US 5,514,322 A · Rim method of molding thermoplastic resin

Abstract

An RIM method of thermoplastic resin comprises a process for preparing materials in which one compound (i) is mixed with a material for thermoplastic resin to prepare one mixture (I), and the other compound (ii) is mixed with a material for thermoplastic resin to prepare the other mixture (II), each of two compounds (i) and (ii) being inactive to the material for thermoplastic resin but producing a high-active anionic polymerization catalyst by their reaction, a process for polymerization in which the mixture (I) and the mixture (II) are mixed, injected into a mold, and polymerized by the anionic polymerization catalyst, an ejecting process in which a solidified thermoplastic resin molded body is ejected from the mold. Therefore, a polymerization reaction cannot be started before the material for thermoplastic resin is injected into the mold, and it begins soon after the material for thermoplastic resin is injected into the mold.

Claims29

Dependent claims

A RIM method of molding a thermoplastic resin comprising:

mixing a first compound (i) with a material polymerizable by anionic addition polymerization to form a thermoplastic resin to prepare a first mixture (I), mixing a second compound (ii) with a material polymerizable by anionic addition polymerization to form a thermoplastic resin to prepare a second mixture (II), said compounds (i) and (ii) each being inactive with respect to the polymerizable material in its respective mixture (I) or (II) but reacting with the other to produce a high-active anionic polymerization catalyst when mixed, and said mixtures (I) and (II) each containing from 0.01 to 10 mol % of its respective compound (i) or compound (ii);
mixing said mixture (I) and said mixture (II);
injecting the resulting mixture into a mold;
polymerizing the injected polymerizable material by anionic addition polymerization in the presence of a polymerization catalyst generated by the reaction of said compounds (i) and (ii), and
ejecting the resulting solidified thermoplastic resin molded body from said mold.

2 more elements

A RIM method of molding a thermoplastic resin comprising:

mixing a first compound (i) with a material polymerizable by anionic addition polymerization to form a thermoplastic resin to prepare a first mixture (I), and mixing a second compound (ii) with a material polymerizable by anionic addition polymerization to form a thermoplastic resin to prepare a second mixture (II), each of the two compounds (i) and (ii) being inactive with respect to said material in its respective mixture but reacting with the other to produce a high-active anionic polymerization catalyst when mixed, each of said mixtures (I) and (II) containing from 0.01 to 10 mol % of its respective compound (i) or compound (ii), and at least one of said mixtures (I) and (II) containing a third compound (iii) which is a Lewis acid having no polymerization activity;
mixing said mixture (I) and the mixture (II);
injecting the resulting mixture into a mold;
polymerizing the injected polymerizable material by anionic addition polymerization , said polymerization being conducted in the presence of a polymerization catalyst generated by the reaction of said compounds (i) and (ii);
and
ejecting the resulting solidified thermoplastic resin molded body from said mold.

3 more elements

Dependencies are inferred from the claim text.

Rim method of molding thermoplastic resin

Life of this patent

Rim method of molding thermoplastic resin

Life of this patent

Abstract

Claims29