LOW VISCOSITY, HIGH SOLIDS POLYESTERDIOLS AND COMPOSITIONS CONTAINING SAME

• Main Authors: GEORGE A. KNUDSEN, KONSTANTINOS R. RIGOPOULOS, KAREN K. KUO, ALBERT I. YEZRIELEV, RICHARD W. RYAN
• Format: Patent
• Language: English; Spanish
• Published: 30.09.1998
• Edition: 6
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

Polyesterdiols having low viscosities of less than 3500 cps, high content of non-volatile matter in excess of 96 wt.percent, and narrow molecular weight distribution of less than about 1.4 are prepared by esterification of one or more aliphatic dicarboxylic acids or ester derivatives thereof using at least at 1.5 molar excess of one or more aliphatic diols until an acid number of less than 20 is achieved, and stripping excess diol from the polyesterdiol reaction product. Where esterification catalyst is used, catalyst is substantially removed prior to stripping excess unreacted diol from polyesterdiol reaction product. The polyesterdiols so produced are useful as (i) curable components in thermosettable resin compositions, particularly compositions essentially free of volatile organic solvent and also containing a cross-linking agent and a reactive hardening agent; and/or (ii) useful as coatings, paints and adhesives, providing coatings with very low content of volatile organic compounds. Poliésterdioles teniendo bajas viscosidades de menos de 3,500 CPS, alto contenido de material no volátil en exceso de 96% en peso, y una distribucion de pesos moleculares angosta de menos de alrededor de 1.4, son preparados por esterificacion de uno o más ácidos dicarboxílicos alifáticos o sus derivados éster usando al menos un exceso 1.5 molar de uno o más dioles alifáticos hasta que se alcanza un numero ácido de menos de 20, y despojando el exceso de diol del producto de reaccion de poliésterdiol. Donde se usa catalizador de esterificacion, el catalizador es removido de manera sustancial antes de despojar el exceso de diol sin reaccionar del producto de reaccion de poliésterdiol. Los poliésterdioles así producidos son utiles como (1) componentes curables en composiciones de resina termofraguable particularmente composiciones esencialmente libres de solvente orgánico volátil y también conteniendo un agente de eslabonamiento transversal y un agente de endurecimiento reactivo; y/o (II) utiles como revestimientos, pinturas y adhesivos, proporcionando revestimientos con contenido sumamente bajo de compuestos orgánicos volátiles.