Stamicarbon B.v.

Other

Stamicarbon B.v., Licensing Subsidiary of Dsm

Jozef L Van Der Loos

Kaneyoshi Ashida

Kurt C Frisch

Albert A Van Geenen

Jan Tijssen

Joseph J Bongers

Cornelis H Vrinssen

Wilhelmus G Duyzings

Wilhelmus G Duijzings

The present invention provides a molded product composed of a polymer alloy of a polyamide polymer and at least one polyurethane polymer, polyurea polymer, and/or polyisocyanurate polymer. The polymer alloy is an interpenetrated network of different polymers, a semi-interpenetrating network of different polymers, or a polyblend of different polymers. Reactant streams containing the compounds for forming the polymers of the polymer alloy are admixed to form a reaction mixture. The liquid reaction mixture is preferably a substantially homogeneous mixture of the reactant compounds. Each reactant stream thus contains only a portion of the components required to obtain the polymer alloy product. The resulting mixture is then rapidly introduced into a mold wherein chemical reaction takes place and the polymer alloy forms. Preferably, the mold is heated. The solid polymer alloy product is then recovered from the mold.

Process for preparing a polymer alloy, molded product, and reaction

An N-substituted carbamoyl-lactam compound of the formula ##STR1## wherein R is a di-valent radical derived from polytetramethylene glycol, R' is an at least divalent radical derived from a diisocyanate, Y is a C.sub.3 -C.sub.14 ring-forming alkylene group, and a has a value of at least 1 and is a number corresponding to the mean functionality of the aforesaid polyisocyanate minus 1. A process for preparing the N-substituted carbamoyl-lactam compound is also described.

N-substituted carbamoyl-lactam

The invention relates to a process for preparing an N-substituted carbamoyl-lactam compound having the formula: ##STR1## by admixing a polyhydroxy compound having the formula R(OH).sub.n with a polyisocyanate having the formula OCH--R'--NCO, wherein said

Process for preparing an N-substituted carbamoyl-lactam compound

A reaction injection molding process is disclosed comprising:

Reaction injection molding process and reaction injection molded products

The invention concerns an N-substituted carbamoyl-lactam compound characterized by the formula: ##STR1## where in the formula: R is a polyol radical from a polyol having the formula R--(OH).sub.xi, where .sub.xi is an integer.gtoreq.2

N-Substituted carbamoyl-lactam compound

The invention concerns a simple, reliable and reproducable process for the preparation of an N-substituted carbamoyl lactam compound, for example of the following formula: ##STR1## where: R is a polyol originating from a polyol having the formula R-(OH).sub.xi, where

Process for the preparation of an N-substituted carbamoyl-lactam compound

An improved process for the preparation of heat resistant copolymers of an alpha-methylstyrene and acrylonitrile by polymerization thereof in aqueous emulsion, and in the presence of a free-radical-supplying compound and a chain-transfer agent. The polymerization reaction is insufficiently cooled to remove all of the released reaction heat, and in combination therewith the polymerization is conducted at a temperature of the aqueous emulsion maintained at a level of at most 110.degree., while further maintaining the mean rate of temperature increase per hour, v, at a value of at most 60.degree. C. per hour, wherein v is determined by the formula: ##EQU1## in which: T.sub.m =maximum temperature of the aqueous emulsion (.degree.C.),

Process for the preparation of a copolymer comprising

The invention relates to a heat resistant polymer composition based on one or more graft copolymers of styrene and acrylonitrile on a rubber and a copolymer of .alpha.-methylstyrene and acrylonitrile. This composition comprises:

Polymer composition of .alpha.-methyl styrene/acrylonitrile copolymer

An improved process for the preparation of copolymers of .alpha.-methylstyrene and other co-monomers such as acrylonitrile styrene, methyl methacrylate and the like, wherein a substantially water-immiscible softener is employed, particularly prior to coagulation of the latex formed of the copolymer, whereby an improved product of higher bulk density and easier to employ in a subsequent processing is obtained.

Process for the preparation of a copolymer of .alpha.-methylstyrene

An improved process for the preparation of copolymers by the polymerization of from about 25 to 85 parts by weight of a styrene and/or .alpha.-methylstyrene monomer together with about 15-75 parts by weight of acrylonitrile and/or methacrylonitrile monomer in an aqueous dispersion in the presence of a compound yielding free radicals is disclosed whereby the quantity of monomer remaining in the copolymer after polymerization is substantially reduced. A compound yielding water-soluble free radicals is added to the aqueous reaction medium, containing copolymer as well as non-converted monomer, in a quantity of between about 0.05 and 2.5 parts per 100 parts by weight of monomer and copolymer present in the reaction medium, at a point of time at which (a) the rate of conversion of monomer to copolymer is less than 15% per hour, (b) the degree of conversion of monomer to copolymer is greater than 75%, and (c) at least 0.1 weight percent of non-converted acrylonitrile and/or methacrylonitrile relative to the total weight of the reaction medium, remains in the reaction medium, and whereafter no additional monomer is added.

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Sittard, Netherlands

Jozef L Van Der Loos