Polymer Derived From Alcohol Monomer Patents (Class 525/328.8)
  • Patent number: 6194516
    Abstract: A method for producing a hydroxyl-terminated (meth) acrylic polymer which comprises converting a halogen atom in a terminal structure of the general formula (1) —CH2—C(R1)(CO2R2)(X)  (1) wherein R1 is hydrogen or methyl, R2 is alkyl containing 1 to 20 carbon atoms, aryl containing 6 to 20 carbon atoms or aralkyl containing 7 to 20 carbon atoms, and X is chlorine, bromine or iodine, of a (meth)acrylic polymer obtained by polymerizing a (meth)acrylic monomer using an organic halide or a halogenated sulfonyl compound as an initiator and, as a catalyst, a metal complex with a central metal selected from the elements belonging to the groups 8, 9, 10 and 11 in the periodic table, into a hydroxyl-containing substituent. The present invention can provide, in an easy and simple manner, a (meth)acrylic polymer which is hydroxyl-terminated at both ends in a high proportion and which has been difficult to produce in the prior art. It can give a cured product with good curing characteristics.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: February 27, 2001
    Assignee: Kaneka Corporation
    Inventors: Masato Kusakabe, Kenichi Kitano, Yoshiki Nakagawa
  • Patent number: 6180723
    Abstract: Disclosed are epoxides prepared by reacting a p-hydroxystyrene polymer and epichlorohydrin in the presence of one or more alkali agents. Also disclosed are epoxy agents prepared from reacting a p-hydroxystyrene polymer and one or more di-hydric phenol agents with epichlorohydrin in the presence of alkali. These new epoxide resins have a low melt viscosity and when cured exhibit glass transition temperatures above 300° C.
    Type: Grant
    Filed: April 27, 1999
    Date of Patent: January 30, 2001
    Inventor: Donald J. Keehan