JPS633036A - Novel structural material composed of polysulfone - Google Patents

Abstract

PURPOSE:To provide a structural material composed mainly of a polysulfone bonded with an adhesive consisting of a polyester and a polyisocyanate, having remarkably excellent mechanical properties, thermal properties and hot-water resistance and having good bonding workability. CONSTITUTION:The objective structural material is composed mainly of a polysulfone bonded with an adhesive produced by compounding 100pts.wt. of a polyester resin having a number-average molecular weight of 3,000-20,000 and 5-25pts.wt. of a polyisocyanate. The polyester resin is preferably a resin soluble in acetone, toluene, etc. The polyisocyanate is preferably a diphenylmethane-4,4'-diisocyanate compound or a polymethylene polyphenyl polyisocyanate compound.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a novel structural member containing polysulfone as a main component.

(Conventional technology) In recent years, the use of conventional metal materials has become common because high-performance resins are lighter than metals, and also have corrosion resistance and insulation properties that are not found in metal materials. It has come to be frequently used in various structural members, such as frames and driving parts of electrical and electronic equipment, automobiles, aircraft, etc., as well as civil engineering and construction materials.

Various engineering plastics are used as high-performance resins, and among them, polysulfone is an amorphous thermoplastic resin with excellent mechanical and thermal properties. The development of various components was being carried out. Structural components refer to items that are difficult to mold using normal molding methods, such as thick plates, large-capacity components, and components with complex shapes.These components are generally assembled by assembling individual components and using an adhesive layer. For example, when manufacturing a thick plate, a plate of a thickness that can be molded is molded using a normal molding method such as injection molding or extrusion molding, and then laminated and bonded using an adhesive. It is like getting a plate of the desired thickness. By using parts and adhesives in this way, members with arbitrary structures can be manufactured.

Traditionally, structural members are made from polysulfone! ? ! To make it, parts made of polysulfone are heated, fused,
There have been methods of bonding, such as by ultrasonic fusion or by using a solvent that partially dissolves the material on the surface to be bonded.

It is impossible to join objects with complex shapes using heat fusion.
It was not possible to join thick materials using fusion bonding. Furthermore, bonding methods that use solvents have had problems such as deterioration of the interface due to residual solvent, such as cranking, reduction in adhesive strength, and changes in appearance.

Furthermore, methods using epoxy adhesives have also been attempted. Epoxy adhesives come in various types, such as solvent-free, room-temperature-curing, and heat-curing types, making the bonding method easier and making it possible to join thick objects and objects with complex shapes.However, in this case However, the strength after bonding was insufficient, and there were problems with water resistance, hot water resistance, etc., and it had not been put into practical use.

(Problems to be Solved by the Invention) An object of the present invention is to provide a new structural member whose main component is polysulfone, which is bonded using a new polyester adhesive.

(Means for Solving the Problems) In order to achieve the above object, the present inventors conducted various studies and as a result, completed the present invention.

That is, the structural member of the present invention is made of polysulfone bonded by an adhesive containing (i1) 5 to 25 parts by weight of polyisonoanate to (i) 1011 parts of a polyester resin having a number average molecular weight of 3000 to 20000. This is a new structural member whose main components are:

The polysulfone used in the present invention is obtained, for example, by a condensation reaction of an alkali ferulate group and an aromatic halogen group activated with an electron-withdrawing sulfone group in an aprotic scratching system. is a linear polymer represented by formula (i).

This polysulfone is described, for example, in US Pat. No. 4,108,837.
No. 4,175,175 and the like.

The polyester resin referred to in the present invention is a resin having a number average molecular weight of 3,000 to 20,000 obtained by a condensation reaction using an aromatic polycarboxylic acid or its lower alkyl ester, an aliphatic polycarboxylic acid, and a polyhydric alcohol as raw materials. It is.

In the present invention, the number average molecular weight refers to the result of measurement using gel permeability synchromatography as a polystyrene equivalent value. When the number average molecular weight is less than 3000, the flexibility of the adhesive is poor. When the number average molecular weight is greater than 20,000, the viscosity of the resin to be handled is high and the coating workability is poor, so that it cannot be used in the adhesive fixing method of the present invention.

