KR930011219B1 - Preparation of plastic product which is decomposable by light and organism - Google Patents

Abstract

A photo-diodegradable compound is prepd. by (a) mixing 50 wt.part resin, 25 wt.part LLDPE, 20 wt.part fatty acid ester, 3.5 wt.part AS66C1 as electrification preventing agent, 0.5 wt.part stealic acid salt and 1.0 wt.pt IRGANOX as oxidation preventing agent, (b) re-mixing the mixt. with 4.0 wt.pt peroxydiphosphoric acid and 0.1 wt.pt ortho phosphoric acid, and reacting, (c) adding 0.1 wt.pt potassium and 200 wt.pt calcium carbonate into the reactant, and re-reacting to obtain the phosphoric acid salt (I), (d) reacting the mixt. of 55 wt.pt LLDPE, 40 wt.pt fatty acid ester and 5 wt.pt AS11 and ammonium salt to obtain the ammonium ester (II), and (e) mixing 100 wt.pt mixt. of resin and calcium carbonate (mixing ratio = 1:1 - 1:1.2) with 5.5-6.5 wt.pt (I) and 0.1 wt.pt (II) to obtain the final product.

Description

Method for preparing compound having light and biodegradability

The present invention manufactures an additive which is non-toxic and degradable by light and microorganisms, which is used for plastic molding used in the manufacture of various packaging materials, agricultural films, general containers and plastic papers, and is processed by adding the additive to a synthetic resin for molding and processing. It is related with the manufacturing method of the compound which is this easily-blended compound.

In more detail, the present invention is an agricultural film liquid or solid, such as film packaging film, mulch film, industrial product packaging film such as sugar resin, seasonings, fertilizer, etc. It is characterized by the manufacturing method of light and biodegradable additives that are added to make containers containing contents such as acidic and alkaline neutral detergents and plastic papers that can be disposed of, such as paper that is well printed and made of natural pulp. will be.

Here, "compound" refers to a raw material on a pellet formulated so that it can be used as it is without mixing the other raw materials during the molding of the film, container, plastic paper, etc. described above, and "additive" is used in the manufacture of a compound or plastic molded article It refers to the additive ingredient in the crude powder prepared for blending.

파괴(Fragilization

Rupture)에 이르는 일련의 효과를 뜻한다.Further, in the present invention, "non-toxic, light and biodegradable" means that selected photoreactions and biological effects may occur by a biological unit determined by radiation or a radiation group of a predetermined wavelength, that is, expressed as a function of wavelength and energy. The selected photoreaction refers to the photodegradation reaction caused by photon flux under the given conditions such as the location, the altitude of the sun, time, latitude, longitude and atmospheric condition, the scattered flux of the sun and the reflected light from the ground. Degradation and material deformation in which severe chemical attack and physical attack occur under the condition of Saprophytic microorganisms.

Fragilization

Rupture).

Compounds made from these non-toxic, light and biodegradable additives and molded articles using them must have the following properties:

First, it must be nontoxic.

The photoreaction should be simple, the decomposing residues should be harmless and harmless, the photoreaction should not cause other side reactions, and the additives and decomposing residues should not be released except when forced out.

Second, it must be photodegradable.

It must be decomposed to the light energy and, if not used and stored improperly, no reaction should occur during that period.

Third, it must be biodegradable.

The membrane of the starter bacteria must penetrate into the product well and, after a certain period of time, biodegradation must occur rapidly.

In addition, there should be protection, printability, workability, commodity and economic feasibility of contents such as food.

Conventionally, linear low density, low density, medium density and high density polyethylene (LLD-, LD-, MD- & HDPE), EVA, PP, PP-Copolymer and polyvinylidene chloride are used for packaging, agriculture and industrial film production. Each of these products has a good commodity characteristic that can meet the needs of the consumer.

However, as the demand for plastic products increases rapidly today, disposal of these products has become difficult to dispose of, and as a result of the new pollution problems, advanced countries have quarreled with each other. Although the company has focused on research and development, the emergence of new materials with excellent printability, workability, merchandise, and economic feasibility has not been realized, causing problems for disposal after use.

The inventors of the present invention researched in various ways to solve the environmental pollution problem for many years to solve the environmental pollution problem even if it is left in its natural state after use, while maintaining excellent product quality and productability without changing the product knowledge and method used by the consumers. As a result of the test, in-process reactive non-additives, which are non-toxic and light and biodegradable in addition to the requirements of the final product by modifying polyolefin resin raw materials having excellent physical properties and low cost, have been modified. Toxic Photo-Bio degradable) to complete the present invention.

