently selected from the group consisting of

—R 3 —NHC(O)—R 4 —;

—R 3 —NHC(O)O—R 4 —;

—R 3 —NH—C(O)—NH—R 4 —;

—R 3 —C(O)—O—R 4 —;

—R 3 —O—R 4 —;

—R 3 —CH(OH)—CH 2 —O—R 4 —;

—R 3 —S—R 4 —;

—R 3 —CH(OH)—CH 2 —NH—R 4 —;

—R 3 —N(R 1 )—R 4 —;

—NHC(O)—R 4 —;

—NHC(O)O—R 4 —;

—NH—C(O)—NH—R 4 —;

—C(O)—O—R 4 —;

—O—R 4 —;

—CH(OH)—CH 2 —O—R 4 —;

—S—R 4 —;

—CH(OH)—CH 2 —NH—R 4 —;

—N(R 1 )—R 4 —;

—R 3 —NHC(O)—;

—R 3 —NHC(O)O—;

—R 3 —NH—C(O)—NH—;

—R 3 —C(O)—O—;

—R 3 —O—;

—R 3 —CH(OH)—CH 2 —O—;

—R 3 —S—;

—R 3 —CH(OH)—CH 2 —NH—; and

—R 3 —N(R 1 )—;

where each R 3 and each R 4 is independently a divalent spacer comprising a group of formula (R 5 ) r (R 6 ) s (R 7 ) t ,

 where subscripts r, s, and t are each independently 0 or 1, and at least one of r, s and t is 1;

 each R 5 and each R 7 are independently either an alkyl group of 1 to 12 carbon atoms or a group of formula (R 9 O) P , where R 9 is a hydrocarbon group of 1 to 12 carbon atoms, subscript p is an integer ranging from 1 to 50, and each R 9 O may be the same or different and

 R 6 is —N(R 8 )—, where R 8 is hydrogen or an alkyl group of 1 to 12 carbon atoms,

wherein the amount of filler treating agent ranges from 0.1% to 10%, based on the weight of the filler and where the polyorganosiloxane is free of condensable silyl groups.

2. The composition of claim 1 , where the saccharide-siloxane polymer has formula (II): R 2 a R 1 (3-a) SiO—[(R 2 R 1 SiO) j (R 1 2 SiO) k ] m —SiR 1 (3-a) R 2 a ; where

subscript j is an integer with a value ranging from 0 to 10,000;

subscript k is an integer with a value ranging from 0 to 10,000;

subscript m is an integer such that the polymer has a molecular weight less than 1 million.

3. The composition of claim 2 , where the filler treating agent comprises a saccharide-siloxane polymer of formula (III):

where each subscript u is independently 5 to 12;

each subscript v has a value ranging from 0 to 10,000;

each R 10 is a hydrogen atom or a monovalent hydrocarbon group;

each R 11 is independently a hydrogen atom, a hydroxyl group, an alkoxy group, or a saccharide group;

each R 12 is independently a monovalent hydrocarbon group;

each R 13 is independently a divalent organic group; and

each R 14 is independently a hydrogen atom or a monovalent hydrocarbon group of 1 to 4 carbon atoms.

4. The composition of claim 1 , where the matrix is non-curable.

5. The composition of claim 1 , where the matrix is curable.

6. The composition of claim 1 , where the reinforcing filler is selected from the group consisting of mica, silica, titanium dioxide, and a combination thereof.

