阅读说明：本技术 一种高性能低成本胶粉基复合弹性体的制备方法 (Preparation method of high-performance low-cost rubber powder-based composite elastomer ) 是由 王艳秋 祝木伟 鲍桂楠 姚亮 张小萍 刘太闯 靳玲 翁国文 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种高性能低成本胶粉基复合弹性体的制备方法,其中高聚物包括生胶、环保高强力轮胎再生胶TRR和活化胶粉GTR,生胶总用量为21份、TRR为49份、GTR为30份；硫化体系配合剂包括硫化剂S<Sub>8</Sub>、促进剂CZ、三乙醇胺、氧化锌、硬脂酸、以及白碳黑；根据GB/T1702-1997对试样进行性能检测,拉伸强度最高可达19.8 MPa、扯断伸长率为624.8%,能满足农用胎、力车胎等各种汽车配件、防水卷材等建筑材料、各种电器用材料的性能需要,上述高聚物总用量一般占原材料成本的55%,采用本发明的复合弹性体来取代生胶,在保持物理、工艺和环保性能的前提下,原材料成本能下降49-70%。(The invention disclosesa preparation method of a high-performance low-cost rubber powder-based composite elastomer is disclosed, wherein a high polymer comprises 21 parts of crude rubber, 49 parts of TRR and 30 parts of GTR, wherein the TRR is an environment-friendly high-strength tire reclaimed rubber, and the GTR is activated rubber powder; the vulcanizing system compounding agent comprises a vulcanizing agent S 8 Accelerator CZ, triethanolamine, zinc oxide, stearic acid, and white carbon black; according to GB/T1702-1997, the performance test of the sample is carried out, the tensile strength can reach 19.8 MPa to the maximum, the elongation at break is 624.8%, the performance requirements of various automobile parts such as agricultural tires and hand-drawn tires, building materials such as waterproof rolls and various electric appliance materials can be met, the total consumption of the high polymer generally accounts for 55% of the cost of the raw materials, the composite elastomer provided by the invention is adopted to replace raw rubber, and the cost of the raw materials can be reduced by 49-70% on the premise of keeping physical, process and environmental performance.)

1. a preparation method of a high-performance low-cost rubber powder-based composite elastomer is characterized by comprising the following steps:

The raw materials and the parts by weight are as follows:

natural rubber NR … … … … … … … … … … 3.5.5 parts

SBR … … … … … … … … … 10.5.5 parts

Butadiene rubber BR … … … … … … … … … … 7.0.0 parts

TRR … … … 49.0.0 parts of environment-friendly high-strength tire reclaimed rubber

Activating glue powder GTR … … … … … … … … … 30.0.0 parts

Regeneration activator 510 … … … … … … … … … 2.0.0 parts

10.0 to 20.0 portions of white carbon black … … … … … … … … … … … … 10.0

Vulcanizing agent S₈… … … … … … … … … … … … 2.0.0 parts

Promoter CZ … … … … … … … … … … … 0.8 part

Triethanolamine … … … … … … … … … … … … 1.0.0 parts

Active agent ZnO … … … … … … … … … … … 5.0.0 parts

active agent SA … … … … … … … … … … … … 5.0.0 parts

Anti-aging agent 2246 … … … … … … … … … … … 1.0.0 parts

… … … … … … … … … … … … … … 1.0.0 parts of paraffin wax

The preparation method comprises the following steps:

Step 1) firstly weighing each raw material substance, plasticating natural rubber NR and butadiene rubber BR for 5min at normal temperature, and then mixing to obtain raw rubber composite rubber for later use;

The environment-friendly high-strength tire reclaimed rubber TRR is passed through the rubber at normal temperature for 10 times for standby;

Adding 80-mesh activated rubber powder GTR and a regeneration activator 510 into an autoclave for activation, and rolling for 20 times at normal temperature after activation to prepare active rubber for later use;

plasticating Styrene Butadiene Rubber (SBR) at normal temperature until the surface is smooth, and then sequentially adding white carbon black, triethanolamine, zinc oxide and stearic acid into the Styrene Butadiene Rubber (SBR) plasticated rubber to prepare styrene butadiene rubber compound for later use;

Mixing the raw rubber composite rubber and the environment-friendly high-strength tire reclaimed rubber TRR for 15min according to the proportion requirement to obtain mixed rubber; after the mixed rubber is coated on a roller on an open mill, adding the butylbenzene mixed rubber and the active rubber, then adding the accelerant and the sulfur, and uniformly mixing for 12 min;

Step 2) performance detection is carried out according to GB/T1702-1997.

