Homogenizing resins

When a dibasic acid such as phthalic acid is added, it will esterify the alcoholized oil to form a homogeneous resin ... 

The ability to homogenize resins with widely different molecular weight can be exemplified by UHMWPE/HDPE blends. Addition of high MW polymer is expected to increase G , G , T), and the first normal stress coefficient, Pj. For the linear polymers, these parameters at... 

During the 50 years that have passed since the pubhcation of these classical studies, numerous research groups examined the salt and, in particular, acid retardation processes in ion exchanger, but no new ideas have been suggested for the explanation of the non-trivial phenomenon of electrolytes discrimination. Interestingly, a more or less adequate mathematical description of experimental data is possible both in terms of selfassociation of acids in the homogeneous resin phase and association of acid molecules with the functional groups of the resin [122] and in frames of a two-phase model of the resin bead [123]. However, both approaches are based on the above ideas that have been formulated, considered, and rejected by the pioneers of the method. Indeed, mathematical models may well fit experimental data into equations, but they do not prove the reality of the concept they are based on. 

In a previous section the various steps of species travelling from the bulk fluid through a sorbent particle to find a site of attachment have been described. In the case of homogeneous resins without a permanent pore system the ions have to... 

Unsaturated poly(ester amide) resins were also prepared by reaction between diglycidyl ether of bisphenol-A-based epoxy and unsaturated aliphatic bisamic acids, using a base catalyst (Fig. 5.4). These resins were then blended with styrene to produce homogeneous resin syrups which were cured by using BPO as the free radical initiator. 

The ability to homogenize resins with widely different molecular weight can be exemplified by UHMWPE/HDPE blends. Addition of high MW polymer is expected to increase G, G", t, and the first normal stress coefficient, Pj. For the linear polymers, these parameters at low deformation rates, rjo and Pjo, are proportional to M , and Mw , respectively. Thus, the elasticity is more sensitive to the high MW fractions. For this reason, the frequency dependence of the storage modulus ratio G (blend)/G (PE), at 200 °C, for HOPE and its blends with 3 wt% UHMWPE was measured. The blends prepared in TSE had the worst... 

Currently not possible to separate into homogeneous resins after shredding... 

The principal distinguishing characteristic of the resin used is its particle size, which is small enough (approximately 1 ijim) to permit it to stay in suspension without settling. Another key characteristic is that the resin particle resists solvation at room temperature. Thus it is possible to suspend the resin particles in liquid plasticizer and have the mixture remain in a stable fluid condition indefinitely. The paste can then be shaped and converted to a solid state by heating. This conversion takes place in two steps. The first is gelation at approximately 66°C and the second to a solid where the plasticizer is dispersed in a homogeneous resin matrix (127-177°C). 

Homogenizing resins are low molecular weight polymeric resin blends and are of two types ... 

Use of Homogenizing Resins (40MS/60NS) to Save Energy and Reduce Mixing Cycle, Bulletin No. 2, Schill Seilacher, Hamburg. 

Dry Blending. Phenol-formaldehyde resin still in its resole thermoplastic state is cold-pulverized and then perfectly mixed with fillers and other additives in a two-roll mill heated 80-115°C. Once homogenized, the blend stays on the warmer roll. It is then possible to cut it, since during homogenization, resin condensation continues going partially from resole to resite, and this forms a cohesive layer. Once cold, the blend can be pulverized. 

The fatty acid-oil method is a process in which a mixture of fatty acid, triglyceride oil, glycerol, and phthalic anhydride is processed at normal reaction temperature, and a homogeneous resin results. 

The degree of hardness of alkyd resins has been increased by blending them with low molecular weight acrylic resins. More homogenous resinous coatings have been obtained by blending acrylic acid copolymers with alkyds. These acrylated alkyds dry more rapidly than alkyd coatings, but they are not available commercially. 

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