7. A grease composition comprising:

(i) a thermally conductive filler having a surface capable of forming hydrogen bonding with a filler treating agent, wherein the filler is selected from the group consisting of:

aluminum, copper, gold, nickel, palladium, platinum, silver, and alloys thereof;

a particle having a layer on a surface of the particle, where the particles are selected from the group consisting of aluminum, copper, gold, nickel, palladium, platinum, silver, and alloys thereof and the layers are selected from the group consisting of aluminum nitride, aluminum oxide, copper oxide, nickel oxide, silver oxide, and combinations thereof;

a particle comprising a core and an outer surface surrounding the core, where the outer surface is a metal and the core is selected from the group consisting of copper, solid glass, hollow glass, mica, nickel, and ceramic fiber; and

aluminum oxide, beryllium oxide, boron nitride, magnesium oxide, silicon carbide, tungsten carbide, zinc oxide, and combinations thereof, and

(ii) a matrix; where the matrix comprises a polyorganosiloxane capable of hydrogen bonding, where the polyorganosiloxane is free of condensable silyl groups, and the polyorganosiloxane is selected from a saccharide-siloxane polymer having unit formula (I):

(R 1 a R 2 (3-a) SiO 1/2 ) b (R 1 c R 2 (2-c) SiO 2/2 ) d (R 2 SiO 3/2 ) e (R 1 3 SiO 1/2 ) f (R 1 2 SiO 2/2 ) g (R 1 SiO 3/2 ) h (SiO 4/2 ) i ; where

each subscript a is independently 0, 1, 2, or 3;

subscript b is 0 or greater;

each subscript c is independently 0, 1, or 2;

subscript d is 0 or greater;

subscript e is 0 or greater;

if a quantity (a+c) is 0, then subscript e has a value of 1 or greater;

a quantity (b+d+e) is 1 or greater;

subscript f is 0 or greater;

subscript g is 0 or greater;

subscript h is 0 or greater;

subscript i is 0 or greater;

each R 1 can be the same or different and comprises hydrogen, an alkyl group of 1 to 12 carbon atoms, an organic radical, or a group of formula R 3 -Q;

Q comprises an epoxy, cycloepoxy, primary or secondary amino, ethylenediamine, carboxy, halogen, vinyl, allyl, anhydride, or mercapto functionality;

each R 2 has the formula Z-(G 1 ) n -(G 2 ) o , and there is an average of at least one R 2 per polymer molecule;

G 1 is a saccharide component comprising 5 to 12 carbon atoms;

a quantity (n+o) is 1 to 10, and

subscript n or subscript o can be 0;

G 2 is a saccharide component comprising 5 to 12 carbon atoms, and G 2 is additionally substituted with an organic radical or an organosilicon radical;

each Z is a linking group independently selected from the group consisting of

—R 3 —NHC(O)—R 4 —;

—R 3 —NHC(O)O—R 4 —;

—R 3 —NH—C(O)—NH—R 4 —;

—R 3 —C(O)—O—R 4 —;

—R 3 —O—R 4 —;

—R 3 —CH(OH)—CH 2 —O—R 4 —;

—R 3 —S—R 4 —;

—R 3 —CH(OH)—CH 2 —NH—R 4 —;

—R 3 —N(R 1 )—R 4 —;

—NHC(O)—R 4 —;

—NHC(O)O—R 4 —;

—NH—C(O)—NH—R 4 —;

—C(O)—O—R 4 —;

—O—R 4 —;

—CH(OH)—CH 2 —O—R 4 —;

—S—R 4 —;

—CH(OH)—CH 2 —NH—R 4 —;

—N(R 1 )—R 4 —;

—R 3 —NHC(O)—;

—R 3 —NHC(O)O—;

—R 3 —NH—C(O)—NH—;

—R 3 —C(O)—O—;

—R 3 —O—;

—R 3 —CH(OH)—CH 2 —O—;

—R 3 —S—;

—R 3 —CH(OH)—CH 2 —NH—; and

—R 3 —N(R 1 )—;

where each R 3 and each R 4 is independently a divalent spacer comprising a group of formula (R 5 ) r (R 6 ) s (R 7 ) t ,

 where subscripts r, s, and t are each independently 0 or 1, and at least one of r, s and t is 1;

 each R 5 and each R 7 are independently either an alkyl group of 1 to 12 carbon atoms or a group of formula (R 9 O) p , where R 9 is a hydrocarbon group of 1 to 12 carbon atoms, subscript p is an integer ranging from 1 to 50, and each R 9 O may be the same or different and

 R 6 is —N(R 8 )—, where R 8 is hydrogen or an alkyl group of 1 to 12 carbon atoms.

