The present disclosure relates to synthetic polyisoprene elastomeric articles including: one or more cured blend compositions of pre-vulcanized synthetic polyisoprene particles and non-prevulcanized synthetic polyisoprene particles, wherein the pre-vulcanized synthetic polyisoprene particles and the non-prevulcanized synthetic polyisoprene particles are bonded by mono-sulfidic and/or di-sulfidic, and poly-sulfidic crosslinks, wherein the poly-sulfidic crosslinks are present in an amount of 60 to 79 percent of the total amount of crosslinks in the cured blend composition. Methods of making synthetic polyisoprene elastomeric articles such as gloves or condoms is also disclosed.

A near infrared (NIR) laser processable resin based article comprising a specific optothermal converting. The specific optothermal converting has an improved thermal stability and therefore renders the preparation of the resin based article more reliable.

A near infrared (NIR) laser processable resin based article comprising a specific optothermal converting. The specific optothermal converting has an improved thermal stability and therefore renders the preparation of the resin based article more reliable.

The present disclosure relates to synthetic polyisoprene elastomeric articles including: one or more cured blend compositions of pre-vulcanized synthetic polyisoprene particles and non-prevulcanized synthetic polyisoprene particles, wherein the pre-vulcanized synthetic polyisoprene particles and the non-prevulcanized synthetic polyisoprene particles are bonded by mono-sulfidic and/or di-sulfidic, and poly-sulfidic crosslinks, wherein the poly-sulfidic crosslinks are present in an amount of 60 to 79 percent of the total amount of crosslinks in the cured blend composition. Methods of making synthetic polyisoprene elastomeric articles such as gloves or condoms is also disclosed.

The present disclosure relates to synthetic polyisoprene elastomeric articles including: one or more cured blend compositions of pre-vulcanized synthetic polyisoprene particles and non-prevulcanized synthetic polyisoprene particles, wherein the pre-vulcanized synthetic polyisoprene particles and the non-prevulcanized synthetic polyisoprene particles are bonded by mono-sulfidic and/or di-sulfidic, and poly-sulfidic crosslinks, wherein the poly-sulfidic crosslinks are present in an amount of 60 to 79 percent of the total amount of crosslinks in the cured blend composition. Methods of making synthetic polyisoprene elastomeric articles such as gloves or condoms is also disclosed.

An object of the present invention is to provide a golf ball having a low spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) a RAFT agent, (b) the co-crosslinking agent contains an ,-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof, and (d) the RAFT agent is a compound represented by the formula (1):

##STR00001## in the formula (1), R represents a monovalent organic group, and Z represents a monovalent organic group.

A paint composition is provided. The paint composition includes a solvent, a carrier, a pigment, a plurality of copper-containing glass particles, and a thiourea. The paint composition is applied to a substrate as a film and the film exhibits no mold, fungi, or bacterial growth as determined using ASTM 5590.

A high-modulus rubber composition is based on at least a diene elastomer, a reinforcing filler, from 1 to 45 phr of reinforcing resin, from 1 to 10 phr of sulfur, and from 2 to 15 phr of vulcanization accelerator, in which the ratio of the content of sulfur to the content of vulcanization accelerator is less than 0.55.

A high-modulus rubber composition is based on at least a diene elastomer, a reinforcing filler, from 1 to 45 phr of reinforcing resin, from 1 to 10 phr of sulfur, and from 2 to 15 phr of vulcanization accelerator, in which the ratio of the content of sulfur to the content of vulcanization accelerator is less than 0.55.

A cross-linkable rubber composition including a polyether rubber, a cross-linking agent, and calcium hydroxide is provided, the polyether rubber including 0.1 to 30 mol % of a unit represented by the following general formula (1) and 1 to 15 mol % of an unsaturated oxide monomer unit:

##STR00001##

wherein A.sup.+ is a group containing a cationic nitrogen-containing aromatic heterocyclic ring; the group containing a cationic nitrogen-containing aromatic heterocyclic ring bonds to a carbon atom at the position 2 shown in the above general formula (1) through one of nitrogen atoms constituting the cationic nitrogen-containing aromatic heterocyclic ring.