Abstract: A polyester resin for toner, which consists essentially of (a) from 0.5 to 50 mol %, based on the entire alcohol components, of at least one trihydric or higher polyhydric alcohol, (b) from 50 to 99.5 mol %, based on the entire alcohol components, of at least one diol and (c) at least one member selected from the group consisting of dicarboxylic acids and lower alkyl esters thereof, and which has a softening temperature of from 90.degree. to 170.degree. C., a glass transition temperature (Tg) of from 30.degree. to 70.degree. C., an acid value of from 0.5 to 15 mgKOH/g and a gel content of from 1.5 to 40%.

Abstract: A polyester resin for toner, which consists essentially of (a) from 5 to 60 equivalent %, based on the entire carboxylic acid components, of at least one member selected from the group consisting of tribasic and higher polybasic carboxylic acids, anhydrides thereof and lower alkyl esters thereof, (b) at least one member selected from the group consisting of dicarboxylic acids and lower alkyl esters thereof, (c) at least one aromatic diol and (d) at least one aliphatic diol, and which has a softening temeprature of from 100.degree. to 170.degree. C., a glass transition temperature (Tg) of from 50.degree. to 70.degree. C., an acid value of from 0.5 to 10 mgKOH/g and a gel content of from 3 to 40%.

Abstract: Apparatus for coagulation of a polymer latex by feeding the polymer latex to an extruder having a base plate and a plurality of fine tubes fixed to said base plate and extending therefrom, said fine tubes being mutually spaced by at least 1 mm and protruding from said base plate by at least 3 mm, and discharging said polymer latex through said fine tubes into coagulation solution to coagulate the latex and an extruder used for carrying out said method.

Abstract: Disclosed is a method for producing a rubber modified thermoplastic resin excellent in surface appearance and various properties and high in commercial values which comprises removing an aqueous phase from a two-phase mixture comprising a graft rubber polymer latex (1) obtained by graft polymerization of vinyl monomer on a rubber latex, a thermoplastic resin (2), an organic agent in an amount of 0.1 to 6 times the weight of all the polymers (3) which is capable of dissolving said thermoplastic resin (2) and has a solubility in water of 5% by weight or less at 25.degree. C. and a water soluble agent in an amount of 10% by weight or less of said graft rubber polymer which can coagulate said latex and then removing said organic agent and remaining water from the remaining organic phase by a thermal means.

Abstract: Disclosed is a method for producing a rubber modified thermoplastic resin excellent in surface appearance and various properties and high in commercial values which comprises removing an aqueous phase from a two-phase mixture comprises a graft rubber polymer latex (1) obtained by graft polymerization of vinyl monomer on a rubber latex, a thermoplastic resin (2) and an organic agent in an amount of 0.2 to 6 times the weight of all the polymers (3) which is capable of dissolving said thermoplastic resin (2) and has a solubility in water of 5 to 50% by weight at 25.degree. C. and then removing said organic agent and remaining water from the remaining organic phase by a thermal means.

Abstract: A process for producing a thermoplastic resin capable of giving a molded article having a very good appearance, by coagulating a thermoplastic resin latex prepared by an emulsion polymerization method which comprises making the latex into a coagulated slurry by carrying out the coagulation procedure in a range of temperatures lower than the solidifying point of the thermoplastic resin, adding an alkaline substance to said coagulated slurry in a range of temperatures lower than the aforesaid solidifying point so that the pH of said coagulated slurry is adjusted to a pH 0.1 or more higher than its pH at the time of the coagulation and that the pH of the whole coagulated slurry after the addition of the alkaline substance is adjusted to 7.0 or lower, and then raising the temperature of said coagulated slurry to solidify the coagulated particles.