Modified sulfur, method for preparing same, apparatus for preparing same, and use thereof

Patent metadata

Field	Value
Publication number	US-2019185321-A1
Application number	US-201916246798-A
Country	US
Kind code	A1
Filing date	Jan 14, 2019
Priority date	Jun 22, 2012
Publication date	Jun 20, 2019
Grant date	—

Abstract

Disclosure relates to modified sulfur, preparation method thereof, preparation equipment thereof. The modified sulfur has spinnability or includes micro-structures such as fiber-, film- and network-like structure. The modified sulfur can be prepared by inducing polymerization with ultrasonic or ageing. The modified sulfur has various excellent features such as anticorrosiveness, waterproofing, strength, and fast drying and can control the features depending on its viscosity or polymerization degree. In addition due to the above features, the modified sulfur can be applied to anticorrosive or waterproofing material and can prepare anticorrosive or waterproofing material which has good workability, hardening, salt spray resistance, and weldability exceeding a certain level, and specially improved adhesiveness. Furthermore, when applying the modified sulfur to asphalt composition, gelation and depression are reduced, properties such as bending strength and tensile strength are improved, and it is possible to obtain asphalt composition with good working stability at RT.

First claim

What is claimed is:

1 . A method for preparing modified sulfur comprising:
mixing 100 parts by weight of sulfur with 1˜300 parts by weight of dicyclopentadiene-based modifier and melting them at 120 or higher to prepare the first mixture; polymerizing the first mixture at 120 or higher to prepare the first reactant; and terminating the polymerization of the first reactant at the end point of the reaction to prepare modified sulfur, wherein the end point of the reaction is between the time when the first reactant obtains spinnability and the time when rubberization of the first reactant occurs, and wherein the modified sulfur prepared after the terminating has 3,000˜2,000,000 cP of viscosity at 135 and comprises micro-structures such as fiber, film, or network structure, or has spinnability.

2 . The method of claim 1 , wherein the first mixture, the first reactant, and their combinations may further comprise an initiator, and
wherein the initiator is 0.1˜200 parts by weight, based on 100 parts by weight of the sulfur.

3 . The method of claim 1 which further comprises ageing the first reactant between the said polymerizing and terminating,
wherein the ageing is performed by leaving it at 40 or higher.

4 . The method of claim 2 , wherein the initiator comprises at least one selected from the group consisting of trans cinnamaldehyde, dimethylaniline, dibuthylphthalate, diiodomethane, isobutylaldehyde, methacylamide, diethylaniline, rongalite, nitroethane, formaldehyde hydrate, phenylacetamide, benzyl acetate, dodecyl benzene sulfonic acid, trioctyl amine, methylmorpholine, morpholine, dimethylaniline, napthalene and their combinations.

5 . A method for preparing modified sulfur comprising:
preparing a mixture comprising 100 parts by weight of sulfur, 1˜300 parts by weight of dicyclopentadiene-based modifier, and 0.1˜200 parts by weight of initiator; sonicating the mixture with ultrasonic to prepare a reactant; and ageing the reactant at 40 or higher to prepare the modified sulfur, wherein the modified sulfur has 3000˜2000,000 cP of viscosity and comprises micro-structures such as fiber, film, or network structure, or has spinnability.

6 . The method of claim 5 , wherein the initiator comprises at least one selected from the group consisting of trans cinnamaldehyde, dimethylaniline, dibuthylphthalate, diiodomethane, isobutylaldehyde, methacylamide, diethylaniline, rongalite, nitroethane, formaldehyde hydrate, phenylacetamide, benzyl acetate, dodecyl benzene sulfonic acid, trioctyl amine, methylmorpholine, morpholine, dimethylaniline, napthalene and their combinations.

7 . The method of claim 5 , wherein the sonicating is performed at 120 or lower.

8 . The method of claim 5 , wherein the sulfur is powder or melted at 120 or higher.

9 . The method of claim 5 , wherein the modified sulfur is prepared in continuous manner using continuous type equipment for preparing modified sulfur comprising a reaction part where the sonicating is performed and an ageing part into which the reactant discharged from the reaction part is flown.

10 . The method of claim 5 , wherein the preparing is performed by putting materials comprising 100 parts by weight of sulfur, 1˜300 parts by weight of dicyclopentadiene-based modifier, and 0.1˜200 parts by weight of initiator into a material inlet of the equipment for preparing modified sulfur;
wherein the sonicating is performed by putting a mixture comprising the said materials into the reaction part connected with the material inlet and then treating the mixture with ultrasonic generated in an ultrasonic irradiator installed in the reaction part so that a reactant is formed by reacting solid sulfur included in the mixture with the dicyclopentadiene-based modifier by cavitation that minute bubbles are formed and destructed again; and
wherein the ageing is performed by ageing the reactant flown into the ageing part from a reactant inlet connected with the reaction part to prepare the modified sulfur, and obtaining the modified sulfur prepared in continuous manner using at least one outlet part located sequentially from the reactant inlet.

Assignees

• Korea Inst Sci & Tech

Inventors

• Kim Goo Dae
• Park No Gyung
• Kwon Hyok
• Seo Young Sik
• Yu Seung Gun
• Noh Hyuk Rae

Classifications

• B01J2219/00051

  Controlling the temperature · CPC title

• C09D145/00

  Coating compositions based on homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic system; Coating compositions based on derivatives of such polymers (based on polymers of cyclic esters of polyfunctional acids C09D131/00; based on polymers of cyclic anhydrides or imides C09D135/00) · CPC title

• B01J8/16

  with particles being subjected to vibrations or pulsations (B01J8/40 takes precedence) · CPC title

• C09D7/61

  inorganic · CPC title

• C09D5/08

  Anti-corrosive paints · CPC title