KR20030011944A - Composition of none-drying sealant as adhesive having thermal and cold resistance - Google Patents

Abstract

PURPOSE: Provided is a non-dried sealant composition used also as an adhesive, which has heat-resistance, cold-resistance, and buffer action and prevents moisture permeation, gas permeation, and corrosion. CONSTITUTION: The sealant composition comprises 30-35wt% of a polyisobutylene base, 20-25wt% of polybutene as a plasticizer having similar properties to the polyisobutylene, 10-15wt% of a water-contained petroleum hydrocarbon resin as a heat-resistant adhesive, 10-15wt% of calcium carbonate as a filler preventing flowing, 5-10wt% of talc as a filler for keeping the shape, 3-5wt% of a carbon black as a coloring auxiliary, 3-5wt% of silica as a reinforcing agent substituted for the carbon black, and 0.3-0.7wt% of an anti-aging agent selected from pentaerythrityl-tetrakis£3-(3,5-di-t-butyl-4-hydroxypentyl)-propionate| or octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)-propionate.

Description

Composition of none-drying sealant as adhesive having thermal and cold resistance}

The present invention is watertight to prevent intrusion of moisture and dust by sealing, adhesion, bonding and filling between major structures or components in all industries such as civil engineering, construction, machinery, automobile, aviation, ship, electric, electronic, etc. The present invention provides a non-drying adhesive or an adhesive (hereinafter referred to as an adhesive) and a sealant composition that have heat resistance and cold resistance as well as airtightness, antirust and buffering effect.

Sealants, adhesives, bonding and filling adhesives and sealants used in major structures and components in all industries such as civil engineering, construction, machinery, automobiles, aerospace, ships, electricity and electronics are weak to heat and therefore flowable at high temperatures. Low) and at low temperature, the adhesiveness or adhesiveness (hereinafter referred to as adhesiveness) disappears or weakens and hardens easily, and the sealing part or adhesive part using the product generates cracks due to hardening. : Close contact with moisture to prevent moisture penetration) or airtight action (氣密: Close contact between air and gas to prevent penetration) or delamination of adhesive, sealing or filling areas There are drawbacks that can occur, and also the molding itself or molding of the filling or sealing material alone or the adhesive is avoided in the flexible core. In the high temperature, even when hagojyeo molded with sealing water or liquid filler, even if the low-temperature curability is strong and is difficult to mold even if molding to a predetermined shape is flowed down or cured at high temperature in a charged or sealing process, there was a hard-to-work defects.

The present invention as described above is a defect of the adhesive and sealant for sealing, adhesion, bonding and filling used in the main structure or components in all industries such as civil engineering, construction, machinery, automobile, aviation, ship, electricity, electronic, etc. It has excellent heat resistance and has low or no fluidity even at high temperature of up to 180 ℃, and maintains adhesiveness without hardening and adhesion. It has strong adhesiveness even at low temperature of -30 ℃, so it can be used in wide temperature range regardless of high and low temperature. There is no cracking or sticking out of the adhesive part and the molding processability is good, and it is made of various materials such as rubber, plastic, metal, etc. as well as molding for sealing and sealing using only self-adhesive and sealant composition, and strip or foam Molding of adhesive and sealing moldings formed by embedding cores of various shapes such as sheets, rubber and plastics Tapes, pads, sheets with various materials such as metals, etc., laminated on top or middle layers of restraining materials on sheets, films or foam sheets To provide a composition for an untouchable adhesive and sealant having excellent heat resistance and cold resistance while maintaining excellent adhesiveness without being dried and cured even at a high temperature and a low temperature even when the upper product is molded, and excellent in moldability and heat resistance. The explanation is as follows.

1 is an exemplary view of a molding for adhesion and sealing molded by using the composition of the present invention.

Figure 2 is an illustration of a molding for adhesion and sealing molded by embedding a variety of materials and cores of various forms in the composition of the present invention.

Figure 3 is an illustration of an example of laminating the restraining material of various forms of various materials on the upper surface of the sheet of the present invention composition.

