Universal polyurethane foam stabilizer and preparation method thereof

A polyurethane foam and foam stabilizer technology, which is applied in the field of polyurethane foam stabilizer and its preparation, can solve the single structure design and preparation process requirements of polyurethane soft foam or hard foam stabilizer, and the use of polyurethane foam stabilizer Single, limited polyurethane foam foaming applicability and other problems, to achieve the effect of uniform cell size, uniform cell distribution, and good stability

Inactive Publication Date: 2019-01-22
SHANGHAI RESIN FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional manufacturers of polyurethane foam stabilizer use solvent method to produce, and the use of solvent brings problems such as cumbersome process, environmental pollution and cost increase.
[0004] In addition, the polyurethane foam stabilizers of almost all manufacturers on the market have a single purpose, and are only suitable for the preparation of rigid polyurethane foam or flexible polyurethane foam, which limits the scope of use and the applicability of polyurethane foam at the border of soft and hard
At present, there is no general-purpose polyurethane foam stabilizer suitable for polyurethane rigid foam and polyurethane soft foam. Mature

Method used

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  • Universal polyurethane foam stabilizer and preparation method thereof
  • Universal polyurethane foam stabilizer and preparation method thereof
  • Universal polyurethane foam stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of low hydrogen silicone oil:

[0050] Mix 78 parts of octamethylcyclotetrasiloxane with 20 parts of high hydrogen-containing silicone oil, dehydrate at 60°C and -0.1MPa for 1.5 hours, and add 3 parts of strong acid macroporous ion exchange under the protection of high-purity nitrogen Resin, after the viscosity of the system increases visually, add 2 parts of end-capping agent hexamethyldisiloxane, keep it at 70°C for 3 hours, remove unreacted low molecular weight at 135°C at -0.1MPa, cool and filter to obtain a transparent Low hydrogen silicone oil.

Embodiment 2

[0052] Preparation of low hydrogen silicone oil:

[0053] Mix 89 parts of octamethylcyclotetrasiloxane with 9 parts of high hydrogen-containing silicone oil, dehydrate at 70°C and -0.1MPa for 0.5h, and add 4 parts of strong acid macroporous ion exchange under the protection of high-purity nitrogen Resin, after the viscosity of the system increases visually, add 1 part of end-capping agent hexamethyldisiloxane (MM), keep it at 60°C for 5 hours, remove unreacted low molecular weight at -0.1MPa at 140°C, cool and filter, Obtain transparent low-hydrogen silicone oil.

Embodiment 3

[0055] Preparation of low hydrogen silicone oil:

[0056] Mix 83 parts of octamethylcyclotetrasiloxane with 15 parts of high hydrogen-containing silicone oil, dehydrate at 65°C and -0.1MPa for 1 hour, and add 5 parts of strong acid macroporous ion exchange resin under the protection of high-purity nitrogen , after the viscosity of the system increased visually, add 3 parts of end-capping agent hexamethyldisiloxane, react at 60°C for 5h, remove unreacted low molecular weight at -0.1MPa at 145°C, cool and filter to obtain transparent low-molecular-weight Hydrogen silicone oil.

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Abstract

The invention discloses a universal polyurethane foam stabilizer and a preparation method thereof. According to the present invention, the hydrosilylation reaction of low-hydrogen-content silicone oiland allyl polyether is performed with a solvent-free method, such that the obtained product does not require solvent remove, and does not contain inorganic acids, the process is simple and environmentally friendly, and the cost is saved; the special molecular weights and the ratio of low-hydrogen-content silicone oil and allyl polyether are designed, and the conversion rate of the C=C reaction between Si-H and allyl polyether is controlled, such that the universal polyurethane foam stabilizer can simultaneously meet the foaming requirements of hard foam polyurethane foam and soft foam polyurethane foam, and has good actual foaming effect, the obtained polyurethane soft foam and the obtained polyurethane hard foam have characteristics of uniform pore size and uniform foam distribution, each surface of the obtained soft foam and the obtained hard foam approximately comprises five edges, and the pore size of the foam body is 100-1000 [mu]m; and the universal polyurethane foam stabilizeris a polymer having a structural fragment represented by a formula (1) defined in the specification.

Description

technical field [0001] The invention relates to a foam stabilizer for polyurethane foam and a preparation method thereof. Background technique [0002] Polyether modified silicone oil is a kind of non-ionic surfactant, because it has both the lipophilicity of silicone oil and the hydrophilicity of polyether, it has good emulsification and foam stabilization. It is used as a foam stabilizer for polyurethane foam. One of its most important and widespread uses. [0003] Traditional manufacturers of polyurethane foam stabilizers use solvent methods for production, and the use of solvents brings problems such as cumbersome processes, environmental pollution, and increased costs. [0004] In addition, almost all polyurethane foam stabilizers on the market have a single purpose, and are only suitable for the preparation of rigid polyurethane foam or flexible polyurethane foam, which limits the scope of use and the applicability of polyurethane foam at the boundary between soft and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00C08L75/04C08G77/46
CPCC08G77/46C08J9/0042C08J2375/04
Inventor 何辛李德全姚慧敏高晟弢吴蓁
Owner SHANGHAI RESIN FACTORY
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