منابع مشابه
Polyurethane Adhesives and Sealants Based on Hydrophobic Polyols
Thermosetting polyurethane polymers are staples of adhesive and sealant formulations used in a variety of industrial applications. Polyurethane materials generally provide reliable service under most application conditions, but the long-term performance and durability of some polyurethanes can be compromised by direct and prolonged contact with bulk water or high ambient humidity. The Dow Chemi...
متن کاملEffect of Tannin Addition on the Rheological Properties of Starch-based Adhesives
Starch-based adhesives play a relevant role in paperboard production and are becoming more and more interesting, for different uses, because they are based on renewable biopolymers. Starch modifications or additive addition are becoming frequent to obtain the macroscopic properties desired for specific uses. In this paper the effects of the addition of four different tannins on a typical adhesi...
متن کاملComparison of the effect of cyanoacrylate- and polyurethane-based adhesives on a longitudinal strain solitary wave in layered PMMA waveguides
We study the effect of two types of adhesive bonding on the propagation of a localized longitudinal strain wave in twoand three-layered elastic bars. The detectable variation of the decay rate of the wave at relatively long distances of propagation is observed. It is proposed that such variation can be used as an indicator of the type of an interface. PACS numbers: 46.40.Cd, 62.30.+d, 43.25.Rq,...
متن کاملHyperbranched Polyglycerols with Bisphenol a Core as Glycerol-derived Components of Polyurethane Wood Adhesives
Two hyperbranched polyglycerols (HBPGs) and one oligoglycerol containing bisphenol A in the core of the molecule were synthesized from glycerol carbonate and applied as polyols in 2-component polyurethane adhesive systems. It was shown that mechanical performance of the joints made in solid wood depended on the hydroxyl functionality of the polyglycerol as well as on the type of the isocyanate ...
متن کاملWaterborne polyurethane-acrylic hybrid nanoparticles by miniemulsion polymerization: applications in pressure-sensitive adhesives.
Waterborne polyurethane-acrylic hybrid nanoparticles for application as pressure-sensitive adhesives (PSAs) were prepared by one-step miniemulsion polymerization. The addition of polyurethane to a standard waterborne acrylic formulation results in a large increase in the cohesive strength and hence a much higher shear holding time (greater than seven weeks at room temperature), which is a very ...
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ژورنال
عنوان ژورنال: Journal of Applied Polymer Science
سال: 1979
ISSN: 0021-8995,1097-4628
DOI: 10.1002/app.1979.070230631