A vulcanized rubber is formed by a method comprising blending a halogenated unsaturated polymer into a rubber comprised of cis 1-4 polyisoprene to form a vulcanizable polymer blend, adding a vulcanization material to the vulcanizable polymer blend, and vulcanizing the vulcanizable polymer blend to form a homogeneous vulcanized rubber. The method may be used to form a vulcanized rubber comprised of polyisoprene uniformly crosslinked with a halogenated unsaturated polymer that is a reaction product of (i) an unsaturated polymer miscible with polyisoprene and having conjugated dienes that undergo a Diels Alder reaction and (ii) a polyhalogenated cyclopentadiene.

This disclosure is to provide a method of manufacturing a rubber composition comprising kneading a rubber composition that includes 100 parts by mass (pbm) of a rubber component (A) including 50 mass % or more of natural rubber, 5-50 pbm of at least one kind of thermoplastic resin (B) selected from among C5-based resins, C5-C9-based resins, C9-based resins, terpene-based resins, terpene-aromatic compound-based resins, rosin-based resins, dicyclopentadiene resins, and alkylphenol-based resins; 20-120 pbm of a filler (C) including silica; at least one kind of vulcanization accelerator (D) selected from among guanidines, sulfenamides, thiazoles, thiourea and diethyl thiourea; a silane coupling agent (E); and a vulcanizing agent (F). The kneading comprises a kneading stage A for kneading components (A)-(C), part or all of component (D), and 2 pbm or more of component (E), and a kneading stage B for kneading component (F) with a kneaded product of the kneading stage A.

This disclosure is to provide a method of manufacturing a rubber composition comprising kneading a rubber composition that includes 100 parts by mass (pbm) of a rubber component (A) including 50 mass % or more of natural rubber, 5-50 pbm of at least one kind of thermoplastic resin (B) selected from among C5-based resins, C5-C9-based resins, C9-based resins, terpene-based resins, terpene-aromatic compound-based resins, rosin-based resins, dicyclopentadiene resins, and alkylphenol-based resins; 20-120 pbm of a filler (C) including silica; at least one kind of vulcanization accelerator (D) selected from among guanidines, sulfenamides, thiazoles, thiourea and diethyl thiourea; a silane coupling agent (E); and a vulcanizing agent (F). The kneading comprises a kneading stage A for kneading components (A)-(C), part or all of component (D), and 2 pbm or more of component (E), and a kneading stage B for kneading component (F) with a kneaded product of the kneading stage A.

The present invention includes a hydrogel and a method of making a porous hydrogel by preparing an aqueous mixture of an uncrosslinked polymer and a crystallizable molecule; casting the mixture into a vessel; allowing the cast mixture to dry to form an amorphous hydrogel film; seeding the cast mixture with a seed crystal of the crystallizable molecule; growing the crystallizable molecule into a crystal structure within the uncrosslinked polymer; crosslinking the polymer around the crystal structure under conditions in which the crystal structure within the crosslinked polymer is maintained; and dissolving the crystals within the crosslinked polymer to form the porous hydrogel.

The present invention includes a hydrogel and a method of making a porous hydrogel by preparing an aqueous mixture of an uncrosslinked polymer and a crystallizable molecule; casting the mixture into a vessel; allowing the cast mixture to dry to form an amorphous hydrogel film; seeding the cast mixture with a seed crystal of the crystallizable molecule; growing the crystallizable molecule into a crystal structure within the uncrosslinked polymer; crosslinking the polymer around the crystal structure under conditions in which the crystal structure within the crosslinked polymer is maintained; and dissolving the crystals within the crosslinked polymer to form the porous hydrogel.

The present invention is directed to a plug for sealing a puncture in a tyre, whereby the plug comprises a head portion and a tail portion, the head portion comprising: a porous material that comprises open pores and capable of absorbing >0.02 grams of water per gram of porous material; and an accelerant selected from the group consisting of a salt, a polar solvent, an acid, and any combinations thereof, wherein the accelerant is retained in the pores of the porous material and is configured to react on contact with a curable sealant selected from the group consisting of anionic stabilized sealants, steric stabilized sealants and anionic colloidal dispersions thereby reducing curing time of the sealant, and wherein the porous material does not comprise the sealant.

The present invention provides a method for producing natural rubber with which the odors of solid natural rubber is easily reduced, and further which does not degrade physical properties such as heat aging resistance. The present invention relates to a method for producing natural rubber, the method including a sheeting step including sheeting a non-deproteinized solid natural rubber to form a natural rubber sheet, the natural rubber sheet having a moisture content of 20% or less.

The present invention includes a hydrogel and a method of making a porous hydrogel by preparing an aqueous mixture of an uncrosslinked polymer and a crystallizable molecule; casting the mixture into a vessel; allowing the cast mixture to dry to form an amorphous hydrogel film; seeding the cast mixture with a seed crystal of the crystallizable molecule; growing the crystallizable molecule into a crystal structure within the uncrosslinked polymer; crosslinking the polymer around the crystal structure under conditions in which the crystal structure within the crosslinked polymer is maintained; and dissolving the crystals within the crosslinked polymer to form the porous hydrogel.

The invention relates to a process for producing a vulcanizable composite material, comprising the steps of: a) producing or providing a textile strength member, b) treating the textile strength member with an aqueous dispersion for adhesive activation of the textile strength member and to obtain an adhesion-activated textile strength member and c) introducing the adhesion-activated textile strength member into a crosslinkable rubberization mixture to obtain the vulcanizable composite material, wherein the aqueous dispersion is essentially free of free resorcinol and resorcinol precondensates, especially resorcinol-formaldehyde precondensates, and is free of free formaldehyde and formaldehyde-releasing substances, wherein the crosslinkable rubberization mixture is processible by vulcanization to give a crosslinked rubberization mixture which is at least partly transmissive to visible light at least in sections.

The invention relates to a process for producing a vulcanizable composite material, comprising the steps of: a) producing or providing a textile strength member, b) treating the textile strength member with an aqueous dispersion for adhesive activation of the textile strength member and to obtain an adhesion-activated textile strength member and c) introducing the adhesion-activated textile strength member into a crosslinkable rubberization mixture to obtain the vulcanizable composite material, wherein the aqueous dispersion is essentially free of free resorcinol and resorcinol precondensates, especially resorcinol-formaldehyde precondensates, and is free of free formaldehyde and formaldehyde-releasing substances, wherein the crosslinkable rubberization mixture is processible by vulcanization to give a crosslinked rubberization mixture which is at least partly transmissive to visible light at least in sections.