Resin composition containing low-molecular weight compounds which form a polyester urethane hybrid network
AssigneeStamicarbon B.V.
InventorsRonald L. Verleg, Adrianus J. De Koning
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Abstract
The invention relates to a resin composition containing low-molecular compounds which form a polyester urethane hybrid network. The resin composition contains a first component consisting of a condensation product of at least one diol and at least one unsaturated dicarboxylic acid material, a second component containing an ethylenically unsaturated monomer capable of copolymerizing with the first component, and a third component consisting of a polyisocyanate. The first component substantially consists of a diester compound of 2 diol molecules and 1 molecule of a dicarboxylic acid material, which dicarboxylic acid material consists of at least 75% of .alpha.-, .beta.-unsaturated dicarboxylic acid.
Claims23
A two-part system containing at least a first, second and third component, wherein
- the first part of said system comprises a first component consisting of a condensation product of at least one diol and at least one unsaturated dicarboxylic acid, and a second component consisting of an unsaturated monomer capable of polymerizing with the first component,
- and the second part comprises a third component which contains a polyisocyanate, and a catalyst, wherein said second part optionally comprises the rest of the second component,
- wherein the first component consists essentially of a diester compound of 2 diol molecules and 1 molecule of a dicarboxylic acid material, said dicarboxylic acid material consisting of at least 75% .alpha.-,.beta.-unsaturated dicarboxylic acid, and
- wherein when said components are combined, the resulting resin composition is capable of being cured by undergoing a urethane polymerization reaction and a radical polymerization reaction to obtain a polyester urethane hybrid network.
Composition suitable for resin injection moulding or resin transfer moulding of an article with high impact resistance and a high heat deflection temperature, which composition comprises a resin composition and a catalyst for the radical polymerization of the resin composition, wherein said resin composition is capable of being cured by undergoing a urethane polymerization reaction and a radical polymerization reaction to obtain a polyester urethane hybrid network, said resin composition consisting essentially of low-molecular weight compounds, said resin composition containing a first component consisting essentially of a condensation product of at least one diol and at least one unsaturated dicarboxylic acid material, said first component having at least two hydroxyl groups with the proviso that said first component consists essentially of a diester compound of:
- 1) 2 diol molecules and 2) 1 molecule of a dicarboxylic acid material, which dicarboxylic acid material consists of at least 75% of .alpha.-,.beta.-unsaturated dicarboxylic acid, and a second component which consists essentially of an ethylenically unsaturated monomer capable of copolymerizing with the first component, and, as a third component, a polyisocyanate.
A process for forming molded articles which comprises the steps of:
- injecting into a mold a composition wherein said composition comprises:
- a resin composition and a catalyst for the radical polymerization of the resin composition, which resin composition consists essentially of low-molecular compounds which form a polyester urethane hybrid network, which resin composition contains a first component consisting of a condensation product of at least one diol and at least one unsaturated dicarboxylic acid material, a second component containing an ethylenically unsaturated monomer capable of copolymerizing with the first component, and a third component constituting a polyisocyanate, wherein the first component substantially consists of a diester compound of 2 diol molecules and 1 molecule of a dicarboxylic acid material, which dicarboxylic acid material consists of at least 75% of .alpha.-,.beta.-unsaturated dicarboxylic acid;
- allowing the injected resin composition to polymerize and cure in the mold and form said article;
- injecting an additional quantity of said resin composition into the mold after initiation of polymerization to compensate for shrinkage of the molded article caused by radical polymerization between the first and second components;
- and
- removing said article from said mold.
A composition suitable for resin injection moulding or resin transfer moulding of an article with high impact resistance and a high heat deflection temperature, which composition comprises
- a resin composition and a catalyst for the radical polymerization of the resin composition, wherein
- said resin composition consists essentially of low-molecular weight compounds which are capable of being cured by undergoing a urethane polymerization reaction and a radical polymerization reaction to obtain a polyester urethane hybrid network,
- said resin composition contains a first component consisting of a diester condensation product of at least two diols and at least one unsaturated dicarboxylic acid which consists of at least 75% of .alpha.-,.beta.-unsaturated dicarboxylic acid, said first component having at least two hydroxyl groups,
- a second component consisting essentially of an ethylenically unsaturated monomer capable of radically copolymerizing with the first component, and,
- a third component consisting essentially of a polyisocyanate.
Dependencies are inferred from the claim text.