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Polymer having reactive silicon-containing group and production method therefor

A polymer and reactive technology, applied in the compound of group 4/14 elements of the periodic table, chemical instruments and methods, ester copolymer adhesives, etc., can solve the problem of increasing the crosslinking density of cured products and reducing crosslinking Density, low reactivity of dimethyl monomethoxysilyl group, etc., to achieve good reactivity

Active Publication Date: 2020-11-24
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the room-temperature-curable compositions disclosed in Patent Documents 1 and 2 have a problem in that the moisture-curing of the methyldimethoxysilyl group or the trimethoxysilyl group progresses the cross-linking reaction, and thus moisture-curing The cross-linking density of the final cured product increases, which is prone to cracking and peeling
[0009] On the other hand, when a compound having a dimethylmonomethoxysilyl group is used in combination in order to reduce the crosslink density, since the reactivity of the dimethylmonomethoxysilyl group is very low, there is a possibility that Issues such as poor curing

Method used

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  • Polymer having reactive silicon-containing group and production method therefor
  • Polymer having reactive silicon-containing group and production method therefor
  • Polymer having reactive silicon-containing group and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0182] [Example 1-1] Synthesis of polymer 1

[0183] In 200mL separable flask equipped with a stirrer, a reflux condenser and a thermometer was charged represented by the following average structural formula (II), a number average molecular weight of 10,450, polymerization degree m = polyacrylate compound having a leaving group of 40 100g (terminal functional group equivalent leaving group (Br) of 0.019 moles) and methacryloyloxy methyl methoxysilane 3.6 g of dimethyl (methacryloyl functional group amount of 0.019 mol), heated to 80 deg.] C . Wherein the input azobis-2-methylbutyronitrile 0.1g, stirred for 6 hours at 80 ℃. pass through 1 H-NMR measurement confirmed that a peak derived from the methacryloyl group of the starting material completely disappeared, the reaction was completed.

[0184] Reaction product obtained number average molecular weight of 10900, In addition, each molecule of the polymer introduces single alkoxysilyl base is 2.1.

[0185] [化 13]

[0186]

Embodiment 1-2

[0187] [Example 1-2] Synthesis of polymer 2

[0188] In 200mL separable flask equipped with a stirrer, a reflux condenser and a thermometer was charged represented by the following average structural formula (III), the number average molecular weight of 10,400, polymerization degree m = polyacrylate compound having a leaving group of 40 100g (terminal functional group equivalent leaving group (Br) of 0.019 moles) and methacryloyloxy methyl methoxysilane 3.6 g of dimethyl (methacryloyl functional group amount of 0.019 mol), heated to 80 deg.] C . Wherein the input azobis-2-methylbutyronitrile 0.1g, stirred for 6 hours at 80 ℃. pass through 1 H-NMR measurement confirmed that a peak derived from the methacryloyl group of the starting material completely disappeared, the reaction was completed.

[0189] Reaction product obtained number average molecular weight of 10800, In addition, each molecule of the polymer introduces single alkoxysilyl base is 2.2.

[0190] [Chemical 14]

[0191] ...

Embodiment 1-3

[0192] [Example 1-3] Synthesis of polymer 3

[0193] In 200mL separable flask equipped with a stirrer, a reflux condenser and a thermometer was charged represented by the above average structural formula (II), a number average molecular weight of 15,600, polymerization degree m = 60 having a leaving group polyacrylate compounds of 100g (terminal functional group equivalent leaving group (Br) of 0.013 moles) and methacryloyloxy methyl methoxysilane 2.4 g of dimethyl (amount of functional groups methacryloyl group 0.013 mol), heated to 80 ℃. Wherein the input azobis-2-methylbutyronitrile 0.1g, stirred for 6 hours at 80 ℃. pass through 1 H-NMR measurement confirmed that a peak derived from the methacryloyl group of the starting material completely disappeared, the reaction was completed.

[0194] Reaction product obtained number average molecular weight of 16100, In addition, each molecule of the polymer introduces single alkoxysilyl base is 2.0.

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Abstract

A polymer having a reactive silicon-containing group is represented by structural formula (1), and has good reactivity while having a monoalkoxysilyl group. (In the formula, X represents a monovalentto trivalent organic group including a main chain backbone including a predetermined polymer such as a polyurethane, a poly(meth)acrylate, or a polysiloxane, R1 and R2 each independently represent analkyl group or the like having 1-10 carbon atoms, Y represents O, S, or the like, A1 and A2 each represent a single bond, or a divalent linking group such as a divalent hydrocarbon group having 1-20 carbon atoms, and n represents a number of 1-3.)

Description

Technical field [0001] The present invention relates to a polymer having a reactive silicon-containing group and a method of producing a method, and more detail, involving a monoalkoxy having a silicon atom-bonded monoalkoxy in a molecular chain as a high molecular weight by forming a silicone bond. The polymer of the silicon group (hereinafter also referred to as "reactive silicon group".) And a method of producing thereof. Background technique [0002] Reactive silicon groups, especially the alkoxysilyl group having properties of hydrolysis in the presence of moisture, and thus, the polymer having the reactive silicon group can be used as a curing in the presence of moisture or moisture. combination. [0003] In these polymers, the polymers of the backbone of the polyaloxide-based polymers are generally known as modified silicones, and the main chain is a silicon-containing compound, which is generally known as the end-changing silicone. [0004] The curable composition used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/42C09D183/04C09D183/07C09J183/04C09J183/07
CPCC08F8/42C09D133/08C09D143/04C09J143/04C07F7/1804C07F7/1892C08F220/1804C08F8/26C08F220/18C08L33/06C08K5/17C09D133/06C09J133/06C08L83/04C09D183/04C09J183/04
Inventor 山田哲郎广神宗直
Owner SHIN ETSU CHEM IND CO LTD