Patent
Paintbrush embedment compound and paintbrush construction and method embodying same
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TLDR
An embedment compound is a polyurethane composition having a crosslink density sufficient to render such compound acceptably resistant to all paint solvents as discussed by the authors. But it is difficult to measure the performance of embeddings.Abstract:
An embedment compound for a paintbrush or the like, together with a paintbrush construction and method of manufacture embodying the improved embedment compound. The embedment compound is a polyurethane composition having a crosslink density sufficient to render such compound acceptably resistant to all paint solvents. For example, a typical embodiment composition comprises a blend of Mondur MR with a prepolymer prepared from Pluracol TP-440 and Isonate 143L, and the blend cured at 100° C. overnight.read more
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Elastomeric articles free from reinforcing elements
TL;DR: Pneumatic tires and other elastomeric articles subject to tensile stress and dynamic flexure in service, are made from elastomers having, in the cured state, a molecular weight between covalent cross-links of 5,100 - 40,000, and a molecular value between electrostatic crosslinks of 800 - 5,000 as mentioned in this paper.
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