POLY(METHYL ACRYLATE) Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R11:Leichtentzündlich.
R38:Reizt die Haut.
R48/20:Gesundheitssch?dlich: Gefahr ernster Gesundheitssch?den bei l?ngerer Exposition durch Einatmen.
R63:Kann das Kind im Mutterleib m?glicherweise sch?digen.
R65:Gesundheitssch?dlich: kann beim Verschlucken Lungensch?den verursachen.
R67:D?mpfe k?nnen Schl?frigkeit und Benommenheit verursachen.
S-S?tze Betriebsanweisung:
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S46:Bei Verschlucken sofort ?rztlichen Rat einholen und Verpackung oder Etikett vorzeigen.
S62:Bei Verschlucken kein Erbrechen herbeiführen. Sofort ?rztlichen Rat einholen und Verpackung oder dieses Etikett vorzeigen.
Chemische Eigenschaften
clear liquid
Verwenden
PMA/methylamine borane (MeAB) composites, prepared by solution blending process finds uses as a hydrogen storage material with better dehydrogenation property compared to MeAB.
synthetische
The structure of methyl acrylate is H2C=CH-COOCH3. The monomer used to prepare poly(methyl acrylate) is produced by the oxidation of propylene. The resin is made by free-radical polymerization initiated by peroxide catalysts and has the following formula:
Poly(methyl acrylate) resins vary from soft, elastic, film-forming materials to hard plastics.
Definition
ChEBI: An acrylate macromolecule composed of repeating methoxycarbonylethylene units.
Vorbereitung Methode
Prepared by the polymerization of acrylic and methacrylic acids or
their esters, e.g. butyl ester or dimethylaminoethyl ester
Sicherheit(Safety)
Polymethacrylate copolymers are widely used as film-coating
materials in oral pharmaceutical formulations. They are also used
in topical formulations and are generally regarded as nontoxic and
nonirritant materials.
Based on relevant chronic oral toxicity studies in rats and
conventionally calculated with a safety factor of 100, a daily intake
of 2–200 mg/kg body-weight depending on the grade of Eudragit
may be regarded as essentially safe in humans.
Lager
Dry powder polymer forms are stable at temperatures less than
30°C. Above this temperature, powders tend to form clumps,
although this does not affect the quality of the substance and the
clumps can be readily broken up. Dry powders are stable for at least
3 years if stored in a tightly closed container at less than 30°C.
Dispersions are sensitive to extreme temperatures and phase
separation occurs below 0°C. Dispersions should therefore be
stored at temperatures between 5 and 25°C and are stable for at
least 18 months after shipping from the manufacturer’s warehouse
if stored in a tightly closed container at the above conditions.
l?uterung methode
Precipitate it from a 2% solution in acetone by addition of water.
Inkompatibilit?ten
Incompatibilities occur with certain polymethacrylate dispersions
depending upon the ionic and physical properties of the polymer
and solvent. For example, coagulation may be caused by soluble
electrolytes, pH changes, some organic solvents, and extremes of
temperature. For example, dispersions of Eudragit L 30
D, RL 30 D, L 100-55, and RS 30 D are incompatible with
magnesium stearate. Eastacryl 30 D, Kollicoat MAE 100 P, and
Kollicoat MAE 30 DP are also incompatible with magnesium
stearate.
Interactions between polymethacrylates and some drugs can
occur, although solid polymethacrylates and organic solutions are
generally more compatible than aqueous dispersions.
Regulatory Status
Included in the FDA Inactive Ingredients Database (oral capsules
and tablets). Included in nonparenteral medicines licensed in the
UK. Included in the Canadian List of Acceptable Non-medicinal
Ingredients.
POLY(METHYL ACRYLATE) Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
