High-solid alkyd resins

Holberg K (1987) High Solids Alkyd Resins. Marcel Dekker, New York... 

In order to meet environmental regulations pertaining to VOCs, high-solid alkyd resins have been developed with about 80 % by weight or more of the vehicle solids at acceptable viscosity. In high-solid resins, low viscosities are typically achieved by decreasing the MW of the polymers. The reduction in MW has a consequence of relatively poor... 

Another approach for high-solid alkyd resins is to synthesize the resin with a narrower MW distribution. It has been reported that by decreasing the MW distribution, the solids could be 2 to 10 % higher than an alkyd of the same composition prepared by the conventional method (with broader MW distribution). 

In order to come to an economy that is sustainable in all respects it is of utmost importance that biobased materials are able to make an enlarged contribution to products where a long service lifetime is required. The aim of the work described in this paper is to make a contribution to biobased products requiring a long service time. In this paper research and development activities towards phthalate free, isosorbide based plasticisers, high solid alkyd resins and cobalt free drying catalysts are described. 

High-solid alkyd resins based on renewable resources... 

Part of the work on the plasticiser development was sponsored by several Dutch Ministries the Ministry of Economic Affairs, the Ministry for Housing, Spatial Planning and the Environment, the Ministry for Education, Culture and Science and the Ministry of Agriculture, Nature Management and Fisheries. Research and development work on the high solid alkyd resins and reactive diluents was done in a joined cooperation project between A F and SigmaKalon. 

Recently, the development of environmentally friendly binders produced from renewable agricultural resources, e. g. linseed and tall oil fatty acids, has been described [36]. These new poly(HAMCL) resins were applied in high solid alkyd-like coatings and paints. 

The dilution properties of hyperbranched polymers also differ from those of linear polymers. In a comparison between two alkyd resin systems, where one was a conventional high solid alkyd and the other based on a hyperbranched aliphatic polyester, the conventional high solid alkyd was seen to exhibit a higher viscosity [113]. A more rapid decrease in viscosity with solvent content was noted for the hyperbranched alkyd when the polymers were diluted. 

Pettersson and Sorensen have described a number of different thermoset resin structures based on hyperbranched aliphatic polyesters [123]. Their results can best be exemplified by a study on hyperbranched alkyd coating resins. A comparative study was performed between an alkyd resin based on a hyperbranched aliphatic polyester and a conventional high solid alkyd, which is a less branched structure. The hyperbranched resin had a substantially lower viscosity than the conventional resin of comparable molecular weight, that is, less solvent was needed to obtain a suitable application viscosity. The hyperbranched resin also exhibited much shorter drying times than the conventional resin, although the oil content was similar. These achievements would not have been possible without a change in architecture of the backbone structure of the resins (Figs. 12,13). 

Another resin application based on the same hyperbranched polyester structure described herein is low-VOC alkyds, which have very low viscosity and high reactivity compared to conventional high-solid alkyds. Other resin structures are unsaturated polyesters, polyurethane dispersions, and epoxides. ... 

Epoxy resin, bromlnated flame retardant, high-solids alkyds Cotrol BMB... 

US 3,870,664 and US 3,870,664 to Research Corporation New York disclose oil modified sucrose resins obtainable by reaction of a partial esterified sucrose ester with a cyclic dicarboxylic anhydride and a diepoxide. Although this work mentions alkyd resins based on renewables, it is not specifically aimed at deriving high solid alkyd paints based on resins with a low intrinsic viscosity. 

Characteristics of high solid alkyd paint formulations containing sucrose based alkyd resins are shown in Table II. 

The use of epoxidized hyperbranched polyesters as toughening additives in carbon-liber reinforced epoxy composites has been demonstrated [191]. The use of hyperbranched polymers as the base for various coating resins has been described in the literature. For example, a comparative study [192] between an alkyd resin based on a hyperbranched aliphatic polyester and a conventional (less branched) high-solid alkyd showed that the former had a substantially lower viscosity and much shorter drying time than the conventional resin of comparable molecular weight. 

Uses Deaerating agent for med. and high polar coating systems, esp. PU paints, high solids alkyds, ES spray tems, and urethane-polyesters resinous/poly-... 

By depolymerizing PET waste with a polyol and subsequently condensing the oligomeric product with a polycarboxylic acid or anhydride, polyester resins are produced which have wide industrial applications. Depending on the polyol and polycarboxylic acid or anhydride used, saturated resins, alkyd resins, or unsaturated resins are obtained. PET wastes have been used for the production of alkyd resins in water thinnable paints. The materials obtained from the reaction of PET with a mixture of fatty acids high in linoleic acid content and trimethylolethane have been used in the preparation of water-dispersible coatings. Products of the depolymerization of PET with trimethylolpropane and pentaerythritol are used in the manufacture of high-solids paints. In the first step, PET is depolymerized with trimethylopropane and pentaerythritol at temperatures of 230-240°C. The final paint compositions contain 30-50% of PET depolymerization products.12... 

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