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

Silane-terminated polyether sealing gum and preparation method thereof

A technology of silane-capped polyether and capped polyether, which is applied in the field of sealants, can solve problems such as poor heat resistance, low strength, and unstable structure, and achieve the effects of improving mechanical properties, excellent product performance, and reducing production costs

Inactive Publication Date: 2020-03-06
SHANGHAI INST OF TECH +1
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention are: in the prior art, organic silicon sealants and polyurethane sealants have technical problems such as low strength, unstable structure, poor heat resistance, etc.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of short-chain silane-terminated polyether polyols: (1) Allyl alcohol polyoxyethylene ether and toluene diisocyanate with a number-average molecular weight of 500 g / mol were added to the reaction flask at a molar ratio of 2:1, and heated to 60 ℃, and reacted for 3 hours under the protection of nitrogen to form a carbon-carbon double bond-terminated prepolymer W1: add the carbon-carbon double-bond-terminated prepolymer W1 and hydrogen-containing trimethoxysilane in a molar ratio of 1:1 to Add 60ppm chloroplatinic acid catalyst into the reaction bottle, heat to 90°C, and react for 6h under the protection of nitrogen to prepare short-chain silane-terminated polyether polyol.

[0028] Preparation of long-chain silane-terminated polyether polyols: (1) Allyl alcohol polyoxypropylene ether and toluene diisocyanate with a number-average molecular weight of 6000 g / mol were added to the reaction flask at a molar ratio of 2:1, and heated to 90 ℃, and reacted for 2 hour...

Embodiment 2

[0031] Preparation of short-chain silane-terminated polyether polyols: (1) Allyl alcohol polyoxypropylene ether and isophorone diisocyanate with a number average molecular weight of 1000 g / mol were added to the reaction flask at a molar ratio of 2:1, Heat to 90°C and react for 2 hours under the protection of nitrogen to form a carbon-carbon double bond-terminated prepolymer W1: the carbon-carbon double-bond-terminated prepolymer W1 and hydrogen-containing trimethoxysilane are in a molar ratio of 1: 2 into a reaction flask, and 30 ppm chloroplatinic acid catalyst was added, heated to 120° C., and reacted for 3 hours under the protection of nitrogen, and reacted to prepare a short-chain silane-terminated polyether polyol.

[0032] Preparation of long-chain silane-terminated polyether polyols: (1) Allyl alcohol polyoxyethylene ether with a number average molecular weight of 4000 g / mol and isophorone diisocyanate were added to the reaction flask at a molar ratio of 2:1, Heat to 90...

Embodiment 3

[0035] Preparation of short-chain silane-terminated polyether polyols: (1) Allyl alcohol polyoxypropylene ether with a number average molecular weight of 750 g / mol and diphenylmethane diisocyanate were added to the reaction flask at a molar ratio of 1.5:1, Heat to 75°C and react for 2.5 hours under the protection of nitrogen to form a carbon-carbon double bond-terminated prepolymer W1: the carbon-carbon double-bond-terminated prepolymer W1 and hydrogen-containing trimethoxysilane are in a molar ratio of 1 : 1.5 was added to the reaction bottle, and 45ppm chloroplatinic acid catalyst was added, heated to 105°C, and reacted for 4.5h under the protection of nitrogen to prepare short-chain silane-terminated polyether polyol.

[0036] Preparation of long-chain silane-terminated polyether polyol: (1) Prenol polyoxyethylene ether with a number average molecular weight of 5000 g / mol and diphenylmethane diisocyanate are added to the reaction flask at a molar ratio of 1.5:1 , heated to ...

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 discloses a silane-terminated polyether sealing gum and a preparation method thereof. The silane-terminated polyether sealing gum comprises a short-chain silane-terminated polyether polyhydric alcohol, a long-chain silane-terminated polyether polyhydric alcohol, a plasticizer, calcium carbonate, fumed white carbon black, an organic antifoaming agent, a silane coupling agent and an organic tin catalyst. The preparation method of the silane-terminated polyether sealing gum includes the steps: the short-chain silane-terminated polyether polyhydric alcohol, the long-chain silane-terminated polyether polyhydric alcohol, the plasticizer, calcium carbonate and the fumed white carbon black are added into a planetary stirrer and then stirred to be mixed uniformly; then, the silane coupling agent and the organic antifoaming agent are added, vacuumizing is conducted, and a mixture is stirred to be mixed uniformly; and after a vacuum environment is removed, the organic tin catalyst is added, vacuumizing is conducted again, a mixture is stirred and mixed uniformly, and the silane-terminated polyether sealing gum is obtained. The prepared silane-terminated polyether sealing gum hashigh tensile strength and breaking elongation, good weather resistance and durability, and high deformation-resistant and displacement-resistant capabilities.

Description

technical field [0001] The invention relates to a preparation method of a silane-terminated polyether sealant, which belongs to the technical field of sealants. Background technique [0002] Both silicone sealant and polyurethane sealant are widely used, but they all have some disadvantages, such as silicone sealant is easy to pollute the adjacent parts of the bonding area, and the surface finish is poor; polyurethane sealant has a pungent smell and is easy to produce air bubbles. Silane-terminated polyether sealant is a new type of silane-modified polyether sealant prepared from silane-terminated polyether (MS polymer) as the base polymer. The structural feature of MS polymer is that the main chain is a macromolecular polyether, and the end group is a silyl group containing a hydrolyzable group. The crosslinking point of the network structure of the MS sealant based on it is Si-O-Si bond after curing. , Between the cross-linking point and the cross-linking point is a long ...

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): C09J171/02C09J11/04C09J11/06C09J11/08C08G65/328C08G65/325
CPCC08G65/325C08G65/328C08K2003/265C08L2205/025C08L2205/03C08L2205/035C09J11/04C09J11/06C09J11/08C09J171/02C08L71/02C08K13/04C08K3/26C08K7/26C08K5/12
Inventor 高群雷曼云翟淑宁汤明长张伦生
Owner SHANGHAI INST OF TECH
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