The aromatic polycarboxylic acid or its lower alkyl ester may be a known one commonly used in conventional polyester resins, such as terephthalic acid, isophthalic acid, phthalic acid, phthalic anhydride, naphthalene dicarboxylic acid, trimellitic anhydride. Examples include acids or compounds esterified with lower alcohols such as methanol and ethanol, and one or more of these may be used in combination. Examples of the aliphatic polycarboxylic acids include compounds such as succinic acid, adipic acid, azelaic acid, and cepatic acid. Examples of polyhydric alcohols include ethylene glycol, propylene glycol, butanediol, bentanediol, hexanediol, neopentyl glycol, polyethylene glycol, polypropylene glycol, trimethylolpropane, trimethylolethane, glycerin, and pentaerythritol. ,
One or more of these may be used in combination.

A polyester obtained by copolymerizing the above acid component and a polyhydric alcohol can be used, but preferably acetone,
Ketone solvents such as methyl ethyl ketone and cyclohexanone, aromatic solvents such as toluene and quidylol, cellosolve solvents such as cellosolve acetate, ethyl cellosolve, and butyl cellosolve, trichlorethylene, and carbon tetrachloride. Alternatively, a polyester resin that is soluble in a mixed solvent is preferred.

To give a more specific example, isophthalic acid 20 to 40 mol χ,
Terephthalic acid 20-40 mol2, adipic acid 20-60
A polyester resin consisting of an acid component containing molar χ and a glycol component consisting of one or more of ethylene glycol, neopentyl glycol, hexanediol, trimethylolpropane, etc., or terephthalic acid 30~
Polyester consisting of an acid component containing 60 mol χ, 40 to 70 mol χ of succinic acid, adipic acid or sepathic acid, and a glycol component consisting of one or more types of ethylene glycol, neopentyl glycol, trimethylolpropane, etc. There are resins, etc.

The polyisocyanate referred to in the present invention includes various isocyanates such as 2.6-lylene diisocyanate, 2.4-)lylene diisocyanate, diphenylmethane-4,4-diisocyanate, and polymethylene polyphenyl polyisocyanate. Alternatively, a prepolymer reacted with an active hydrogen compound is used. Especially workability,
In terms of heat resistance and the like, diphenylmethane-4,4°-diisocyanate and polymethylene polyphenyl polyisocyanate are preferred.

The adhesive in the present invention has heat resistance, adhesive properties,
Although it has excellent flexibility, it can also be used to add silane cuffing agents, surfactants, antifoaming agents, etc. that are normally used in adhesives, flame-retardant inorganic fillers such as antimony trioxide, aluminum hydroxide, etc. Fillers such as silica and alumina can be mixed and used within a range that does not impede the effects of the present invention.

The novel structural component according to the invention can be produced by molding polysulfone using commonly known molding methods, such as compression molding, transfer molding, injection molding, etc.
Parts having arbitrary shapes are manufactured by extrusion molding or the like, two or more of these parts are assembled to form a desired structural member, and then bonded to each adhesive surface using an adhesive.

The above-mentioned adhesive is applied to the surface of each part to a thickness of 10 to 100μ, and then the adhesive surfaces are placed on top of each other, and a pressure of preferably 1.0 kg/- to 100 kg/- is applied to the surface for 10 minutes at room temperature. Keep it in this state for more than a minute, or even several days, or heat the glued item to 200℃ above 30℃.
It is also possible to maintain the temperature at 0.degree.

Parts made of polysulfone do not need to be polysulfone alone; in some cases, polysulfone may contain commonly known fillers such as inorganic powder, glass fiber, carbon fiber, potassium titanate fiber, etc., and new structural members. Depending on the intended use, some parts containing polysulfone as a main component may be supplemented with other materials, such as amorphous polymers with a glass transition point of 150°C or higher, such as polyarylate and polyetherimide. Components made of crystalline polymers having a glass transition point of 50° C. or higher, such as polyetheretherketone, polyphenylene sulfide, etc., may be used in combination.

