Patents Assigned to Synres International B.V.
  • Continuous mass preparation of polymers
    Patent number: 4209599
    Abstract: A process for the continuous mass polymerization of olefinically unsaturated monomers in the presence of a polymerization initiator. The polymerization is carried out in one or more tubular reactors provided with internal static mixing elements. A portion of the reaction mass produced in the reactor is recirculated back to the reactor as feed.
    Type: Grant
    Filed: January 13, 1978
    Date of Patent: June 24, 1980
    Assignee: Synres International B.V.
    Inventors: John W. Brady, Pieter Eijsberg, Johan D. Logemann
  • Thermosetting polyester compositions
    Patent number: 4131635
    Abstract: Thermosetting moulding material comprising an unsaturated polyester, a copolymerizable vinyl monomer and other additives are disclosed which contain as a shrinkage-reducing additive a copolymer of styrene with 2 to 10% by weight of an unsaturated monocarboxylic acid, and 15 to 40% by weight of a dialkyl ester of an unsaturated dicarboxylic acid. These compositions may be used as casting resins, in dough-moulding and in sheet-moulding to prepare dimensionally stable objects with a smooth surface and homogeneous coloration.
    Type: Grant
    Filed: January 25, 1977
    Date of Patent: December 26, 1978
    Assignee: Synres International B.V.
    Inventor: Frits M. W. Wilschut
  • Process for the preparation of stable aqueous emulsions of addition polymers and copolymers
    Patent number: 4110285
    Abstract: In emulsion polymerizations the improvement of using a mixture of phosphate esters of the formula (RO).sub.2 PO(OH) and (RO)PO(OH).sub.2, where RO is an alkoxy radical of an unsaturated polymerizable alcohol of 2 to 12 carbon atoms, or of A-B which is derived from A and B where A is an acid radical of an unsaturated polymerizable carboxylic acid of 3 to 25 carbon atoms and B is a radical of a divalent alcohol, in an amount of between 0.1, and 15% by weight based on the total weight of polymerizable compounds.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: August 29, 1978
    Assignee: Synres International B.V.
    Inventors: Dick A. Pons, Anno Bijker
  • Process for preparing aqueous emulsions of addition polymers with built-in emulsifier
    Patent number: 4101490
    Abstract: An emulsifier of the formula (RO) (TO)PO(OH) where RO is an alkoxy of an unsaturated polymerizable alcohol or is ABO alkoxy wherein A is a carboxylate of 3-25 carbon atoms and B is a dialkoxy group of a diol, wherein TO is an alkoxy of a branched or unbranched aliphatic alcohol, of polyoxyalkylated alkyl phenols, of addition products of ethylene oxide and aliphatic alcohols or of addition products of alkalene oxides and aliphatic alcohols, for emulsion polymerizations of addition polymers.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: July 18, 1978
    Assignee: Synres International B.V.
    Inventors: Dick A. Pons, Anno Bijker