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Phosphorus-containing polyether plasticizer and flame-retardant single-component silane modified sealant, and preparation methods and application thereof

A technology of silane modification and silane modified resin, which is applied in the field of sealants, can solve the problems of poor compatibility between plasticizers and silane modified resins, achieve reduced smoke density and smoke toxicity, low production cost, The effect of simple preparation method

Active Publication Date: 2019-11-29
GUANGDONG PUSTAR SEALED RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects and deficiencies of poor compatibility between the plasticizer and the silane-modified resin in the existing silane-modified polyether sealant, and provide a kind of phosphorus-containing polyether plasticizer

Method used

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  • Phosphorus-containing polyether plasticizer and flame-retardant single-component silane modified sealant, and preparation methods and application thereof
  • Phosphorus-containing polyether plasticizer and flame-retardant single-component silane modified sealant, and preparation methods and application thereof
  • Phosphorus-containing polyether plasticizer and flame-retardant single-component silane modified sealant, and preparation methods and application thereof

Examples

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Effect test

Embodiment 1～5

[0072] This example provides a series of phosphorus-containing polyether plasticizers, the formula and preparation method of which are as follows.

[0073] Table 1 Phosphorus-containing polyether plasticizer formula

[0074]

[0075] The preparation method is as follows:

[0076] (1) Slowly add the small molecule alcohol dropwise into the reaction vessel containing the phosphorus-containing compound under ice-salt bath conditions and stir for 3 hours, then gradually heat up to 80° C. for 3.5 to 4 hours under the protection of nitrogen (specifically, the formula in Example 1 The reaction time is 3.5h, and the reaction time of the remaining examples is 4h), the temperature is raised to 125°C for evacuation and aging for 2.5h, and the initiator is obtained when the water content is less than or equal to 200ppm;

[0077] (2) Under the protection of nitrogen, add an alkali metal catalyst into the initiator, and add propylene oxide and ethylene oxide in turn, and react at a temp...

Embodiment 6～16

[0082] This example provides a series of flame-retardant one-component silane-modified sealants, the formulations of which are shown in Table 2.

[0083] Table 2 Formula (mass fraction) of flame-retardant one-component silane-modified sealant

[0084]

[0085]

[0086] Each flame-retardant one-component silane-modified sealant is prepared through the following process:

[0087] (1) Disperse the silane-modified resin, phosphorus-containing polyether plasticizer, flame-retardant filler, flame-retardant smoke suppressant, thixotropic agent, ultraviolet light absorber and light stabilizer in the planetary reactor for 15 minutes, Then vacuumize and dehydrate at 95°C for 120 minutes, and then lower the temperature to below 50°C in a vacuum state to obtain a homogeneous paste mixture with a moisture content of ≤1000ppm;

[0088] (2) To the reaction kettle in (1), add the formula amount of water remover, coupling agent and catalyst in sequence, and stir for 30 minutes under the...

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Abstract

The invention relates to a phosphorus-containing polyether plasticizer and a flame-retardant single-component silane modified sealant, and preparation methods and application thereof. The phosphorus-containing polyether plasticizer is composed of the following components in percentage by mass: 1 to 10% of small molecular alcohol, 18 to 34% of a phosphorus-containing compound, 0.1 to 0.3% of an alkali metal catalyst, 10 to 20% of ethylene oxide, and 37.9 to 50% of propylene oxide. The phosphorus-containing polyether plasticizer provided by the invention has chain segments similar to the main chain structures of a silane modified sealant, and has good compatibility with silane modified resin; meanwhile, the phosphorus-containing polyether plasticizer can be cooperatively used with a flame-retardant filler and a flame-retardant smoke suppressor for synergistic flame retardance, so a flame retardance grade is improved, and smoke density and smoke toxicity are reduced. The sealant preparedfrom the phosphorus-containing polyether plasticizer, silane modified resin and the like has the advantages of lower smoke density, low smoke toxicity, low VOC content, excellent mechanical propertiesand bonding properties, and a flame retardant grade of 94V-0 grade, and meet the use requirements on sealants for rail transit.

Description

technical field [0001] The invention relates to the technical field of sealants, more specifically, to a phosphorus-containing polyether plasticizer, a flame-retardant one-component silane-modified sealant, a preparation method and application thereof. [0002] technical background [0003] Silane-modified sealants have the characteristics of good adhesion, no foaming when cured, and environmental protection, and are widely used in construction, automobiles, rail transit and other industrial fields. If a fire accident occurs during high-speed operation of rail vehicles, it is especially likely to cause heavy casualties. Therefore, the interior materials must meet the requirements for flame retardancy and fire prevention. The current fire protection requirements for rail vehicles in my country adopt EN 45545-2:2013+ formulated by the European Union A1: 2015 "Railway Application-Railway Vehicle Fire Protection Part 2: Fire Protection Performance Requirements for Materials and Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C09J171/00C09J175/04C09J171/02C09J11/04C09J11/06C09J11/08
CPCC08G65/2639C09J171/00C09J175/04C09J171/02C09J11/04C09J11/06C09J11/08C08L2201/02C08K2201/011C08K2003/2224C08K2003/2227C08L2205/025C08L2205/03C08L71/02C08K13/06C08K3/22C08L71/00C08L75/04
Inventor 潘生辉詹锋李忠光李忠经李桂妃
Owner GUANGDONG PUSTAR SEALED RAYON CO LTD
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