摘要:
To produce a method for producing a fluorinated copolymer latex with a low content of metal components and with favorable stability of the latex even with a low content of an organic solvent. A method for producing a fluorinated copolymer latex, which comprises emulsion-polymerizing a monomer mixture containing tetrafluoroethylene and propylene in the presence of an aqueous medium, an anionic emulsifying agent and a thermally decomposable radical polymerization initiator at a polymerization temperature within a range of from 50°C to 100°C to produce a latex of a fluorinated copolymer, wherein the aqueous medium comprises water alone, or water and a water-soluble organic solvent, and the content of the water-soluble organic solvent is less than 1 part by mass per 100 parts by mass of water; and the amount of use of the anionic emulsifying agent is from 1.5 to 5.0 parts by mass per 100 parts by mass of the fluorinated copolymer to be formed.
摘要:
The present invention relates to a blend of rubber latices comprising, based on dry weight, (A) from about 80 to about 50 phr of a latex selected from the group consisting of polybutadiene latex, natural rubber or polyisoprene latex, styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, butadiene-isoprene copolymer latex, isoprene-isobutylene copolymer latex, styrene-isoprene-butadiene copolymer latex and mixtures thereof; and (B) from about 20 to about 50 phr of a hydrogenated rubber latex that is prepared in accordance with a process comprising: (1) combining an unsaturated polymer in latex form, which is derived from 5 to 100 percent by weight of a conjugated diene monomer and 95 to 0 percent by weight of an ethylenically unsaturated monomer, with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from hydrazine and hydrates thereof; and (c) a metal ion activator; (2) heating the mixture to a temperature from 0 °C to the reflux temperature of the reaction mixture.
摘要:
The present invention relates to a blend of rubber latices comprising, based on dry weight, (A) from about 80 to about 50 phr of a latex selected from the group consisting of polybutadiene latex, natural rubber or polyisoprene latex, styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, butadiene-isoprene copolymer latex, isoprene-isobutylene copolymer latex, styrene-isoprene-butadiene copolymer latex and mixtures thereof; and (B) from about 20 to about 50 phr of a hydrogenated rubber latex that is prepared in accordance with a process comprising: (1) combining an unsaturated polymer in latex form, which is derived from 5 to 100 percent by weight of a conjugated diene monomer and 95 to 0 percent by weight of an ethylenically unsaturated monomer, with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from hydrazine and hydrates thereof; and (c) a metal ion activator; (2) heating the mixture to a temperature from 0 °C to the reflux temperature of the reaction mixture.
摘要:
An aqueous composition that includes (A) a butadiene polymer latex that is prepared by an emulsion polymerization in the presence of a styrene sulfonate stabilizer and (B) a phenolic resin. A preferred aqueous butadiene polymer latex is one that is prepared by emulsion polymerization of at least 60 weight percent dichlorobutadiene monomer (based on the amount of total monomers used to form the butadiene polymer), in the presence of a styrene sulfonate stabilizer.
摘要:
The present invention provides a crosslinkable waterborne dispersion of a hydroxy functional polydiene polymer composition which comprises: (a) 10 to 65%w of a hydroxy functional polydiene polymer, (b) 0.2 to 25%w of a compatible amino resin, (c) 0.1 to 10%w of a surfactant which is nonionic or anionic and has a volatile cation, and (d) the balance water. The invention also provides a water-continuous process and an inversion processes for making such dispersions.
摘要:
Mélange de latex de caoutchouc comportant, par rapport au poids à sec: (A) de 80 à 50 phr environ d'un latex sélectionné parmi le groupe constitué de latex polybutadiène, de caoutchouc naturel ou de latex polyisoprène, de latex copolymère styrène-butadiène, de latex copolymère acrylonitrile-butadiène, de latex copolymère butadiène-isoprène, de latex copolymère isoprène-isobutylène, de latex copolymère styrène-isoprène-butadiène, et leurs mélanges; et (B) de 20 à 50 phr environ d'un latex de caoutchouc hydrogéné que l'on prépare au moyen d'un procédé consistant (1) à associer, d'une part, un polymère insaturé sous forme de latex et dérivé de 5 à 100 % en poids d'un monomère diène conjugué et de 95 à 0 % en poids d'un monomère éthyléniquement insaturé, et, d'autre part, (a) un oxydant sélectionné parmi le groupe constitué d'oxygène, d'air et d'hydroperoxydes; (b) un réducteur sélectionné parmi hydrazine et ses hydrates; et (c) un activateur d'ions métalliques; et (2) à chauffer le mélange jusqu'à une température comprise entre 0 °C et la température de reflux du mélange réactionnel.
摘要:
The present invention provides a means for improving the elastic modulus (rigidity), heat resistance, toughness, and impact resistance of a resin to provide these properties in a good balance. The present invention provides a polymer microparticle-dispersed resin composition containing 100 parts by weight of a resin and 0.1 to 150 parts by weight of polymer microparticles each containing at least two layers: a crosslinked polymer layer and a coating polymer layer, the resin composition having a particle dispersity of the polymer microparticles in the resin of not lower than 50%, the crosslinked polymer layer including 50% by weight to 99% by weight of at least one monomer having a Tg, as determined as a homopolymer, of not lower than 0°C, and 50% by weight to 1% by weight of at least one monomer having a Tg, as determined as a homopolymer, of lower than 0°C.
摘要:
Die vorliegenden Erfindung betrifft neuartige wässrige Resorcin-Formaldehyd-Latex-Dispersionen, enthaltend mindestens ein oberflächendesaktiviertes Diisocyanat. ein Verfahren zu deren Herstellung und deren Verwendung zur Haftungsverbesserung im Reifen.