TERMIUM Plus®

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HEAT STABILIZER [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-03-14

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
Zn[SC(S)N(C2H5)2]2
formula, see observation
14324-55-1
CAS number
OBS

Properties : White powder... soluble in carbon disulfide, benzene and chloroform; insoluble in water.... Use : Rubber vulcanization accelerator, especially latex foam; heat stabilizer for polyethylene.

OBS

Chemical formula: Zn[SC(S)N(C2H5)2]2

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
Zn[SC(S)N(C2H5)2]2
formula, see observation
14324-55-1
CAS number
OBS

Le préfixe «N» s'écrit en italique.

OBS

Formule chimique : Zn[SC(S)N(C2H5)2]2

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
Entrada(s) universal(es)
Zn[SC(S)N(C2H5)2]2
formula, see observation
14324-55-1
CAS number
OBS

Fórmula química: Zn[SC(S)N(C2H5)2]2

Save record 1

Record 2 2011-03-14

English

Subject field(s)
  • Chemical Elements and Compounds
Universal entry(ies)
Zn(C18H35O2)2
formula, see observation
557-05-1
CAS number
OBS

Properties :(pure substance) White, hydrophobic powder free from grittiness; faint odor;... Use : Cosmetics, lacquers, ointments; dusting powder, lubricant, mold-release agent, filler, antifoamer, heat and light stabilizer, medicine(dermatitis), tablet manufacture, dietary supplement.

OBS

Percentage of zinc may vary according to intended use, some products being more basic than others.

OBS

Chemical formula: Zn(C18H35O2)2

French

Domaine(s)
  • Éléments et composés chimiques
Entrée(s) universelle(s)
Zn(C18H35O2)2
formula, see observation
557-05-1
CAS number
OBS

Formule chimique : Zn(C18H35O2)2

Spanish

Save record 2

Record 3 2006-04-03

English

Subject field(s)
  • Chemical Elements and Compounds
  • Plastics Manufacturing
  • Rubber
  • Paints and Varnishes (Industries)
DEF

Any chemical compound that, admixed with a thermoplastic resin, selectively absorbs ultraviolet rays; used to prevent ultraviolet degradation of polymers.

CONT

When a polymer absorbs light, it may reradiate the absorbed energy at much longer wave lengths(heat), at slightly longer wave lengths(luminescence), or the energy may be transferred to another molecule. When none of these processes is operative, the absorbed light energy may cause bond breaking leading to degradation. By incorporating an ultraviolet absorbing compound into the plastic, it is possible to essentially eliminate all of the above processes, since the absorber even at concentrations as low as 0. 5% can effectively compete for the incident ultraviolet radiation, thus protecting the plastic form degradation. A second approach to stabilization is to incorporate an additive which, though not an absorber in itself, can accept energy from the polymer substrate, and thus, leave the polymer intact. Since protection of plastics against light degradation can be achieved by these two mechanisms, the broader term "ultraviolet stabilizer" or "light stabilizer" is used to refer to such additives.

French

Domaine(s)
  • Éléments et composés chimiques
  • Plasturgie
  • Caoutchouc
  • Peintures et vernis (Industries)
DEF

Produit chimique que l'on ajoute à un matériau macromoléculaire (matière plastique, élastomère, fibre) pour le protéger contre l'action dégradante des rayons ultraviolets.

CONT

Le principe de l'agent anti-UV est d'absorber l'énergie reçue sans réémettre dans le visible. Les principaux produits utilisés sont la benzophénone et le benzotriazol. Il faut noter également que l'introduction de certains pigments (oxydes métalliques, noir de carbone) favorise la résistance aux UV de même que l'application d'un revêtement (peinture).

OBS

ultraviolet : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2006).

OBS

agent anti-UV : terme normalisé par l'AFNOR.

Key term(s)
  • agent anti U.V.
  • agent anti-ultraviolet
  • anti-ultraviolet
  • stabilisant ultraviolet

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Fabricación de plásticos
  • Caucho
  • Pinturas y barnices (Industrias)
Save record 3

Record 4 1987-10-26

English

Subject field(s)
  • Plastic Materials
CONT

Chlorine-containing polymers such as poly(vinyl) chloride), vinyl chloride copolymers, and poly (vinylidene chloride) tend to lose hydrogen chloride when heated or exposed to ultraviolet (UV) radiation. Hydrocarbon polymers containing tertiary carbon atoms such as polypropylene and polystyrene are also susceptible to thermal and UV degradation.... Antioxidants, discussed in the previous section, are usually effective heat and ultraviolet stabilizers for polypropylene.

French

Domaine(s)
  • Matières plastiques
DEF

(...) substances qui, pendant l'utilisation des matières plastiques garantissent surtout leur stabilité à la chaleur (...)

CONT

On les utilise principalement dans la fabrication du PVC; à ce propos, par suite du développement toujours croissant des applications en PVC rigide ainsi que des lois et règlements sévères concernant la sécurité du personnel préposé à ce travail quant à la toxicité et à l'écologie, les chercheurs ont dû envisager la production de nouveaux types de stabilisants thermiques pour PVC.

Spanish

Save record 4

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