A method for improving the stability of silicone emulsion
A technology of silicone emulsion and stability, which is used in the fields of improving the stability of silicone emulsion, the preparation of fine chemical additives, and improving the stability of silicone composition emulsion dispersion, which can solve the instability of storage and use of silicone emulsion, etc. question
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Embodiment 1
[0070] Use a side chain hydrogen-containing polysiloxane with a viscosity of 20mPa·s and a hydrogen content of 0.13% (the silicon-hydrogen bond is on the side of the main chain) to react with the allyl alcohol polyether of the following structure:
[0071] ①: EO% = 40%, PO% = 60%, hydroxyl-terminated, average molecular weight 500;
[0072] ②: EO% = 40%, PO% = 60%, hydroxyl-terminated, and the average molecular weight is 800;
[0073] ③: EO% = 40%, PO% = 60%, hydroxyl-terminated, average molecular weight 1600;
[0074] Three polyether-modified polysiloxanes were obtained: PMS-1, PMS-2 and PMS-3.
[0075] At room temperature, add PMS-1, PMS-2 and PMS-3 to the container and mix for 10 minutes, then add 100 parts of organic silicon polymer OSP-1 to it. Organic silicon polymer and polyether modified polysiloxane are fully mixed and even;
[0076] Then add NP-4 and 3 parts of NP-10 to it and mix for 10 minutes; then, slowly add water to the container at a speed of 550rpm until ph...
Embodiment 2
[0078] Use side-chain hydrogen-containing polysiloxane with a viscosity of 2600mPa·s and a hydrogen content of 0.108% (the silicon-hydrogen bond is on the side of the main chain) to react with the allyl alcohol polyether of the following structure:
[0079] ①: PO% = 100%, hydroxyl-terminated, average molecular weight 300;
[0080] ②: PO% = 100%, hydroxyl-terminated, average molecular weight 610;
[0081] ③: PO% = 100%, hydroxyl-terminated, average molecular weight 1100;
[0082] ④: PO% = 100%, hydroxyl-terminated, average molecular weight 4500;
[0083] Four polyether-modified polysiloxanes were obtained: PMS-1, PMS-2, PMS-3 and PMS-4.
[0084] At room temperature, add 8 parts of PMS-1, 6 parts of PMS-2, 4 parts of PMS-3 and 2 parts of PMS-4 into the container and mix for 60 minutes, then add 100 parts of organosilicon polymer OSP-4 to it. As high as 90°C, mix at a speed of 1500rpm for 60 minutes, so that the silicone polymer and polyether-modified polysiloxane are fully mi...
Embodiment 3
[0087] Use side-chain hydrogen-containing polysiloxane with a viscosity of 1000mPa·s and a hydrogen content of 0.23% (the silicon-hydrogen bond is on the side and both ends of the main chain) to react with the allyl alcohol polyether of the following structure:
[0088] ①: EO% = 100%, hydroxyl-terminated, with an average molecular weight of 450;
[0089] ②: EO% = 100%, hydroxyl-terminated, with an average molecular weight of 1500;
[0090] ③: EO% = 100%, hydroxyl-terminated, with an average molecular weight of 4600;
[0091]Three polyether-modified polysiloxanes were obtained: PMS-1, PMS-2 and PMS-3.
[0092] At room temperature, add 4 parts of PMS-1, 5 parts of PMS-2, 6 parts of PMS-3 and 2 parts of PMS-4 into the container and mix for 30 minutes, then add 100 parts of silicone polymer OSP-2 to it. Raise to 65°C, mix at a speed of 3000rpm for 40min, so that the silicone polymer and polyether-modified polysiloxane are fully mixed and uniform;
[0093] Then add 2 parts of MO...
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