The present invention relates to a process of a process for preparation of a polymer dispersion comprising a step (E) of free radical polymerization in an aqueous medium (M) in the presence of: at least a pre-polymer (pO) soluble in the medium (M), at least one free-radical polymerization initiator, and at least one ethylenically unsaturated hydrophobic monomer (m) which is chosen from an alkyl (meth)acrylate of at least C6, wherein the aqueous medium (M) includes water and at least one water miscible solvent.

The present invention relates to a process of a process for preparation of a polymer dispersion comprising a step (E) of free radical polymerization in an aqueous medium (M) in the presence of: at least a pre-polymer (pO) soluble in the medium (M), at least one free-radical polymerization initiator, and at least one ethylenically unsaturated hydrophobic monomer (m) which is chosen from an alkyl (meth)acrylate of at least C6, wherein the aqueous medium (M) includes water and at least one water miscible solvent.

A latex composition for dip molding includes a carboxylic acid-modified nitrile-based copolymer latex having pKa of 9.5 to 10.2 and satisfying General Formulas 1 and 2.

0.85≤P≤1.0, P=CV.sub.D/CV.sub.0  [General Formula 1]

5≤M≤20, M=m.sub.1×m.sub.2  [General Formula 2] wherein CV.sub.0 represents a capillary viscosity which is measured in a swollen in a methyl ethyl ketone solvent, CV.sub.D represents a capillary viscosity in a deswollen state, m.sub.1 represents an insolubility of a dried film in the methyl ethyl ketone solvent, and m.sub.2 represents a swelling index of the dried film in the methyl ethyl ketone solvent, wherein a carboxylic acid-modified nitrile-based copolymer of carboxylic acid-modified nitrile-based copolymer latex includes: a conjugated diene-based monomer-derived unit, an ethylenic unsaturated nitrile-based monomer-derived unit, and an ethylenic unsaturated acid monomer-derived unit. A molded article having a layer derived from the latex composition is also provided.

Thermally vulcanisable, meltable adhesives and processes have a meltable polybutadiene-polyurethane, ground sulphur and optionally at least one vulcanisation accelerator, at least one filling material, at least one epoxide resin, at least one tackifier resin, bitumen, at least one softener and further auxiliary and additive materials, wherein said adhesives and processes can be thermally vulcanised within a temperature range of 130° C. to 230° C., such that same, as well as an adhesive strip produced from same, can be used for adhesion and/or sealing in the automotive industry, as well as in structural work on oiled sheet metal, and in the painting line on e-coated or otherwise painted sheet metal, for example, for crimp fold adhesion, for crimp fold sealing, for seam sealing, for lining adhesion, for hole closure and much more.

Thermally vulcanisable, meltable adhesives and processes have a meltable polybutadiene-polyurethane, ground sulphur and optionally at least one vulcanisation accelerator, at least one filling material, at least one epoxide resin, at least one tackifier resin, bitumen, at least one softener and further auxiliary and additive materials, wherein said adhesives and processes can be thermally vulcanised within a temperature range of 130° C. to 230° C., such that same, as well as an adhesive strip produced from same, can be used for adhesion and/or sealing in the automotive industry, as well as in structural work on oiled sheet metal, and in the painting line on e-coated or otherwise painted sheet metal, for example, for crimp fold adhesion, for crimp fold sealing, for seam sealing, for lining adhesion, for hole closure and much more.

The present invention is directed to a rubber composition comprising 80 phr to 100 phr of at least one solution polymerized styrene-butadiene rubber, 0 phr to 20 phr of at least one polybutadiene, 55 phr to 200 phr of a filler, at least 15 phr of oil, wherein the filler to oil ratio by weight is between 3.5:1 and 8.0:1, and wherein the weight average molecular weight (Mw) of the at least one solution polymerized styrene-butadiene rubber is within a range of 400,000 to 1,000,000 g/mol. Moreover, the present invention is directed to a tire comprising such a rubber composition.

The present invention is directed to a rubber composition comprising 80 phr to 100 phr of at least one solution polymerized styrene-butadiene rubber, 0 phr to 20 phr of at least one polybutadiene, 55 phr to 200 phr of a filler, at least 15 phr of oil, wherein the filler to oil ratio by weight is between 3.5:1 and 8.0:1, and wherein the weight average molecular weight (Mw) of the at least one solution polymerized styrene-butadiene rubber is within a range of 400,000 to 1,000,000 g/mol. Moreover, the present invention is directed to a tire comprising such a rubber composition.

A vibration isolation rubber composition containing the following components (B) to (E) together with a rubber compound made of the following (A) is produced, which makes it possible to highly satisfy both heat resistance and the reduction of dynamic magnification factors. The vibration isolation rubber composition containing (A) a diene-based rubber containing natural rubber as a main component, (B) a filler, (C) a hydrazide compound, (D) a disulfide compound represented by General Formula (1), and (E) a sulfur-based vulcanizing agent.

##STR00001##

[In General Formula (1), a ring A and a ring B each indicate a nitrogen-containing heterocyclic group having 4 to 24 carbon atoms.]

A vibration isolation rubber composition containing the following components (B) to (E) together with a rubber compound made of the following (A) is produced, which makes it possible to highly satisfy both heat resistance and the reduction of dynamic magnification factors. The vibration isolation rubber composition containing (A) a diene-based rubber containing natural rubber as a main component, (B) a filler, (C) a hydrazide compound, (D) a disulfide compound represented by General Formula (1), and (E) a sulfur-based vulcanizing agent.

##STR00001##

[In General Formula (1), a ring A and a ring B each indicate a nitrogen-containing heterocyclic group having 4 to 24 carbon atoms.]

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