Pre-foamed organic silicone foam material as well as preparation method and application thereof

A foaming material and silicone technology, which is applied in the field of pre-foaming silicone foaming material and its preparation, can solve the problems of low foaming ratio, affecting processing performance, and small gas generation, so as to increase the foaming ratio and improve Processability and the effect of increasing the amount of gas generation

Inactive Publication Date: 2019-09-17
ZHEJIANG XINAN CHEM INDAL GROUP
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydroxy silicone oil and the hydroxyl groups on the surface of the filler will form hydrogen bonds, resulting in severe thixotropy and affecting processing performance; and this method has a small amount of gas generation and a low foaming ratio; it is difficult to balance the foaming and vulcanization rate, and the process is difficult to control

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
  • Pre-foamed organic silicone foam material as well as preparation method and application thereof
  • Pre-foamed organic silicone foam material as well as preparation method and application thereof
  • Pre-foamed organic silicone foam material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0069] In another aspect, the present invention also provides a preparation method of the pre-foamed silicone foam material, which mainly includes: mixing the raw materials, heating, continuing to mix and pre-foaming, then extruding and curing to obtain the pre-foaming Foam silicone foam material;

[0070] Preferably, the heating is heating to 20-120°C (for example, but not limited to 30, 40, 50, 60, 70, 80, 90, 100, 110°C, etc.);

[0071] Preferably, the continued mixing is carried out in a high-speed disperser, and the heated mixture is subjected to high-speed shear mixing;

[0072] Preferably, continuing to mix includes: shear mixing at a rotation speed of 500-50000 r / min (for example, but not limited to 1000, 3000, 5000, 10000, 30000 r / min, etc.);

[0073] More preferably, continuing to mix includes: performing shear mixing at a rotation speed of 1000-10000 r / min;

[0074] Preferably, the time to continue mixing is 0.1-30 min, for example, but not limited to 0.5, 1, 3, 5, 10, 15, 2...

Embodiment 1

[0081] Weigh separately: 100 parts of vinyl-terminated organopolysiloxane (mole content of methylvinylsiloxane unit is 0.4%, viscosity is 10000mPa·s (25°C)), 12 parts of hydrophobic silica for reinforcement, 15 parts of hydrogen-containing polysiloxane (viscosity of 20mPa·s (25°C), hydrogen content of 0.8%), 25 parts of hydroxy silicone oil (viscosity of 10000mPa·s (25°C), hydroxyl chain link molar content of 0.4% ), 2 parts of microsphere blowing agent, 5 parts of petroleum ether, 5 parts of polyether glycol, 0.1 part of fluorocarbon surfactant, 30 parts of aluminum hydroxide, 10 parts of zinc borate, 0.5 parts of ethynyl cyclohexanol, card Ster catalyst 5ppm.

[0082] After mixing the above components uniformly, preheat to 60°C, and pre-foam in a high-speed disperser at a speed of 4000r / min for high-speed shearing and mixing for 1min. Extrusion, coating, and curing at 120°C to form a sheet to obtain a foamed silicone rubber material with a tensile strength of 300KPa, a density...

Embodiment 2

[0084] Weigh separately: 50 parts of vinyl-terminated organopolysiloxane (mole content of methylvinylsiloxane unit is 0.4%, viscosity is 10000mPa·s (25°C)), 12 parts of hydrophobic silica for reinforcement, 30 parts of hydrogen-containing polysiloxane (viscosity of 20mPa·s (25°C), hydrogen content of 1.0%), 30 parts of hydroxy silicone oil (viscosity of 50mPa·s (25°C), hydroxyl chain link molar content of 10% ), 2 parts of propylene glycol butyl ether, 1 part of benzoyl peroxide, 1 part of isopropanol mixture, 0.1 part of sorbitol fatty acid ester surfactant, 40 parts of magnesium hydroxide, zinc borate mixture, 0.5 part of methylpentyne Mixture of alcohol, hexamethylene diisocyanate, toluene isocyanate, vinyl siloxane, 30 ppm of platinum chlorate.

[0085] After mixing the above components uniformly, preheat to 60°C, and pre-foam in a high-speed disperser, and mix with high-speed shear at 10000r / min for 1min. Extrusion, coating, and curing at 120°C to form a sheet to obtain a f...

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
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to view more

Abstract

The invention provides a pre-foamed organic silicone foam material as well as a preparation method and application thereof. The pre-foamed organic silicone foam material disclosed by the invention comprises the following raw materials: methyl and/or vinyl-terminated organopolysiloxane, hydrogen-containing polysiloxane, hydroxyl silicone oil, a pre-foaming agent, an alcohol substance, a surfactant, a filler, a catalyst and a vulcanization inhibitor. According to the pre-foamed organic silicone foam material disclosed by the invention, the pre-foaming agent and the alcohol substance are adopted for performing auxiliary foaming on the basis of dehydrogenation foaming of hydroxyl silicone oil, foaming can be performed before a dehydrogenation reaction, tiny bubble nucleuses are formed, gas volumes and foaming ratios can be effectively increased, the dosage of the hydroxyl silicone oil is reduced, thixotropy is reduced, and processability is improved. Meanwhile, by adding aids such as the surfactant, compatibility of the components can be improved, and stability in the foaming process is improved, so that the prepared foam material is fine and uniform in pore and low in density.

Description

Technical field [0001] The invention relates to the field of organic silicon foaming materials, and in particular to a pre-foamed organic silicon foaming material and a preparation method and application thereof. Background technique [0002] The organic silicon foam material is a porous silicon material with excellent weather resistance, which is mainly prepared by physical foaming or chemical foaming. Physical foaming is generally achieved by adding inorganic pore formers, expandable microspheres, etc. during the preparation process. However, the former requires the removal of pore formers after vulcanization and molding, and the process flow is complicated and inefficient; the latter has poor flame retardancy. Poor high temperature resistance. Chemical foaming generally adds azodicarbonamide, sodium bicarbonate, azobisisobutyronitrile and other chemical foaming agents that are easy to decompose and produce gas at high temperatures, but the high temperature decomposition of ch...

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): C08L83/07C08L83/05C08L83/04C08K3/36C08K3/22C08K3/38C08J9/02C08J9/32C08J9/14
CPCC08J9/0061C08J9/0066C08J9/02C08J9/141C08J9/32C08J2203/14C08J2383/07C08J2483/04C08J2483/05C08K3/36C08K2003/2227C08K2003/387
Inventor 郭昱见陈丽云李露卢杭金培玉邱昌福徐旋
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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