Organosilicon surfactant and application thereof in preparation of polyurethane flexible foam

Abstract

The invention provides an organosilicon surfactant. The organosilicon surfactant has the following general formula: MDxD'yD ''zM, wherein M is selected from any one of (CH3) 3SiO1 / 2 and (CH3) 2RSiO1 / 2, D is (CH3) 2SiO2 / 2, D'is (CH3) 2 (R) SiO2 / 2, D ''is (CH3) 2 (R') SiO2 / 2, x + y + z is 70-100, x is 68-98, y is 1-16, and z is 1-16. The invention also provides an application of the organic siliconsurfactant in polyurethane flexible foam. Alkynediol polyether, high-molecular-weight hydrogen-containing silicone oil and at least one alkynediol polyether are introduced, and a high-molecular organosilicon copolymer surfactant is formed through hydrosilylation. The preparation method is used for preparing the polyurethane flexible foam, and the rebound resilience of the polyurethane flexible foam can be improved.

Description

technical field

[0001] The invention belongs to the field of chemical industry and relates to a flexible polyurethane foam, in particular to an organosilicon surfactant and its application in the preparation of a flexible polyurethane foam. Background technique

[0002] Flexible polyurethane foam (commonly known as sponge) is usually made of polyether polyol or polyester polyol, water, amine catalyst, silicone surfactant, tin catalyst, physical blowing agent, other additives and isocyanate at high speed. Mixing under low pressure, polyol, water and isocyanate react rapidly under the action of the catalyst to form a foam with a network structure. Expand, finally the gas inside the foam volatilizes from the foam, and the foam reaches the maximum volume. After the gas volatilizes, the foam slightly falls back, and it is basically formed after five minutes.

[0003] CN102015838A discloses a kind of organosilicon surfactant for preparing low-density polyurethane foam, by introdu...

Examples

Embodiment 1

[0048] Preparation of Silicone Surfactant

[0049] In a 250L reaction kettle with fixture, constant temperature function, mechanical stirring, thermocouple and nitrogen gas, add 32.8kg 2,5,8,11-tetramethyl-6-dodedecyne-5,8- The starting average molecular weight of diol is 550 Daltons of acetylene glycol polyoxyethylene ether (called polyether A). In the structural formula of acetylene glycol polyether, acetylene glycol group: propylene oxide group: ring The molar ratio of oxyethylene groups is 1:1:4; 150kg of polyoxyethylene ether (called polyether B) with an average molecular weight of 3000 Daltons (called polyether B) initiated by allyl alcohol is added. In B, the molar ratio of ethylene oxide group and propylene oxide group is 1:1.2, then 70kg low hydrogen-containing polysiloxane ( MD for short 80 D' 7 M) Put it into a four-neck flask, start stirring, heat to 80°C with a heating mantle, stir for 5 minutes, add 15ppm of Pt chloroplatinic acid ethanol solution, and react ...

Embodiment 2

[0051] Preparation of Silicone Surfactant

[0052] In a 250L four-neck flask with a fixture, constant temperature function, mechanical stirring, thermocouple and nitrogen, add 53kg of 4,7-dimethyl-5-decyne-4,7-diol starting A polyoxyethylene ether with an average molecular weight of 700 Daltons terminated by a methyl group (referred to as polyether A). The molar ratio of the alkyl group is 1:1:10; add 110kg of polyoxyethylene ether (called polyether B) with an average molecular weight of 3000 Daltons (called polyether B) initiated by allyl alcohol. , the mol ratio of oxirane group and propylene oxide group is 1:1, then 63kg low hydrogen-containing polysiloxane ( M'D for short 40 D' 5 M') into a four-neck flask, start stirring, heat to 80°C with a heating mantle, stir for 5 minutes, add 15ppm of Pt chloroplatinic acid ethanol solution, and react for 4 hours to obtain a clear and transparent light yellow organic silicon copolymer liquid , the organosilicon copolymer is pump...

technical field

[0001] The invention belongs to the field of chemical industry and relates to a flexible polyurethane foam, in particular to an organosilicon surfactant and its application in the preparation of a flexible polyurethane foam. Background technique

[0002] Flexible polyurethane foam (commonly known as sponge) is usually made of polyether polyol or polyester polyol, water, amine catalyst, silicone surfactant, tin catalyst, physical blowing agent, other additives and isocyanate at high speed. Mixing under low pressure, polyol, water and isocyanate react rapidly under the action of the catalyst to form a foam with a network structure. Expand, finally the gas inside the foam volatilizes from the foam, and the foam reaches the maximum volume. After the gas volatilizes, the foam slightly falls back, and it is basically formed after five minutes.

[0003] CN102015838A discloses a kind of organosilicon surfactant for preparing low-density polyurethane foam, by introdu...

Examples

Embodiment 1

[0048] Preparation of Silicone Surfactant

[0049] In a 250L reaction kettle with fixture, constant temperature function, mechanical stirring, thermocouple and nitrogen gas, add 32.8kg 2,5,8,11-tetramethyl-6-dodedecyne-5,8- The starting average molecular weight of diol is 550 Daltons of acetylene glycol polyoxyethylene ether (called polyether A). In the structural formula of acetylene glycol polyether, acetylene glycol group: propylene oxide group: ring The molar ratio of oxyethylene groups is 1:1:4; 150kg of polyoxyethylene ether (called polyether B) with an average molecular weight of 3000 Daltons (called polyether B) initiated by allyl alcohol is added. In B, the molar ratio of ethylene oxide group and propylene oxide group is 1:1.2, then 70kg low hydrogen-containing polysiloxane ( MD for short 80 D' 7 M) Put it into a four-neck flask, start stirring, heat to 80°C with a heating mantle, stir for 5 minutes, add 15ppm of Pt chloroplatinic acid ethanol solution, and react ...

Embodiment 2

[0051] Preparation of Silicone Surfactant

[0052] In a 250L four-neck flask with a fixture, constant temperature function, mechanical stirring, thermocouple and nitrogen, add 53kg of 4,7-dimethyl-5-decyne-4,7-diol starting A polyoxyethylene ether with an average molecular weight of 700 Daltons terminated by a methyl group (referred to as polyether A). The molar ratio of the alkyl group is 1:1:10; add 110kg of polyoxyethylene ether (called polyether B) with an average molecular weight of 3000 Daltons (called polyether B) initiated by allyl alcohol. , the mol ratio of oxirane group and propylene oxide group is 1:1, then 63kg low hydrogen-containing polysiloxane ( M'D for short 40 D' 5 M') into a four-neck flask, start stirring, heat to 80°C with a heating mantle, stir for 5 minutes, add 15ppm of Pt chloroplatinic acid ethanol solution, and react for 4 hours to obtain a clear and transparent light yellow organic silicon copolymer liquid , the organosilicon copolymer is pump...

Images