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Silicon dioxide modified polyether polyol and preparation method thereof

A technology of polyether polyol and silicon dioxide, which is applied in the field of polyether polyol modification, can solve the problems of large molecular weight of silicone modified polyether, mechanical properties that cannot meet the requirements, and cannot provide sufficient strength, etc., to achieve a reinforced system The effect of cross-linking degree, improving the mechanical properties of products, and good flame retardant properties

Pending Publication Date: 2022-04-12
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN108409971A discloses a preparation method of organosilicon-modified polyether polyol, which uses organosilicon to prepare hydrogen-containing silicone oil, and then reacts allyl polyether with hydrogen-containing silicone oil to prepare organosilicon-modified polyether polyol , first of all, the technical route is relatively complicated, and secondly, the organosilicon-modified polyether prepared by the modified process has a large molecular weight and a low hydroxyl value. The downstream application process of polyurethane cannot provide sufficient strength, and the mechanical properties cannot meet the requirements.

Method used

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  • Silicon dioxide modified polyether polyol and preparation method thereof
  • Silicon dioxide modified polyether polyol and preparation method thereof
  • Silicon dioxide modified polyether polyol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 180g, 315g, and 6.5g of glycerin, sucrose, and KOH to the reaction kettle, first replace with nitrogen, then pressurize and test for 20 minutes, when the temperature rises to 90°C, the speed is 500rpm, vacuumize, and under negative pressure conditions PO 1 Feeding 900g, internal pressure reaction 2h.

[0031] First add 23g of water glass and then adjust the pH of the reaction system to 12, then dehydrate for 100min at 105°C, when the temperature rises to 135°C, PO 2 Feed 300g, react under internal pressure for 2h, after removing monomer for 30min, add 5.8g of 50% phosphoric acid for neutralization reaction for 1h when the temperature drops to 85°C, add 600NS and 700NS respectively after neutralization reaction for 2g and 1g adsorption for 30min , and obtained silica modified polyether after suction filtration, named as S 1 .

[0032] The appearance of the product prepared in Example 1 is light yellow transparent or brownish yellow transparent, OHV: 440mgKOH / g, VI...

Embodiment 2

[0034] Add 180g, 300g, and 6.5g of glycerin, sucrose, and KOH to the reaction kettle, first replace with nitrogen, and then pressurize and test for leaks for 20 minutes. PO 1 Feeding 900g, internal pressure reaction 2h.

[0035] First add 50g of water glass and then adjust the pH of the reaction system to 12, then dehydrate for 100min at 105°C, when the temperature rises to 135°C, PO 2 Feed 300g, react under internal pressure for 2h, remove monomer after 30min, add 5.8g of 70% phosphoric acid to neutralize for 1h when the temperature drops to 85°C, add 2g and 1g of 600NS and 700NS after neutralization to absorb for 30min , and obtained silica modified polyether after suction filtration, named as S 2 .

[0036] The appearance of the product prepared in Example 2 is light yellow transparent or brown yellow transparent, OHV: 443 mgKOH / g, VIS: 7300 mPa·s.

Embodiment 3

[0038] Add 210g, 420g and 6.5g of diethylene glycol, sorbitol and KOH to the reaction kettle respectively. First replace with nitrogen, then pressurize and test for leaks for 20 minutes. When the temperature rises to 90°C and the speed is 500rpm, vacuumize and PO under pressure 1 Feeding 900g, internal pressure reaction 2h.

[0039] First add 50g of water glass and then adjust the pH of the reaction system to 12, then dehydrate at 105°C for 100min, when the temperature rises to 135°C, PO 2 Feed 300g, react under internal pressure for 2h, after monomer removal for 30min, add 5.8g of 60% phosphoric acid to neutralize for 1h when the temperature drops to 85°C, add 600NS and 700NS respectively after neutralization for 30min , After suction filtration, the silica-modified polyether was obtained and named as S 3 .

[0040] The appearance of the product prepared in Example 3 is light yellow or transparent brown, OHV: 336 mgKOH / g, VIS: 5700 mPa·s.

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Abstract

The invention relates to silicon dioxide modified polyether polyol and a preparation method thereof, and belongs to the technical field of polyether polyol modification. The preparation method of the silicon dioxide modified polyether polyol comprises the following steps: (1) carrying out polymerization reaction on a composite initiator and an alkylene oxide compound PO1 under the action of a catalyst; (2) adding water glass, and adjusting the pH value; (3) heating for dehydration, and then adding an alkylene oxide compound PO2 for polymerization reaction; and (4) carrying out post-treatment to obtain the polyether polyol. A polyurethane material prepared from the silicon dioxide modified polyether polyol has a flame-retardant effect, and meanwhile, the problems of compatibility and stability of a conventional mixed system are solved; the invention also provides a simple and feasible preparation method.

Description

technical field [0001] The invention relates to a silica-modified polyether polyol and a preparation method thereof, belonging to the technical field of polyether polyol modification. Background technique [0002] The types of polyurethane include soft foam, hard foam, elastomer, elastic fiber, coating, adhesive, shoe leather resin, paving material, waterproof material, leather finishing agent, etc., and its application fields are extremely wide. However, polyurethane materials are flammable, and their limiting oxygen index (LOI) is about 16% to 18%, which limits their application in some special fields and may pose a threat to people's lives and property safety. Some developed countries have already promulgated flame retardant standards for interior textiles and building materials. The flame retardants used in polyurethane are additive and reactive. The former does not participate in the reaction, but the liquid flame retardants may migrate to the surface during the long-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/50C08G101/00
Inventor 程铸洪杨芹芹姜男邵家政
Owner SHANDONG INOV NEW MATERIALS CO LTD