Nano calcium carbonate modified by polyether carboxylate, sealant comprising nano calcium carbonate and preparation method of sealant

A technology of nano-calcium carbonate and polyether carboxylate, which is applied in the field of sealants, can solve problems such as uneven dispersion of nano-calcium carbonate, and achieve the effects of easy operation and simple preparation process

Active Publication Date: 2018-05-04
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This application overcomes the defect of uneven dispersion of nano-calcium carbonate in the medium in the prior art, improves the mechanical properties of the material, and provides a modification method and application of polyether carboxylate to nano-calcium carbonate

Method used

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  • Nano calcium carbonate modified by polyether carboxylate, sealant comprising nano calcium carbonate and preparation method of sealant
  • Nano calcium carbonate modified by polyether carboxylate, sealant comprising nano calcium carbonate and preparation method of sealant
  • Nano calcium carbonate modified by polyether carboxylate, sealant comprising nano calcium carbonate and preparation method of sealant

Examples

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preparation example Construction

[0043] The invention provides a preparation method of polyether carboxylate, the number average molecular weight of the modified polyether is 333-1313g / mol, and its structure is shown in the following general formula I:

[0044]

[0045] Among them, R is straight chain or branched C 6 -C 18 The alkyl group, n=4-18, n is an integer.

[0046] In the present invention, the R is preferably a linear or branched C 6 -C 18 Alkyl, preferably branched C 8 -C 15 Alkyl, preferably branched C 8Alkyl, branched C 10 Alkyl or branched C 13 of alkyl. In a specific embodiment of the present invention, the branched C 8 The alkyl group of is preferably the alkyl moiety of 6-methyl-1-heptanol. The branched C 10 The alkyl group is preferably EXXAL TM The alkyl moiety of 10. The branched C 13 The alkyl group is preferably EXXAL TM The alkyl moiety of 13. Wherein, the 6-methyl-1-heptanol (CAS No. 26952-21-6) and the EXXAL TM 8 (CAS No. 68526-83-0) are all isooctyl alcohols. The ...

Embodiment 1

[0092] In the present embodiment, the nano-calcium carbonate modified by polycarboxylate is prepared by the following method, and the method steps are as follows:

[0093] (1) Material preparation: Weigh 20g of nano-calcium carbonate, add it to a three-necked flask, then add 80ml of water to form a suspension, keep at 80°C and stir;

[0094] (2) Add polyether carboxylate into a three-necked flask, and stir for 1 h;

[0095] (3) Vacuum suction filtration while hot with a Buchner funnel;

[0096] (4) Transfer the product to a clean crucible and place it at 115°C for drying;

[0097] (5) Grinding the dried material is modified nano-calcium carbonate.

[0098] The structure of the polyether carboxylate used in the present embodiment is shown in following general formula I:

[0099]

[0100] Wherein, R is n-octyl, n is 9, and M is Na.

Embodiment 2-4

[0102] Examples 2-4 relate to the preparation of a sealant containing polyether carboxylate-modified nano-calcium carbonate prepared according to Example 1.

[0103] The sealant in embodiment 2-4 is prepared by following method, and this method step is as follows:

[0104] (1) Prepare materials: prepare materials according to the mass percentage of silane modified polyether sealant;

[0105] (2) Use double planetary mixer for mixed production: put light calcium, heavy calcium, silane modified polyether resin, coupling agent, plasticizer and accelerator into the material tank, and stir evenly;

[0106] (3) Add light stabilizer, stir at high speed until the dispersion is uniform, and there are no particles in the material;

[0107] (4) be heated up to 100-150 ℃, vacuumize and keep warm for 1-3 hours;

[0108] (5) Cool down to 30-60°C and stop the vacuum;

[0109] (6) Add the catalyst, stir evenly, and degas the glue.

[0110] Silane-modified polyether sealant, the sealant in...

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Abstract

The invention relates to nano calcium carbonate modified by polyether carboxylate, sealant comprising the nano calcium carbonate modified by the polyether carboxylate and a preparation method of the sealant comprising the nano calcium carbonate modified by the polyether carboxylate. Nano calcium carbonate is modified by polyether carboxylate, and the modified nano calcium carbonate can improve compatibility with the material and improves mechanical properties of the material. The preparation method for the sealant is simple, and is easy to operate.

Description

technical field [0001] This application relates to the technical field of sealants. Specifically, the application relates to a polyether carboxylate modified nano-calcium carbonate, a sealant comprising polyether carboxylate-modified nano-calcium carbonate, the preparation of polyether carboxylate-modified nano-calcium carbonate Method, and the preparation method of the sealant comprising polyether carboxylate modified nano-calcium carbonate. Background technique [0002] Nano-calcium carbonate is filled into polymer materials as a filler, which can improve various properties of polymer materials. Filling calcium carbonate in plastic products can not only significantly reduce its cost, but also improve the hardness, elastic modulus, dimensional stability and thermal stability of the product. In addition, nano-calcium carbonate also has a certain reinforcing effect. Compared with ordinary particles and bulk materials, nano-scale calcium carbonate inorganic particles have u...

Claims

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Application Information

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IPC IPC(8): C08L71/00C08K13/06C08K9/04C08K3/26C09C1/02C09C3/10
CPCC08K3/26C08K9/08C08K13/06C08K2003/265C08K2201/011C08K2201/014C09C1/021C09C3/006C09C3/10C08L71/00
Inventor 董建国何志强李欣怡谢琼春
Owner SHANGHAI DONGDA CHEM
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