阅读说明：本技术 能有效包容已反应过热固性塑料的电木粉颗粒及制备方法 (Bakelite powder particle capable of effectively containing reacted thermosetting plastic and preparation method thereof ) 是由 顾爱飞 于 2019-02-18 设计创作，主要内容包括：本发明揭示了一种能有效包容已反应过热固性塑料的电木粉颗粒,由以下重量百分比的原料制备而成：酚醛树脂50％～55％；木粉10～40％；矿物填料10～20％；乌洛托品10～13％；着色剂0.5～2％；硬脂酸锌1～3％；氧化镁1～3％。本发明的有益效果是：能有效包容已反应过的热固性塑料,用来与已反应过的热固性塑料颗粒混合,使原先无法再次利用的热固性废料重新变为原料使用。(The invention discloses bakelite powder particles capable of effectively containing reacted thermosetting plastics, which are prepared from the following raw materials in percentage by weight: 50% -55% of phenolic resin; 10-40% of wood powder; 10-20% of mineral filler; 10-13% of urotropin; 0.5-2% of a coloring agent; 1-3% of zinc stearate; 1-3% of magnesium oxide. The invention has the beneficial effects that: can effectively contain the reacted thermosetting plastic for mixing with the reacted thermosetting plastic particles, so that the original non-reusable thermosetting waste is changed into raw materials for use again.)

1. The bakelite powder particles capable of effectively containing reacted thermosetting plastics are characterized by being prepared from the following raw materials in percentage by weight:

50% -55% of phenolic resin;

10-40% of wood powder;

10-20% of mineral filler;

10-13% of urotropin;

0.5-2% of a coloring agent;

1-3% of zinc stearate;

1-3% of magnesium oxide.

2. The bakelite powder particle capable of containing reacted thermosetting plastic effectively as set forth in claim 1, wherein the fineness of the wood powder is 80-100 mesh, the water content is less than or equal to 10%, and the apparent density is 0.15-0.27 g/cm³Ash content is less than 3%.

3. The bakelite powder particle for effective containment of reacted thermoset plastic according to claim 1, wherein the mineral filler is toothpaste grade aluminum hydroxide.

4. The bakelite powder particle capable of effectively containing reacted thermosetting plastics according to claim 1, wherein the particle size of the urotropine is 200-300 mesh.

5. The bakelite powder particle for effective containment of reacted thermoset plastics according to claim 1, wherein the colorant is carbon black.

6. The bakelite powder particle capable of effectively containing reacted thermosetting plastic according to claim 1, wherein the bakelite powder is preferably 10-20%.

7. The method of preparing bakelite powder granules according to claim 1, comprising the following steps:

s1, purifying the wood powder;

s2, mixing the raw material of claim 1 and the wood powder purified by S1 uniformly, plasticating, crushing and granulating.

8. The method of claim 7, wherein the step S1 comprises immersing the wood flour in 3-4 wt% citric acid solution for washing for 2-3 h, filtering, washing with clear water for 0.5-1 h, removing water and drying.

Technical Field

The invention relates to bakelite powder particles and a preparation method thereof, belonging to the technical field of plastic granulation.

Background

Along with the rapid development of social economy and industry, considerable economic benefits are brought, and the living standard of common people is improved. The environmental protection problem is also increasingly paid attention to, and the plastic industry is an indispensable molecule in life and industrial production, as low as family kitchen, and as high as military industry and aerospace, the shadow can be seen everywhere. With the increasing of environmental protection investigation and treatment of government related departments in recent years, a plurality of industrial garbage disposal problems which have to be generated in the plastic industrial production are also deeply troubling a plurality of enterprises.

Plastics can be divided into two broad categories depending on their molding conditions: thermoplastic and thermoset. Thermoplastics have now been subjected to well-established recycling processes because of their relatively simple molding conditions (physical reaction, reversibility). The thermosetting plastic has the congenital advantages that the molding conditions are relatively complex (high temperature and high pressure are needed and chemical reaction is adopted, the molding is irreversible) and the finished product has higher high temperature resistance, aging resistance, strength and other properties than common thermoplastic plastics, so that the field of recycling of the thermosetting plastic is blank at home. The injection molding manufacturer inevitably produces material handles and defective products in the production process, and the total proportion of the material handles and the rejection rate is 15%, so that the amount of waste materials flowing into the society every year can be counted by thousands of tons. The injection molding manufacturers do not have the capacity of treating the industrial garbage and can only uniformly recover, bury and burn the industrial garbage.

Disclosure of Invention

The technical problem to be solved by the invention is to provide bakelite powder particles capable of effectively containing reacted thermosetting plastics and a preparation method thereof, wherein the bakelite powder particles are contained outside the reacted phenolic plastics so as to realize a regeneration process of the phenolic plastics.

The technical problem to be solved by the invention can be realized by the following technical scheme:

the bakelite powder particle capable of containing reacted thermosetting plastic effectively is prepared with the following materials in weight percentage:

50% -55% of phenolic resin;

10-40% of wood powder;

10-20% of mineral filler;

10-13% of urotropin;

0.5-2% of a coloring agent;

1-3% of zinc stearate;

1-3% of magnesium oxide.