8. The composition of claim 1 , where the filler is selected from the group consisting of aluminum, copper, gold, nickel, palladium, platinum, silver, and alloys thereof; a particle having a layer on a surface of the particle, where the particles are selected from the group consisting of aluminum, copper, gold, nickel, palladium, platinum, silver, and alloys thereof; and the layers are selected from the group consisting of aluminum nitride, aluminum oxide, copper oxide, nickel oxide, silver oxide, and combinations thereof; and a particle comprising a core and an outer surface surrounding the core, where the outer surface is a metal and the core is selected from the group consisting of copper, solid glass, hollow glass, mica, nickel, and ceramic fiber; and aluminum oxide, beryllium oxide, boron nitride, magnesium oxide, silicon carbide, tungsten carbide, zinc oxide, and combinations thereof.

9. The composition of claim 7 , where the matrix comprises a saccharide-siloxane polymer having formula (II): R 2 a R 1 (3-a) SiO—[(R 2 R 1 SiO) j (R 1 2 SiO) k ] m —SiR 1 (3-a) R 2 a ; where

subscript j is an integer with a value ranging from 0 to 10,000;

subscript k is an integer with a value ranging from 0 to 10,000;

subscript m is an integer such that the polymer has a molecular weight less than 1 million.

10. The composition of claim 7 , where the matrix comprises a saccharide-siloxane polymer of formula (III):

where each subscript u is independently 5 to 12;

each subscript v has a value ranging from 0 to 10,000;

each R 10 is a hydrogen atom or a monovalent hydrocarbon group;

each R 11 is independently a hydrogen atom, a hydroxyl group, an alkoxy group, or a saccharide group;

each R 12 is independently a monovalent hydrocarbon group;

each R 13 is independently a divalent organic group; and

each R 14 is independently a hydrogen atom or a monovalent hydrocarbon group of 1 to 4 carbon atoms.

11. The composition of claim 1 , further comprising an additional ingredient selected from the group consisting of (iv) a stabilizer, (v) a plasticizer, (vi), an extender, (vii) an adhesion promoter, (viii) a fungicide, (ix) a rheological additive, (x) a flame retardant, (xi) a pigment, and a combination thereof.

12. A method for preparing a composition comprising:

(1) mixing ingredients comprising

(i) a silicone-containing matrix,

(ii) a thermally conductive filler having a surface capable of forming hydrogen bonding with a filler treating agent, and

(iii) the filler treating agent, the amount of which ranges from 0.1% to 10%, based on the weight of the filler; where the filler treating agent comprises a polyorganosiloxane selected from a saccharide-siloxane polymer capable of hydrogen bonding, wherein the saccharide siloxane polymer has unit formula (I):

(R 1 (3-a) R 2 a SiO 1/2 ) b (R 1 (2-c) R 2 c SiO 2/2 ) d (R 2 SiO 3/2 ) e (R 1 3 SiO 1/2 ) f (R 1 2 SiO 2/2 ) g (R 1 SiO 3/2 ) h (SiO 4/2 ) i ; where

each subscript a is independently 0, 1, 2, or 3;

subscript b has a value of 0 or greater;

each subscript c is independently 0, 1, or 2;

subscript d has a value of 0 or greater;

subscript e has a value of 0 or greater;

if a quantity (a+c) is 0, then subscript e has a value of 1 or greater;

a quantity (b+d+e) is 1 or greater;

subscript f has a value of 0 or greater;

subscript g has a value of 0 or greater;

subscript h has a value of 0 or greater;

subscript i has a value of 0 or greater;

each R 1 can be the same or different and comprises hydrogen, an alkyl group of 1 to 12 carbon atoms, an organic radical, or a group of formula R 3 -Q;

