Patent 2002225523

Peroxide compositions with reactive diluents

Abstract

Abstract: The invention relates to peroxide compositions comprising a reactive diluent for the peroxide, wherein the dilu ent is either a component containing one or more vinyl ether group(s) and having a monomeric structure according to formula 1, (A-CH=CH-O),-R, or is a suitable resinous compound comprising, in a covalently built-in manner, a component containing one or more vinyl ether group(s). In the formula A represents hydrogen or an alkyl group with 1-3 C atoms, and individual A groups may 0 be different; R either represents an aliphatic group, optionally branched, with 1-20 C atoms, etc. or represents a polyethylene or polypropylene glycol with 2 to 120 glycol units, etc. and n is 1,2,3 or 4. The resinous compounds comprising, in a covalently built-in manner, a component containing one or more vinyl ether group(s) are obtained by reaction of: a) a first compound (the HVE-com pound) containing at least one hydroxyl group and at least one vinyl ether group, and b) a second compound (the D/HIC-compound), being an isocyanate, reacting with formation of one or more urethane group(s), and c) a third compound (the G/P/HP-compound) chosen from the groups of (1) C2-6 glycols, (2) C5 20 polyols having 2-5 hydroxyl groups and (3) hydroxyl terminated polyester compounds, not being alkyd resins, having 1-5 free hydroxyl groups and from 2-50 monomeric ester units (the G/P/HP-compound), or mixtures thereof. The invention also relates to the preparation of such compositions and to the use of such reactive diluents for peroxides in radically curing of unsaturated polyester resins for structural applications. WO 02/051879 PCT/NL01/00922 PEROXIDE COMPOSITIONS WITH REACTIVE DILUENTS 5 The present invention relates to peroxide compositions comprising (a new class of) reactive diluents for the peroxide. The present invention also relates to the preparation of such peroxide compositions and to the use of (said new class of) reactive diluents for peroxides in processes for radically 10 curing of - optionally reinforced - unsaturated polyester resins for structural applications. The invention finally relates to products obtained by curing with a peroxide composition according to the present invention. Diluents for peroxides are compounds or compositions, which are being used for enabling the peroxides to be suitably stored and handled, as 15 free flowing or pumpable products, before they are being used in chemical reactions. Referring to their function, namely of making the composition free flowing or pumpable, such compounds or compositions also may be called "flow enhancers" or "extenders". Two main categories of diluents can be distinguished, non-reactive diluents and reactive diluents. In general diluents do not need to be 20 reactive (further definition is given below) to be suitable as a diluent. Non-reactive types of diluents generally are also being referred to as phlegmatizers: this is, because they ensure that any unwanted reactions of peroxides do not start before the peroxide composition (diluent plus peroxide) is added to the reaction system of the chemical reaction. This ensures easy and 25 safe handling of peroxides. Until now many compounds and compositions have been described as being suitable phlegmatizers for peroxides. An industrially important class of chemical reactions where peroxides are involved is formed by the processing (curing, for instance for making laminates or for chemical fastening) of unsaturated polyester resins (or vinyl ester resins, vinyl urethane 30 resins or hybrid resins; hybrid resins as meant herein are mixtures of vinyl ester or unsaturated polyester resins with isocyanates) dissolved in a suitable monomer. For such curing reactions usually phlegmatized peroxides are used in order to initiate polymerization by radical reaction. Reactive diluents, on the other hand, are chemical compounds, 35 which do not readily react with peroxides as such, but are able to react in the presence of (and with) a radically curable resin, for instance an unsaturated polyester. In the peroxide composition, however, the reactive diluent also has a

Information

Australian application number
2002225523
Country
ZY
Status
Lapsed
Type
Standard
Applicant
Hilti Aktiengesellschaft, AG (LI)
Application year
2003

International Patent Classification (IPC) codes