Preferably, the fineness of the wood flour is 80-100 meshes, the water content is less than or equal to 10%, the apparent density is 0.15-0.27 g/cm3, and the ash content is less than 3%.

Preferably, the mineral filler is toothpaste grade aluminum hydroxide.

Preferably, the particle size of the urotropin is 200-300 meshes.

Preferably, the colorant is carbon black.

Preferably, the wood flour is 10-20%.

The invention also discloses a preparation method of the bakelite powder particle, which comprises the following steps:

s1, purifying the wood powder;

s2, mixing the raw material of claim 1 and the wood powder purified by S1 uniformly, plasticating, crushing and granulating.

Preferably, step S1 is to immerse the wood powder in citric acid solution with a weight percentage concentration of 3-4% for washing for 2-3 h, filter, wash with clear water for 0.5-1 h, remove water and dry.

The invention has the beneficial effects that: the high content of phenolic resin can effectively contain the reacted thermosetting plastic and is used for mixing with the reacted thermosetting plastic particles, so that the original non-reusable thermosetting waste is changed into raw materials for use again.

The proportion of the wood powder is lower than that of the conventional bakelite powder material, and the proportion of the phenolic resin is about 10-15% higher than that of the conventional bakelite powder material, so that the composite material has higher fluidity and inclusion, more resin provides better adhesiveness and inclusion in the secondary reaction process with reacted thermosetting plastic (especially reacted bakelite powder particles), and the reacted bakelite powder particles with specific particle sizes provide better filling effect, so that the strength after reaction is improved.

The above reactions are all chemical changes and take a long time, and the composite material of the present invention and the reacted thermosetting plastic particles are assumed to have a chemical composition of 6: 4 proportion mixing, in which forty percent of the reacted particles do not participate in chemical changes, only as fillers, the theoretical reaction time is reduced by 40 percent compared with the forming speed of the common material.

Although the resin content of the formula is 10-15% higher than that of the common material, the addition proportion of the finished product material of the formula is only 60-70% in the actual mixing process with the reacted bakelite powder particles, the total consumption is reduced by 30-40%, the requirement on the consumption of raw materials is also reduced, and the formula is more environment-friendly.

Detailed Description

The invention discloses bakelite powder particles capable of effectively containing reacted thermosetting plastics, which are prepared from the following raw materials in percentage by weight:

50% -55% of phenolic resin;

10-40% of wood powder;

10-20% of mineral filler;

10-13% of urotropin;

0.5-2% of a coloring agent;

1-3% of zinc stearate;

1-3% of magnesium oxide.

The invention uses phenolic resin as adhesive, which can meet the requirements of the process on the indexes of resin softening point, viscosity, gel time, etc., and control the content of harmful substances such as free phenol, free formaldehyde, etc., so that the content of free phenol is less than 1 percent, and the invention can meet the indexes of phenol extract and aniline extract.

The invention uses wood flour as a reinforcing material, the fineness of the wood flour is 80-100 meshes, the water content is less than or equal to 10%, and the apparent density is 0.15-0.27 g/cm³Ash content is less than 3%. The wood powder is purified by citric acid, so that soluble impurities can be removed, and the index requirement of the total extract is met. The amount of the wood powder accounts for 10-40% of the weight of the phenolic molding compound which can effectively contain the reacted thermosetting plastic, but the mass ratio of 10-20% is relatively better.

The mineral filler used in the invention is toothpaste-grade aluminum hydroxide, which ensures good heat resistance, flame retardance and electrical insulation performance of the material, and the toothpaste-grade aluminum hydroxide raw material is treated at high temperature of 1200 ℃, so that the toothpaste-grade aluminum hydroxide has stable chemical properties.

The invention uses urotropine as a curing agent, and the particle size is 200-300 meshes. Urotropine itself belongs to a medium-toxicity chemical, ammonia is released in a curing reaction, so the dosage of the urotropine is strictly controlled to control the content of harmful substances such as free ammonia, and the excellent processing performance of the material is ensured to meet the requirements of an injection molding process.

The colorants of the present invention employ carbon black designated as manufactured by cabot corporation, usa. Carbon black produced by the company cabot, usa, has excellent blackness, strong tinting strength and excellent dispersibility and stability, and can meet the index requirements of total extracts.

The additive is lubricant zinc stearate and the curing accelerator is magnesium oxide, wherein the weight percentage of the addition amount of the zinc stearate is 1-3%, and the weight percentage of the addition amount of the magnesium oxide is 1-3%.

The preparation method of the bakelite powder particles comprises the following steps:

s1, purifying the wood powder, immersing the wood powder into a citric acid solution with the weight percentage concentration of 3-4%, washing for 2-3 h, filtering, washing for 0.5-1 h with clear water, dewatering and drying;

s2, mixing the raw material of claim 1 and the wood powder purified by S1 uniformly, plasticating, crushing and granulating.

The present invention is further illustrated by the following examples, but is not limited to the scope of the present invention.