1. A golf ball comprising at least a core layer and a cover layer wherein said core layer and said cover layer each comprises a cross-linked thermoset rubber composition, wherein the primary rubber component of said core layer is different than the primary rubber component of said cover layer, and wherein at least one of the layers in the golf ball is a moisture vapor barrier layer that has a moisture vapor transmission rate of less than about 0.95 grams\xb7mm(m2\xb7day).
2. The golf ball of claim 1, wherein the primary rubber component of said core layer or said cover layer is chosen from polybutadienes (PBR), polydienes, polyethylenes (PE), ethylene-propylene copolymers (EP), ethylene-butylene copolymers, polyisoprenes, polystyrenebutadienes, polyethylenebutadienes, styrene-propylene-diene rubbers, ethylene-propylene-diene terpolymers (EPDM), fluorinated polymers, and blend of one or more thereof.
3. The golf ball of claim 1, wherein the primary rubber component of said core layer is high cis-polybutadiene and the primary rubber component of said cover layer is low cis-polybutadiene.
4. The golf ball of claim 1, wherein the thermoset rubber composition further comprises at least one compound chosen from antioxidants, antiozonants, light stabilizers, UV absorbers, moisture scavengers, photoinitiators, silane crosslinkers, colorants, fillers, fibers, flakes, metal oxides, zinc oxide, zinc stearate, microparticles and specific gravity reducing agents.
5. The golf ball of claim 1, wherein the thermoset rubber composition of the moisture vapor barrier layer further comprises microparticles that create a tortuous path across the moisture vapor barrier layer, and wherein the microparticles comprise fibers, whiskers, metal flakes, micaceous particles, or nanoparticles.
6. The golf ball of claim 5, wherein the microparticles comprise leafing or non-leafing flakes of aluminum, iron oxide, copper, or bronze.
7. The golf ball of claim 1, wherein the golf ball further comprises an intermediate layer, and wherein the intermediate layer is the moisture vapor barrier layer.
8. A golf ball comprising a core layer, a cover layer, and at least one intermediate layer disposed between the core and the cover, wherein said core layer, said cover layer, and said at least one intermediate layer each comprises a cross-linked thermoset rubber composition, wherein the primary rubber component comprises a polybutadiene, a crosslinking initiator, and optionally at least one other rubber component in an amount less than that of the primary rubber component;
wherein the relative cis-1,4-polybutadiene content of the core layer (\u03b4cr), the intermediate layer (\u03b4im), and the cover layer (\u03b4cv) is represented by the mathematical expression \u03b4cr\u2267\u03b4im\u2267\u03b4cv.
9. The golf ball of claim 8, wherein the relative trans-1,4-polybutadiene content of the cover layer (\u03b5cv), the intermediate layer (\u03b5im), and the core layer (\u03b5cr) is represented by the mathematical expression \u03b5cv\u2267\u03b5im\u2267\u03b5cr.
10. The golf ball of claim 8, wherein \u03b4cr is at least about 90% cis-1,4-polybutadiene.
11. The golf ball of claim 8, where \u03b5cv is at least about 50% trans-1,4-polybutadiene.
12. The golf ball of claim 8, wherein at least one of the layers in the golf ball has a moisture vapor transmission rate of less than about 0.95 grams\xb7mm(m2\xb7day).
13. The golf ball of claim 8, wherein the thermoset rubber composition further comprises at least one compound chosen from antioxidants, antiozonants, light stabilizers, UV absorbers, moisture scavengers, photoinitiators, silane crosslinkers, colorants, fillers, fibers, flakes, metal oxides, zinc oxide, zinc stearate, microparticles and specific gravity reducing agents.
14. The golf ball of claim 8, wherein the intermediate layer or cover layer has a specific gravity of at least about 1.2
15. The golf ball of claim 8, wherein the intermediate layer or cover layer has a specific gravity of less than about 1.0.
16. The golf ball of claim 8, wherein the crosslinking initiator is chosen from di-t-amyl peroxide, di-t-butyl peroxide, t-butyl cumyl peroxide, di-cumyl peroxide, di(2-t-butylperoxyisopropyl)benzene, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, 2,5-dimethyl-2,5-di(t-butylperoxy)hexyne-3, 1,1-di(t-butylperoxy)-3,3,5-trimethylcyclohexane, 4,4-di(t-butylperoxy)-n-butylvalerate, and mixtures thereof.
17. The golf ball of claim 8, wherein the thermoset rubber composition further comprises a cis-to-trans catalyst wherein the cis-to-trans catalyst comprises an organosulfur compound, metal-containing organosulfur compound, a substituted or unsubstituted aromatic organic compound that does not contain sulfur or metal, an inorganic sulfide compound, an aromatic organometallic compound, an element from Group VIA, or a combination thereof.
18. The golf ball of claim 17, wherein the organosulfur compound comprises pentachlorothiolphenol (PCTP) or a metal salt thereof.
19. The golf ball of claim 8, wherein the thermoset rubber composition further comprises a co-crosslinking agent.
20. The golf ball of claim 19, wherein the co-crosslinking agent is chosen from monofunctional, difunctional, and polyfunctional unsaturated carboxylate metallic compounds, polyesters of unsaturated carboxylic acids, polyamides of unsaturated carboxylic acids, esteramides of unsaturated carboxylic acids, bismaleimides, allyl esters of cyanurates, allyl esters of isocyanurates, allyl esters of aromatic acids, liquid vinyl polydienes, mono- and polyunsaturated polycarboxylic acids, anhydrides of mono- and polyunsaturated polycarboxylic acids, monoesters and polyesters of mono- and polyunsaturated polycarboxylic acids, monoamides and polyamides of mono- and polyunsaturated polycarboxylic acids, esteramides and polyesteramides of mono- and polyunsaturated polycarboxylic acids, and mixtures thereof.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A structure of a cotton bud head comprising:
a head body made from silica gel material, said head body being soft and having a smooth surface, said body having a center formed with a stepped storage cavity;
an external ring seat mounted on an external ring surface at a bottom end of said head body;
an inner ring seat mounted on an inner ring surface at said bottom end of said head body;
a storage tube having an upper end mounted on said external ring seat for containing liquid cosmetic material;
a guiding rod inserted into said storage cavity of said head body and having a lower end fitted between a plurality of ribs which are mounted on a bottom seat, one end of the bottom seat being tubular and being directly inserted to said inner ring seat thereby enabling said liquid cosmetic material to flow to said storage cavity, said guiding rod having a conical head which slightly touch an outlet of said stepped storage cavity.