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Novel polysulfide rubber and preparation method thereof

A polysulfide rubber, a new type of technology, applied in the field of polysulfide rubber, can solve problems such as intolerance to storage, and achieve the effect of excellent performance

Inactive Publication Date: 2010-07-14
SICHUAN AILUN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this new polysulfide rubber molecule contains almost no active isocyanate groups, so it has successfully solved the problem of not being durable

Method used

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  • Novel polysulfide rubber and preparation method thereof
  • Novel polysulfide rubber and preparation method thereof
  • Novel polysulfide rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1. Novel polysulfide rubber has ten small examples

example 1

[0026] Example 1. New polysulfide rubber

[0027] The new polysulfide rubber of this example adopts special grafting technology to graft the terminal mercapto group to the end of the polyurethane macromolecular chain, and after capping, a new type of polysulfide rubber is made. The polysulfide rubber in this example is a macromolecule with the following structural formula Compound:

[0028]

[0029] In the structural formula: this example n is selected as: n=1, R 1 Selected from structural formula O=C=N-R 1 -N=C=O, where R 1 is a diisocyanate, the R 1 Choose any one, or any two, or any three of the diisocyanates: if you choose aromatic TDI a diisocyanate, or if you choose aliphatic HDI, TMHDI two diisocyanates, or if you choose alicyclic IPDI, HTDI, HMDI three kinds of diisocyanate etc. of family, but the diisocyanate formula and component weight ratio of this example are 80 parts by weight. R 2 Selected from structural formula HO-R 2 -OH, where R 2 is a polyol, the...

example 2

[0030] Example 2. New polysulfide rubber

[0031] The new polysulfide rubber of this example adopts special grafting technology to graft the terminal mercapto group to the end of the polyurethane macromolecular chain, and after capping, a new type of polysulfide rubber is made. The polysulfide rubber in this example is a macromolecule with the following structural formula Compound:

[0032]

[0033] In the structural formula: this example n is selected as: n=2, R 1 Selected from structural formula O=C=N-R 1 -N=C=O, where R 1 is a diisocyanate, the R 1 Choose any one, or any two, or any three of the diisocyanates: if you choose aliphatic LDI a diisocyanate, or if you choose alicyclic IPDI, HLDI two diisocyanates, or if you choose aromatic The TDI, MDI, PPDI three kinds of diisocyanate etc. of family, but the diisocyanate formula and component weight ratio of this example are 82 parts by weight. R 2 Selected from structural formula HO-R 2 -OH, where R 2 is a polyol, t...

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Abstract

The invention discloses a novel polysulfide rubber and a preparation method thereof, belonging to the technical field of polysulfide rubber; the novel polysulfide rubber adopts advanced and practical graft technology, in which terminated mercapto is grafted to polyurethane macromolecular chain terminal to prepare the novel polysulfide rubber; the novel polysulfide rubber integrates the advantages of polyurethane rubber and polysulfide rubber without having the defects of both, and is a polysulfide rubber with excellent performance, which has the following macromolecular compound structural formula: FORMULA, wherein n is selected from the group consisting of integers from 1 to 3, R1 is selected from any one or ones of the group consisting of vulcabonds, R2 is selected from any one or ones of the group consisting of polyoxypropulene ether polyol, polytetrahydrofuran polyol, copolyether polyol and polyolefine polyol, and R3 is selected from any one or ones of the group consisting of terminated mercapto-containing acid compounds; the preparation method of the novel polysulfide rubber comprises: the first step of polymerization reaction to form polyurethane prepolymer and the second step of esterification reaction and grafting the terminated mercapto-containing acids to the polyurethane prepolymer. The novel polysulfide rubber and the preparation method thereof are worth adoption and popularization.

Description

1. Technical field [0001] The novel polysulfide rubber disclosed by the invention and its preparation method belong to the technical field of polysulfide rubber, specifically relate to a novel polysulfide rubber, and also relate to a preparation method of the polysulfide rubber. 2. Background technology [0002] Waterproof treatment in the construction field is an important aspect of building construction. Waterproof treatment, such as widely used in construction, municipal, subway, tunnel and water conservancy projects, such as waterproof sealing of deformation joints such as concrete expansion and settlement. There are two commonly used materials for waterproofing: polyurethane rubber and polysulfide rubber, each of which has its own advantages and disadvantages. The advantages of polysulfide rubber are: high strength, good elasticity, and low water vapor transmission rate. Its disadvantages are: it is not resistant to aging, the elongation rate drops significantly under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/87
Inventor 钟友昭邓勇周艳明陈渊程新华朱福田
Owner SICHUAN AILUN TECH
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