Showing papers on "Polytetrahydrofuran published in 1982"
TL;DR: In this paper, a high purity MA-PTHF macromer was obtained by a coupling method which involved the reaction of sodium methacrylate with living PTHF, indicating one vinyl group per molecule.
Abstract: Methacryloyloxyl polytetrahydrofuran (MA-PTHF) macromer was prepared by the coupling method which involved the reaction of sodium methacrylate with living PTHF. The MA-PTHF macromer obtained by this method was shown to be highly pure macromer by a UV spectrometric method, indicating one vinyl group per molecule. The radical polymerization of the macromer was performed to check the polymerizability of the macromer. At a relatively high concentration of the macromer, it was homopolymerized at a high conversion of ca. 90%. Furthermore, the macromer was quantitatively copolymerized with styrene to the copolymer. This quantitative conversion is consistent with the high purity of MA-PTHF macromer obtained.
24 citations
Patent•
10 Nov 1982TL;DR: In this article, the authors provided compositions which comprise a blend of: p0 (a) from about 10 to about 97 percent by weight of the composition of a polyamide resin having a minimum molecular weight of about 5,000; p 0 (b) from approximately 3 to about 90 percent of the compositions of an elastomeric polymer which is selected from a group consisting of poly(ethylene oxide), poly(propylene oxide) polymers and copolymers and combinations thereof; and (c) contains a minimum of about 0.055 milliequival
Abstract: The present invention provides compositions which comprise a blend of: p0 (a) from about 10 to about 97 percent by weight of the composition of a polyamide resin having a minimum molecular weight of about 5,000; p0 (b) from about 3 to about 90 percent by weight of the composition of an elastomeric polymer which (1) is selected from a group consisting of poly(ethylene oxide), poly(propylene oxide), polycaprolactone, polytetrahydrofuran, polybutadiene, polyisoprene, polyisobutylene, poly(C 1 -C 8 alkylene acrylate), poly(C 1 -C 4 dialkylene siloxane), poly(ethylene-co-propylene), poly(ethylene-co-carbon monoxide), polyethylene-co-vinyl chloride, and poly(ethylene-co-vinyl acetate) polymers and copolymers and combinations thereof; and (2) contains a minimum of about 0.055 milliequivalents of acyllactam groups per gram of said elastomeric polymer.
16 citations
Patent•
23 Nov 1982TL;DR: A colored or colorless nail enamel consists essentially of at least one film forming agent, a resin and a solvent system as discussed by the authors, which can also contain a plasticizing agent and/or a coloring agent.
Abstract: A colored or colorless nail enamel consists essentially of at least one film forming agent, a resin and a solvent system. The enamel can also contain a plasticizing agent and/or a coloring agent. The resin is polytetrahydrofuran having the formula: HO--CH2 --CH2 --CH2 --CH2 --O]n H wherein n is such that the average molecular mass is between 300 and 3,000,000.
6 citations
TL;DR: In this article, a block copolymer of the CAC type is formed, which exhibits a molecular weight which obeys the rules valid for living polymers, but the growth of polytetrahydrofuran on the transformed centre is not identical to the usual homopolymerization growth.
5 citations
Patent•
02 Apr 1982TL;DR: In this article, a process for homopolymerizing tetrahydrofuran, optionally in an organic solvent, together with acrylic acid anhydride and/or methacrylic acid anh-hydride, with the aid of a catalyst is described.
Abstract: Polytetrahydrofurans containing terminal acrylate or methacrylate groups and having a molecular weight of from 200 to 10,000 and a process for producing such polytetrahydrofurans by homopolymerizing tetrahydrofuran, optionally in an organic solvent, together with acrylic acid anhydride and/or methacrylic acid anhydride and with the aid of a catalyst. The polytetrahydrofuran can be used as rubbers.
3 citations