28 results about "Chloroprene Polymers" patented technology

One embodiment of the present invention relates to a method for producing a chloroprene seed polymer composition, the method comprising a first polymerization step and a second polymerization step, the first polymerization step is a step for obtaining a chloroprene polymer by subjecting at least a chloroprene monomer to emulsion radical polymerization. The second polymerization step is a step in which at least a specific monomer (B-1) or (B-2) is subjected to emulsion seed polymerization with the chloroprene polymer in an amount of 3-20 parts by mass per 100 parts by mass of the total of the chloroprene polymer and the monomer (B-1) or (B-2).

Provided are: a chloroprene polymer latex composition which is capable of obtaining an adhesive composition having excellent sprayability; and an adhesive composition which contains the chloroprene polymer latex composition. According to the present invention, provided is a chloroprene polymer latex composition containing a chloroprene polymer, the chloroprene polymer latex composition for a test being obtained by adjusting the chloroprene polymer latex composition to a solid content concentration of 55 mass%, and the chloroprene polymer latex composition having a mechanical stability test under conditions of a load of 10 kg and a rotation speed of 1000 rpm, the occurrence rate of agglomerates in the chloroprene polymer latex composition for tests is 0.01-1.00%, and the viscosity of the chloroprene polymer latex composition for tests, as measured by a B-type viscometer at 23 DEG C and 6 rpm, is 22-100 mPa * s.

The present invention addresses the problem of providing a chloroprene-based polymer from which a dip-molded article can be obtained, said dip-molded article having sufficient tensile strength at break and flexibility and being capable of maintaining flexibility even after long-term storage. According to the present invention, provided is a chloroprene polymer containing chloroprene monomer units and 2, 3-dichloro-1, 3-butadiene monomer units, the chloroprene polymer containing 12-30% by mass of 2, 3-dichloro-1, 3-butadiene monomer units per 100% by mass of the total of the chloroprene monomer units and the 2, 3-dichloro-1, 3-butadiene monomer units, and the chloroprene polymer containing 2, 3-dichloro-1, 3-butadiene monomer units per 100% by mass of the total of the chloroprene monomer units and the 2, 3-dichloro-1, 3-butadiene monomer units. The chloroprene polymer latex composition for a test, which contains the chloroprene polymer, is molded by a dip solidification method, and the chloroprene polymer latex composition contains a 1, 3-butadiene monomer unit and a toluene-insoluble component of the chloroprene polymer is 60-87 mass%. The test dip-molded article obtained by heating and drying at 130 DEG C for 30 minutes has a low-temperature hardness change [Delta] H1 of 29 or less, the low-temperature hardness change [Delta] H1 denotes HB1-HA1, and HA1 denotes that after the test dip-molded article is heated at 70 DEG C for 30 minutes, the test dip-molded article is superimposed to a thickness of 6.00 + / -0.20 mm, and the test dip-molded article has a thickness of 6.00 + / -0.20 mm. The Shore hardness measured in an environment of 23 DEG C using a Type A durometer, HB1 being heat-treated at 70 DEG C for 30 minutes, and after the dip-molded article for test is stored at-10 DEG C for 168 hours, the dip-molded article for test is overlaid to a thickness of 6.00 + / -0.20 mm, and the thickness of the dip-molded article for test is 6.00 + / -0.20 mm. The test dip-molded product is obtained by gas chromatography of an extract obtained by extracting the test dip-molded product with an ethanol / toluene azeotropic mixture as stipulated in JIS K 6229 using a Shore hardness measured in an environment of-10 DEG C using a Type A durometer; the ratio RB / RA of the total amount RB of the peak areas of abietic acid, neoabietic acid, longifolic acid, levopimaric acid, and salts thereof to the total amount RA of the peak areas of dehydroabietic acid, pimaric acid, isopimaric acid, dihydroabietic acid, and salts thereof is 0.10-0.70.

The purpose of the present invention is to provide a dip-molded article including a chloroprene-based polymer, the dip-molded article having sufficient tensile strength at break and excellent texture of a dip-molded object (film), and exhibiting excellent feeling of wearing when made into a glove. The present invention provides a dip-molded article including a chloroprene-based polymer, the dip-molded article having a storage modulus E' of 3.2 MPa or less and a loss modulus E" of 0.37 MPa or less in the 10 Hz frequency region, as obtained from tension-type dynamic viscoelasticity measurement based on a non-resonant forced vibration method under the conditions of static tension of 5 gf, temperature of 25°C, strain of 0.75%, and amplitude of 0.15 mm.

