What is claimed is:
1. A golf tee comprising;
a stick pin the lower end of which is formed in a tapering shape to stick into the ground,
a ball-holding member for a ball placed on top of the stick pin and being tubular with a hollow part inside and having a small hole at the bottom of a hollow part, and
a flexible connecting member the lower end of which is fixed with the stick pin and the upper end of which has a flange, and which can bind the ball-holding member to the stick pin slidably,
wherein the connecting member is inserted into the hollow part through the small hole formed at the bottom of the ball-holding member, and the flanges of the connecting member has notches for letting air pass upward between the flange of said connecting member and the ball-holding member.
2. The golf tee according to claim 1, wherein a plurality of ribs along the axial direction of the ball-holding member are formed at regular intervals on the perimeter, and said ribs are formed so as to protrude from said round loop base.
3. The golf tee according to claim 2, wherein the protrusion length L of the ribs protruding from the ball-holding member is set at a length that does not cause the ribs to deform beyond their plasticity and to become brittle even when the ribs are pressed until the ball enters into contact with the round loop base at the base of the protruding ribs and the ribs are bent radially outward.
4. The golf tee according to claim 1, wherein the top of said stick pin is integrated by injection molding with the lower end of the connecting member.
5. The golf tee according to claim 1, wherein the top of each rib is formed in the shape of a globe.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An elastomeric composition prepared by mixing (a) a polyisocyanate, (b) a curative component and (c) a catalyst consisting essentially of 1,8-diazabicyclo(5,4,0)undec-7-ene at an isocyanate index from 75 to 140; wherein at least 70 percent by weight of the polyisocyanate is a toluene diisocyanate terminated prepolymer containing less than about 2 percent by weight free toluene diisocyanate monomer and the curative component contains compounds having isocyanate-reactive groups, wherein at least 40 percent by weight of the compounds having isocyanate-reactive groups are compounds having at least one hydroxyl group.
2. The composition of claim 1 wherein the polyisocyanate contains less than 1 percent by weight of free toluene diisocyanate monomer.
3. The composition of claim 2 wherein the polyisocyanate contains 0.1 percent or less by weight of free toluene diisocyanate monomer.
4. The process of any of the preceding claims wherein the polyisocyanate comprises greater than 80 percent by weight of a toluene diisocyanate prepolymer.
5. The composition of claim 1 wherein the polyisocyanate contains up to 30 percent by weight of an aromatic diisocyanate other than toluene diisocyanate, and aliphatic polyisocyanate, prepolymers thereof or a mixture thereof.
6. The composition of claim 5 wherein the aromatic isocyanate is polymethylene polyphenylene isocyanates, 2,2, 2,4 or 4,4 isomer of diphenylmethylene diisocyanate or mixtures thereof.
7. The composition of claim 1 wherein at least 50 percent by weight of the compounds having isocyanate-reactive groups are compounds having at least one hydroxyl group.
8. The composition of claim 7 wherein the polyol is a polyester or polyether polyol.
9. The composition of claim 8 wherein the polyol is a polyethyleneoxy polyol, polypropyleneoxy polyol, polybutyleneoxy polyol, or a mixture thereof.
10. The composition of any of the preceding claims wherein the catalyst comprises 0.005 to 2 percent by weight of the total amount of polyol and polyisocyanate components.
11. A process for producing an elastomer having density greater than 0.7 gcm3, comprising mixing a composition of any of the preceding claims in a mold and recovering the produced elastomer.