Q comprises an epoxy, cycloepoxy, primary or secondary amino, ethylenediamine, carboxy, halogen, vinyl, allyl, anhydride, or mercapto functionality;

each R 2 has the formula Z-(G 1 ) n -(G 2 ) o , and there is an average of at least one R 2 per polymer molecule;

G 1 is a saccharide component comprising 5 to 12 carbon atoms;

a quantity (n+o) is 1 to 10, and

subscript n or subscript o can be 0;

G 2 is a saccharide component comprising 5 to 12 carbon atoms, and G 2 is additionally substituted with an organic radical or an organosilicon radical;

each Z is a linking group independently selected from the group consisting of

—R 3 —NHC(O)—R 4 —;

—R 3 —NHC(O)O—R 4 —;

—R 3 —NH—C(O)—NH—R 4 —;

—R 3 —C(O)—O—R 4 —;

—R 3 —O—R 4 —;

—R 3 —CH(OH)—CH 2 —O—R 4 —;

—R 3 —S—R 4 —;

—R 3 —CH(OH)—CH 2 —NH—R 4 —;

—R 3 —N(R 1 )—R 4 —;

—NHC(O)—R 4 —;

—NHC(O)O—R 4 —;

—NH—C(O)—NH—R 4 —;

—C(O)—O—R 4 —;

—O—R 4 —;

—CH(OH)—CH 2 —O—R 4 —;

—S—R 4 —;

—CH(OH)—CH 2 —NH—R 4 —;

—N(R 1 )—R 4 —;

—R 3 —NHC(O)—;

—R 3 —NHC(O)O—;

—R 3 —NH—C(O)—NH—;

—R 3 —C(O)—O—;

—R 3 —O—;

—R 3 —CH(OH)—CH 2 —O—;

—R 3 —S—;

—R 3 —CH(OH)—CH 2 —NH—; and

—R 3 —N(R 1 )—;

where each R 3 and each R 4 is independently a divalent spacer comprising a group of formula (R 5 ) r (R 6 ) s (R 7 ) t ,

 where subscripts r, s, and t are each independently 0 or 1, and at least one of r, s and t is 1;

 each R 5 and each R 7 are independently either an alkyl group of 1 to 12 carbon atoms or a group of formula (R 9 O) p , where R 9 is a hydrocarbon group of 1 to 12 carbon atoms, subscript p is an integer ranging from 1 to 50, and each R 9 O may be the same or different and

 R 6 is —N(R 8 )—, where R 8 is hydrogen or an alkyl group of 1 to 12 carbon atoms,

where the polyorganosiloxane is free of condensable silyl groups, thereby treating the filler with the filler treating agent in situ, and

optionally (2) curing the composition, when a curable matrix is used.

13. A method for preparing a composition, comprising:

(1) mixing a thermally conductive filler having a surface capable of forming hydrogen bonding with a filler treating agent, with a solution comprising a solvent and the filler treating agent in the amount of from 0.1% to 10%, based on the weight of the filler, where the filler treating agent comprises a polyorganosiloxane selected from a saccharide-siloxane polymer capable of hydrogen bonding, wherein the saccharide siloxane polymer has unit formula (I):

(R 1 (3-a) R 2 a SiO 1/2 ) b (R 1 (2-c) R 2 c SiO 2/2 ) d (R 2 SiO 3/2 ) e (R 1 3 SiO 1/2 ) f (R 1 2 SiO 2/2 ) g (R 1 SiO 3/2 ) h (SiO 4/2 ) i ; where

each subscript a is independently 0, 1, 2, or 3;

subscript b has a value of 0 or greater;

each subscript c is independently 0, 1, or 2;

subscript d has a value of 0 or greater;

subscript e has a value of 0 or greater;

if a quantity (a+c) is 0, then subscript e has a value of 1 or greater;

a quantity (b+d+e) is 1 or greater;

subscript f has a value of 0 or greater;

subscript g has a value of 0 or greater;

subscript h has a value of 0 or greater;

subscript i has a value of 0 or greater;

each R 1 can be the same or different and comprises hydrogen, an alkyl group of 1 to 12 carbon atoms, an organic radical, or a group of formula R 3 -Q;