Provided is a chloroprene polymer latex composition with which a dip-molded article having excellent flexibility and excellent tensile strength at break can be obtained. According to the present invention, provided is a chloroprene polymer latex composition containing a chloroprene polymer latex (A), a metal oxide (B), a vulcanization accelerator (C), sulfur (D), and an aromatic heterocyclic compound (E), the chloroprene polymer rubber obtained by freeze-drying the chloroprene polymer latex (A) having a toluene-insoluble component of 50-95% by mass, the chloroprene polymer latex composition contains 0.3-15.0 parts by mass of the metal oxide (B), 0.02-1.50 parts by mass of the vulcanization accelerator (C), 0.01-0.75 parts by mass of the sulfur (D), and 0.1-10.0 parts by mass of the heteroaromatic compound (E) per 100 parts by mass of the solid content of the chloroprene polymer latex (A), and the content of the metal oxide (B), the vulcanization accelerator (C), the sulfur (D), and the heteroaromatic compound (E) is 100 parts by mass of the solid content of the chloroprene polymer latex (A). The vulcanization accelerator (C) contains at least one of thiuram-based, dithiocarbamate-based, thiourea-based, guanidine-based, xanthate-based, and thiazole-based vulcanization accelerators, and the heteroaromatic compound (E) is represented by chemical formula (1).

The present invention provides: a chloroprene polymer composition which is not susceptible to layer separation and coloring when mixed with a solvent, and which enables the preparation of an adhesive composition that is excellent in terms of storage stability; and a method for producing a chloroprene polymer composition. The present invention specifically provides a chloroprene polymer composition which contains a chloroprene polymer, wherein: the chloroprene polymer composition has a moisture content of 10 mass% or less; and the content C of dehydroabietic acid, which is present in the form of a dehydroabietic acid salt, with respect to 100 parts by mass of the chloroprene polymer composition is 0.075-1.600 parts by mass as measured by a specific measurement method.

Provided is a method for producing a chloroprene-based polymer composition that supports a high recovery ratio from the polymerization vessel and that makes it possible to obtain dip-molded articles having a low 100% elongation modulus and an excellent tensile strength at break. The present invention provides a method for producing a chloroprene-based polymer composition, wherein the chloroprene-based polymer composition comprises a diene-based polymer A and a chloroprene-based polymer B and the diene-based polymer A and the chloroprene-based polymer B have different weight-average molecular weights. The method for producing this chloroprene-based polymer composition comprises a polymerization step for polymerizing the chloroprene-based polymer B in the presence of the diene-based polymer A.

A rubber material which is a rubber material containing a sulfur-modified chloroprene polymer, the content X (mass%) of sulfur constituting the aforementioned sulfur-modified chloroprene polymer, and the total amount Y (mass%) of a conjugated resin acid and a salt of a conjugated resin acid satisfy the following formula (A) with respect to the total amount of the rubber material being 1.00 mass% or more.13.90X - 5.10 ≤ Y...(A)

To provide a chloroprene-based polymer latex having adequate mechanical stability.SOLUTION: The present invention provides a chloroprene-based polymer latex including micelles each containing a chloroprene-based polymer and an emulsifier. When a volume-based particle size distribution of the micelles is measured by a dynamic light scattering method in a range of 1-10,000 nm to obtain a histogram in which the horizontal axis represents the particle size represented by common logarithm and has 45 classes obtained by equally dividing the horizontal axis in the range of 1-10,000 nm into 45 portions, and in which the vertical axis represents a volume distribution, and when dk nm represents the particle size class value of class k having the k-th smallest particle size, Vk% represents the volume distribution of class k, s% represents the solid content concentration of the chloroprene-based polymer latex, ρLx g / cm3 represents the specific gravity of the chloroprene-based polymer latex, ρCR g / cm3 represents the specific gravity of the chloroprene-based polymer, n mol represents the amount of the emulsifier contained in 1 L of the chloroprene-based polymer latex, and NA represents the Avogadro's number, the chloroprene-based polymer latex satisfies the following formula. Formula 1.SELECTED DRAWING: None