2. The preparation method of the high-performance low-cost rubber powder-based composite elastomer as claimed in claim 1, is characterized in that: the styrene butadiene rubber SBR is plasticated at normal temperature until the surface is smooth, namely the styrene butadiene rubber SBR is plasticated at normal temperature for 5min until the surface is smooth and clean, and the roll spacing is 0.50 mm.

Technical Field

The invention relates to a preparation method of a high-performance low-cost rubber powder-based composite elastomer, belonging to the field of new rubber material manufacturing.

background

The middle-high grade rubber product is generally prepared by mixing raw rubber NR, BR and SBR, the rubber content is generally 50 percent, the price of the raw rubber is basically 1.2 ten thousand yuan/ton, the price of the high-strength environment-friendly tire reclaimed rubber is 0.26 ten thousand yuan/ton, and the price of rubber powder is 0.10 ten thousand yuan/ton. The raw rubber generally accounts for 55% of the cost of raw materials, so the cost of preparing rubber products by completely using the raw rubber is about 1.1 ten thousand yuan/ton, and many rubber enterprises have tiny profits due to higher raw rubber cost and great step.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention can provide the composite elastomer which is prepared by adding a large amount of environment-friendly high-strength tire reclaimed rubber and rubber powder into raw rubber, and the cost is reduced by 49-70 percent on the premise of ensuring that the composite elastomer has higher physical and mechanical properties, process properties and environment-friendly properties, which are shown in tables 1 and 2; the profit of enterprises is greatly improved on the premise of ensuring the performance of downstream rubber products.

The invention is realized by the following steps, a preparation method of a high-performance low-cost rubber powder-based composite elastomer comprises the following raw materials in parts by weight:

Natural rubber NR … … … … … … … … … … 3.5.5 parts

SBR … … … … … … … … … 10.5.5 parts

butadiene rubber BR … … … … … … … … … … 7.0.0 parts

TRR … … … 49.0.0 parts of environment-friendly high-strength tire reclaimed rubber

Activating glue powder GTR … … … … … … … … … 30.0.0 parts

Regeneration activator 510 … … … … … … … … … 2.0.0 parts

10.0 to 20.0 portions of white carbon black … … … … … … … … … … … … 10.0

Vulcanizing agent S₈… … … … … … … … … … … … 2.0.0 parts

Promoter CZ … … … … … … … … … … … 0.8 part

Triethanolamine … … … … … … … … … … … … 1.0.0 parts

Active agent ZnO … … … … … … … … … … … 5.0.0 parts

Active agent SA … … … … … … … … … … … … 5.0.0 parts

Anti-aging agent 2246 … … … … … … … … … … … 1.0.0 parts

Paraffin … … … … … … … … … … … … … ….1.0 parts

The preparation method comprises the following steps:

Step 1) firstly weighing each raw material substance, plasticating natural rubber NR and butadiene rubber BR for 5min at normal temperature, and then mixing to obtain raw rubber composite rubber for later use;

The environment-friendly high-strength tire reclaimed rubber TRR is passed through the rubber at normal temperature for 10 times for standby;

adding 80-mesh activated rubber powder GTR and a regeneration activator 510 into an autoclave for activation, and rolling for 20 times at normal temperature after activation to prepare active rubber for later use;

plasticating Styrene Butadiene Rubber (SBR) at normal temperature until the surface is smooth, and then sequentially adding white carbon black, triethanolamine, zinc oxide and stearic acid into the Styrene Butadiene Rubber (SBR) plasticated rubber to prepare styrene butadiene rubber compound for later use;

Mixing the raw rubber composite rubber and the environment-friendly high-strength tire reclaimed rubber TRR for 15min according to the proportion requirement to obtain mixed rubber; after the mixed rubber is coated on a roller on an open mill, adding the butylbenzene mixed rubber and the active rubber, then adding the accelerant and the sulfur, and uniformly mixing for 12 min;

Step 2) performance detection is carried out according to GB/T1702-1997.