Q comprises an epoxy, cycloepoxy, primary or secondary amino, ethylenediamine, carboxy, halogen, vinyl, allyl, anhydride, or mercapto functionality;

each R 2 has the formula Z-(G 1 ) n -(G 2 ) o , and there is an average of at least one R 2 per polymer molecule;

G 1 is a saccharide component comprising 5 to 12 carbon atoms;

a quantity (n+o) is 1 to 10, and

subscript n or subscript o can be 0;

G 2 is a saccharide component comprising 5 to 12 carbon atoms, and G 2 is additionally substituted with an organic radical or an organosilicon radical;

each Z is a linking group independently selected from the group consisting of

—R 3 —NHC(O)—R 4 —;

—R 3 —NHC(O)O—R 4 —;

—R 3 —NH—C(O)—NH—R 4 —;

—R 3 —C(O)—O—R 4 —;

—R 3 —O—R 4 —;

—R 3 —CH(OH)—CH 2 —O—R 4 —;

—R 3 —S—R 4 —;

—R 3 —CH(OH)—CH 2 —NH—R 4 —;

—R 3 —N(R 1 )—R 4 —;

—NHC(O)—R 4 —;

—NHC(O)O—R 4 —;

—NH—C(O)—NH—R 4 —;

—C(O)—O—R 4 —;

—O—R 4 —;

—CH(OH)—CH 2 —O—R 4 —;

—S—R 4 —;

—CH(OH)—CH 2 —NH—R 4 —;

—N(R 1 )—R 4 —;

—R 3 —NHC(O)—;

—R 3 —NHC(O)O—;

—R 3 —NH—C(O)—NH—;

—R 3 —C(O)—O—;

—R 3 —O—;

—R 3 —CH(OH)—CH 2 —O—;

—R 3 —S—;

—R 3 —CH(OH)—CH 2 —NH—; and

—R 3 —N(R 1 )—;

where each R 3 and each R 4 is independently a divalent spacer comprising a group of formula (R 5 ) r (R 6 ) s (R 7 ) t ,

where subscripts r, s, and t are each independently 0 or 1, and at least one of r, s and t is 1;

each R 5 and each R 7 are independently either an alkyl group of 1 to 12 carbon atoms or a group of formula (R 9 O) p ,

where R 9 is a hydrocarbon group of 1 to 12 carbon atoms, subscript p is an integer ranging from 1 to 50, and each R 9 O may be the same or different and

R 6 is —N(R 8 )—, where R 8 is hydrogen or an alkyl group of 1 to 12 carbon atoms,

where the polyorganosiloxane is free of condensable silyl groups

(2) mixing the product of step (1) with an ingredient comprising a silicone-containing matrix, and

optionally (3) removing the solvent.

14. A method for preparing a composition, comprising:

(1) mixing a thermally conductive filler having a surface capable of forming hydrogen bonding with a filler treating agent with a solution comprising a solvent and the filler treating agent in the amount of from 0.1% to 10%, based on the weight of the filler, where the filler treating agent comprises a polyorganosiloxane selected from a saccharide-siloxane polymer capable of hydrogen bonding, wherein the saccharide siloxane polymer has unit formula (I):

(R 1 (3-a) R 2 a SiO 1/2 ) b (R 1 (2-c) R 2 c SiO 2/2 ) d (R 2 SiO 3/2 ) e (R 1 3 SiO 1/2 ) f (R 1 2 SiO 2/2 ) g (R 1 SiO 3/2 ) h (SiO 4/2 ) i ; where

each subscript a is independently 0, 1, 2, or 3;

subscript b has a value of 0 or greater;

each subscript c is independently 0, 1, or 2;

subscript d has a value of 0 or greater;

subscript e has a value of 0 or greater;

if a quantity (a+c) is 0, then subscript e has a value of 1 or greater;

a quantity (b+d+e) is 1 or greater;

subscript f has a value of 0 or greater;

subscript g has a value of 0 or greater;

subscript h has a value of 0 or greater;

subscript i has a value of 0 or greater;

each R 1 can be the same or different and comprises hydrogen, an alkyl group of 1 to 12 carbon atoms, an organic radical, or a group of formula R 3 -Q;

