Preparation method of organosilicon surfactant used for preparing polyurethane rigid foam

A surfactant and rigid foam technology, applied in the chemical industry, can solve problems such as milky white, opaque, and poor compatibility of polyurethane composite materials, and achieve the effect of improving the skin and transparent appearance

Inactive Publication Date: 2019-09-27
SHANGHAI MAIPU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation method that is used to prepare the organosilicon surfactant of polyurethane rigid foam, described this preparation method that is used to prepare the organosilicon surfactant of polyurethane rigid foam will solve existing The silicone surfactant in the technology will appear milky white and opaque when mixed with water and amine catalysts, and will deteriorate immediately after mixing. At the same time, the technical problem of poor compatibility with polyurethane composite materials must be solved

Method used

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  • Preparation method of organosilicon surfactant used for preparing polyurethane rigid foam
  • Preparation method of organosilicon surfactant used for preparing polyurethane rigid foam
  • Preparation method of organosilicon surfactant used for preparing polyurethane rigid foam

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Embodiment 1

[0018] The preparation of embodiment 1 organosilicon copolymer surfactant

[0019] In a 500ml four-neck flask with a fixture, constant temperature function, mechanical stirring, thermocouple and nitrogen, add 350g of allyl chloride-terminated allyl polyoxyethylene with an average molecular weight of 2100 starting from butanol Ether, this polyoxyethylene ether contains the oxirane group that mol percent is 45% and the propylene oxide group that mol percent is 55%, then 150g low hydrogen-containing polysiloxane (hydrogen content is 0.15%) Add it into a four-neck flask, start stirring, heat to 80°C with a heating mantle, stir for 5 minutes, add chloroplatinic acid ethanol solution, after adding chloroplatinic acid ethanol solution, the concentration of chloroplatinic acid in the entire reaction system is 15ppm. After reacting for 3 hours, a clear and transparent light yellow liquid is obtained, which is the silicone copolymer surfactant. The hydroxyl value is 0 according to GB / T ...

Embodiment 2

[0020] The preparation of embodiment 2 organosilicon copolymer surfactants

[0021] In a 500ml four-neck flask with a fixed device, constant temperature function, mechanical stirring, thermocouple and nitrogen, add 350g of polyoxyethylene with an average molecular weight of 2200 and an allyl chloride terminated with ethylene glycol butyl ether. Ether, polyoxyethylene ether contains 45% oxirane groups by mole percent and 55% propylene oxide groups by mole percent, and then 150g of low hydrogen-containing polysiloxane (0.15% hydrogen content) is added In the four-neck flask, start stirring, use a heating mantle to heat to 80°C, stir for 5 minutes, add chloroplatinic acid ethanol solution, after adding chloroplatinic acid ethanol solution, make the concentration of chloroplatinic acid in the entire reaction system 15ppm. After reacting for 3 hours, a clear and transparent light yellow liquid is obtained, which is the silicone copolymer surfactant. The hydroxyl value is 0 accordin...

Embodiment 3

[0022] The preparation of embodiment 3 organosilicon copolymer surfactants

[0023] In a 500ml four-neck flask with a fixed device, constant temperature function, mechanical stirring, thermocouple and nitrogen gas, add 350g of polyoxyethylene with an average molecular weight of 2300 and an allyl chloride terminated with ethylene glycol propyl ether. Ether, polyoxyethylene ether contains 45% oxirane groups by mole percent and 55% propylene oxide groups by mole percent, and then 150g of low hydrogen-containing polysiloxane (0.15% hydrogen content) is added In the four-neck flask, start stirring, use a heating mantle to heat to 80°C, stir for 5 minutes, add chloroplatinic acid ethanol solution, after adding chloroplatinic acid ethanol solution, make the concentration of chloroplatinic acid in the entire reaction system 15ppm. After reacting for 3 hours, a clear and transparent light yellow liquid was obtained, which was the organosilicon copolymer surfactant with a hydroxyl value...

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Abstract

The invention provides a preparation method of an organosilicon surfactant used for preparing polyurethane rigid foam. According to the preparation method, a monohydroxyl polyether taking a monohydric alcohol or an alkyl alcohol ether as an initiator is reacted with allyl chloride or methyl allyl chloride so as to obtain allyl polyoxyethylene ether or polyoxyethylene ether; by weight, the allyl polyoxyethylene ether or polyoxyethylene ether, and a low hydrogen containing polysiloxane are weighted at a weight ratio of 300-400:100-200; the allyl polyoxyethylene ether or polyoxyethylene ether is introduced into a container, then the low hydrogen containing polysiloxane is added, stirring is carried out, heating to 75 to 85 DEG C is carried out, a catalyst is added, and copolymerization reaction is carried out so as to obtain the organosilicon copolymer surfactant. The organosilicon copolymer surfactant is capable of realizing self-emulsifying in mixing with water, the appearance is transparent, and the organosilicon copolymer surfactant is capable of improving the skin of polyurethane rigid foam.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a surfactant, in particular to a preparation method of an organic silicon surfactant used for preparing polyurethane rigid foam. Background technique [0002] The existing silicone surfactants used to prepare polyurethane rigid foams all use hydrogen-containing silicone oil and allyl alcohol as the initiator, and the allyl polyether reaction of the alkylation reaction of ethylene oxide and propylene oxide The allyl polyether that is usually used in the preparation of silicone surfactants for rigid polyurethane foams is an unblocked polyether. [0003] Although the end-capping rate of allyl polyether terminated by acetyl group is high, some products can reach 98% end-capping rate, but the silicone surfactant prepared by this kind of allyl polyether is mixed with water and amine catalyst It will appear milky, opaque, and will deteriorate immediately after mixing, which will affect t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/46
CPCC08G77/46
Inventor 信延垒张文凯宋慧唐突
Owner SHANGHAI MAIPU NEW MATERIAL TECH CO LTD
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