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Chemical name: Chloromethyl styrene
Another name: Vinylbenzyl chloride |
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| CMS is a highly responsive monomer having vinyl and chloromethyl groups in molecules. Because of degree of freedom of application of the responsive (difunctional) monomer, it is used for various purposes as a raw material of high molecular modifiers such as rubber and resin, photographic materials, coupling agents, and various other treatment agents. Furthermore, possibility of a new CMS derivative is infinitely expanding in various fields. |
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| ■Physical Properties of CMS |
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| Appearance |
Slighty yellow transparent liquid (coloring with a polymerization inhibitor) |
| Molecular Weight |
152.62 |
| Boiling point |
229 to 240℃ |
| Freezing point |
-15.5℃ |
| Specific gravity(25℃) |
1.09 to 1.10 |
| Viscosity cps(25℃) |
1.8 to 1.9cps |
| Refraction index nD25 |
1.57 |
| Surface tension |
38mn/m |
| Solubility |
H2O inCMS |
0. 07g/l |
| CMS inH2O |
0.6g/l |
| Flash poin(CMS-14) |
107(108℃) |
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| CMS has two types of isomeric forms – meta isomer and para isomer. As the products, there are two product types: CMS-P which is a mixture of meta and para isomers and CMS-14 which mainly consists of para isomer. |
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| ■ Chemical Properties of CMS |
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CMS-P |
CMS-14 |
| Purity |
CMS |
95% or more |
95% or more |
| Impurities |
∀-chloromethyl styrene
dichloro-form |
2% or below
2% or below |
2% or below
2% or below |
| Isomer ratio |
Meta
Para |
45 to 55
45 to 55
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5
95 |
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■Reactivity of CMS
CMS has two reactive groups - vinyl and chloromethyl groups - and can induce high functionality, high molecules in two ways. |
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| (1) |
One way is to obtain functionality high molecules by making monomers’ chloromethyl group react and, after obtaining functionality monomers, polymerizing them (A → D). |
| (2) |
Another way is, after CMS is polymerized, to induce functionality high molecules by polymer reaction (B → C). Both reactions easily progress.
In these ways, the processes of obtaining functionality high molecules by using CMS as the starting material can be selected according to purposes. |
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■Application of CMS
Ion-exchange membrane, silane coupling agent, resin modifier, rubber modifier, photographic material, photosensitive material, etc |
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| United Nations classification: |
Class 6.1 |
| United Nations number: |
2810 |
| Packing Group: |
P.GⅢ |
| Act on the Evaluation of Chemical Substances and Regulation of Their Manufacture, etc: |
3-46 |
| Fire Service Act : |
Hazardous material, fourth group,
third class petroleum (non-water-soluble material) |
| CAS NO, : |
30030-25-20(CMS-P),1592-20-7(CMS-14) |
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| We developed QBm as the CMS derivative. QBm is a monomer changed into quaternary ammonium salt to the chloromethyl group. |
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| We developed QBm as the CMS derivative. QBm is a monomer changed into quaternary ammonium salt to the chloromethyl group. |
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| (1) |
Molecular weight: |
211.74 |
| (2) |
Outer appearance: |
white powder |
| (3) |
Melting point |
160℃ |
| (4) |
Solubility |
soluble to water |
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■Purposes
Ion-exchange membrane, ion-exchange resin, antistats, high molecule modifier, flocculant, dispersant, surface modifier |
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■Caution for handling
Because of the very high moisture-absorbency, the products should be preserved in a darkroom with low temperature and low moisture. |
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