Q comprises an epoxy, cycloepoxy, primary or secondary amino, ethylenediamine, carboxy, halogen, vinyl, allyl, anhydride, or mercapto functionality;

each R 2 has the formula Z-(G 1 ) n -(G 2 ) o , and there is an average of at least one R 2 per polymer molecule;

G 1 is a saccharide component comprising 5 to 12 carbon atoms;

a quantity (n+o) is 1 to 10, and

subscript n or subscript o can be 0;

G 2 is a saccharide component comprising 5 to 12 carbon atoms, and G 2 is additionally substituted with an organic radical or an organosilicon radical;

each Z is a linking group independently selected from the group consisting of

—R 3 —NHC(O)—R 4 —;

—R 3 —NHC(O)O—R 4 —;

—R 3 —NH—C(O)—NH—R 4 —;

—R 3 —C(O)—O—R 4 —;

—R 3 —O—R 4 —;

—R 3 —CH(OH)—CH 2 —O—R 4 —;

—R 3 —S—R 4 —;

—R 3 —CH(OH)—CH 2 —NH—R 4 —;

—R 3 —N(R 1 )—R 4 —;

—NHC(O)—R 4 —;

—NHC(O)O—R 4 —;

—NH—C(O)—NH—R 4 —;

—C(O)—O—R 4 —;

—O—R 4 —;

—CH(OH)—CH 2 —O—R 4 —;

—S—R 4 —;

—CH(OH)—CH 2 —NH—R 4 —;

—N(R 1 )—R 4 —;

—R 3 —NHC(O)—;

—R 3 —NHC(O)O—;

—R 3 —NH—C(O)—NH—;

—R 3 —C(O)—O—;

—R 3 —O—;

—R 3 —CH(OH)—CH 2 —O—;

—R 3 —S—;

—R 3 —CH(OH)—CH 2 —NH—; and

—R 3 —N(R 1 )—;

where each R 3 and each R 4 is independently a divalent spacer comprising a group of formula (R 5 ) r (R 6 ) s (R 7 ) t ,

where subscripts r, s, and t are each independently 0 or 1, and at least one of r, s and t is 1;

each R 5 and each R 7 are independently either an alkyl group of 1 to 12 carbon atoms or a group of formula (R 9 O) p , where R 9 is a hydrocarbon group of 1 to 12 carbon atoms, subscript p is an integer ranging from 1 to 50, and each R 9 O may be the same or different and

R 6 is —N(R 8 )—, where R 8 is hydrogen or an alkyl group of 1 to 12 carbon atoms,

where the polyorganosiloxane is free of condensable silyl groups

(2) removing the solvent, and

(3) mixing the product of step (2) with an ingredient comprising a silicone-containing matrix.

15. A device comprising:

a) an electronic component,

b) a thermal interface material, and

c) a heat spreader;

where the thermal interface material is interposed between the electronic component and the heat spreader along a thermal path extending from a surface of the electronic component to a surface of the heat spreader, where the thermal interface material comprises the composition of claim 1 .

16. The composition of claim 7 , further comprising an additional ingredient selected from the group consisting of (iv) a stabilizer, (v) a plasticizer, (vi), an extender, (vii) an adhesion promoter, (viii) a fungicide, (ix) a rheological additive, (x) a flame retardant, (xi) a pigment, and a combination thereof.

17. A device comprising:

a) an electronic component,

b) a thermal interface material, and

c) a heat spreader;

where the thermal interface material is interposed between the electronic component and the heat spreader along a thermal path extending from a surface of the electronic component to a surface of the heat spreader, where the thermal interface material comprises the composition of claim 7 .