Chi Mei Corporation

Kuei-Lun Cheng

Chih-Cheng Lee

Kuan-Lin Hsieh

Chen-Pao Huang

A rubber composition and a method for manufacturing the same are provided. The rubber composition includes a main chain modified conjugated diene based polymer and a stabilizer. A weight ratio of the main chain modified conjugated diene based polymer to the stabilizer is 100:0.2&#x2dc;2. The stabilizer has a structural formula of: 

Rubber composition and manufacturing method for the same

Provided is a polymerization method of a modified copolymer of conjugated diene and vinyl aromatic hydrocarbon. A multi-functional vinyl benzene-based compound is reacted with an organic alkali metal compound to form a star shaped compound with multiple active sites. A conjugated diene monomer, a vinyl aromatic hydrocarbon monomer, and the star shaped compound with multiple active sites are reacted with each other to form a copolymer of conjugated diene and vinyl aromatic hydrocarbon. The copolymer of conjugated diene and vinyl aromatic hydrocarbon is then reacted with a modifier to form the modified copolymer of conjugated diene and vinyl aromatic hydrocarbon. The modifier is represented by formula 1, 

Modified copolymer of conjugated diene and vinyl aromatic hydrocarbon and polymerization method thereof

The present invention relates to a polysiloxane compound having a structure represented by formula 1: 

Polysiloxane compound, modified conjugated diene-vinyl aromatic copolymer and preparing method thereof

Provided is a synthesis method of a modified conjugated diene polymer. Conjugated diene monomers are reacted in a reaction system. A modifier is added into the reaction system while the reaction proceeds to a predetermined extent. The modifier has a structure represented by formula (1): wherein R-Reach independently represent a C-Calkyl group; 1&#x2266;m&#x2266;300; 0&#x2266;a&#x2266;65; 0&#x2266;b&#x2266;65; 0&#x2266;c&#x2266;40; 0&#x3c;a+b; 0&#x2266;c/(a+b+c)&#x2266;0.8; the X and Y are structures respectively represented by formula (2) and formula (3): wherein R, R, and Reach independently represent a C-Calkylene group and R-Reach independently represent a C-Calkyl group.

Modified conjugated diene polymer and synthesis method thereof

The invention discloses a terminal-modified conjugated diene-vinyl aromatic copolymer and a method for manufacturing the same. The method comprises the following steps. An organic alkali metal initiator is added into a first mixture containing a conjugated diene monomer and a vinyl aromatic hydrocarbon monomer to perform reaction to obtain a conjugated diene-vinyl aromatic copolymer with active terminal. The conjugated diene-vinyl aromatic copolymer with active terminal reacts with polysiloxane to obtain a terminal-modified conjugated diene-vinyl aromatic copolymer. The aforementioned polysiloxane is expressed as chemical formula (I): R1, R2, R3 and R5 independently are alkyl group with 1&#x2dc;20 carbon atoms. R4 is selected from one of alkyl group, alkoxy group or hydroxyl group with 1&#x2dc;5 carbon atoms, m is an integer of 2&#x2dc;50, and n is an integer of 0&#x2dc;50.

Terminal-modified conjugated diene-vinyl aromatic copolymer and method for manufacturing the same

A modified conjugated diene copolymer and a preparing method for the same are provided. The method comprising a polymerization step for polymerizing conjugated diene monomers to form a conjugated diene polymer; and a modifying step for reacting the conjugated diene polymer with a modifier to form a modified conjugated diene polymer. The modifier includes a polythiol ester compound, a polythiol alkane compound or a combination thereof, the polythiol ester compound has a chemical formula (I):R-(O&#x2014;C(&#x2550;O)R-SH)&#x2003;&#x2003;(I). The polythiol alkane compound has a chemical formula (II):HS&#x2014;(CH)&#x2014;(R)CHSH&#x2003;&#x2003;(II).

Modified high CIS conjugated diene copolymer and preparing method of the same

A modified conjugated diene polymer and a manufacturing method for the same are provided. The modified conjugated diene polymer is manufactured by the method including, forming a conjugated diene polymer by a polymerization step and making it react with a first modifier and then react with a second modifier. The modified conjugated diene polymer has over 97% of cis-1,4 structure. A PDI of the modified conjugated diene polymer is bigger than 1.8 and smaller than 2.5. The first modifier has a chemical formula of X&#x2014;R1-Si(R2). The second modifier has a chemical formula of R3-Si(R4).

Modified high cis conjugated diene copolymer and manufacturing method of the same

A modified conjugated diene-vinyl aromatic copolymer and a method for manufacturing the same are provided. The modified conjugated diene-vinyl aromatic copolymer is formed by modifying a conjugated diene-vinyl aromatic copolymer by reacting with a first modifier in a solvent and then reacting with a second modifier. The solvent includes an organic alkali metal initiator.

Modified conjugated diene-vinyl aromatic copolymer and method for manufacturing the same

A modified conjugated diene-vinyl aromatic copolymer and a method for manufacturing the same are provided. The modified conjugated diene-vinyl aromatic copolymer is formed by modifying a conjugated diene-vinyl aromatic copolymer by reacting with a first modifier in a solvent and then reacting with a second modifier. The solvent contains an organic alkali metal initiator. The first modifier is expressed as chemical formula (I):  The second modifier is expressed as chemical formula (II): 

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Tainan, Taiwan

Kuei-Lun Cheng