Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of platinum catalyst for liquid silicone rubber

A liquid silicone rubber and platinum catalyst technology, which is applied in the field of catalysts for addition-type liquid silicone rubber, can solve problems such as poor stability of complexes, unsatisfactory performance and appearance, and easy volatilization and loss of alkyne compound ligands. Smoothness, high product yield, and excellent catalytic rate

Active Publication Date: 2017-09-22
江苏矽时代材料科技有限公司
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the boiling point of the acetylenic compound ligand used in the catalyst is not high, and the stability of the formed complex itself is not good, so that the acetylenic compound ligand is easily volatilized and lost during the high-temperature curing process, so the liquid silicone rubber using this catalyst The performance and appearance after vulcanization are not ideal

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
  • Preparation method of platinum catalyst for liquid silicone rubber
  • Preparation method of platinum catalyst for liquid silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0029] The preparation method of platinum catalyst C2 for addition type liquid silicone rubber comprises the following steps:

[0030] (1) Add 5ml of ethanol solution into a thickened pressure-resistant single-screw bottle, turn on magnetic stirring, and then add 5g of sodium bicarbonate;

[0031] (2) Introduce nitrogen for 0.5h to exhaust the air in the reactor;

[0032] (3) Add 0.6g of chloroplatinic acid, 6g of vinyltetramethyldisiloxane and 1.9g of bis-vinyldimethylsilyl maleate into the above reaction flask, and heat to 70°C to continue the reaction ;

[0033] (4) When the color of the reactant becomes slightly light yellow or basically colorless, stop the reaction;

[0034] (5) Filter out the solid matter, and wash the solid filter residue with the reactant alcohol several times;

[0035] (6) Collect the filtrates after multiple filtrations, and remove low molecules at low temperature and high vacuum to prepare platinum catalysts.

Embodiment 3

[0037] Mix vinyl resins, vinyl silicone oils and hydrogen-containing silicone oils of different qualities according to the optimal ratio, wherein the ratio of vinyl / hydrogen groups is between 0.9:1~1:0.9, and then add 2ppm to the above base rubber The amount of C1, mixed again to investigate the reactivity of the prepared addition-type liquid silicone rubber.

Embodiment 4

[0039] The same basic rubber as in Example 3 was used, and then 2 ppm of C2 was added, mixed evenly, and then the reactivity of the prepared addition-type liquid silicone rubber was investigated.

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

No PUM Login to View More

Abstract

The invention provides a preparation method of a platinum catalyst for liquid silicone rubber. The preparation method comprises the following steps: S1, adding sodium bicarbonate into an alcohol solvent to be dissolved; S2, under anaerobic condition, adding chloroplatinic acid, vinyl tetramethyl disiloxane and maleate compound into S1 to react; S3, after reaction of S2 is finished, filtering solid out, washing for many times, combining filtrate, and removing low molecules in the filtrate to obtain the platinum catalyst for the liquid silicone rubber. The prepared platinum catalyst for the liquid silicone rubber disclosed by the invention is applied to the liquid silicone rubber, can effectively adjust activity and speed of addition reaction between vinyl polysiloxane and hydrogen polysiloxane, has excellent catalytic rate, obviously improves operable time of addition type silicone rubber and normal-temperature storage time of the single-component addition type liquid silicone rubber, obviously improves flatness and smoothness of the surface of a cured part after curing and is suitable for single-component or double-component organic silicone adhesives. The preparation method disclosed by the invention has the advantages of simple operation technology, high product yield and suitability for being popularized and applied in industry.

Description

technical field [0001] The invention relates to the technical field of catalysts for addition-type liquid silicone rubber, and more specifically, to a preparation method of a platinum catalyst for liquid silicone rubber. Background technique [0002] Among the catalysts that initiate the addition reaction between Si-Vi (Vi is the abbreviation of vinyl Vinyl) and Si-H, the most widely used and most effective catalyst is the platinum catalyst. However, as a platinum catalyst for the hydrosilylation reaction, if the activity is too high, there will be a problem that the operable time of the two-component addition type liquid silicone rubber is too short after mixing and the one-component addition type liquid silicone rubber cannot be stored; and if the catalyst If the activity is too low, the addition reaction cannot be guaranteed to be complete. Therefore, the ideal catalyst should hardly react before reaching the vulcanization temperature, and once the reaction temperature i...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/44
CPCC08G77/44
Inventor 许静文康润华
Owner 江苏矽时代材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com