Provided is a chloroprene polymer latex which has excellent mechanical stability and excellent recovery efficiency of a rubber by means of freezing or the like. The present invention provides a chloroprene polymer latex which comprises micelles that each contain a chloroprene polymer and an emulsifier. The volume-based particle size distribution of the micelles is determined in the range of 1 nm to 10,000 nm by means of dynamic light scattering so as to obtain a histogram. The histogram takes particle diameters which are expressed by common logarithms on the horizontal axis, has 45 classes that are obtained by dividing the horizontal axis into 45 equal parts in the range of 1 nm to 10,000 nm, and takes the volume distribution on the vertical axis. If dk nm is the class value of the class k particle diameter that is the k-th smallest particle diameter, Vk is the volume distribution of the class k, S is the solid content ratio of the chloroprene polymer latex, ρLx g / cm3 is the specific gravity of the chloroprene polymer latex, ρCR g / cm3 is the specific gravity of the chloroprene polymer, n mol is the amount of the emulsifier contained in 1 L of the chloroprene polymer latex, and NA is the Avogadro number, the chloroprene polymer latex satisfies the following formula. [Mathematical formula 1]

To provide chloroprene utilizable as a raw material for synthetic rubbers while reducing loads on the environment, to provide a method for producing the chloroprene, and to provide a chloroprene rubber.SOLUTION: According to one aspect of the present invention, there is provided chloroprene, wherein the chloroprene contains a carbon atom derived from biomass.SELECTED DRAWING: None

[Objective] To develop, as an automotive interior material, a chloroprene polymer latex adhesive composition being excellent in terms of both characteristics of adhesiveness to nonpolar materials such as olefins and thermal creep resistance and having favorable storage stability without performing a complicated step. [Solution] An adhesive composition containing a chloroprene polymer latex, containing a chloroprene polymer latex (A), a tackifier (B), and a chlorinated polyolefin resin (C), in which a content rate of a gel component of a chloroprene polymer in the chloroprene polymer latex (A) is more than 0 mass% and 50 mass% or less, the tackifier (B) has a softening point of 85°C or higher, and the chlorinated polyolefin resin (C) has a softening point of lower than 80°C, the tackifier (B) is more than 5 parts by mass and less than 30 parts by mass relative to 100 parts by mass of a solid content of the chloroprene polymer latex (A), the chlorinated polyolefin resin (C) is 6 parts by mass or more and less than 30 parts by mass relative to 100 parts by mass of a solid content of the chloroprene polymer latex (A), and no crosslinking agent is contained.

The present invention provides a chloroprene polymer latex which enables the achievement of a dip-molded article of a chloroprene polymer, the dip-molded article having a sufficient tensile strength at break and excellent texture. The present invention provides a chloroprene polymer latex which contains a chloroprene polymer, wherein: the apparent hardness of a dip-molded article film, which contains the chloroprene polymer latex and has a thickness of 0.60 ± 0.10 mm, is 25.0 IRHD to 40.0 IRHD as measured at 23°C using a Wallace automatic microhardness meter; the dip-molded article film that has a thickness of 0.60 ± 0.10 mm is obtained by stacking a plurality of dip-molded article films that have a thickness of 0.15 mm to 0.25 mm; the dip-molded article films that have a thickness of 0.15 mm to 0.25 mm are obtained by subjecting dip-molded films, which are obtained by dipping ceramic molds to which a calcium-based coagulating solution has been adhered into a chloroprene polymer latex composition that contains the chloroprene polymer latex by means of a dipping coagulation method, to a heat drying process at 150°C for 60 minutes.

The present invention relates to a composition including a chloroprene polymer, a molded body, and a method for producing a molded body, and the composition includes a chloroprene polymer (A), and a thiol compound (B) having 2 mercapto groups in a molecule. An amount of the thiol compound (B) is 1.5 to 20 parts by mass per 100 parts by mass of the chloroprene polymer (A).

Provided are a chloroprene-based polymer latex composition from which it is possible to obtain an immersion molded body that has excellent flexibility and excellent tensile strength when being cut; and an immersion molded body that is obtained from the chloroprene-based polymer latex composition and that has excellent flexibility and excellent tensile strength when being cut. The present invention provides a chloroprene-based polymer latex composition that contains a chloroprene-based polymer latex, a metal oxide, and a mercapto-based compound. The chloroprene-based polymer latex composition contains 0.3-15.0 parts by mass of the metal oxide and 0.10-10.00 parts by mass of the mercapto-based compound with respect to 100 parts by mass of the solid content of the chloroprene-based polymer latex.