The manufacturing method of the additive is as follows.

As 66 S 1 is a product of BOUSSEY CONTROL of France, stearic acid is a food grade, FDA approved, IRGANOX 1010 is a product name of Tetrakis [methylene 3- (3.5-di tert-4-hydroxy phenyl) propionate] methane , Fatty acid ester is any one of palmitic acid, oleic acid and stearic acid ester.

100 parts by weight of the mixture was mixed well at 80 ° C ± 5 ° C, and 4 parts by weight of the initiator Perxydiphosphoric acid removed with acetone and 0.1 parts by weight of the additive orthophosphoric acid were reacted at 165 ° C ± 5 ° C for 15 minutes, and then 0.1% by weight of Potassium. Part and 200 parts by weight of calcium carbonate were added and mixed vigorously for 5 minutes to terminate the reaction to obtain phosphate.

The reaction residue is removed by blowing purified air at 105 ° C ± 5 ° C for 2 hours to obtain purified phosphate.

○ Synthesis of Ammonium Ether.

55 parts by weight of LLDPE powder, 40 parts by weight of fatty acid ester, and 5 parts by weight of AS11 (manufactured by BOUSSEY CONTROL Co., Ltd.), a composite antistatic agent, were blown with purified air at 165 ° C ± 5 ° C for 2 hours to remove low-boiling substances. After adding 4 parts by weight of a tetravalent ammonium salt in an alkaline state and reacting for 45 minutes, an ammonium ether having a pH of 6.5 to 7.5 was obtained.

Since the phosphate and ammonium ether synthesized in the present invention are grafted on LLDPE, the phosphate is not only compatible with polyolefin-based resins, but in particular, the phosphate has a chemical bond due to an in-process reaction in the presence of a filler. It is a reactive additive in a completely different form than the conventional one which improves the disadvantage of deteriorating physical properties when used to have excellent mechanical properties.

Hereinafter, the examples of the present invention using the phosphate and ammonium ether prepared above are as follows, and the present invention is not limited to the examples.

Example 1

50 parts by weight of HDPE, 50 parts by weight of CaCO ₃ 6.5 parts by weight of phosphate and 0.1 parts by weight of ammonium ether was mixed to prepare a compound.

Example 2

47.5 parts by weight of HDPE, 52.5 parts by weight of CaCO ₃ 5.5 parts by weight of phosphate and 0.1 parts by weight of ammonium ether were mixed to prepare a compound.

Example 3

A compound was prepared by mixing 6.5 parts by weight of phosphate and 0.1 part by weight of ammonium ether to 100 parts by weight of a mixture of PP and CaCO ₃ at the same weight.

The present invention can achieve many effects by using the compound in combination with the reactive additives in the process.

In other words, consumers can maintain their knowledge, customs, or usage as they are already acquainted with, and have good dispersibility and compatibility with other additives. Therefore, the finished product producer can improve the self-degradability by using the compound containing the reactive additive in the process, which can save the labor and time for collection after use, as well as the economic effect without the need for waste incineration facilities. There is no pollution problem, and diversification of general-purpose plastic foams is expected to spread the industry and increase exports.

Claims (2)

50 parts by weight of resin powder, 25 parts by weight of LLDPE powder, 20 parts by weight of fatty acid ester, 1 66 parts by weight of AS 66 C as an antistatic agent, 0.5 parts by weight of stearic acid salt, 1.0 parts by weight of IRGANOX 1010 as antioxidant, and 4 parts by weight of peroxydiphosphoric acid. , 0.1 parts by weight of ortho-phosphate and 0.1 parts by weight of potassium carbonate and 200 parts by weight of calcium carbonate were mixed to produce a phosphate, 55 parts by weight of LLDPE powder, 40 parts by weight of fatty acid ester, and 5 parts by weight of antistatic agent AS11. After the tetravalent ammonium salt was added to the mixture of parts to synthesize ammonium ether, the resin powder and calcium carbonate were contained in an amount of 1: 1 to 1: 1.2 in 100 parts by weight of the mixture of 5.5 to 6.5 parts by weight of phosphate and 0.1 part of ammonium ether. Method for producing a compound, characterized in that the mixture by weight. The method of claim 1, wherein the resin powder is at least one selected from LLDPE, LDPE, MDPE, HDPE, EVA, PP, PP-Copolymer and PVC.