Explanation of Major Codes in Drawings

1: Adhesive and sealing molding 2: Release paper

3: core material 4: restraint material

The present invention is moisture permeation to prevent the penetration of moisture and dust by sealing, adhesion, bonding and heavy warfare between major structures or components in all industries such as civil engineering, construction, machinery, automobile, aviation, ship, electricity, electronics, etc. Hardening or drying by heat or air while preventing (watertightness), gas penetration prevention (sealing), corrosion prevention (rustproofing), and mitigating shock (buffering). It relates to an undry adhesive and sealant composition having heat resistance and cold resistance,

20 to 25 wt% of a liquid polybutene, which is a pressure-sensitive adhesive and a plasticizer that gives viscosity and plasticity to the polyisobutylene (PIB) 30 to 35 wt% as its base material, and has similar physical properties thereto; Ethylene vinyl acetate (EVA), styrene isoprene styrene (SIS) copolymer, styrene ethylene butadiene styrene (SEBS) block copolymer, atactic polypropylene (APP) and amorphous poly alpha olefin (Amorphous Poly Alpha) 10 to 15 wt% of hydrogenated petroleum hydrocarbon resin, which is well known as a heat-resistant tackifier having excellent compatibility with Olefine and APAO); 10-15 wt% of calcium carbonate, which is a filler for preventing (flowing) and filling when the materials are mixed; 5-10 wt% of talc, which is a shape-keeping filler for preventing the shape of the molded product from being deformed; 3 to 5 wt% carbon black, which is a colorant and a reinforcing agent for imparting coloring and impact resistance; 3 to 5 wt% of silica, which is a substitute reinforcing agent as little as carbon black is used to prevent smearing of black pigment due to the large amount of carbon black used; And pentaerythryl-tetrakis [3- (3.5-di-thi-butyl-4-hydroxypentyl) -propionate] or octadecyl 3- (3.5-di-thi-butyl- It consists of adding 0.3-0.7 wt% of any one anti-aging agent selected from 4-hydroxy phenyl) -propionate.

The heat-resistant and cold-resistant pressure-sensitive adhesive and sealant composition of the present invention constituted as described above is made of polyisobutylene, which is solid as a substrate, and hydrogenated petroleum hydrocarbon resin, which is solid, as a heat-resistant tackifier. It is possible to obtain a pressure-sensitive adhesive and sealant, but since the polyisobutylene and the hydrogenated petroleum hydrocarbon resin, which are heat-resistant tackifiers, are solid, in order to make them usable fluid adhesives, organic solvents that dissolve them must be used. The solution dissolves the substrate and the tackifier to make a fluid adhesive, but since the organic solvent is volatilized by room temperature or heat, the adhesive is gradually cured even at room temperature and loses its function as an adhesive. Dry adhesive and sealant The polybutene, which is an undry adhesive plasticizer that provides plasticity while maintaining volatility while maintaining volatilization, is not volatilized even at room temperature or high temperature, and thus it is possible to improve fluidity by means of adhesive and plasticizer without using volatile organic solvents in the substrate and heat-resistant tackifier. Unlike other synthetic resin plasticizers such as dioctyl phthalate due to its compatibility with the base material while giving adhesiveness and non-volatility, it is completely fused without being precipitated and always has adhesiveness, heat resistance, and cold resistance. You will get a sealant.

The above-mentioned polyisobutylene is less than 30wt%, the adhesiveness and fluidity is lowered when added, and when it is added more than 35wt%, the adhesiveness is weak and easy to cure. At the time of the addition, the adhesiveness and heat resistance of the adhesive and sealant of the present application may be lowered, or the compatibility between the substrate and the tackifier may be weakened, thereby causing the delamination of the product.

In addition, the hydrogenated petroleum hydrocarbon resin, which is a heat-resistant tackifier, has a poor heat resistance when added below 10wt%, so that the product tends to be hardened because the product is hardened. There is a tendency that the moldability of the product is lowered and the circular shape of the product is difficult.

In addition, the filler calcium carbonate penetrates and mixes the base material, the plasticizer and the tackifier mixture to prevent excessive flow of the pressure sensitive adhesive product, thereby maintaining the original shape of the product. If you do, the flow preventing power is weak, and when more than 15wt% added, the adhesive force tends to be weak.

In addition, talc as a filler is to improve the flow preventing effect due to the calcium carbonate, but to improve the difficulty in maintaining a constant shape due to the weak formability when molding the sealant or filler with the present adhesive and sealant. The addition of phosphorous talc will have the effect of preventing deformation of the product.

However, when the talc is added below 5wt%, the deformation resistance of the product is weak, and when it is added above 10wt%, the product hardens.

As a reinforcing agent, carbon black serves to impart impact resistance while acting as a black pigment. However, when it is added below 3wt%, the coloring effect is small, and when it is added above 5wt%, it is difficult to complete and uniform coloring. There is a flaw in black pigment.