[Objective] To develop, as an automotive interior material, a chloroprene polymer latex adhesive composition being excellent in terms of both characteristics of adhesiveness to nonpolar materials such as olefins and thermal creep resistance and having favorable storage stability without performing a complicated step. [Solution] An adhesive composition containing a chloroprene polymer latex, containing a chloroprene polymer latex (A), a tackifier (B), and a chlorinated polyolefin resin (C), in which a content rate of a gel component of a chloroprene polymer in the chloroprene polymer latex (A) is more than 0 mass% and 50 mass% or less, the tackifier (B) has a softening point of 85°C or higher, and the chlorinated polyolefin resin (C) has a softening point of lower than 80°C, the tackifier (B) is more than 5 parts by mass and less than 30 parts by mass relative to 100 parts by mass of a solid content of the chloroprene polymer latex (A), the chlorinated polyolefin resin (C) is 6 parts by mass or more and less than 30 parts by mass relative to 100 parts by mass of a solid content of the chloroprene polymer latex (A), and no crosslinking agent is contained.

Provided are: a chloroprene polymer latex composition with which it is possible to obtain an adhesive composition having excellent initial adhesion strength and freezing stability; and an adhesive composition containing the chloroprene polymer latex composition. According to the present invention, provided is a chloroprene polymer latex composition containing a chloroprene polymer and a nonionic emulsifier, the chloroprene polymer latex composition containing 0.005-0.40 parts by mass of the nonionic emulsifier per 100 parts by mass of the chloroprene polymer, and the amount of the nonionic emulsifier per 100 parts by mass of the chloroprene polymer. The chloroprene polymer has an average particle diameter of 80-160 nm and a toluene insoluble content of 30% by mass or less.

Provided is a chloroprene-based polymer latex having adequate mechanical stability. The present invention provides a chloroprene-based polymer latex including micelles each containing a chloroprene-based polymer and an emulsifier. When a volume-based particle size distribution of the micelles is measured by a dynamic light scattering method in a range of 1-10,000 nm to obtain a histogram in which the horizontal axis represents the particle size represented by common logarithm and has 45 classes obtained by equally dividing the horizontal axis in the range of 1-10,000 nm into 45 portions, and in which the vertical axis represents a volume distribution, and when dk nm represents the particle size class value of class k having the k-th smallest particle size, Vk% represents the volume distribution of class k, s% represents the solid content concentration of the chloroprene-based polymer latex, ρLx g / cm3 represents the specific gravity of the chloroprene-based polymer latex, ρCR g / cm3 represents the specific gravity of the chloroprene-based polymer, n mol represents the amount of the emulsifier contained in 1 L of the chloroprene-based polymer latex, and NA represents the Avogadro's number, the chloroprene-based polymer latex satisfies the following formula.

This invention provides a chloroprene-based polymer latex composition that yields an adhesive composition with excellent initial adhesive strength, and an adhesive composition containing the chloroprene-based polymer latex composition. According to the invention, a chloroprene-based polymer latex composition is provided, comprising a chloroprene polymer and an aromatic compound having 7 to 10 carbon atoms, wherein the total content of the aromatic compound having 7 to 10 carbon atoms in the aforementioned chloroprene-based polymer latex composition is 0.0001 to 0.0100 parts by mass relative to 100 parts by mass of solid components in the aforementioned chloroprene-based polymer latex composition.

To provide a chloroprene polymer composition which is not susceptible to layer separation and coloring when mixed with a solvent, and which enables the preparation of an adhesive composition with excellent storage stability, and a method for producing a chloroprene polymer composition.SOLUTION: According to the present invention, there is provided a chloroprene polymer composition including a chloroprene polymer, the chloroprene polymer composition having a moisture content of 10 mass% or less, and a content C of dehydroabietic acid, which is present in the form of a dehydroabietic acid salt, being 0.075 to 1.600 pts.mass per 100 pts.mass of the chloroprene polymer composition as measured by a specific measurement method.SELECTED DRAWING: None

A method for manufacturing a chloroprene polymer composition, the method including: a polymerization step of polymerizing chloroprene in the presence of at least one rosin acid component selected from the group consisting of a rosin acid and a rosin acid salt to obtain a chloroprene polymer composition containing a chloroprene polymer, in which in the rosin acid component, a mass ratio B1 / A1 of a total amount B1 of abietic acid, neoabietic acid, palustric acid, levopimaric acid, and salts thereof with respect to a total amount A1 of dehydroabietic acid, pimaric acid, isopimaric acid, dihydroabietic acid, and salts thereof is 0.10 to 3.00, and a toluene insoluble content of the chloroprene polymer is 50% by mass or more.