The preferable scheme of the preparation method of the rubber powder-based composite elastomer with high performance and low cost is as follows: the styrene butadiene rubber SBR is plasticated at normal temperature until the surface is smooth, namely the styrene butadiene rubber SBR is plasticated at normal temperature for 5min until the surface is smooth and clean, and the roll spacing is 0.50 mm.

The invention has the beneficial effects that:

1. The high-performance low-cost rubber powder-based composite elastomer prepared from the raw rubber, the reclaimed rubber and the rubber powder has the maximum tensile strength of 19.0 MPa and the maximum elongation at break of 557.3 percent, is energy-saving and environment-friendly in the processing process, can better meet the performance requirements of various automobile accessories such as agricultural tires and hand-drawn tires, building materials such as waterproof coiled materials and various electric appliance materials, has the physical and mechanical properties such as the tensile strength superior to those of natural rubber NR (specific reference is made to tables 1 and 2), and can be used for producing a plurality of middle-grade and high-grade rubber products.

2. The strength of the rubber compound prepared by the non-polar unsaturated styrene-butadiene rubber and the compounding agent independently is greatly improved, and the SBR is plasticated for 5min at normal temperature (the roller spacing is 0.50 mm) in the mixing process until the surface is smooth and the texture is uniform; then, the white carbon black, the triethanolamine, the zinc oxide and the stearic acid are sequentially added into the styrene-butadiene rubber compound, so that the white carbon black and the styrene-butadiene rubber are favorable for forming more bound rubber, and the strength of the rubber powder-based composite elastomer is improved.

3. Compared with the product prepared by raw rubber, the cost of the rubber powder-based composite elastomer with high performance and low cost is reduced by 66 percent at most.

the middle-high grade rubber product generally adopts Natural Rubber (NR), Butadiene Rubber (BR) and Styrene Butadiene Rubber (SBR) which are used together, the rubber content is generally 50 percent, the price of the crude rubber is basically 1.2 ten thousand yuan/ton, the price of the high-strength environment-friendly tire reclaimed rubber is 0.26 ten thousand yuan/ton, and the price of the rubber powder is 0.10 ten thousand yuan/ton. The raw rubber generally accounts for 55% of the cost of raw materials, and if the composite elastomer provided by the invention is used for replacing the raw rubber, the cost can be reduced by 70% at most on the premise of keeping higher physical and mechanical properties.

The cost reduction is accounted for as follows:

(1) The cost (raw rubber cost) = raw rubber price x rubber content rate/raw rubber to raw material cost ratio =1.20 x 50%/55% =1.09 (ten thousand yuan/ton);

(2) The cost of the rubber product (composite elastomer cost) = (raw rubber price × mass percentage in polymer + TRR price × mass percentage in polymer + rubber powder price × mass percentage in polymer) × gum content ÷ raw rubber ratio to raw material cost) = (1.2 × 0.21+0.26 × 0.49+0.10 × 0.30) × 50% ÷ 55% =0.39 (ten thousand yuan/ton) using the formulation of this example;

(3) The cost is reduced by = (raw rubber cost-composite elastomer cost) × 100%/raw rubber cost = (1.09-0.39) × 100% = 70%.

4. The vulcanizing system adopts a vulcanizing agent S₈2.0 parts by mass, 0.8 part by mass of an accelerator CZ, 1.0 part by mass of triethanolamine, 5.0 parts by mass of zinc oxide and 3.0 parts by mass of stearic acid, so that the high vulcanization speed, the long scorching time and the maximum physical and mechanical properties can be obtained.

5. 30 parts by mass of rubber powder adopts an activation system of 2 parts by mass of the regenerated activator 510 and 2 parts by mass of stearic acid, and the activated rubber powder has higher physical and mechanical properties and environmental protection performance.

Detailed Description

The present invention will be further described with reference to the following examples. Among them, the environment-friendly high tenacity tire reclaimed rubber TRR used in examples 1 to 3 was purchased from Nantong Return rubber Co.