JPS59142240A - Chlorine-containing resin composition - Google Patents

Abstract

PURPOSE:To provide a chlorine-contg. resin compsn. for use in the production of agricultural films having excellent anti-stick quality and anti-fogging properties, by blending barium borate with a non-rigid chlorine-contg. resin contg. a surfactant. CONSTITUTION:A plasticizer such as DOP or DOA is added to a chlorine-contg. resin such as vinyl chloride homopolymer or a vinyl chloride/vinyl acetate copolymer to plasticize the resin, and further a surfactant such as sorbitan monostearate or poly-oxyethylene glycerol monostearate is added thereto to prepare a non-rigid chlorine-contg. resin contg. a surfactant. 0.2-3pts.wt. barium borate is blended with the chlorine-contg. resin to obtain the desired chlorine-contg. resin compsn. preferred barium borate includes barium orthoborate, barium metaburate, barium diborate and barium tetraborate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chlorine-containing resin composition for agricultural film, which has excellent droplet properties and fog prevention properties.

Base-containing resins, such as vinyl chloride resin, have heat retention,
Because of its excellent weather resistance and economic efficiency, it is widely used as an agricultural film for cultivation in hax cultivation, tunnel cultivation, etc.

However, if ordinary chlorine composite resin film is used as is for agricultural hax, etc., water droplets will adhere to the film surface, reducing the penetration of sunlight, which is not favorable for crop growth. A certain kind of surfactant is kneaded into the film, called a water drop prevention agent, and is now commercially available and used as a droplet film or a drip-proof film.

However, in haxes and tunnels using agricultural chlorine-containing resin films containing KAI 1111 activators, the droplet resistance is lower than in those using agricultural chlorine-containing resin films that do not contain surfactants. It has become clear that while it has the advantage of having excellent water droplet adhesion, it also has the disadvantage of causing significant fog (sometimes called mist) when the temperature changes rapidly, such as in the morning and evening. It's here.

This fog phenomenon often occurs during the winter, which is the most important period for greenhouse cultivation and tunnel cultivation, and it causes a decline in work efficiency.Although the cause and effect relationship is not clear, it is said that it is easy to cause diseases and causes falling buds and fruits. This is a phenomenon that is highly criticized by horticulturists, as it is said to be the cause of this phenomenon.

Until now, various methods have been proposed to suppress or prevent the occurrence of fog, but none of them have been sufficiently effective, and an effective method has been eagerly awaited.

The inventors of the present invention have conducted various studies in view of this problem, and as a result have found a chlorine-containing resin composition for agricultural films that does not impair droplet flow and has excellent fog prevention properties.

That is, the present invention provides a chlorine-containing resin composition characterized by containing a barium salt of boric acid in a soft chlorine-containing resin containing a surfactant.

The chlorine-containing resin of the present invention is a vinyl chloride homopolymer or a vinyl resin mainly composed of cyclized vinyl, such as a copolymer with vinyl acetate, vinylidene chloride, ethylene, propylene, etc.

In addition, the soft chlorine-containing resin is a chlorine-containing resin that has been made monocrystalline by a plasticizer, and the plasticizers include DOP, D
HP, TCP, D, TDP, DOA.

Examples include polyester plasticizers and aliphatic plasticizers, and they are usually used in an amount of 30 to 70 parts by weight based on the chlorine-containing resin.

Next, the surfactant used in the present invention may be any surfactant that has the effect of preventing water droplet adhesion, but suitable examples include sorbitan monostearate, sorbitan monopalmitate, sorbitan monolaurate, and polyoxy Ethylene Rubitan Monostearate Rubitol Monostearate, Glycerin Monostearate, Polyglycerin Monooleate, Polyoxyethylene Glycerin Monostearate, Silicone Surfactant, Fluorine Surfactant, Pentaerythritol Monostearate These may be used alone or in combination of two or more.

Barium salts of boric acid used in the present invention include barium orthoborate, barium metaborate, barium theborate,
Examples include barium tetraborate, but Agematsu barium metaborate is most suitable for its dispersibility and availability.

Moreover, it is preferable to use these in an amount of usually 0.2 to 0.0 parts by weight based on the chlorine-containing resin.

In addition, in the present invention, various stabilizers, metal soaps, lubricants, organic phosphorous acid It goes without saying that esters, acidic phosphate esters, pigments, antiblocking agents, ultraviolet absorbers, antioxidants, coloring inhibitors, epoxy compounds, etc. may be used.

This will be explained in detail below using examples.

Example 1 The formulation shown in Table 1 was calendered into a film with a thickness of 0.1 m, and a greenhouse with a length of 1.5 m, a width of 60 d, and a height of 50 cm was erected on a farmland. The inside of the greenhouse was visually observed in the morning and evening to evaluate the amount of fog, and the droplet flow on the inner surface of the film was also evaluated. The house was expanded from November 1957 to January 1958.

[Table 1] The composition of the tableware was calendered into a film with a thickness of 0.1 head, and a greenhouse with a length of 1.5 m, a medium of 60 cm, and a height of 59 cm was erected on farmland. In the morning and evening, we visually observed the inside of the NO-US to evaluate the amount of fog, and also evaluated the droplet flow on the inner surface of the film. The House has been in operation since November 1957.
[Table 1] The evaluation in Table 1.1 is as follows.

Fog generation status ◎: No fog generation observed ○: Little fog generation △: Considerable fog generation △:// Many gakana-sho y41f tq 1i1(i
, $ 7゜4Sho Ki Ekishima-cho, ylliz Akira Watanabetsu, +Φ゛around L tsu life (kai)

Claims (1)

[Claims] A chlorine-containing resin composition characterized in that a soft chlorine-containing resin containing a surfactant contains paricum salt of horic acid.