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New primer development in the bonding of polyolefins announced
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New primer development in the bonding of polyolefins announced With the launch of their new polyolefin primer, Loctite UK claim that bonding of low energy substrates with cyanoacrylate adhesives is now possible. Following a 2-year development at their Tallaght Laboratories near Dublin, Ireland, the solvent-based surface treatment which, say the manufacturers, allows cyanoacrylate adhesives to bond most polyolefins including polyethylene, polypropylene, butyl rubber, PTFE and thermoplastic rubbers such as Santoprene to themselves, to each other or to other materials, is now available. According to Loctite the primer was developed because of the need for a practical method of bonding polyolefins and related low energy substrates. With the primer, usual methods of surface preparation such as flame or plasma treatment, corona discharge or oxidative chemical methods are not required, although a clean grease-free surface achieves better results. The primer is simply applied to the bond area of the polyolefin substrate, drying within seconds. It is only the bond area of the low energy substrate which should be primed; use on hard rubbers or plastics can
weaken the final bond. Once bonded, say Loctite, operational strength is usually obtained within 30 seconds. With the low viscosity of the product, application can be by brush, spray or by dipping. Although the primer is colourless, and will not stain plastics or rubber, visual inspection of the joint to check that the primer has been applied is possible. The primer Contains a fluorescent additive which is visible when exposed to a UV lamp. The Research and Development Centre at Tallaght where the primer was developed, is one of three established by the Loctite Corporation close to its international markets, the other two being in the USA, at Newington, Connecticut and Cleveland, Ohio. Since inception, the R ~ D centre has continuously refined and developed Loctite engineering adhesives; work which has resulted in today's multi-substrate cyanoacrylate adhesives, oil-tolerant one-component anaerobic engineering adhesives, and acrylic structural adhesives. The centre has 14 laboratories including analytical chemistry, materials evaluation and testing, product development.
Loctite expect the primer to enable low cost polyolefinic plastics to be substituted for more expensive materials. For further information contact: Loctite UI( A division of Loctite Holdings Ltd, Watchmead, Welwyn Garden City, Hertfordshire, AL 7 1JB, UK
Video to promote adhesive use In an effort to improve the awareness of engineers to the wide range of adhesives available the Institute of Mechanical Engineers (IMechE), UK, has commissioned an educational video from communications specialists, the AVC Group. Concerned that many engineers do not consider adhesive bonding as an alternative to rivetting, the IMechE, the Department of Trade and Industry (DTI) and major adhesives manufacturers together funded the film, which provides an overview of today's adhesives and explains what a precise science it has become. A number of case studies are considered, including the manufacture of helicopter blades. For more details contact: AVC Group Ltd, Waiters Farm Road, Tonbridge, Kent TN9 IQR, UI~
European market for polyurethane chemicals and product to be studied IAL Consultants plan to undertake a study of the European Market for polyurethane chemicals and products. According to IAL, the already large European market of 1.35 million tonnes per year is expected to grow 2 - 3 % per year at least until 1995. There will, however, be considerable variation in growth rates across a complex range of end-use sectors. Growth rates for polyurethane elastomers, adhesives, coatings and sealants are expected to be significantly above the average for polyurethanes as a whole. The range of products includes reactive coatings,
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non-solvent based adhesives, in-mould surface coatings, insulated glass, construction sealants and adhesive/sealant systems for automotive glass encapsulation (direct glazing). As the report will be in modular form, subscribers will be able to purchase either the complete study or specific sections. The full report, which will cost £ 6 0 0 0 , will be available not later than the end of October 1989. Full details can be obtained from IAL Consultants Limited, 14 Buckingham Palace Road, London S W l W OQP, UK,
INT.J.ADHESION AND ADHESIVES JULY 1989
The latest addition to Ultra-Violet Products' Ltd, UK, range of curing equipment, the Flexicure. This is used for fast curing of UV-sensitive adhesives, primarily for component bonding, sealing and protection. Radiation is directed to the required site and concentrates all the energy at one point. Paul EIIwood, UVP Ltd, Science Park, Milton Road, Cambridge, CB4 4FH, UK.
