Silicone protective coating
A silicone polymer gel/coating which can be sprayed from an aerosol can preferably has a viscosity of 2,000–5,000 cps. and provides a moisture resistant coating of preferably 20–30 mils to protect components in telephone installation and maintenance applications. It is preferably sprayed from a can using Spray Actuator OTP 0025.
1. A silicone composition which can be sprayed from an aerosol can to form a gel, comprising:
about 10–30% by weight of a silanol polymer;
about 2.85–11.8% by weight of a cross linker;
about 0.01–1.0% by weight of a catalyst; and
about 55–80% by weight of a solvent, wherein:
the silanol polymer is at least one selected from the group consisting of α,ω-dihydroxy dimethlypolysiloxane silicone polymer, α,ω-dihydroxy dialkylpolysiloxane polymer, α,ω-di/trimethoxy dimethylpolysiloxane polymer, and α,ω-dihydroxy dimethyl diphenylpolysiloxane polymer;
and the cross linker comprises methyl tris-(2-butanone oxime)silane, vinyl tris-(2-butanoneoxime)silane, and tetra(2-butanone oxime)silane.
2. The composition of claim 1 , wherein the composition has a viscosity of about 2,000–5,000 cps.
3. A spray-on moisture resistant coating produced by using the composition of claim 1 .
4. The composition of claim 1 , wherein the composition sprays on as a liquid and catalyzes to a gel.
5. The composition of claim 1 , wherein the gel has a dielectric constant of about 2.0–4.0 @ 100 Hz.
6. The composition of claim 1 , wherein the gel has a dielectric constant of not more than 3.7 @ 100 Hz.
7. The composition of claim 1 , wherein the composition is air cured.
8. The composition of claim 1 , wherein the silanol polymer is a silanol of a dialkyl polysiloxane polymer and/or a silanol of a diphenyl polysiloxane polymer.
9. Apparatus including:
an aerosol can; and
the composition of claim 1 in the aerosol can.
10. The apparatus of claim 9 , wherein the aerosol can has a foaming dispensary.
11. The apparatus of claim 10 , wherein the foaming dispensary is a spray actuator.
12. The apparatus of claim 9 , further comprising a propellant.
13. The apparatus of claim 12 , wherein the propellant is mixed with the composition such that the composition is 70–90% by weight and the propellant is 10–30% by weight.
14. A spray-on moisture resistant coating produced by using the apparatus of claim 9 .
15. The apparatus of claim 9 , wherein the aerosol can is flushed with nitrogen prior to filling.
16. A method of providing a moisture resistant coating, comprising using the apparatus of claim 9 to spray a coating onto an object to be protected.
17. A method of providing a moisture resistant coating, comprising spraying the composition of claim 1 onto an object to be protected.
18. The method of claim 17 , wherein the object to be protected is wiring.
19. The method of claim 17 , wherein the object to be protected is an electrical connection.
20. A spray-on moisture resistant coating produced by the method of claim 17 .
21. The method of claim 17 , wherein the moisture resistant coating is applied to an object selected from the group consisting of: telephone pedestals, the wiring of telephone pedestals, the connecting blocks of telephone pedestals, splices, joints, and other electrical connecting devices that are subject to environmental conditions.
22. The coating of claim 20 , wherein the coating is about 1–125 mils thick.
23. The coating of claim 22 , wherein the coating is about 10–40 mils thick.
24. The coating of claim 23 , wherein when sprayed onto a surface, the composition provides a moisture resistant is coating is about 20–30 mils thick.
25. A silicone composition which can be sprayed from an aerosol can to form a gel, comprising:
about 10–30% by weight of a silanol polymer;
about 2.85–11.8% by weight of a cross linker;
about 0.01–1.0% by weight of a catalyst; and
about 55–80% by weight of a solvent, wherein:
the silanol polymer is at least one from the group consisting of α, ω-dihydroxy dimethyl polysiloxane silicone polymer, α, ω-dihydroxy dialkyl polysiloxane polymer, α, ωdi/trimethoxy dimethyl polysiloxane polymer, and α, ω-dihydroxy dimethyl diphenyl polysiloxane polymer;
the cross linker is at least one from the group consisting of methyl tris-(2-butanone oxime) silane, vinyl tris-(2-butanoneoxime) silane, tetra(2-butanone oxime) silane, and methyl trialkoxy silane;
the catalyst is at least one from the group consisting of dibutyl tin dilaurate, dibutyl tin diacetate, and dibutyl tin dioleate; and
the solvent is pentane.
26. A silicone composition which can be sprayed from an aerosol can to form a gel, comprising:
20–22% by weight 4,000 cps. viscosity dihydroxy dimethyl polysiloxane;
3.0–5.0% by weight methyl tris-(2-butanone oxime) silane;
1.5–2.5% by weight vinyl tris-(2-butanone oxime) silane;
0.6–1.3% by weight tetra-(2-butanone oxime) silane in toluene;
0.01–0.02% by weight dibutyl tin diacetate;
25.20% by weight dimethyl ether; and
pentane in an amount to make 100% by weight.
27. The composition of claim 26 , comprising:
20–22% by weight 4,000 cps. viscosity dihydroxy dimethyl polysiloxane;
3.8–4.2% by weight methyl tris-(2-butanone oxime) silane;
1.85–2.15% by weight vinyl tris-(2-butanone oxime) silane;
0.90–1.10% by weight tetra-(2-butanone oxime) silane in toluene;
0.01–0.02% by weight dibutyl tin diacetate;
25.20% by weight dimethyl ether; and
pentane in an amount to make 100% by weight.
28. The composition of claim 26 , comprising:
21.00% by weight 4,000 cps. viscosity dihydroxy dimethyl polysiloxane;
4.00% by weight methyl tris-(2-butanone oxime) silane;
2.00% by weight vinyl tris-(2-butanone oxime) silane;
1.00% by weight tetra-(2-butanone oxime) silane in toluene;
0.015% by weight dibutyl tin diacetate;
25.20% by weight dimethyl ether; and
46.785% by weight pentane.