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Process, sweller and secondary dipping liquid for preparing superfine glue powder

A secondary soaking and secondary soaking technology, which is applied in the field of swelling agent and secondary soaking liquid, can solve the problems of solvent hazards, solvent volatilization, and inability to produce, and achieve good safety, stable performance, and easy recycling.

Inactive Publication Date: 2004-08-18
南京斯威特集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, finer fine rubber powder and superfine rubber powder cannot be produced by the existing normal temperature process
At the same time, the existing normal-temperature rubber powder production technology uses a large amount of organic solvents. During the preparation of rubber powder, the solvent volatilizes, which becomes a risk factor for fire; A large amount of solvent remains in the prepared rubber powder, which not only causes the cost to be too high, but also the residual solvent constitutes a hidden danger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Example 1, the preparation of swelling agent, formula: when methylene chloride is 1 + n-butyl acetate 0.3 + isobutyl acetate 0.3 + water 0.15 + NaCO 3 , accounting for 5% by weight of the total weight. Features: (1) Non-flammable, non-explosive, low toxicity, should have self-degradation ability to the environment; (2) Boiling point: 40-65°C; (3) Suitable for winter or low ambient temperature. Key points: (1) The total amount of n-butyl acetate and isobutyl acetate should not exceed 30%, and the amount of addition determines the change of the boiling point; (2) NaCO 3 Essential, but its amount can be considered as appropriate according to the volatilization situation. Preparation: [n-butyl acetate (0-5%) + isobutyl acetate 0-0.05 + water + NaCO 3 ] After stirring, add [dichloromethane + the remaining n-butyl acetate and isobutyl acetate], and seal it after stirring. Dosage: colloidal particles / soaking solution = 1:3.5 (weight ratio). One-time immersion: Soaking refer...

Embodiment 2

[0041] Example 2 is basically the same as Example 1, but the swelling agent formula is: dichloromethane is 1+ n-butyl acetate 0+ isobutyl acetate 0+ water 0.05+NaCO 3 1% by weight of the total weight. The formula of its secondary soaking solution (i.e. water-based solvent) is: water 1, alcohol 0, talcum powder 0.01, ZnO 0, NH 4 Cl or Na 2 CO 3 Appropriate amount.

Embodiment 3

[0042] Embodiment 3 is substantially the same as Example 1, but the swelling agent formula is: dichloromethane (100%)+n-butyl acetate (15%)+isobutyl acetate (150%)+water (7.5%)+ NaCO 3 (2.5% by weight of the total weight). Its secondary immersion solution (ie water-based solvent) formula is: 100% water, 2.5% alcohol, 5% talcum powder, 2.5% ZnO, NH 4 Cl or Na 2 CO 3 Appropriate amount.

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Abstract

The superfine glue powder preparing process includes solvent compounding, the first dipping, eliminating free solvent, the second dipping, grinding, secondary elimination of free solvent, solvent recovery, glue sieving and drying. The sweller used includes polar solvent with volatilization inhibitor and the secondary dipping liquid includes water, alcohol and dispersant. The process has excellent safety, and the product is self-degradable. The sweller is easy to recover and has stable performance, may be reused and is low in cost and its production is easy to control. The superfine glue powder has swelling property maintained, and has low sweller consumption and no aggregation.

Description

technical field [0001] The invention relates to a process method for preparing waste rubber into superfine rubber powder, and a swelling agent and a secondary soaking solution used in the method. Background technique [0002] Making waste rubber into rubber powder is an important technology in the field of material recycling. It can eliminate the pollution of waste rubber products such as waste tires to the environment, and can also increase the reuse rate of valuable rubber resources. U.S. Patent No. US3818976 and Chinese Patent No. 95111135.3 respectively provide techniques for producing rubber powder by freezing. The freezing method can produce very fine superfine rubber powder, but this kind of process needs to consume a lot of electricity, and the production cost is too high, resulting in its lack of commercial competitiveness. At the same time, the shape of the colloidal particles obtained by this process is not ideal, and the performance of combining with other mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08L17/00
Inventor 朱正吼王延儒
Owner 南京斯威特集团有限公司