JPS5845246A - Vinyl chloride resin composition having weather resistance - Google Patents

Abstract

PURPOSE:The titled composition useful as a covering material for agriculture, having improved weather resistance, keeping a long-term weather resistance, having improved thermal stability during molding and compatibility with a resin, obtained by blending a vinyl chloride resin with a phosphoric ester containing methyl t-butylphenyl group, etc. CONSTITUTION:100pts.wt. vinyl chloride resin is blended with >=20pts.wt., preferably 0.5-10pts.wt. of a compound shown by the formula (R1-R3 are aryl, and at least one of them is methyl t-butylphenyl), preferably tris-4-methyl-2- t-buthylphenyl phosphate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vinyl chloride resin composition,
In particular, the present invention relates to a weather-resistant vinyl chloride resin composition that is effective for use in agricultural covering materials that require weather-resistant column pipes.

PVC resin film has heat retention, transparency, and strength! - It is currently the mainstream agricultural covering material because it has excellent workability and is relatively inexpensive. However, when used outdoors, vinyl chloride resin films deteriorate due to various factors such as irradiation with sunlight during oxidation, resulting in hardening of the 74 lumen, decreased elongation of the film, dyeing, and discoloration. The durability of K11li was top notch.

In order to eliminate the above-mentioned drawbacks of conventional gloss, vinyl chloride resins are combined with chemicals such as stabilizers, epoxy compounds, phosphoric acid ester hazy agents, antioxidants, and ultraviolet absorbers. Attempts have been made to minimize weather resistance deterioration of the film.

However, even if these chemicals are used in combination, the vinyl chloride resin film deteriorates during outdoor use, and a vinyl chloride resin film that can withstand long-term oraIA* use cannot be obtained.

On the other hand, in recent years, there has been a growing demand for improved durability of vinyl chloride resin films from the viewpoint of resource conservation, and the development of a new weather-resistant vinyl chloride 111N film has been desired.

In view of this situation, the inventors of the present invention conducted extensive research and developed an OR method for vinyl chloride resin.

0tomiP-OR.

\ OR.

(Rt, Rm, Rs are allyl groups, and at least one of them is a methyl tert-butylphenyl group.) A product obtained from a vinyl chloride resin composition obtained by adding a compound having the structure is weather resistant. The present invention has been completed in that the tube has excellent properties and maintains its weather resistance for a long period of time.

That is, the vinyl chloride resin composition of the present invention is a vinyl chloride resin KR10P-OR.

\ OR.

(Rt, Rm, Rs are allyl groups, and at least one of them is a methyl tert-butylphenyl group.

) is added to the compound having the structure.

The vinyl chloride resin of the present invention includes vinyl chloride resin,
Copolymer resins of vinyl chloride and other monomers such as vinyl acetate, ethylene, propylene, alkyl vinyl ethers, acrylic esters, methacrylic esters, and acrylonitrile, as well as blends of these resins and other resins. Friend items etc. can be used.

Also OR.

0 Cabinet F-OR.

\ OR.

(Ate Rye R51t is an allyl group, and at least one of them is a methyl tert-butylphenyl group). Male 7ate, dimethyl tert-butylphenyl monoxylyl 7 male 7A F1 monomethyl tert-butylphenyl dicresyl phosphate, monomethyl tert-butylphenyl dixi-5-lylphos 7ate, etc. can be used to 0% weather resistance. Preferred is tris-4-methyl-2-tert-butylphenyl phosphate.

These compounds may be added alone or in any combination of multiple types. The amount added is preferably 20 parts by weight or less per 100 parts by weight of the vinyl chloride material.
When a molded article is made from a large amount of additives, these compounds tend to bleed out and stain on the narrow side of the molded article, which is undesirable. From these points of view, a more preferable addition amount range is vinyl chloride resin 1
00 parts by weight (from 15 parts by weight to 10 parts by weight).

The vinyl chloride resin composition of the present invention has certain properties that are necessary for processing.
It is possible to use additives and other additives to impart performance for the purpose 2. These additives include:
Plasticizers, stabilizers, epoxy compounds, drip-proofing agents, lubricants, antioxidants, ultraviolet lIIi! Absorbent, antistatic agent, anti-piping agent,
Coloring agents, fillers, etc. As plasticizers, all plasticizers commonly used for vinyl chloride resins can be used in the present invention. Examples include dinonyl 7 tallate and dioctyl 6
- Phthalate, dinonyl 7-thale F1, diindecyl 7-thale, butylbenzyl 7-thale, and other 7-talic acid ester-based lubricating agents, and tricresyl 7-mole 7-A F% Sepatate ester plasticizers such as dioctyl adipate, dioctyl separator, etc., trimellitic acid ester plasticizers such as trioctyl trimellitic acid, and polyester plasticizers alone. Alternatively, any plurality of ms can be used together. The amount of these plasticizers added is not limited to @2, and can be determined depending on the flexibility of the molded product to be obtained.Vinyl chloride-based stabilizers can also be used as stabilizers.
O (1, BIL, Mg.

Metal salts such as Oa, Saku, 8n, and Pb may be used alone or in combination, or in combination with other stabilizing aids.

As the epoxy compound, resin epoxy compounds such as epoxidized soybean oil, epoxidized linseed oil, epoxidized fatty acid monoester, and a polymer of epigastric ruhydrin and bisphenol A can be used.

-7- The vinyl chloride resin composition of the present invention is represented by R10=P-OR1\RB (Rs+R1+"s is an allyl group, at least one of which is a methyl tertiary butyl phenol group). This resin composition has excellent weather resistance and extremely long-lasting weather resistance, as well as excellent thermal stability during molding and good compatibility with resins (4), making it suitable for use as agricultural films. .

Examples of dormitory meetings are shown below, but the present invention is not limited to these examples.

Examples 1 to 5 A 0.1 m film was prepared using the formulations of Examples 1 to 5 shown in the table, and an outdoor 1Iljl test was conducted for one year. Result is! ! Shown below.

Comparative Examples 1 to 3 For the formulations of Comparative Examples 1 to 3 shown in the table, films of α1■ were prepared according to Examples 1 to 5 and fjJ, and the specific aperture, q
58-45246 (3) A test similar to Example 1 was conducted.

The results are shown in the table.

As is clear from the table, in trisallyl phosphate, the film containing the phosphoric acid ester compound having 4-methyl-2-tert-butylphenyl group has extremely good weather resistance and is suitable for long-term use. It is something.

Claims (1)

[Scope of Claims] A weather-resistant vinyl chloride resin composition obtained by adding a compound tube having the following structure to a vinyl chloride resin. RI 0miP-OR. ＼ 01m ("1@ R8, R1 is an allyl group, at least one of which is a methyltert-butylphenyl group.)