The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2001
Filed:
Feb. 29, 2000
Kari Keinänen, Porvoo, FI;
Glenn Wigington, Forth Smith, AR (US);
Neste Chemicals Oy, Espoo, FI;
Abstract
The invention relates to unsaturated polyester resins with higher molecular weight, low viscosity and high solubility specially in reactive diluents. The invention also relates to a method for the manufacture of such unsaturated polyester resins and to use thereof in various applications such as gelcoats. The unsaturated polyester resin comprises 20-85 wt % of at least one unsaturated polyester having a molecular weight of 2000-6000, prepared from 1) 30-70 mol %, preferably 40-60 mol % of at least two carboxylic acids or derivatives thereof and at least one of them is an unsaturated carboxylic acid or a derivative thereof and at least one of them is an aromatic carboxylic acid or a derivative thereof and optionally of one or more carboxylic acids and derivatives thereof, 2) 30-70 mol %, preferably 40-60 mol % of at least two diols and at least one of them is 2,2,4-trimethyl- 1,3-pentanediol and/or 2-butyl-2-ethyl- 1,3-propane-diol the amount of which is 0.5-8 mol %, preferably 2-6 mol %, 3) 0.5-10 mol %, preferably 2-6 mol % of at least one monoalcohol, 4) optionally a modifying chemical/chemicals and the total amount of monoalcohols and modifying chemicals is 0.5-20 mol %, preferably 1-15 mol %, and 15-50 wt % of at least one reactive diluent.