acetal

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  • noun

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any organic compound formed by adding alcohol molecules to aldehyde molecules

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An experiment in which polychloroprene and a cyclic acetal, both dissolved carbon tetrachloride, were exposed to ozone showed that the double bonds of the elastomer were not attacked before approximately 90% of the double bonds of the antiozonant had reacted (figure 1) (ref.
Finally, it was shown that the simultaneous reaction procedure can be used to generate a variety of polyvinyl acetals from aldehydes of various chemical nature.
On the demand side, exporters and strategic planners focusing on acetals, hemiacetals, and their halogenated, sulfonated, nitrated, or nitrosated derivatives in the United States face a number of questions.
However, degradation of acetal that occurs in the solid state takes place slowly enough to produce a substantial amount of intermediate chain lengths.
The toughened POM alloy is said to provide the same high chemical resistance and low fuel permeability ratio found in unfilled acetals.
My first exposure to the prolonged shrinkage process exhibited by some materials came when i was molding large parts in acetal homopolymer.
According to Ticona, Hostaform WR140LG retains all the benefits associated with acetal, including durability, creep resistance, dimensional stability, chemical resistance, and flowability.
Since acetals are highly crystalline, they must be heated above their melting point to be processed.
For parts that must withstand higher temperatures or more aggressive chemicals than standard nylons and acetals can, DuPont offers two new Zytel HTN highperformance PPA-based polyamide resins.
Aartel acetal copolymers include general-purpose, impact-modified, and antimicrobial grades.
Deirin "Decorating Solutions" overcome past limitations experienced in the decoration of acetals through the ability of its Deirin acetal resins to accept painting, printing, plating, foil stamping, and in-mold decoration, says DuPont.
This specialty grade can provide 60[degrees] gloss less than 3%, and it undergoes relatively little appearance change after extended uv exposure and does not form a chalky residue on the surface like many weatherable acetals.
Said to be the first acetal developed specifically for commercial meltblown nonwoven fabrics, Celcon acetal copolymer grade FG40U01 is designed to exceed conventional acetals in the ability to provide greater stability in extrusion on both older and the most up-to-date equipment, especially equipment for processing polypropylene (PP).
Heat-sensitive materials like PVC, ABS, and EVOH, or engineering resins like acetals, PC, nylon, or polyesters are more likely to degrade than heat-tolerant polyolefins.
Carrier resins match end-user resins and include PE, PP, PS, ABS, PVC, SAN, nylon, acrylic, acetals, PUR, K-resin, EVA, propionate, butyrate, and elastomers.