Method of grafting and modifying rubber latex containing poly conjugated dialkene by in situ hybridization of silicon

A technology of polyconjugated diene and conjugated diene, which is applied in the field of silicon in-situ graft hybridization modification latex containing polyconjugated diene, can solve the problems of unstable emulsion, complicated operation process, etc. Not tight, avoid the effect of easy agglomeration

Active Publication Date: 2011-04-20
PETROCHINA CO LTD
View PDF6 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific technical scheme is: first mix the mixture of block copolymer and zinc oxide with organosilane in the extruder, then use peroxide to degrade the polymer and initiate the silanization reaction at a temperature not lower than 140°C, and finally After a period of mixing, the grafting reaction of the entire silane is completed. The operation process of this method is complicated. At the same time, under high temperature conditions, the graft modifier is likely to self-polymerize and affect the graft polymerization re...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of grafting and modifying rubber latex containing poly conjugated dialkene by in situ hybridization of silicon
  • Method of grafting and modifying rubber latex containing poly conjugated dialkene by in situ hybridization of silicon
  • Method of grafting and modifying rubber latex containing poly conjugated dialkene by in situ hybridization of silicon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 50g of dry glue SBR1500 latex and 8g of VTES into a four-necked flask, stir and mix well, heat up to 68°C, then add dropwise a mixed solution of 0.1g of benzoyl peroxide and 50g of abietic acid soap (concentration: 22%) , reacted under stirring conditions for 350 minutes; after the reaction, the system was cooled down, and then the latex was coagulated and vacuum-dried. After testing, the utilization rate of VTES can reach 90.4%. Compared with the unmodified raw rubber tensile strength (196.2kpa) and Mooney viscosity (56), the modified raw rubber tensile strength is 238.8kpa, an increase of 21.7%. , Mooney viscosity 62.9, only increased by 12.7%. SEM test shows that there are no large particles of silica in the modified compound.

Embodiment 2

[0041] Add 45g of dry glue SBR1500 latex and 2.5g of MPTS into a four-neck flask, stir and mix well, heat up to 65°C, then add 0.13g of benzoyl peroxide, and react for 420 minutes under stirring conditions; Cool down, then coagulate the latex, and vacuum dry. After testing, the utilization rate of VTES can reach 88.0%. Compared with the unmodified raw rubber tensile strength (196.2kpa) and Mooney viscosity (56), the modified raw rubber tensile strength is 236.9kpa, an increase of 20.7%. , Mooney viscosity 61.2, only increased by 9.7%. SEM test shows that there are no large particles of silica in the modified compound.

Embodiment 3

[0043] Add 56g of dry glue SBR1500 latex and 12g of VTMS into a four-neck flask, stir and mix well, cool down to 8°C, then add 0.15g of dicumyl hydroperoxide and 0.015g of ferrous sulfate, and react under stirring for 400 Minutes; the latex is coagulated at the end of the reaction and dried in vacuum. After testing, the utilization rate of VTES can reach 92.0%. Compared with the unmodified raw rubber tensile strength (196.2kpa) and Mooney viscosity (56), the modified raw rubber tensile strength is 241.6kpa, an increase of 23.1%. , Mooney viscosity 64.4, increased by 15.5%. SEM test shows that there are no large particles of silica in the modified compound.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to view more

Abstract

A method of grafting and modifying rubber latex containing poly conjugated dialkene by in situ hybridization of silicon includes the following steps taking 100 parts by mass of rubber latex containing poly conjugated dialkene, adding from 4 to 25 parts of organic siloxane monomers with unsaturated bond into the rubber latex containing poly conjugated dialkene, stirring sufficiently to obtain uniform mixture, adding from 0.20 to 0.36 parts of initiators with stirring at the temperature of 5-85 DEG C for carrying out graft polymerization reaction for 5 to 8 hours, and agglomerating and drying the grafted and modified rubber latex. The structure formula of organo-sillicone monomers with unsaturated bond is Y-Si(R1R2R3), wherein Y- is unsaturated aliphatic chain segment with 2 to 18 carbons, R1- is alkoxy with 1 to 12 carbons, aryloxya with 6 to 12 carbons or silicide with 3 to 12 carbons, and R2 and R3 are the same groups as R1 or can also be saturated chain segment with 1 to 20 carbons or annular alkane or aromatic hydrocarbon with 1 to 8 carbons.

Description

technical field [0001] The invention relates to a modification method of latex, in particular to a method for modifying latex containing polyconjugated diene by silicon in-situ graft hybridization. Background technique [0002] The so-called in-situ hybridization means that in the dispersed phase (reinforcement or functional body) and the continuous phase (matrix) of the composite system, at least one phase does not exist before composite processing, but during composite processing, in the Formed under the condition that another phase already exists. The in-situ hybrid modification of rubber refers to the process of grafting copolymerization or cohydrolysis to disperse the dispersed phase silicon in the rubber matrix in the form of chemical bonds or nanometer size, so as to improve its tearing performance, reduce heat generation and improve the performance of composite products. Adhesion of the compound to other components. Since silicon-modified rubber exhibits good low r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08F279/02C08F253/00
Inventor 龚光碧张秋禹尹常杰赵志超郑聚成尹德忠梁滔艾纯金马朋高邵卫魏绪玲王振华
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap