A new class of acrylated alkyds

Abstract

A new class of acrylated alkyds resins has been developed using a modern controlled polymerization approach. The reactive relationship between acrylics and alkyds has been defined by difficulty and an inability to propagate to form suitable grafting during a free-radical-based process. A living freeradical process was employed to provide control of both location and blocks of monomers which were attached to the polyester backbone of the alkyd. Both acrylic monomers and blocks of different monomer were successfully polymerized with control. Although there was some side reaction at the pendent fatty acid unsaturation, overall, the system was well behaved with respect to control of blocks of sequential monomers and living characteristics of the free-radical polymerization. Demonstration of concept was achieved in both high solids and waterborne systems. Representative coating properties are also reported for model alkyd systems.

Synthesis, characterization, and properties of acrylate‐modified tung‐oil waterborne insulation varnish

“…20 The grafting of acrylic macroradicals may take place via two ways: by addition to the double bonds of the fatty acid chain in alkyd resins or by abstraction of alkyd resin allylic hydrogens 21 A new type of acrylated alkyd grafting acrylic copolymer, prepared via radical polymerization to the unsaturated sites located in the backbone and the fatty acid chains, was reported. 22 Some researchers have reported the investigation of acrylic-resin-modified vegetable oils; 18,23,24 however, we found no research on the investigation of acrylate-modified tung-oil waterborne insulation varnishes.…”

“…15,16 Acrylates are widely used as a principal raw material for functional materials, 17,18 and different acrylic monomers provide distinct properties for the final products. Methyl methacrylate (MMA) and methyl acrylate (MA) afford hardness, exterior durability, and water resistance.…”

Acrylated Alkyds Synthesized via Quasi‐Living Radical Polymerization: ATRP and RAFT

“…There has been interest in being able to utilize modern synthetic techniques toward synthesizing new acrylated alkyds . Acrylated alkyds offer the ease of application and film‐forming properties of alkyds with the exterior durability of vinyl and acrylic systems .…”

“…For obtaining well‐defined polymers with controlled molecular weight, polydispersity, molecular architecture, quasi‐living polymerization techniques have gained interest in recent times . Soucek and co‐workers introduced a new class of acrylated alkyd which is synthesized using RAFT polymerization . Alkyd macro RAFT agent was synthesized by attaching RAFT agent telechelically to the alkyd backbone chain.…”

“…The copolymers were characterized using 1 H NMR, 13 C NMR, and gradient heteronuclear multiple bond correlation (gHSQC) 2D‐NMR spectroscopy. Autoxidative curing of ATRP‐polymerized acrylated alkyds was investigated and compared to the RAFT‐polymerized acrylated alkyds using Fourier transform infrared spectroscopy (FTIR) . Tensile, thermomechanical, and general coating properties were evaluated as a function of alkyd‐to‐acrylic weight ratio in order to study the effect of acrylic blocks on the coating performance.…”