Applying chemistry and technology for the manufacture of plywood adhesives is at the forefront of RI Chemical Corporation.
Products Description
For interior and exterior paints, matte, gloss and semi-gloss finishes. Emulsions are either homopolymers or copolymers of vinyl acetate, styrene, or acrylic monomers produced by a process known as “emulsion polymerization”. They are made up of 45-55% by weight of polymers dispersed in water and are the bases of water-based coatings or latex paints. Latex paints are widely used for concrete surfaces because of their good alkali and water resistance and excellent outdoor durability. In addition, they have won acceptance being water-based. Film-formation of water-based coatings begins when water evaporates, bringing the resin particles into close contact with one another. Inner-particle forces cause fusion of the individual particle entrapping any pigment and plasticizer thay may have been present in the water phase, thus, producing a continuous film.
For woodworking and packaging. Hot melts are a new breed of adhesives with fast curing properties which make them suitable for use with high speed machines. Conventional adhesives are unsuitable for automatic operations due to the difficulty of bonding or long set time. Hot melts have a wide range of applications, such as automatic packaging, book binding, wood binding, etc.
Urea, phenol and melamine formaldehyde adhesives for the manufacture of plywood. Plywood adhesives are synthetic glues made from chemical raw materials through condensation polymerizatiton. The glues used are thermosetting types which cure or harden by the action of heat or a catalyst. Urea-formaldehyde (UF) and phenol-formaldehyde (PF) resins are two common types of plywood adhesives. UF resins are used for the manufacture of interior grade plywood while PF resins are for exterior and marine-grade plywood. A catalyst or hardener is added to the UF resins to accelerate curing or hardening. PF resins, on the other hand, can be made to cure and harden under heat with or without a catalyst.