Polyurethane sealant and preparation method thereof

A polyurethane sealant, prepolymer technology, applied in the direction of polyurea/polyurethane adhesives, chemical instruments and methods, adhesives, etc., can solve the problem of low elongation, low body strength, affecting the application effect of one-component polyurethane sealants or ergonomics

Inactive Publication Date: 2009-11-18
北京森聚柯高分子材料有限公司 +1
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present inventor finds when realizing technical scheme of the present invention, the defect that existing polyurethane sealant especially exists when automobile glass is installed: when single-component polyurethane sealant is u

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
  • Polyurethane sealant and preparation method thereof
  • Polyurethane sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] In order to further illustrate the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation of the polyurethane sealant proposed according to the present invention will be described in detail below in conjunction with the preferred embodiments.

[0030] Synthesis of prepolymers

[0031] The prepolymer is 30-60% by weight of polyoxypropylene diol (molecular weight 1500-4000), 20-55% of polyoxypropylene trihydric alcohol (molecular weight 4800-6500), 0.5-5 % of hexanediol, 10-30% of 4,4'-diphenylmethane diisocyanate and 0.1-0.5% of dibutyltin dilaurate (as a catalyst), under the protection of nitrogen in the reactor, at 90 ℃ -100 It can be obtained by reacting at ℃ for 2-5 hours. The prepolymer is a difunctional terminal isocyanate with a molecular weight of at least 1500 or more, a trifunctional terminal isocyanate with a molecular weight of at least 4800 or a mixture thereof, or an intermediate p...

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 polyurethane sealant and a preparation method thereof. The polyurethane sealant comprises 30-70 weight percent of performed polymer, dinonyl phthalate, carbon soot, N,N-dimethyl benzylamine, byk-111, oxazolidine, epoxy silicone hydride and amino-group silicone hydride, wherein the performed polymer is obtained through the reaction of polyoxyalkylene dihydric alcohol, polyoxypropylene trihydric alcohol, hexamethylene glycol and 4,4'-diphenylmethane diisocyanate by taking dibutyl tin laurate as a catalyst. After being solidified, the polyurethane sealant has over 8MPa of tensile strength of elastomer and over 450 percent of elongation at break, not only has better solidifying speed at normal temperature, but also has very high solidifying speed at low temperature and low humidity. The polyurethane sealant is suitable for elastic splicing with high mechanical property, such as the elastic splicing during the installation of glass of automobiles, trains, ships, airplanes, cable cars, and the like and is suitable for the rapid splicing at low temperature and low humidity and other elastic splicing with high mechanical property.

Description

technical field [0001] The invention relates to a polyurethane sealant, in particular to a high-modulus polyurethane sealant for elastic bonding of glass, metal, ceramics, stone, wood, etc. and a preparation method thereof. Background technique [0002] Sealant is a material used to fill gaps (holes, joints, seams, etc.) and has a bonding effect on the interface of the filled base. It mainly includes: silicone (including modified silicone), polyurethane, polysulfide rubber , Acrylic esters, SBR rubber, butyl rubber, asphalt, oily caulk, etc. Elastic sealant must be used to fill gaps that are stretchable due to vibration or thermal expansion and contraction. Elastic sealant is a product that combines two functions of bonding and sealing. Among them, the three types of high-grade elastic sealants with better performance are silicone sealant, polysulfide sealant and polyurethane sealant. In recent years, elastic sealants have been used more and more widely in many industrial...

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): C09K3/10C09J175/04
Inventor 余建平
Owner 北京森聚柯高分子材料有限公司
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