POLYISOPRENE

Base Information

• Chemical Name: POLYISOPRENE
• CAS No.: 9003-31-0
• Molecular Formula: C₅H₈
• Molecular Weight: 68.1185
• Mol file: 9003-31-0.mol

Synonyms:Isoprene,polymers (8CI); Betaprene H; Isoprene D; Isoprene homopolymer; Isopreneoligomer; Isoprene polymer; JSR-LIR 20000; JSR-PIP 2; KM 4K1; LIR 15; LIR20000; PIP; PIP (polyisoprene); Poly(2-methyl-1,3-butadiene);Poly(2-methylbutadiene); Poly(isopentadiene); Polyisoprene; Revultex Lan 960;TR 301

Chemical Property of POLYISOPRENE

Chemical Property:

• Appearance/Colour: yellow slabs
• Melting Point: 64 °C
• Refractive Index: n20/D 1.521
• Boiling Point: 122-142oC(lit.)
• Flash Point: >230 °F
• PSA: 0.00000
• Density: 0.92 g/mL at 25 °C
• LogP: 1.74850
• Storage Temp.: 2-8°C

Purity/Quality:

98%,99%, ^*data from raw suppliers

Anti-IR antibody produced in rabbit affinity isolated antibody ^*data from reagent suppliers

Safty Information:

• Pictogram(s): T
• Hazard Codes: T
• Statements: 60-61-10-20/21-38
• Safety Statements: 24/25-7/9-45-36/37-16-53

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Description: Polyisoprene is the polymer known as natural rubber, although it can also be manufactured. The natural rubber latex is harvested from the rubber tree, Hevea brasiliensis. This substance has a variety of natural additives, such as proteins and sugars. The polymer from the natural latex is resistant to many solvents and also is easily processed. The synthetic form of this rubber is produced from a pure isoprene solution with a stereospecific isomer to produce the more commonly used cis-l,4 isomer. These rubbers are resistant to abrasion and most solvents and are commercially used in automobile tires, adhesives, and a variety of products that come in close contact with the general public. Their use in baby bottle nipples is a good indication of the extremely low toxicity associated with these elastomers.
• Uses: Natural rubber is a vital, strategic, and irreplaceable raw material used in enormous quantities by the commercial, medical, transportation, and defense industries. At least 40,000 different products and over 400 medical devices contain natural rubber.

Technology Process of POLYISOPRENE

There total 405 articles about POLYISOPRENE which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 57.0%

formaldehyd (50-00-0,30525-89-4,61233-19-0) + isobutene (115-11-7,15220-85-6) → 4-methyl-3,6-dihydro-2H-pyran (16302-35-5) + 4-methyl-3,4-dihydro-2H-pyran (2270-61-3) + 3-methyl-butane-1,3-diol (2568-33-4) + methylcyclopentadiene (96-39-9) + 3,4,4-trimethylcyclohexene (219811-94-6) + isovaleraldehyde (590-86-3) + isoprene (78-79-5,9003-31-0)

Guidance literature:

With niobium phosphate; at 299.84 ℃; for 3.33333h; Temperature;

DOI:10.1016/j.apcata.2012.06.034

Reference yield: 37.0%

carbon monoxide (201230-82-2) + isoprene epoxide (1838-94-4) → 5-methyl-3,6-dihydro-pyran-2-one (60920-98-1) + 2-methylbut-2-enal (497-03-0) + isoprene (78-79-5,9003-31-0)

Guidance literature:

With dicobalt octacarbonyl; at 85 ℃; under 150012 Torr;

DOI:10.1016/S0040-4039(00)82036-5

Reference yield: 32.0%

3-chloro-3-methyl-1-butene (2190-48-9) → 3,3-dimethyl-allyl chloride (503-60-6) + isoprene (78-79-5,9003-31-0)

Guidance literature:

In dimethylsulfoxide-d6; for 96h; Product distribution; Rate constant; Ambient temperature; in NMR tube, estimated rate: 1.8E-6 s^-1; further solv.;

DOI:10.1021/ja00240a029

upstream raw materials:

2-ethyl-2-methyloxirane

4,4-dimethyl-1,3-dioxane

quinoline

Dimethylallene

Downstream raw materials:

2-(4-methyl-3-cyclohexenyl)pyridine

4-(4-methyl-cyclohex-3-enyl)-pyridine

(+/-)-3-methyl-6t-phenyl-cyclohex-3-ene-r-carboxylic acid methyl ester

1,4-dimethylcyclohex-3-ene-1-carboxylic acid

Refernces

• 1、 Munyemana, Fran?ois,Patiny, Luc,Ghosez, Léon. "A mild method for the replacement of a hydroxyl group by halogen: 3. the dichotomous behavior of α-haloenamines towards allylic and propargylic alcohols". . . Retrieved 2021/06/07.
• 2、 -. "Method for preparing isoprene". Paragraph 0039-0111. . Retrieved 2021/04/14.