Two-component high gloss semi-permanent water based release agent for polyester substrates

1. A two-part, water-based mold release agent comprising:

a first part comprising a mixture of a silanol-terminated polysiloxane, an organohydride cross-linker, a surfactant and water;

a second part comprising water and a catalyst selected from the group consisting of tin compounds, zinc compounds and hydroxylamine; and

silica, wherein said organohydride cross-linker is structurally different from the silanol-terminated polysiloxane and comprises the structure:

wherein one of R 11 and R 13 is a hydroxyl group and the other of R 11 and R 13 is independently selected from the group consisting of C 1-3 alkyl groups, hydroxyl groups, alkoxy groups, amino groups, hydride and unsaturated organo groups;

R 12 is a C 1-8 saturated alkyl group; and

p is an integer from about 3 to about 500.

2. The two-part, water-based mold release agent of claim 1 , wherein said first part further comprises a copolymer structurally different from the silanol-terminated polysiloxane, the copolymer comprising the structure:

wherein R, R 1 and R 2 are the same or different, and are independently selected from C 1-8 saturated alkyl groups;

R 3 and R 4 are the same or different, and are independently selected from hydroxyl groups and alkoxy groups; and

the ratio of s to t is about 10s to 1t to about 1s to 10t.

3. The two-part, water-based mold release agent of claim 2 , wherein said copolymer has a molecular weight from about 1,500 to about 500,000.

4. The two-part, water-based mold release agent of claim 1 , further comprising a slip agent structurally different from the silanol-terminated polysiloxane.

5. The two-part, water-based mold release agent of claim 4 , wherein said slip agent comprises the structure:

wherein R 5 and R 6 are the same or different and are independently selected from the group consisting of C 1-4 alkyl groups, C 1-4 alkoxyl groups, hydroxyl groups, hydrides, carbinol groups, acryloxy groups, acetoxy groups, aminopropyl groups and amino groups;

R 7 , R 8 , R 9 , and R 10 are the same or different and are independently selected from the group consisting of C 1-6 alkyl groups;

Y are selected from the group consisting of amino groups and hydrogen;

v is an integer from 1 to about 50,000; and

w is an integer from 1 to about 200.

6. The two-part, water-based mold release agent of claim 1 , wherein said first part further comprises a surfactant, wherein said surfactant is selected from the group consisting of anionic surfactants, cationic surfactants and non-ionic surfactants.

7. The two-part, water-based mold release agent of claim 1 , wherein said first part further comprises:

a copolymer structurally different from the silanol-terminated polysiloxane, the copolymer comprising the structure:

wherein R, R 1 and R 2 are the same or different, and are independently selected from C 1-8 saturated alkyl groups;

R 3 and R 4 are the same or different, and are independently selected from silanol groups and alkoxy groups; and

the ratio of s to t is about 10s to it to about 1s to 10t; and

a slip agent structurally different from the silanol-terminated polysiloxane and structurally different from the copolymer.

8. The two-part, water-based mold release agent of claim 1 , wherein the silanol-terminated polysiloxane comprises the structure:

wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently selected from C 1-6 alkyl groups and C 1-6 fluorinated alkyl groups, n is an integer from 1 to about 3,000.

9. A two-part, water-based mold release agent comprising:

a first part comprising a mixture of a silanol-terminated polysiloxane, an organohydride cross-linker, a surfactant and water;

a second part comprising water and a catalyst selected from the group consisting of tin compounds, zinc compounds and hydroxylamine; and

silica, wherein said organohydride cross-linker is structurally different from the silanol-terminated polysiloxane and comprises the structure:

wherein R 11 and R 13 are each hydroxyl groups;

R 12 is a C 1-8 saturated alkyl group; and

p is an integer from about 3 to about 500.

10. A two-part, water based mold release agent comprising:

a first part comprising an aqueous mixture of:

silanol-terminated polysiloxane having the structure:

wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently selected from C 1-6 alkyl groups and C 1-6 fluorinated alkyl groups, n is an integer from 1 to about 3,000;

an organohydride cross-linker is structurally different from the silanol-terminated polysiloxane and has the structure:

wherein one of R 11 and R 13 is a hydroxyl group and the other of R 11 and R 13 is independently selected from the group consisting of C 1-3 alkyl groups, hydroxyl groups, alkoxy groups, amino groups, hydride and unsaturated organo groups,

R 12 is a C 1-8 saturated alkyl group,

p is an integer from about 3 to about 50;

surfactant;

water; and

a second part comprising a catalyst.

11. The two-part, water based mold release agent of claim 10 , wherein the first part further comprises a copolymer structurally different from the silanol-terminated polysiloxane, the copolymer comprising the structure:

wherein R, R 1 and R 2 are the same or different, and are independently selected from C 1-8 saturated alkyl groups,

R 3 and R 4 are the same or different, and are independently selected from hydroxyl groups and alkoxy groups, and

the ratio of s to t is about 10s to 1t to about 1s to 10t.

12. The two-part, water based mold release agent of claim 10 , further comprising a slip agent structurally different from the silanol-terminated polysiloxane.

13. The two-part, water based mold release agent of claim 10 , wherein the second part further comprises a surfactant.

14. The two-part, water based mold release agent of claim 10 , wherein at least one of the first part or second part further comprises silica.