Acrylic, highly crosslinked

Fujimura, T. and Inoue, M. (1991). Improvement of the durability of wood with acryl-high-polymer III. Dimensional stability of wood with crosslinked epoxy-copolymer. Mokuzai Gakkaishi, 37(8), 719-726. 

Fujimura, T., Inoue, M. and Uemura, I. (1990). Durability of wood with acryl-high-polymer II. Dimensional stability with crosslinked acryl polymer in wood. Mokuzai Gakkaishi, 36(10), 851-859. 

Swelling data indicate that crosslink density in the continuous phase of the 70 30 and 60 A0 networks is high. Crosslink densities were estimated from the data in Table III by the method of Hill and Kozlowski ( ). Results were for 80 20, "Vg = 10" moles of elastically effective network chains/cm for 70 30, Vg = 2.5 x lO" chains/cm for 60 AO, Vg = A.3 x 10" chains/cm. These estimates suggest that the crosslink densities are within the range reported for conventional, highly crosslinked acrylic HMMM and polyester HMMM enamels (19,20). 

Anseth et al. [146,147] have experimentally characterized the kinetic constant for a series of multifunctional methacrylate and acrylate monomers. In particular, they explored the kinetic evidence for the importance of reaction diffusion for polymerizations occurring in the high crosslinking regime. When reaction diffusion is the controlling termination mechanism, it was hypothesized that k, would be proportional to fcp[m] where [m] is the concentration of double bonds. The works of Anseth et al. [146] then characterized the proportional constant between k, and kp[m for the methacrylates and acrylates studied. 

The double exposure complications introduced by the first and second order reaction mechanisms in acrylate resists led to the conclusion that the flood and patterning exposure process was not a practical solution to the problem of high crosslink density in PM-15 resist. 

Physical stability premium gel, high crosslinking macroporous acrylic matrix... 

CLEAR stands for Cross-Linked Ethoxylate Acrylate Resin. These resins belong to a group of highly crosslinked resins with good swelling properties, which are either obtained from bulk polymerisation or by suspension polymerisation 26 of monomers 1-6 as shown in Figure... 

By far the acrylates are the monomers of choice in UV curable systems. Not only do they cure at extremely rapid rates compared to other monomer systems (acrylic > methacrylic > vinyl > allylic), but they are also available in a wide range of structures which are monofimctional, difunctional, trifunctional, and tetrafunctional. Additionally, as shown in the oligomer section, acrylates can be used to derivatize oligomers or pre-polymers. Commonly in UV curable formulations it is necessary to use a number of monomers in order to achieve a balance between speed of cure and properties of the final film. It is not unheard of to use four or five monomers in a single UV curable formulation. For instance, tri- and tetra-functional acrylates result in highly crosslinked films when incorporated into UV curable resins however, they severely limit the extent and rate of the curing process. Thus, one often combines a tetrafunctional acrylate to increase crosslink density with a mono and/or difunctional acrylate to increase the cure rate. 

This application of DEC chromophores requires synthesis of asymmetrically functionalized chromophores as illustrated in Fig. 1. In this example, the hydroxyl terminated end of the chromophore is capable of condensation polymerization reactions while the acrylate functionality is capable of undergoing free radical polymerization. In Fig. 2, we illustrate schematically the stepwise synthesis of a highly crosslinked polymer matrix where both ends of the chromophore are coupled to polymer main chains. The first step in the scheme shown is accomplished by free radical polymerization yielding a soluble and processible polymer with flexible pendant chromophore groups. This polymer is spin cast into an optical quality film (0.5-1.5 micron thickness) and is heated near the glass transition temperature, poled and subsequently crosslinked by a thermal crosslinking reaction involving... 

Uses Acrylic for crosslinking with melamine resins for prod, of high-gloss weather-resist, finishing paints, wh. and colored one-coat electrodeposition coatings... 

Uses Catalyst/initiator for polymerization and for cure of acrylic syrup crosslinking agent for high-temp, cure of unsat. polyester resins... 

Uses Polymerization initiator for high temp, cure of polyesters, cure of acrylic syrups crosslinking agent for polymerization Diamyl phenol CAS 28652-04-2... 

Uses Initiator for polymerization, high-temp, curing of polyester resins, and cure of acrylic syrup crosslinking agent for styrene Manuf./Distrib. Aldrich http //www.sigma-aidrich.com... 

Uses Crosslinking agent, reactive diluent, curing agent for UV-cured adhesives, wood fillers, coatings (glass, metal, optical, paper, PVC floor, textile, wood), lacquers, inks, vinyl acrylic latex paint, highly crosslinked polybutadiene rubber, electronics, inks, photopolymers... 

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