oduc
New primer development in the bonding of polyolefins announced With the launch of their new polyolefin primer, Loctite UK claim that bonding of low energy substrates with cyanoacrylate adhesives is now possible. Following a 2-year development at their Tallaght Laboratories near Dublin, Ireland, the solvent-based surface treatment which, say the manufacturers, allows cyanoacrylate adhesives to bond most polyolefins including polyethylene, polypropylene, butyl rubber, PTFE and thermoplastic rubbers such as Santoprene to themselves, to each other or to other materials, is now available. According to Loctite the primer was developed because of the need for a practical method of bonding polyolefins and related low energy substrates. With the primer, usual methods of surface preparation such as flame or plasma treatment, corona discharge or oxidative chemical methods are not required, although a clean grease-free surface achieves better results. The primer is simply applied to the bond area of the polyolefin substrate, drying within seconds. It is only the bond area of the low energy substrate which should be primed; use on hard rubbers or plastics can
weaken the final bond. Once bonded, say Loctite, operational strength is usually obtained within 30 seconds. With the low viscosity of the product, application can be by brush, spray or by dipping. Although the primer is colourless, and will not stain plastics or rubber, visual inspection of the joint to check that the primer has been applied is possible. The primer Contains a fluorescent additive which is visible when exposed to a UV lamp. The Research and Development Centre at Tallaght where the primer was developed, is one of three established by the Loctite Corporation close to its international markets, the other two being in the USA, at Newington, Connecticut and Cleveland, Ohio. Since inception, the R ~ D centre has continuously refined and developed Loctite engineering adhesives; work which has resulted in today's multi-substrate cyanoacrylate adhesives, oil-tolerant one-component anaerobic engineering adhesives, and acrylic structural adhesives. The centre has 14 laboratories including analytical chemistry, materials evaluation and testing, product development.
Loctite expect the primer to enable low cost polyolefinic plastics to be substituted for more expensive materials. For further information contact: Loctite UI( A division of Loctite Holdings Ltd, Watchmead, Welwyn Garden City, Hertfordshire, AL 7 1JB, UK
Video to promote adhesive use In an effort to improve the awareness of engineers to the wide range of adhesives available the Institute of Mechanical Engineers (IMechE), UK, has commissioned an educational video from communications specialists, the AVC Group. Concerned that many engineers do not consider adhesive bonding as an alternative to rivetting, the IMechE, the Department of Trade and Industry (DTI) and major adhesives manufacturers together funded the film, which provides an overview of today's adhesives and explains what a precise science it has become. A number of case studies are considered, including the manufacture of helicopter blades. For more details contact: AVC Group Ltd, Waiters Farm Road, Tonbridge, Kent TN9 IQR, UI~
European market for polyurethane chemicals and product to be studied IAL Consultants plan to undertake a study of the European Market for polyurethane chemicals and products. According to IAL, the already large European market of 1.35 million tonnes per year is expected to grow 2 - 3 % per year at least until 1995. There will, however, be considerable variation in growth rates across a complex range of end-use sectors. Growth rates for polyurethane elastomers, adhesives, coatings and sealants are expected to be significantly above the average for polyurethanes as a whole. The range of products includes reactive coatings,
120
non-solvent based adhesives, in-mould surface coatings, insulated glass, construction sealants and adhesive/sealant systems for automotive glass encapsulation (direct glazing). As the report will be in modular form, subscribers will be able to purchase either the complete study or specific sections. The full report, which will cost £ 6 0 0 0 , will be available not later than the end of October 1989. Full details can be obtained from IAL Consultants Limited, 14 Buckingham Palace Road, London S W l W OQP, UK,
INT.J.ADHESION AND ADHESIVES JULY 1989
The latest addition to Ultra-Violet Products' Ltd, UK, range of curing equipment, the Flexicure. This is used for fast curing of UV-sensitive adhesives, primarily for component bonding, sealing and protection. Radiation is directed to the required site and concentrates all the energy at one point. Paul EIIwood, UVP Ltd, Science Park, Milton Road, Cambridge, CB4 4FH, UK.