Puncture sealant for a tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsKunio Kageyama, Shigeo Omote, Youichi Taguchi, Hazime Yamazaki
Life of this patent
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Abstract
A cured puncture sealant for a tire which comprises (1) either a copolymer of at least one acrylate selected from 2-ethylhexyl acrylate and n-butyl acrylate, and a glycidyl monomer, or a copolymer of at least one of the above acrylates, a glycidyl monomer, and at least one other acrylic monomer, and (2) a curing agent for epoxy resin. The sealant may optionally further include a polymer whose solubility parameter to the above copolymer is in the range of .+-.0.5. The sealant is most effective as a puncture sealant for a tubeless tire.
Claims8
In a combination of a tire and a cured puncture sealant layer on an inner surface of said tire, the improvement comprising:
- said cured puncture sealant comprising (A) a copolymer of at least one acrylate selected from the group consisting of 2-ethylhexyl acrylate and n-butyl acrylate, and at least one glycidyl monomer, the amount of said glycidyl monomer being 0.5-5 parts by weight to 100 parts by weight of said acrylate, (B) a curing agent for epoxy resin, and (C) a polymer whose solubility parameter to the copolymer is within .+-.0.5 in an amount up to 200 parts by weight to 100 parts by weight of said copolymer, said cured puncture sealant exhibiting an elongation at break of 500 to 2000% and a tensile strength of 0.7 to 5.0 kg/cm.sup.2.
The combination comprising a sealed rubber product and a cured puncture sealant layer on an inner surface of said product, said sealant comprising (A) a copolymer of at least one acrylate selected from the group consisting of 2-ethylhexyl acrylate and n-butyl acrylate, and at least one glycidyl monomer the amount of said glycidyl monomer being 0.5-5 parts by weight to 100 parts by weight of said acrylate, (B) a curing agent for epoxy resin, and (C) a polymer whose solubility parameter to the copolymer is within .+-.0.5 in an amount up to 200 parts by weight to 100 parts by weight of said copolymer, said cured puncture sealant exhibiting an elongation at break of 500 to 2000% and a tensile strength of 0.7 to 5.0 kg/cm.sup.2.
Dependencies are inferred from the claim text.