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POLYMER RETENTION [8 records]

Record 1 2012-10-19

English

Subject field(s)
  • Chemical Elements and Compounds
  • Personal Esthetics
Universal entry(ies)
CONT

Octylacrylamide/Acrylates/Butylaminoethyl Methacrylate Copolymer. Description : Amphomer is an amphoteric acrylic polymer with outstanding curl retention properties. It is a stiff resin with unparalleled holding power for ultimate control in all temperature and humidity conditions.

OBS

Part of cationic system. A fixative that is water soluble if washed within 48 hours after application. Used for stiffness and high gloss in hair sprays.

OBS

Amphomer®: registered trademark.

Key term(s)
  • Amphomer

French

Domaine(s)
  • Éléments et composés chimiques
  • Esthétique et soins corporels
Entrée(s) universelle(s)

Spanish

Save record 1

Record 2 2002-07-02

English

Subject field(s)
  • Chemical Elements and Compounds
  • Hair Styling
CONT

A texture analyzer was employed to study the properties of hairspray resins by measuring a number of mechanical parameters of hair modified by them. Hairset stiffness, stiffness retention at high humidity, and duration and magnitude of polymer film tackiness during drying were the properties employed to characterize fixative-treated hair. They were investigated for formulations containing ethyl ester of PVM/MA copolymer, butyl ester of PVM/MA copolymer, vinyl caprolactam/PVP/dimethylaminoethyl methacrylate copolymer, VA/butyl maleate/isobornyl acrylate copolymer, and polymer blends such as poly(methylvinylether)(PMVE)-ethyl ester of PVM/MA copolymer.

CONT

Omnirez [trademark] 2000 Polymer is a new Ethyl Ester of PVM/MA copolymer developed to meet the challenges of today’s hair fixative industry. It is soluble in 55% VOC systems and anhydrous products.

French

Domaine(s)
  • Éléments et composés chimiques
  • Coiffure

Spanish

Save record 2

Record 3 1995-01-31

English

Subject field(s)
  • Synthetic Fabrics
DEF

Manufactured fiber spun from Hoechst Celanese Vectra liquid crystal polymer. These fibers have high-temperature resistance, high strength and modulus, and high resistance to moisture and chemicals, with good property retention in hostile environments.

Key term(s)
  • fibre vectran

French

Domaine(s)
  • Textiles artificiels et synthétiques
DEF

Fibre manufacturée à partir du polymère de cristal liquide Hoechst Celanese Vectra.

CONT

Les fibres Vectran se caractérisent par leur haut module et leur résistance à la traction élevée. Elles ont une excellente résistance au fluage, à l'humidité et à la corrosion chimique. Vectran présente une bonne résistance au cisaillement, aux frottements et à la fatigue. [...] Ces propriétés permettent d'utiliser les fibres Vectran dans une large gamme d'applications, notamment pour le renforcement des câblages et des cordages, dans le vêtement de protection, les composites évolués, les articles de sports et loisirs, l'électronique et les appareils médicaux de haute technologie.

Spanish

Save record 3

Record 4 1993-03-25

English

Subject field(s)
  • Pulp Preparation (papermaking)
OBS

Because of significant advantages, the kraft process has become established as the world's dominant pulping method. Nonetheless, the process also has some severe shortcomings, principally the low yield from wood, the comparatively high residual lignin content of bleachable grades, and the malodors caused by reduced sulfur compounds.... Most of the earlier modifications were aimed at increased retention of carbohydrates by stabilizing the end groups of the cellulose and hemicellulose polymer chains against "peeling reactions". These reactions cause dissolution of the end groups one unit at a time and consume a significant portion of the cooking chemical.

