Provided is a tire comprising a tread formed of a rubber composition comprising a rubber component comprising 0 to 50% by mass of an isoprene-based rubber, wherein the tire satisfies the following conditions (1) to (6): (1) when a tan δ at 30° C. (tan δ.sub.30° C.) is A, A≥0.12, (2) when a ratio (EB.sub.80° C./EB.sub.23° C.) of an elongation at break at 80° C. (EB.sub.80° C.) to an elongation at break at 23° C. (EB.sub.23° C.) is B, 0.60≤B≤1.00, and (3) when an abrasion resistance index with a tire of Comparative example 1 being 100 as measured by a LAT tester is C, 110≤C≤140, (4) when a ratio (LAND.sub.Sh/LAND.sub.Cr) of a land ratio of the entire pair of shoulder parts (LAND.sub.Sh) to a land ratio of the crown part (LAND.sub.Cr) is D, 0.80≤D≤2.00, (5) when a maximum groove depth of the circumferential main groove is E (mm), 5≤E≤20, and

[00001]$\begin{array}{cc}25\le \left(B\times C/A\right)\times \left(D/E\right)\le 200.& \left(6\right)\end{array}$

Provided is a tire comprising a tread formed of a rubber composition comprising a rubber component comprising 0 to 50% by mass of an isoprene-based rubber, wherein the tire satisfies the following conditions (1) to (6): (1) when a tan δ at 30° C. (tan δ.sub.30° C.) is A, A≥0.12, (2) when a ratio (EB.sub.80° C./EB.sub.23° C.) of an elongation at break at 80° C. (EB.sub.80° C.) to an elongation at break at 23° C. (EB.sub.23° C.) is B, 0.60≤B≤1.00, and (3) when an abrasion resistance index with a tire of Comparative example 1 being 100 as measured by a LAT tester is C, 110≤C≤140, (4) when a ratio (LAND.sub.Sh/LAND.sub.Cr) of a land ratio of the entire pair of shoulder parts (LAND.sub.Sh) to a land ratio of the crown part (LAND.sub.Cr) is D, 0.80≤D≤2.00, (5) when a maximum groove depth of the circumferential main groove is E (mm), 5≤E≤20, and

[00001]$\begin{array}{cc}25\le \left(B\times C/A\right)\times \left(D/E\right)\le 200.& \left(6\right)\end{array}$

The present invention relates to a crosslinking agent for polymeric systems, which crosslinking agent comprises elemental sulfur, phenolic resin, thiazole disulfide compounds and metal salts based on thiocarbamates, and to the use thereof in vehicle manufacture.

The present invention relates to a crosslinking agent for polymeric systems, which crosslinking agent comprises elemental sulfur, phenolic resin, thiazole disulfide compounds and metal salts based on thiocarbamates, and to the use thereof in vehicle manufacture.

A sulfur-modified chloroprene polymer latex includes an emulsifier and a sulfur-modified chloroprene polymer obtained by modifying a chloroprene polymer (A) with sulfur (B), wherein the sulfur amount Y in the sulfur-modified chloroprene polymer and the z-average particle size X of the sulfur-modified chloroprene polymer satisfy formulae (1) to (3) (formula (1): 0.10<Y<0.60; formula (2): 120<X<320; and formula (3): Y<0.0025X−0.20), the total amount of a chloroprene monomer (A-1) and a monomer (A-2) copolymerizable with the chloroprene monomer which constitute the chloroprene polymer is 100 parts by mass, the amount of sulfur (B) contained in the sulfur-modified chloroprene polymer is Y parts by mass, and the z-average particle size of the sulfur-modified chloroprene polymer is X nm. The sulfur-modified chloroprene polymer latex composition can also include a metal oxide (C), a cross-linking accelerator (D), and an antioxidant (E).

A sulfur-modified chloroprene polymer latex includes an emulsifier and a sulfur-modified chloroprene polymer obtained by modifying a chloroprene polymer (A) with sulfur (B), wherein the sulfur amount Y in the sulfur-modified chloroprene polymer and the z-average particle size X of the sulfur-modified chloroprene polymer satisfy formulae (1) to (3) (formula (1): 0.10<Y<0.60; formula (2): 120<X<320; and formula (3): Y<0.0025X−0.20), the total amount of a chloroprene monomer (A-1) and a monomer (A-2) copolymerizable with the chloroprene monomer which constitute the chloroprene polymer is 100 parts by mass, the amount of sulfur (B) contained in the sulfur-modified chloroprene polymer is Y parts by mass, and the z-average particle size of the sulfur-modified chloroprene polymer is X nm. The sulfur-modified chloroprene polymer latex composition can also include a metal oxide (C), a cross-linking accelerator (D), and an antioxidant (E).

A mixture can be used for modifying the rheology of polymeric substrates. The mixture contains a hydroxylamine ester and an isocyanate functionalized with a thio compound.

A mixture can be used for modifying the rheology of polymeric substrates. The mixture contains a hydroxylamine ester and an isocyanate functionalized with a thio compound.

A synthetic polyisoprene latex emulsion has pre-vulcanization composition and post vulcanization composition. The pre-vulcanization composition comprises insoluble amorphous sulfur extracted with zinc dithiocarbamate catalyst at 20° C. to form sulfur chain and transported to interior of synthetic polyisoprene particle forming physical attachment of sulfur to active sites. The degree of pre-vulcanization is verified by expansion of cast and dried film of latex in toluene in 20 minutes by means of a swelling index test. The latex emulsion is vulcanized at 90° C. to 120° C. for 3 to 5 minutes. Post-vulcanization composition with accelerators crosslink between synthetic polyisoprene particles, uniformly curing both in the inter-particle and intra-particle regions to produce high cross link density, uniform distribution of double bonds with zinc segregation at the boundaries of original particles. The condom exhibits high tensile strength, tensile modulus, elongation with excellent tear strength releasing below 10 ppb of nitrosamines.

A synthetic polyisoprene latex emulsion has pre-vulcanization composition and post vulcanization composition. The pre-vulcanization composition comprises insoluble amorphous sulfur extracted with zinc dithiocarbamate catalyst at 20° C. to form sulfur chain and transported to interior of synthetic polyisoprene particle forming physical attachment of sulfur to active sites. The degree of pre-vulcanization is verified by expansion of cast and dried film of latex in toluene in 20 minutes by means of a swelling index test. The latex emulsion is vulcanized at 90° C. to 120° C. for 3 to 5 minutes. Post-vulcanization composition with accelerators crosslink between synthetic polyisoprene particles, uniformly curing both in the inter-particle and intra-particle regions to produce high cross link density, uniform distribution of double bonds with zinc segregation at the boundaries of original particles. The condom exhibits high tensile strength, tensile modulus, elongation with excellent tear strength releasing below 10 ppb of nitrosamines.