In order to compensate for the defect that carbon black, which is the above reinforcing agent, cannot be added in a predetermined amount, the silica black is added as a surrogate reinforcing agent to obtain the reinforcing effect, and the carbon black is not buried. Since only a large amount of carbon black needs to be added depending on the amount added, it is preferable to add 3 to 5wt% to match the surrogate amount of the carbon black.

The anti-aging agent is used to prevent aging of polyisobutylene, which is a substrate, or polybutene, which is a pressure-sensitive adhesive and a plasticizer, and the above-mentioned anti-aging agent is most suitable as an anti-aging agent of the present invention. Addition of 0.3wt% to 0.5wt% can control the curing and flow of the product while freezing the best anti-aging effect over the long term.

The composition of the present invention as described above is a main material of heat-resistant and cold-resistant adhesive and sealing moldings of various types having a function of watertight, airtight, rust-preventing and buffering action at -30 ℃ 180 It can be used in a wide range of temperature between ℃, some examples of use are as follows.

The product shown in Figure 1 is to attach the release paper (2) to the adhesive and sealing molding (1) made in the form of sheets or other forms using only the composition of the present invention itself, the molding is putty (putty) for filling voids inside and outside the building structure It is used as a sealing molding for rust prevention of door service hole cover film of automobiles, watertight pressure-sensitive molding between vehicle bodies and connection of civil structure.

Product shown in Figure 2 is a rubber, plastic, a variety of materials such as deceleration, such as strips (foam) in the form of a strip (foam) sheet (core) (3) embedded in the sealing molding (1) molded The release paper (2) is attached to the molding for sealing and sealing, and this molding is used as a backing sealant for filling between the building finishing material and the structure, and as a sealing molding for cushioning between the glass frame of the automobile and the vehicle body. do.

The product shown in Figure 3 is a sheet-like adhesive and sealing of the sheet, film, foam sheet restraint material (4) as a composition of the present invention as various materials such as rubber, plastic, metal, etc. Tape-shaped product laminated on top or middle layer of molded product (1), which is used for sealing tapes for protecting major parts such as machinery, automobiles, electrical and electronic products, automotive, aviation, and ship structures. Hole cover tape to block holes, sheets for internal soundproofing and dustproofing of electrical and electronic products, caulking tapes for connecting civil and sewage pipes, and antirust tapes for major machine parts -rust tape).

As described above, the composition for an undry adhesive and sealant having heat and cold resistance as described above is excellent in heat resistance and has low or no fluidity at high temperatures up to 180 ° C. It is strong and has no cracks or sticking out of sticking parts regardless of high and low temperature, and it has good molding processability, so it is easy to attach and detach by adhesiveness when gluing structures and parts. Even when molded into a filler, it is easy to seal or fill due to its excellent viscosity.

Claims (1)

It is used for major structures or components in all industries such as civil engineering, construction, machinery, automobile, aviation, ship, electricity, electronic, etc. As a pressure-sensitive adhesive and sealant composition having a heat resistance and cold resistance used for 20 to 25 wt% of a liquid polybutene, which is a pressure-sensitive adhesive and a plasticizer that gives viscosity and plasticity to the polyisobutylene (PIB) 30 to 35 wt% as its base material, and has similar physical properties thereto; Ethylene vinyl acetate (EVA), styrene isoprene styrene (SIS) copolymer, styrene ethylene butadiene styrene (SEBS) block copolymer, atactic polypropylene (APP) and amorphous poly alpha olefin (Amorphous Poly Alpha) 10 to 15 wt% of hydrogenated petroleum hydrocarbon resin, which is well known as a heat-resistant tackifier having excellent compatibility with Olefine and APAO); 10-15 wt% of calcium carbonate, which is a filler for preventing (flowing) and filling when the materials are mixed; 5-10 wt% of talc which is a shape-keeping filler for preventing the shape of the molded provision from being deformed; 3 to 5 wt% carbon black, which is a colorant and a reinforcing agent for imparting coloring and impact resistance; 3 to 5 wt% of silica, which is a substitute reinforcing agent as much as carbon black is used to prevent the black pigment from being buried according to the large amount of carbon black used; And pentaerythryl-teprakis [3- (3.5-di-thi-butyl-4-hydroxypentyl) -propionate] octadecyl 3- (3.5-di-thi-butyl-4 for the anti-aging of products. A heat- and cold-resistant pressure-sensitive adhesive and sealant composition comprising the addition of 0.3 to 0.7 wt% of an anti-aging agent selected from -hydroxy phenyl) -propionate.