Silanol-group-terminated polyoxyalkylene compound and production process therefor, room-temperature-curable composition, sealing material, and article

A technology of polyoxyalkylene and manufacturing method, which is applied in the direction of chemical instruments and methods, polyether adhesives, adhesive types, etc., and can solve problems such as insufficient curing and development limitations

Pending Publication Date: 2018-12-21
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for condensation curable compositions using oxime, amide, aminooxy, and acetic acid types as curing agents other than alkoxy types, for example, curing may not be sufficient, and a combination of various characteristics is effectively utilized. There are limitations in the development of substances and need to be improved

Method used

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  • Silanol-group-terminated polyoxyalkylene compound and production process therefor, room-temperature-curable composition, sealing material, and article
  • Silanol-group-terminated polyoxyalkylene compound and production process therefor, room-temperature-curable composition, sealing material, and article
  • Silanol-group-terminated polyoxyalkylene compound and production process therefor, room-temperature-curable composition, sealing material, and article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0218] In a 500 mL four-neck detachable flask equipped with a stirrer, a reflux condenser, a thermometer, and a dropping funnel, 500 g of polypropylene glycol containing a terminal allyl group having a molecular weight of 7400 (0.160 moles in terms of the functional group of the terminal allyl group) ), a platinum catalyst (vinylsiloxane complex solution of chloroplatinic acid, platinum concentration: 1% by mass) 1.0 g, and the temperature was raised to 90° C. while heating and stirring.

[0219] Next, with stirring, 1-hydroxy-octamethyltetrasiloxane (i.e., 1-hydroxy-7-hydrogen-1,1,3,3,5,5,7,7-octamethyl Tetrasiloxane) 50 g (0.167 mol of terminal Si—H functional groups), heat generation was confirmed, the reaction temperature was 90 to 95° C., and the reaction system was maintained for 6 hours. After the reaction, a small amount of excess 1-hydroxy-octamethyltetrasiloxane was removed under reduced pressure. After cooling to room temperature, it was filtered to obtain 520 g of...

Embodiment 2

[0224] In a 500-mL four-necked detachable flask equipped with a stirrer, a reflux condenser, a thermometer, and a dropping funnel, 500 g of polypropylene glycol containing terminal allyl groups having a molecular weight of 8400 (0.112 moles in terms of functional groups of terminal allyl groups) ), a platinum catalyst (vinylsiloxane complex solution of chloroplatinic acid, platinum concentration: 1% by mass) 1.0 g, and the temperature was raised to 90° C. while heating and stirring.

[0225] Next, under stirring, 35 g of 1-hydroxy-octamethyltetrasiloxane (0.117 moles of terminal Si-H functional groups) was added dropwise, heat generation was confirmed, and the reaction temperature became 90 to 95° C., and the reaction system was kept 6 hours. After the reaction, a small amount of excess 1-hydroxy-octamethyltetrasiloxane was removed under reduced pressure. After cooling to room temperature, it was filtered to obtain 505 g of polypropylene glycol (polymer B) having a terminal s...

Embodiment 3

[0227] In a 500 mL four-neck detachable flask equipped with a stirrer, a reflux condenser, a thermometer, and a dropping funnel, 250 g of polypropylene glycol containing a terminal allyl group having a molecular weight of 4300 (0.107 moles in terms of a terminal allyl group) ), a platinum catalyst (vinylsiloxane complex solution of chloroplatinic acid, platinum concentration: 1% by mass) 1.0 g, and the temperature was raised to 90° C. while heating and stirring.

[0228] Next, under stirring, 33 g of 1-hydroxy-octamethyltetrasiloxane (0.110 mol of terminal Si-H functional groups) was added dropwise, heat generation was confirmed, and the reaction temperature became 90 to 95° C., and the reaction system was kept 6 hours. After the reaction, a small amount of excess 1-hydroxy-octamethyltetrasiloxane was removed under reduced pressure. After cooling to room temperature, it was filtered to obtain 268 g of polypropylene glycol (polymer C) having a terminal silanol group (viscosity...

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Abstract

Provided is a novel polyoxyalkylene compound which contains, at a molecular chain terminal, at least one reactive silicon-containing group represented by formula (1) per molecule and which has a mainchain that is a polyoxyalkylene polymer. Also provided are: a process for producing the novel polyoxyalkylene compound; a room-temperature-curable composition which includes the compound as a main component and can contain any of various crosslinking agents; a sealing material; and an article. (In formula (1), R1 and R2 are each a monovalent hydrocarbon group, a hydrogen atom, or a triorganosiloxygroup; n is 2 or larger; m is 1 or larger; and the broken line is a linking bond.)

Description

technical field [0001] The present invention relates to a novel polyoxyalkylene-based compound, a method for producing the same, and a room-temperature-curable composition containing the polyoxyalkylene-based compound as a main ingredient (base polymer), and particularly to a polyoxyalkylene-based compound having a hydrolyzable silyl group in its molecule. A room-temperature-curable composition containing an organosilicon compound as a curing agent (crosslinking agent), a sealing material comprising the room-temperature-curable composition, and an article bonded and / or sealed with a cured product of the room-temperature-curable composition, the The novel polyoxyalkylene-based compound is characterized in that, as a silicon group that can be crosslinked by forming a siloxane bond (hereinafter also referred to as a "reactive silicon group"), it contains It has a reactive silicon group having a hydroxyl group (ie, a silanol group) bonded to a silicon atom, and its main chain is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/336C08G77/46C08L71/02C08L83/12C09K3/10
CPCC08G77/46C09K3/10C08L71/02C08L83/12C08G65/336C09K3/1018C09J171/02C09J183/12C08L83/04
Inventor 山口贵大池野正行岩崎功坂本隆文
Owner SHIN ETSU CHEM IND CO LTD
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