French

Domaine(s)
  • Préparation de la pâte à papier
OBS

La place prédominante qu'occupe le procédé kraft parmi les méthodes de mise en pâte utilisées dans le monde témoigne bien du nombre d'avantages marqués qu'il offre. Le procédé comporte néanmoins de graves inconvénients dont les principaux sont un faible rendement du bois et les mauvaises odeurs causées par les composés de soufre réduits. (...) La plupart des modifications proposées visent l'obtention d'une meilleure rétention des hydrates de carbone par une stabilisation des monomères de bouts de chaîne des polymères de la cellulose et des hémicelluloses afin d'éviter leur départ. Cette réaction qui consiste en une dissolution successive des monomères de bouts de chaîne consomme une part importante du réactif de cuisson.

Spanish

Save record 4

Record 5 1990-09-28

English

Subject field(s)
  • Technical Textiles
  • Civil Engineering
  • Soil Mechanics (Engineering)
CONT

Biodegradable geotextiles are being used for erosion control and can be based upon many different forms of natural fibre, including paper, wood shavings and jute. Some geotextile suppliers suggest that complete biodegradability is beneficial, while others claim that retention of a lightweight polymer geotextile backing sheet within the soil is better.

CONT

Biodegradable systems. These systems consist of a very open mesh of geotextile with strips of biodegradable paper threaded between the individual fabric yarns. The geotextile is actually a loosely knit fabric and the paper strips are approximately 3/8 in. wide. ... The system comes in rolls and is deployed from the top of the slope to the bottom. ... The key is to select the lifetime of the biodegradable paper slightly greater than the germination time of the vegetation, which has been planted beforehand.

OBS

Geotextile: Any permeable textile used with foundation, soil, rock, earth, or any other geotechnical engineering-related material as an integral part of human-made project, structure, or system.

French

Domaine(s)
  • Textiles techniques
  • Génie civil
  • Mécanique des sols
OBS

géotextile : Tout produit ou article textile perméable, utilisé dans les travaux de génie civil. Tissé, non tissé, tricoté ou composite, le géotextile peut jouer un rôle hydraulique ... ou un rôle mécanique (...)

OBS

biodégradable : Se dit des produits qui peuvent être détruits par des bactéries ou d'autres agents biologiques habituellement présents dans la nature.

Spanish

Save record 5

Record 6 1988-03-30

English

Subject field(s)
  • Rheology
OBS

Martin and Sherwood(1975) related their observations regarding polymer retention and mobility reduction in porous media. They found that polymer retention decreased as the degree of hydrolysis increased.

French

Domaine(s)
  • Rhéologie
CONT

Pour les concentrations plus fortes (...) la relation de Huggins n'est plus applicable et on doit calculer (la viscosité de la solution de polymère) en utilisant la loi empirique de Martin (...)

Spanish

Save record 6

Record 7 1988-03-30

English

Subject field(s)
  • Rheology
CONT

Martin and Sherwood(1975)... related their observations regarding polymer retention and mobility reduction in porous media. They found that polymer reduction decreased as the degree of hydrolysis increased.

OBS

The hydrolyzed polymer has a larger effective diameter which leads to a higher resistance factor or reduced mobility.

French

Domaine(s)
  • Rhéologie
CONT

[...] la mobilité des solutions en milieu poreux est souvent plus faible que celle que l'on attendrait de la seule augmentation de la viscosité. C'est pourquoi on a introduit pour les solutions de polymère la notion de «réduction de mobilité» définie comme la rapport entre la mobilité de l'eau et celle de l'eau additionnée de polymères.

Spanish

Save record 7

Record 8 1988-01-23

English

Subject field(s)
  • Oil Production
  • Research and Development (Petroleum Tech.)
CONT

The most clearly demonstrated reason for reduced permeability in porous media is polymer retention.... polymer solutions which are forced through core samples or simulated reservoir media suffer significant reduction in polymer concentration.

French

Domaine(s)
  • Production pétrolière
  • Recherche et développement (Technol. pétrol.)
CONT

[...] ce mode de calcul est erroné à cause de la dilution de la solution et de la rétention de polymère dans le milieu poreux.

Spanish

Save record 8

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