Hybrid thermoplastic gels and their methods of making
View Patent ↗Methods, compositions, and systems are provided for a hybrid thermoplastic gel or sealant. The methods comprise providing (a) a styrenic block copolymer, (b) a Si-vinyl polymer, (c) heat, and optionally (d) an initiator, and reacting the styrenic block copolymer, Si-vinyl polymer, and optional initiator in the presence of the heat to form the hybrid thermoplastic gel. The gel composition may comprise 5-70 wt. % of a styrenic block copolymer, 60-95 wt. % of a Si-vinyl polymer, and 0-10 wt. % of an initiator. A closure or interconnect system may comprise a housing, a cable, and a hybrid thermoplastic gel made by reacting a styrenic block copolymer and a Si-vinyl polymer in the presence of heat.
1. A method of making a hybrid thermoplastic gel comprising:
providing a styrenic block copolymer;
providing a Si-vinyl polymer;
providing heat; and
reacting the styrenic block copolymer and Si-vinyl polymer in the presence of the heat to form a hybrid thermoplastic gel.
2. The method of claim 1 , further comprising providing an initiator to facilitate the reacting of the styrenic block copolymer and the Si-vinyl polymer.
3. The method of claim 2 , wherein the initiator is selected from the group consisting of: peroxides, azobisisobutyronitrile, addition cure compositions, condensation cure compositions, and combinations thereof.
4. The method of claim 2 , wherein the initiator is a peroxide.
5. The method of claim 4 , wherein the peroxide is dicumyl peroxide.
6. The method of claim 1 , further comprising providing at least one additive selected from the group consisting of: flame retardants, coloring agents, adhesion promoters, antioxidants, synergistic antioxidant antiozonant mixtures, stabilizers, clays or other reinforcing particulant fillers, dispersants, flow improvers, rubber particles, silanes, acid scavengers, plasticizers, slip agents, toughening agents, and combinations thereof.
7. The method of claim 1 , wherein the styrenic block copolymer is a copolymer selected from the group consisting of: styrene-isoprene-styrene, styrene-ethylene/butylene-styrene, styrene-ethylene/propylene-styrene, or styrene butadiene styrene.
8. The method of claim 1 , wherein the styrenic block copolymer is a styrene-isoprene-styrene copolymer.
9. The method of claim 1 , wherein the Si-vinyl polymer is vinyl terminated polydimethylsiloxane.
10. The method of claim 1 , wherein the gel comprises one or more of the following properties:
a) a hardness between 80 g and 300 g;
b) a stress relaxation between 20% and 65% when the gel is subjected to a deformation of 50% of its original size;
c) a compression set between 4% and 20% after 50% strain has applied to the gel for 1000 hours at 70° C.; and
d) less than 10% extender bleed out after being under compression of 1.2 atm for 60 days at 60° C.
11. A hybrid thermoplastic gel prepared by mixing a gel composition in the presence of heat, wherein the gel composition comprises:
5-70 wt. % of a styrenic block copolymer;
30-95 wt. % of a Si-vinyl polymer; and
0-10 wt. % of an initiator.
12. The gel of claim 11 , wherein the gel composition comprises:
20-55 wt. % of a styrenic block copolymer;
45-80 wt. % of a Si-vinyl polymer; and
0.01-5 wt. % of an initiator.
13. The gel of claim 11 , wherein the gel composition comprises:
35-50 wt. % of a styrenic block copolymer;
50-65 wt. % of a Si-vinyl polymer; and
0.1-3 wt. % of an initiator.
14. The gel of claim 11 , wherein the gel composition comprises 0.01-10 wt. % of the initiator, and the initiator is selected from the group consisting of:
peroxides, azobisisobutyronitrile, addition cure compositions, condensation cure compositions, and combinations thereof.
15. The gel of claim 14 , wherein the initiator is a peroxide.
16. The gel of claim 15 , wherein the peroxide is dicumyl peroxide.
17. The gel of claim 11 , wherein the gel composition further comprises at least one additive selected from the group consisting of: flame retardants, coloring agents, adhesion promoters, antioxidants, synergistic antioxidant antiozonant mixtures, stabilizers, clays or other reinforcing particulant fillers, dispersants, flow improvers, rubber particles, silanes, acid scavengers, plasticizers, slip agents, toughening agents, and combinations thereof.
18. The gel of claim 11 , wherein the styrenic block copolymer is a copolymer selected from the group consisting of: styrene-isoprene-styrene, styrene-ethylene/butylene-styrene, styrene-ethylene/propylene-styrene, or styrene butadiene styrene.
19. The gel of claim 11 , wherein the styrenic block copolymer is a styrene-isoprene-styrene copolymer.
20. The gel of claim 11 , wherein the Si-vinyl polymer is vinyl terminated polydimethylsiloxane.
21. The gel of claim 11 , wherein the gel comprises one or more of the following properties:
a) a hardness between 80 g and 300 g;
b) a stress relaxation between 20% and 65% when the gel is subjected to a deformation of 50% of its original size;
c) a compression set between 4% and 20% after 50% strain has applied to the gel for 1000 hours at 70° C.; and
d) less than 10% extender bleed out after being under compression of 1.2 atm for 60 days at 60° C.