JPH04314751A - Antistatic vinyl chloride resin composition - Google Patents

Abstract

PURPOSE:To prepare the title compsn. excellent in antistatic properties without detriment to transparency. thermal stability, processability, etc., by compounding a vinyl chloride resin with a polyhydric alcohol hydroxystearate. CONSTITUTION:The title compsn. is pred. by compounding a vinyl chloride homopolymer or a copolymer contg. at least 50% vinyl chloride units with a polyhydric alcohol hydroxystearate as an antistatic agent. The hydroxystearate is prepd. by the esterification of hydroxystearic acid with a polyhydric alcohol such as glycerin, sorbitan, or trimethylolpropane. Another antistatic agent (e.g. glycerin monostearate) may be compounded together with the hydroxystearate.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vinyl chloride resin composition that has antistatic properties without impairing transparency, thermal stability, processability, etc.

0002

[Prior art] Hard vinyl chloride resin has good transparency;
Although it is used in a wide range of fields due to its excellent strength, it is easily charged with static electricity. Antistatic agents are used to prevent static electricity on hard vinyl chloride resins, but when it comes to kneaded antistatic agents, those that have an antistatic effect tend to have lower transparency and thermal stability. Those with good properties and stability did not have an antistatic effect. For this reason, surface-applied antistatic agents have been used, but there are problems with sustainability of the effect, workability of resin processing, etc., and therefore there is a demand for a kneaded-in antistatic agent.

0003

SUMMARY OF THE INVENTION An object of the present invention is to provide a kneading type antistatic vinyl chloride resin composition that does not impair transparency and thermal stability.

0004

SUMMARY OF THE INVENTION The present invention is an antistatic vinyl chloride resin composition containing a vinyl chloride resin and a polyhydric alcohol hydroxystearate as an antistatic agent.

The polyhydric alcohol hydroxystearate used in the present invention can be produced by esterifying a polyhydric alcohol with hydroxystearic acid. Examples of polyhydric alcohols include glycerin, diglycerin, polyglycerin, sorbitan, pentaerythritol, trimethylolpropane, neopentyl glycol,
Examples include ethylene glycol, propylene glycol, and polyethylene glycol.

[0006] Examples of esters of polyhydric alcohols and hydroxystearic acid include monoesters, diesters, triesters, tetraesters, and mixtures thereof. The vinyl chloride resin is preferably a vinyl chloride homopolymer or a copolymer containing 50% or more of vinyl chloride.

The resin composition of the present invention may contain an antistatic agent other than polyhydric alcohol hydroxystearate. Other antistatic agents include anionic surfactants such as fatty acid salts, sulfuric acid esters, sulfonates, orthophosphoric acid esters, cationic surfactants such as alkylamine salts, alkylimidazole salts, alkyl acid amide salts, etc. Nonionic surfactants, such as condensates of polyethylene oxide and fatty acids, higher alcohols, higher alkylamines, higher fatty acid amides, etc., condensates of fatty acids and alkanolamines, polyhydric alcohols, polyethylene glycol condensates of polyhydric alcohols , polyalkylene monoether, amphoteric surfactants such as betaine, etc. are used.

[0008] When polyhydric alcohol hydroxystearate and other antistatic agents are used together, the proportion of polyhydric alcohol hydroxystearate to the total amount of the antistatic agent should be 5 to 10% or more, particularly 15% or more by weight. It is preferable. The content of the antistatic agent is preferably 1 to 5%, particularly 1.5 to 4%, by weight based on the vinyl chloride resin.

The resin composition of the present invention may contain processing aids, stabilizers, extenders, plasticizers, antioxidants, lubricants,
Additives such as ultraviolet light absorbers and colorants may also be added. Stabilizers include phosphites and fatty acid salts; plasticizers include phthalate esters, phosphate esters, and fatty acid esters; antioxidants include quinones, amines, and phenols; and ultraviolet absorbers include quinones, amines, and phenols. Salicylic acid derivatives, 2-hydroxybenzophenone derivatives, etc. are used. Also,
In order to produce the resin composition of the present invention, no special processing method is required, and conventional resin processing methods can be applied as they are.

0010

[Examples] Examples 1 to 7 The formulations in which each additive other than the antistatic agent was blended with 100 parts of hard vinyl chloride resin are shown below. Table 1 for this ingredient
The antistatic agent shown in 1 was added, kneaded with a roll according to a conventional method, and hot pressed to obtain a sheet with a thickness of 0.5 mm. This sheet was evaluated for antistatic properties, transparency, and heat resistance using the following evaluation methods.

Hard vinyl chloride resin formulation PVC (Nippon Zeon 103EP8)
100 parts by weight MBS (Mitsubishi Rayon C-100S) 10
MMA (〃・P-700)
1 MMA
(〃・P-550)
1 Dioctyl phthalate
5 Butyl stearate

1. Tin mercaptide stabilizer
2 〃
Tin malate stabilizer
1〃PVC
: Polyvinyl chloride MBS : Methacrylic acid ester/butadiene
Styrene copolymer MMA: Methyl methacrylic acid

Surface resistivity: Measured with SM-5E type super megohmmeter manufactured by Toa Denpa Kogyo Co., Ltd. Half-life: Measured with Static Honest Meter S-4104 manufactured by Shishido Shokai Co., Ltd. and Memory Scope V-121B type manufactured by Hitachi Electronics Co., Ltd. Haze: Measured with a Tokyo Denshoku haze meter TC-HIII type Heat resistance: Gear oven (190℃
) to measure the degree of coloration after 30 minutes Conditioning: 23℃ x 5 after pressing
Measured after 24 hours of conditioning at 0%RH

00
13] Comparative Examples 1 to 5 The antistatic agents shown in Table 2 were added to the same ingredients as in Examples 1 to 7, and the products were processed and evaluated in the same manner as in Examples. The Examples and Comparative Examples clearly show that glycerin hydroxystearate improves antistatic ability, and also improves transparency and heat resistance. In addition, when no antistatic agent is added, the surface resistivity is 1014Ω or more, and the half-life is 12
For 0 seconds or more, the haze was 3.0%.

[0014]

[Table 1]

[Table 2]

Claims (1)

[Claims] 1. An antistatic vinyl chloride resin composition comprising a vinyl chloride resin and a polyhydric alcohol hydroxystearate as an antistatic agent.