〔Example〕

The present invention will be explained in more detail with reference to Examples below. In Examples and Comparative Examples, "parts" and "%" mean parts by weight and % by weight, respectively, unless otherwise specified.

Manufacturing example This example is an example of manufacturing polyester.

In a reactor equipped with a stirrer, condenser and thermometer, add 0.5 mol part of dimethyl terephthalate, 0.5 mol part of isophthalic acid, 0.3 mol part of adipic acid, and 0 mol of neopentyl glycol.
．． 5 mole parts, 0.3 mole parts of 196-hexanediol,
0.4 mole part of ethylene glycol, 0.1 mole part of trimethylolpropane, and 0.1 part of dibutyltin oxide were added to 100 parts of the above raw materials, and first 160 parts of
℃, then gradually raise the temperature to 160℃ to 260℃ to perform demethanol reaction and dehydration reaction to promote condensation. When the amount of dehydration becomes small, further condensation is performed under vacuum, and the number average Polyester resin 1 having a molecular weight of 518,000 was obtained. This polyester was dissolved in a mixture of toluene/cyclohexanone/cellosolve acetenide=70/20/10 and used.

Polyester was obtained using the resin composition shown in Table 1 in the same manner as Resin 1.

Examples 1 to 4 Using polysulfone resin tLDEL P-1700 (manufactured by UCC), an injection molding machine with a mold clamping cuff of 5 tons was used.
150 x 150 x 3+n+ at molding temperature 350℃
A flat plate was manufactured.

Mix each raw material at room temperature according to the formulation in Table 2 to prepare an adhesive, and apply a dry thickness of 15 mm to the overlapping surface of the flat plates.
Coated to a thickness of μ to 20μ, dried in an oven at 80°C for 5 minutes, then stacked 10 flat plates,
Bonding was carried out at 100° C. and a pressure of 10 kg/cj for 3 hours to obtain a structural member with a thickness of 30 mm. This structural member was immersed in hot water at 100° C. for 10 days, and changes in the adhesion state were observed.

The results are shown in Table 3.

Example-5 A mold clamping cuff 5 to
150X at a molding temperature of 380℃ by n injection molding machine
A flat plate of 150 x 3 m was manufactured.

This flat plate was glued in the same manner as in Example-1 to a thickness of 3
A structural member of 0 m+* was obtained. Changes in the situation after the hot water immersion test were observed in the same manner as in Example-1. The results are shown in Table 3.

Comparative Examples-1 to 3 Folysulfone resin UDEL P-1700 ([1(:C
150 x 150 x 3 m at a molding temperature of 350°C using a 5 ton injection molding machine with a mold clamping cuff.
A flat plate of s was manufactured.

The adhesive was prepared by mixing each raw material at room temperature according to the formulation in Table 2, and the thickness after drying was 15 mm on the stacked surface of the flat plate.
It was coated to a thickness of μ to 20 μ and dried in an open air at 80° C. for 5 minutes. Next, 10 sheets of flat Fi were laminated and bonded together at 100° C. under a pressure of 10 kg/ant for 3 hours to obtain a structural member with a thickness of 30 mm. This structural member is IOQ℃
The samples were immersed in hot water for 10 days to observe changes in adhesion.

The results are shown in Table 3.

(Effect of the invention) In addition to mechanical properties and thermal properties, the structural member according to the invention has
It also has a remarkable effect on hot water resistance, and its industrial use value is extremely large.'Table 2 θυ Umbrella hardness displayed Han Mitsui Toatsu Chemical AQ product name Effectiveness π = Blade ~ 31, 5 Polymethylene polyphenyl polyisocyanate type…March 1
Product name of Shobi σdo 0 Anti-W of tolylene diisocyanate and trimethylolpropane Effectively α = 11 ~ In, non-volatile content 75χ Procedural master's formal report) March 3, 1986

Claims (1)

Scope of Claims: The main component is polysulfone bonded with an adhesive comprising (i) 100 parts by weight of a polyester resin having a number average molecular weight of 3,000 to 20,000 and (ii) 5 to 25 parts by weight of polyisocyanate. new structural members.