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urethanes

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Published: 01 June 2012
Fig. 2 Structure of urethane dimethacrylate (UDMA) monomer More
Image
Published: 15 May 2022
Fig. 18 Dynamic mechanical properties of a cylindrical urethane foam sample; 6.60 mm (0.26 in.) diameter, 6.28 rad/s frequency More
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006011
EISBN: 978-1-62708-172-6
...Abstract Abstract Polyurethane is any polymer consisting of a chain of repeating organic units joined by urethane linkages. Polyurethane polymers are formed through step-growth polymerization by making a monomer containing at least two isocyanate functional groups to react with another monomer...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005672
EISBN: 978-1-62708-198-6
... types of curable adhesives used for medical device assemblies, including acrylics, cyanoacrylates, epoxies, urethanes, and silicones. Other forms of adhesives, such as hot melts, bioadhesives, and pressure-sensitive adhesives, are also discussed. The typical characteristics and applications...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003692
EISBN: 978-1-62708-182-5
..., and those deposited by evaporation of water, a class of coatings called water-borne coatings. The coatings that chemically cross link by copolymerization, including epoxies, unsaturated polyesters, urethanes, high-temperature curing silicones, and phenolic linings, are also described. hardening...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005354
EISBN: 978-1-62708-187-0
...-setting organic binders, namely, furan no-bake resins, phenolic no-bake resins, and urethanes. The article provides an overview of gas-cured organic binders. It also illustrates the three commercial systems for sand reclamation: wet reclamation systems, dry reclamation systems, and thermal reclamation...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005687
EISBN: 978-1-62708-198-6
... Poly(ether urethane) ASTM F624 Polyether urethane PEU Spinal Catheters—accessories; pacemakers Poly(carbonate urea) urethane ASTM D3935, ASTM F624 Poly(carbonate urethane) ASTM D3935, ASTM F624 Polycarbonate urethane PCU Spinal Catheters; grafts; bypass devices Poly(ether...
Image
Published: 01 June 2012
Fig. 2 Scanning electron micrograph of primary human osteoblasts on the surface of a calcium-phosphate-coated poly (carbonate urethane) substrate. Courtesy of D.H. Barnes More
Image
Published: 31 August 2017
Fig. 34 Two views of complex gas porosity resulting from the mold (no-bake, phenolic, urethane)-metal and wet refractory reactions. Used with permission from Ref 13 More
Image
Published: 31 August 2017
Fig. 5 Classification of binder systems used in cast iron production. FRC, free radical cure; PUCB, phenolic urethane cold box; PECB, Ester-cured phenolic cold box More
Image
Published: 01 June 2012
Fig. 1 Scanning electron micrograph of a calcium phosphate coating on the surface of a poly (carbonate urethane) substrate, formed by immersion in a concentrated simulated body-fluid-like solution. Courtesy of D.H. Barnes More
Image
Published: 31 August 2017
Fig. 6 Change in skin features as a function of the distance from the mold-metal interface for spheroidal graphite (SG) iron 6 mm (0.24 in.) plates (3.67% C, 2.92% Si, 0.04% Mg) poured in alkyd-urethane resin-bonded molds. (a) Graphite shape and area. (b) Percent pearlite and microhardness More
Image
Published: 01 January 2003
Fig. 7 Impedance spectra for coated steel exposed to natural seawater for 1, 4, and 7 months at Port Hueneme, CA. (a) Zinc primer, epoxy polyamide midcoat, urethane topcoat. (b) Zinc primer, epoxy polyamide, midcoat, latex topcoat. (c) Epoxy polyamide primer and midcoat, latex topcoat. (d) Epoxy More
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003048
EISBN: 978-1-62708-200-6
... to or greater than ±25%. Sealants in this class are chemically curing elastomers. The families include urethanes, the best of the acrylics, polyether-modified silicones, polysulfides, and silicones. In building construction, these sealants are usually intended for use in exterior high-movement applications...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001278
EISBN: 978-1-62708-170-2
..., which in turn was copolymerized with various other acrylate monomers to yield an acrylic polyol with urethane-modified polycaprolactone in the side chains. These polyols could be cured with N-butoxymethylacrylamide, melamine formaldehyde resin, or polyisocyanate to produce materials with good hardness...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005242
EISBN: 978-1-62708-187-0
... obsolete) Organic no-bake molding with binders based on acid-cured resins of furan or resoles (phenolic), alkaline phenolic (phenolic ester), acrylic epoxies, and phenolic urethane, which is probably the most significant in North America Thermally cured organic binders such as alkyd oil (also known...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006037
EISBN: 978-1-62708-172-6
... of Epoxy Resins , Ref 13 .) Epoxies can be formulated to be elastomeric, but urethanes are inherently superior in that formulation territory. Fig. 15 Amine-cured epoxy reaction. Primary and secondary amine groups will react with epoxides until tertiary amine cross links are formed. These reactions...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001325
EISBN: 978-1-62708-170-2
... solvent-based materials. Waterborne Topcoats To date, waterborne topcoats have been limited to single-package emulsions, which are most often used as replacements for solvent-based lacquers. However, one manufacturer has developed a two-package aliphatic urethane resin system that shows promise...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006051
EISBN: 978-1-62708-172-6
... Polyurethanes (aromatic or aliphatic) Aliphatic urethanes are noted for their chemically excellent gloss, color, and ultraviolet light resistance. Properties vary widely, depending on the polyol coreactant. Generally, chemical and moisture resistances are similar to those of polyamide-cured epoxies...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005140
EISBN: 978-1-62708-186-3