barium stearate
C2/TechnicalTechnical/Scientific
Definition
Meaning
A chemical compound consisting of the metal barium combined with stearic acid, used primarily as a lubricant and stabilizer in plastics, rubber, and waxes.
In material science, a white, waxy solid that functions as a heat and light stabilizer in PVC processing, a lubricant in metallurgy, and a water-repellent agent in coatings.
Linguistics
Semantic Notes
Always appears as a compound noun. Refers specifically to the chemical salt, not a mixture. The term is precise and used almost exclusively in industrial chemistry, polymer engineering, and materials science contexts.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Potential minor spelling preference: 'stabiliser' (UK) vs. 'stabilizer' (US) in descriptive texts about its function.
Connotations
Neutral technical term in both varieties.
Frequency
Equally low-frequency outside specialized fields in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
[Substance] is stabilised with barium stearate.The [formulation/mix/compound] contains [X]% barium stearate.[Process] requires the addition of barium stearate as a [lubricant/stabiliser].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None. The term is purely technical.”
Usage
Context Usage
Business
Used in procurement, specifications, and safety data sheets for polymer compounds.
Academic
Appears in materials science, polymer chemistry, and industrial chemistry papers.
Everyday
Virtually never used.
Technical
Core term in PVC formulation, plastics engineering, lubricant technology, and specialty chemical manufacturing.
Examples
By Part of Speech
verb
British English
- The compound is then stabilised by **barium stearating** the mixture. (rare, derived)
American English
- The process involves **barium stearating** the polymer melt. (rare, derived)
adjective
British English
- The **barium-stearate**-containing formulation passed the heat test.
- **barium-stearate**-based lubricant
American English
- The **barium-stearate**-stabilized PVC showed less degradation.
- **barium-stearate**-type additive
Examples
By CEFR Level
- This plastic contains **barium stearate** as a stabilizer.
- **Barium stearate** is a common additive in the industry.
- The efficacy of **barium stearate** as a co-stabilizer in rigid PVC formulations was quantitatively assessed.
- Optimal slip properties were achieved by incorporating 0.8 phr **barium stearate** into the polyethylene blend.
Learning
Memory Aids
Mnemonic
Think: 'Barium' (heavy metal, from barite ore) + 'Stearate' (from stearic acid, found in fats). It's a heavy metal soap used to make plastics slippery and stable.
Conceptual Metaphor
A 'metal soap' that 'calms' the polymer during heating, preventing breakdown.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Не переводить дословно как "бариевый стеарат" в непрофессиональном контексте, так как это калька. В техническом контексте это корректно.
- Не путать с "стеарином" (stearin) или просто "стеариновой кислотой" (stearic acid).
Common Mistakes
- Incorrect: 'barium sterate' (misspelling).
- Incorrect: using as a countable noun (e.g., 'a barium stearate'). It's a mass/uncountable noun.
- Incorrect: 'stearate barium' (word order reversal).
Practice
Quiz
What is the primary industrial function of barium stearate?
FAQ
Frequently Asked Questions
Yes, like many barium compounds, it is toxic if ingested or inhaled as dust. It requires appropriate safety handling (gloves, masks) in industrial settings.
Yes, depending on the application. Calcium stearate or zinc stearate are common alternatives, but the choice depends on the required properties (e.g., transparency, stabilization efficiency, cost).
No, barium stearate is insoluble in water but soluble in hot organic solvents like toluene or xylene, which is typical for metallic soaps.
It is typically a fine, white, powdery or waxy solid.