Linear organic fluorine-containing polysiloxane as well as preparation method and application thereof

A polysiloxane and organic technology, which is applied in the field of linear organic fluorine-containing polysiloxane and its preparation, can solve the problems of high cost and viscosity control of fluorine-containing polysiloxane, and achieves less by-products and convenient post-processing. , the effect of high product quality

Active Publication Date: 2021-04-13
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a linear organic fluorine-containing polysiloxane, which solves the problems of viscosity control and high cost of fluorine-containing polysiloxane; the present invention also provides its preparation method and application, the preparation method is simple, and there are few by-products , convenient post-processing, high-quality products, suitable for coatings, release agents, pressure-sensitive adhesives, lubricants, defoamers

Method used

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  • Linear organic fluorine-containing polysiloxane as well as preparation method and application thereof
  • Linear organic fluorine-containing polysiloxane as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0032] 100 parts by weight of fluorine-containing monomer C 3 f 7 C(CF 3 ) 2 CH 2 CH 2 Si(Cl) 2 CH 3 After hydrolysis treatment, with 4.86 parts by weight of hexamethylhexavinyl cyclohexasiloxane 110.51 parts by weight of hexamethylcyclotrisiloxane 0.213 parts by weight of silane end-capping agent After mixing, add it to the reaction kettle, protect it with nitrogen, raise the temperature to 80°C, add trifluoromethanesulfonic acid with a mass fraction of 0.3% fluorine-containing monomer, and catalyze the reaction for 10 hours, then lower the temperature, neutralize, filter, and remove low boilers to obtain Fluorine-containing polysiloxane with a fluorine content of 33 wt%, a vinyl content of 1.2 wt%, and a viscosity of 330 mPa·s has a yield of 89.1%.

Embodiment 2

[0034] 100 parts by weight of fluorine-containing monomer C 3 f 7 C(CF 3 ) 2 CH 2 CH 2 CH 2 CH 2 Si(Cl) 2 CH 3 After hydrolysis treatment, with 18.4 parts by weight of trimethylcyclotrisiloxane 83.4 parts by weight of hexamethylcyclotrisiloxane 0.201 parts by weight of silane end-capping agent After mixing, add it to the reaction kettle, protect it with nitrogen, raise the temperature to 80°C, add trifluoromethanesulfonic acid with a mass fraction of 0.3% fluorine-containing monomer, and catalyze the reaction for 10 hours, then lower the temperature, neutralize, filter, and remove low boilers to obtain Fluorine-containing polysiloxane with a fluorine content of 32.4 wt%, a hydrogen content of 16.3 wt%, and a viscosity of 280 mPa·s has a yield of 90.3%.

Embodiment 3

[0036] 100 parts of fluorine-containing monomer C 3 f 7 C(CF 3 ) 2 OCOCH 2 CH 2 Si(Cl) 2 CH 3 After hydrolysis treatment, with 2.56 parts by weight of hexamethylhexavinyl cyclohexasiloxane 52.31 parts by weight of hexamethylcyclotrisiloxane 0.146 parts by weight of silane end-capping agent After mixing, add it to the reaction kettle, protect it with nitrogen, raise the temperature to 80°C, add trifluoromethanesulfonic acid with a mass fraction of 0.3% fluorine-containing monomer, and after catalyzing the reaction for 10 hours, lower the temperature, neutralize, filter, and remove low boilers to obtain Fluorine-containing polysiloxane with a fluorine content of 42.5 wt%, a vinyl content of 2.1 wt%, and a viscosity of 480 mPa·s has a yield of 92.1%.

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Abstract

The invention relates to the technical field of fluorine-containing polymers, in particular to linear organic fluorine-containing polysiloxane as well as a preparation method and application thereof. The preparation method of the linear organic polysiloxane comprises the following steps: hydrolyzing a fluorine-containing monomer, mixing the hydrolyzed fluorine-containing monomer with vinyl siloxane or hydrogen-containing siloxane, alkyl siloxane and an end-capping reagent, adding a catalyst, and carrying out reaction for 2-8 h at a temperature of 50-130 DEG C for copolymerization so as to obtain the linear organic polysiloxane. According to the linear organic fluorine-containing polysiloxane, the problems of viscosity control and high cost of fluorine-containing polysiloxane are solved, the preparation method is simple, few by-products are produced, aftertreatment is convenient, and the obtained product is high in quality and suitable for the fields of coatings, release agents, pressure-sensitive adhesives, lubricants and defoaming agents.

Description

technical field [0001] The invention relates to the technical field of fluorine-containing polymers, in particular to a linear organic fluorine-containing polysiloxane and its preparation method and application. Background technique [0002] Among the elements existing on the earth's surface, oxygen accounts for the most, as high as 49.5%. In the second place is silicon, with a content of 25.8%. The -Si-O-Si-O-skeleton formed by the two is widely distributed in nature, and organosilicon compounds refer to compounds in which silicon atoms are connected to carbon atoms containing organic groups. Known as "industrial monosodium glutamate" and "catalyst for scientific and technological development", organosilicon is a synthetic polymer with silicon-oxygen atoms as the main chain in its structure. Among the chemical bonds formed between silicon and other elements, except Si- In addition to the F (560.6KJ / mol) bond, the Si-O (422.5KJ / mol) bond is the strongest, which is also the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/24C08G77/06C08G77/20C08G77/12C08G77/44C09D183/10C09J183/10C10M155/02B01D19/04
CPCC08G77/24C08G77/06C08G77/20C08G77/12C08G77/44C09D183/10C09J183/10C10M155/02B01D19/0409C10M2229/051
Inventor 冯威唐亮亮杜冲冲史大阔张永明
Owner SHANDONG DONGYUE POLYMER MATERIAL
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