One embodiment of the present invention relates to a chloroprene latex composition and a method for producing an adhesive product, wherein the chloroprene latex composition contains a chloroprene latex (A) containing a chloroprene-based polymer satisfying requirement (a-1), and a tackifier (B) having a softening point of 85-155°C as measured by a ring-and-ball method. (a-1) The tetrahydrofuran insoluble fraction α [mass%] in 100 mass% of the chloroprene-based polymer and the melting enthalpy β [mJ / mg] of the chloroprene-based polymer as measured by differential scanning calorimetry (DSC) satisfy the following formula. Logβ ≥ −0.022 × α + 1.0

Provided are a chloroprene-based polymer latex composition from which it is possible to obtain an immersion molded body that has excellent flexibility and excellent tensile strength when being cut; and an immersion molded body that is obtained from the chloroprene-based polymer latex composition and that has excellent flexibility and excellent tensile strength when being cut. The present invention provides a chloroprene-based polymer latex composition that contains a chloroprene-based polymer latex, a metal oxide, and a mercapto-based compound. The chloroprene-based polymer latex composition contains 0.3-15.0 parts by mass of the metal oxide and 0.10-10.00 parts by mass of the mercapto-based compound with respect to 100 parts by mass of the solid content of the chloroprene-based polymer latex.

The present invention provides a chloroprene latex composition, a coating film of which has good surface smoothness during immersion molding.　The present invention uses a chloroprene latex composition which contains a chloroprene polymer and an emulsifying agent. The emulsifying agent is composed of an alkali metal carboxylate and a nonionic emulsifying agent having an HLB of 18.1 to 20.0. The chloroprene latex composition contains 3.0 to 6.0 parts by weight of the alkali metal carboxylate and 0.15 to 0.9 part by weight of the nonionic emulsifying agent relative to 100 parts by weight of the chloroprene polymer.

Provided is a chloroprene polymer which has high tensile strength at break and a low modulus at 100% elongation, and which makes it possible to obtain a dip-molded product having excellent texture. The present invention provides a chloroprene polymer, wherein the loss tangent tanδ in the 10 Hz frequency region of a film containing the chloroprene polymer, as obtained when the tensile-type dynamic viscoelasticity is measured in accordance with the non-resonant forced vibration technique at a temperature of 25°C and under a strain of 0.75%, is 0.08 to 0.14, and the film is obtained by drying chloroprene polymer latex containing the chloroprene polymer for three days at 23°C or lower.

To provide a chloroprene-based polymer latex excellent in mechanical stability and recovery efficiency of rubber by freezing or the like.SOLUTION: According to the present invention, there is provided a chloroprene polymer latex containing micelles containing a chloroprene polymer and an emulsifier, wherein the volume-based particle size distribution of the micelles is measured by dynamic light scattering in a range of 1 nm to 10,000 nm to obtain a histogram, the histogram having 45 classes obtained by equally dividing the horizontal axis into 45 classes in the range of 1 nm to 10,000 nm and a vertical axis representing a volume distribution, wherein the class value of the particle size of the k-th smallest class k is dk nm, the volume distribution of class k is Vk, the solid content of the chloroprene polymer latex is S, the specific gravity of the chloroprene polymer latex is ρLx g / cm3, the specific gravity of the chloroprene polymer is ρCR g / cm3, the amount of emulsifier contained in 1 L of the chloroprene polymer latex is n mol and Avogadro's number is NA, the chloroprene polymer latex satisfies the following Formula 1.SELECTED DRAWING: None

The invention relates to the technical field of roof waterproofing, in particular to a roof water leakage prevention construction method. Comprising the following steps: digging a gutter; making an internal corner arc; laying a first waterproof layer; preparing chloroprene polymer cement glue; laying a second waterproof layer; closing up and protecting the coiled material; making an additional layer; the root of the drainage pipeline is waterproof. According to the roof water leakage prevention construction method, an original inverted roof structure is provided with a plurality of waterproof structures, the roof water leakage condition is effectively improved, safe operation of units in a plant is guaranteed, and the safety of a roof steel structure is also guaranteed.

To provide a chloroprene latex composition, a coating film of which has good surface smoothness during immersion molding.SOLUTION: A chloroprene latex composition contains a chloroprene polymer and an emulsifying agent. The emulsifying agent is composed of an alkali metal carboxylate and a nonionic emulsifying agent having a HLB of 18.1 to 20.0. The chloroprene latex composition contains 3.0 to 6.0 pts.wt. of the alkali metal carboxylate and 0.15 to 0.9 pt.wt. of the nonionic emulsifying agent relative to 100 pts.wt. of the chloroprene polymer.SELECTED DRAWING: None