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POLYOL [8 records]

Record 1 2014-04-02

English

Subject field(s)
  • Chemical Elements and Compounds
  • Plastics Manufacturing
  • Food Industries
DEF

An alcohol with many hydroxyl (-OH) radicals, such as glycerol ...

French

Domaine(s)
  • Éléments et composés chimiques
  • Plasturgie
  • Industrie de l'alimentation
DEF

Substance obtenue par la réduction de sucres simples ou complexes, dont la fonction aldéhyde ou cétone se trouve ainsi remplacé par un groupement hydroxyle.

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Fabricación de plásticos
  • Industria alimentaria
DEF

Alcohol que tiene muchos grupos hidróxilos.

CONT

Los polioles, también llamados polialcoholes o alcoholes polihídricos, son unos compuestos cuya estructura química se parece en parte a la de los azúcares y en parte a la de los alcoholes. Los polioles más utilizados en alimentación son el sorbitol, manitol, maltitol, xilitol, lactitol, isomaltosa, eritritol, y los almidones hidrolizados hidrogenados.

OBS

En el campo de los plásticos celulares el término poliol incluye compuestos que contienen grupos hidróxilos alcohólicos como poliéteres, glicoles, poliésteres y aceite de castor utilizados en espumas de uretano.

Save record 1

Record 2 2012-07-17

English

Subject field(s)
  • Chemistry
  • Water Treatment (Water Supply)
CONT

[Tannins] containing non-aromatic polyol carbohydrate moieties such as gallic or ellagic acids, are hydrolyzable.

French

Domaine(s)
  • Chimie
  • Traitement des eaux
DEF

Qui est décomposable par hydrolyse (par l'eau).

CONT

[Les glucides] existent sous forme non hydrolysable (oses, tels que le glucose) ou hydrolysable (osides, tels que l'amidon, la cellulose et le glycogène).

Spanish

Save record 2

Record 3 2008-04-22

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Lubrication Technology
CONT

Synthetic fire resistant fluids(ISO HFD) are laboratory synthesized chemicals, which are less flammable than petroleum oils. Typical of these are : Phosphate esters[;] Polyol esters[;] Halogenated(fluorinated and/or chlorinated) hydrocarbons[;] Mixtures of phosphate esters or polyol esters and petroleum oil. Since the synthetics do not contain any water or other volatile material, they operate well at higher temperatures than water containing fluids. They also are suitable for higher-pressure systems than the water containing fluids. Synthetic fire resistant fluids do not operate best in low temperature systems. Auxiliary heating may be required in cold environments.

PHR

Fire resistant phosphate ester hydraulic fluid, fire resistant silicone-base hydraulic fluid.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Tribologie
CONT

Un liquide hydraulique résistant au feu à base d'eau et de glycol d'usage général de première qualité. Applications recommandées : Applications où la tuyauterie du système hydraulique peut se rompre et pulvériser le liquide hydraulique sur des surfaces chaudes, où des liquides à base d'huile minérale peuvent s'enflammer et créer un danger grave. Systèmes hydrauliques mobiles et industriels de précision avec pression jusqu'à 2 000 lb/po² à 50 °C; températures et pressions (3 000 lb/po²) plus élevées possibles [...]

OBS

liquide hydraulique résistant au feu : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance.

Spanish

Save record 3

Record 4 2003-10-29

English

Subject field(s)
  • Chemical Elements and Compounds
  • Chemistry
CONT

If you see a chemical compound with the "ol" as a suffix its an alcohol. You can have a low molecular weight alcohol like methanol(CH3OH) or a high molecular weight alcohol like glycerol(CH2OH·CHOH·CH2OH). What they all have in common is what chemists call a functional group-in this case it's the OH group-called a hydroxyl group. The number of hydroxyl groups determine whether it's an alcohol or a polyol(containing more than one hydroxyl groups). The most common ones are what chemists call the lower alcohols. In order of increasing molecular weight they are :-Methanol.... Ethanol.... Pure,(undenatured) alcohol.... SDA [which] is the most important commercial from of ethanol.... Industrial alcohol.... CDA [which] is completely denatured alcohol.... Propanol.... Butanol.

CONT

The physical properties of alcohols are influenced by the OH group. The lower alcohols are liquids, miscible with water and other hydrogen bonded liquids.

CONT

The lower alcohols, e.g. methanol, ethanol, are water-like liquids. They dissolve well in water, less well in other solvents.

French

Domaine(s)
  • Éléments et composés chimiques
  • Chimie

Spanish

Save record 4

Record 5 1999-11-03

English

Subject field(s)
  • Chemical Elements and Compounds
OBS

Polyol : See "polyhydric alcohol".

OBS

Polyhydric alcohol: An alcohol with many hydroxyl (OH) radicals...

OBS

Esters are derived from acids by the exchange of the replaceable hydrogen of the latter for an organic radical. The usual reaction is that of an acid with an alcohol or other organic compound rich in OH groups.

French

Domaine(s)
  • Éléments et composés chimiques
OBS

Estérification : Transformation sous l'action d'un acide d'un alcool ou d'un phénol en éther-sel ou ester.

OBS

Polyol : Synonyme de «polyalcool».

OBS

Polyalcool : Corps possédant plusieurs fonctions alcool.

OBS

La fonction alcool est caractérisée en chimie organique par le groupe fonctionnel hydroxyle OH [...]

Spanish

Save record 5

Record 6 1998-06-30

English

Subject field(s)
  • Plastics Manufacturing
DEF

In the urethane foam field, term used for a system whereby a portion of the polyol is pre-reacted with the isocyanate to form a liquid prepolymer in a viscosity range suitable for pumping or metering. This component is supplied to end-users with a second premixed blend of additional polyol, catalyst, blowing agent, etc. When the two components are mixed together, foaming occurs.

OBS

prepolymer moulding: term standardized by ISO.

French

Domaine(s)
  • Plasturgie
OBS

moulage à partir de prépolymère : terme normalisé par l'ISO.

Spanish

Save record 6

Record 7 1998-06-30

English

Subject field(s)
  • Plastics Manufacturing
DEF

In the urethane foam field, term applied to a system whereby the isocyanate, polyol, catalyst, and other additives are mixed together directly, and a foam is produced immediately(as distinguished from prepolymer).

OBS

one-shot moulding: term standardized by ISO.

Key term(s)
  • one-shot process
  • one-shot technique

French

Domaine(s)
  • Plasturgie
OBS

moulage en une seule fois : terme normalisé par l'ISO.

Spanish

Save record 7

Record 8 1995-07-14

English

Subject field(s)
  • Plastics Industry
CONT

A new polyether-polyurethane system for the formation of end caps for oil filters is disclosed using a blended oxyalkylene polyol....

Key term(s)
  • polyetherpolyurethane system

French

Domaine(s)
  • Industrie des plastiques
OBS

Mélange de deux polymères.

Spanish

Save record 8

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