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Method for performing compatibilization treatment on vulcanized rubber powder produced by utilizing waste rubber

A technology of vulcanized rubber powder and waste rubber, which is applied in the fields of recycling technology, mechanical material recycling, plastic recycling, etc., can solve problems such as non-continuous operation, complex process, high surface tension, etc., and achieve continuous production, continuous production, process The effect of simplifying the process and improving compatibility

Inactive Publication Date: 2011-12-07
刘扬生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the direct use of untreated vulcanized rubber powder (even if it is of high fineness) is still a network structure, chemically cross-linked, and physically condensed polymer structure like vulcanized rubber, and its surface activity is very low. The compatibility of the matrix material used is poor, so its application dosage is very low, the application range is small, and the use value is not high
At present, the methods of surface activation and modification of vulcanized rubber powder are all carried out after the vulcanized rubber powder with a certain fineness requirement has been prepared, and special equipment and heating energy are required. The process is complicated, continuous operation is not possible, and the efficiency is low. , high energy consumption
And because the fundamental problem of compatibility with the blended matrix material is not properly solved, the mixed components of the blend system are still divided into independent phases, the interphase adhesion is small, the surface tension is large, the compatibility is not good, and it cannot be effectively used. Improve the effect of blending applications

Method used

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  • Method for performing compatibilization treatment on vulcanized rubber powder produced by utilizing waste rubber
  • Method for performing compatibilization treatment on vulcanized rubber powder produced by utilizing waste rubber

Examples

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Embodiment 1

[0022] Embodiment 1: Compatibilization treatment of vulcanized rubber powder mixed with rubber products

[0023] After the waste rubber tires containing 30% (weight) of natural rubber, 35% (weight) of styrene-butadiene rubber and 35% (weight) of butadiene rubber are removed, they are cut into coarse rubber particles with a particle size of 2.5 mm ± 0.5 mm, and sent to Put into mixing agitator 1, drop into compound auxiliary agent according to the following proportion simultaneously: crushing auxiliary agent: hydrophobic silicon dioxide, 1.0%; Active dispersant: glyceryl monostearate, 1.0%, calcium stearate, 0.5%; The compatibilizing modifier is determined according to the blending purpose, and it is blended with non-polar rubber (such as natural rubber / NR, isoprene rubber / IR, styrene-butadiene rubber / SBR, butadiene rubber / BR, butyl rubber / IIR, Propylene rubber / EPM / EPDM), use C5 aliphatic hydrocarbon resin or C5 aliphatic hydrocarbon resin and C9 aromatic hydrocarbon resin

[...

Embodiment 2

[0027] Embodiment 2: Compatibilization treatment of vulcanized rubber powder mixed with plastic products

[0028] The raw material components of waste rubber tires contain 20% (weight) of natural rubber, 30% (weight) of styrene-butadiene rubber and 50% (weight) of butadiene rubber. The process operation steps are the same as in Example 1, the difference is the kind and proportioning of compounding additives. Grinding aid: sodium salt of maleic acid-acrylic acid copolymer, 1.0%; active dispersant: glyceryl tristearate, 1.0%, zinc stearate, 0.5%; compatibilizing modifier is determined according to the purpose of blending, For non-polar plastics (such as polyethylene / PE, polypropylene / PP, polystyrene / PS), use ethylene-methyl acrylate copolymer resin, or ethylene-ethyl acrylate copolymer resin, or ethylene- Butyl Acrylate Copolymer Resin, 3.0%. For polar plastics (such as vinyl polyvinyl chloride / PVC), use styrene-butadiene copolymer resin, or styrene-methyl methacrylate copolym...

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Abstract

The invention relates to a method for performing compatibilization treatment on vulcanized rubber powder prepared by utilizing waste rubber and belongs to the technical field of a waste rubber recycling process. The method comprises the following process steps of: cutting waste rubber into blocks and removing impurities, and cutting and pulverizing the blocks into coarse rubber particles with a particle diameter of between 2 and 3 mm; sending the coarse rubber particles into a mixing stirrer, adding a composite additive into the mixing stirrer, fully mixing the mixture and sending mixture into a pulverizer for pulverization and refinement, wherein the pulverization and refinement of the coarse rubber particles and the compatibilization treatment on the vulcanized rubber powder are simultaneously completed; and performing fineness classification by a fineness classifier to obtain a vulcanized rubber powder product which meets the fineness requirement and is already compatibilized. The method effectively improves the dispersion uniformity, interface compatibility and bonding strength of a vulcanized rubber powder product treated by compatibilization, can enlarge the application range, and improve the use value.

Description

(1) Technical field [0001] The invention relates to a method for volume-increasing treatment of vulcanized rubber powder produced from waste rubber. The invention belongs to the technical field of recycling waste rubber. (2) Background technology [0002] Crushing waste rubber products such as waste tires (that is, vulcanized rubber) into vulcanized rubber powder is the main way to recycle waste rubber at present. Generally speaking, the smaller the particle size of the vulcanized rubber powder, the larger the specific surface area and the better the dispersion uniformity. However, the direct use of untreated vulcanized rubber powder (even if it is of high fineness) is still a network structure, chemically cross-linked, and physically condensed polymer structure like vulcanized rubber, and its surface activity is very low. The compatibility of the matrix material used is poor, so its application dosage is very low, the application range is small, and the use value is not h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/06B29B17/04C08L9/06C08L9/00C08L7/00C08K3/36C08K5/103C08K5/098C08L57/02C08L23/08C08L25/10C08L25/14C08L25/08
CPCY02W30/52Y02W30/62
Inventor 周子凯
Owner 刘扬生
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