standardized .10 N KOH in ethyl alcohol. hot air circulating oven for 10 minutes to allow the powder to fuse and flow out. Adhesive Lamination and Heat Sealable Coatings Polyolefins are widely used in the packaging industry as coatings on polymer films and aluminum foil. KOH x N)(ml. The fused powder coating passes the cross-hatched cellophane tape adhesion test and the 1/8-inch conical mandrel bend flexlbility test. . 1. . It has a Gardner impact strength (in. The c~rbo~ylated polyolefins contaln small amounts of unsaturated dicarboxylic component, ~ith or wlthout minor amounts of other unsaturated acld materials, whlch are grafted onto normally solid polyoleflns. ~' _ 7 _ 7~ This invention will be further illustrated by the ~ollowing examples although it will be understood that these examples are included merely for purposes of illus-tration and are not intended to limi-t the scope of the invention.EXAMPLE 1 - Preparation of Carboxylated Polypropylene by Reaction by a Solution Process of p-Xylene _ The reaction apparatus consists of a 5-liter, 3-necked flask fitted with a mechanical stirrer, a water con-denser, and a dropping funnel. as a coupling agent in polymer composites, involves reacting polypropylene with maleic anhydride and peroxide initiator at elevated temperature in the solid state, Polymeric coating mixture, method for applying this coating mixture to a metallic base for protecting an edge or a part, protective layer, a base coated in this manner and the use thereof, Polyolefin compositions comprising bio-based starch materials, Easy-open container and container coating, Highly abrasion-resistant polyolefin pipe, Highly abrasion-resistant grafted polyolefin pipe, Process for preparing free flowing epdm particles, Method to form an aqueous dispersion of an ionomer-polyolefin blend, High-adhesion polyethylene powder coating, Aluminum article covered by maleic anhydride modification polymers, Polymer oxidation process and emulsion therefrom, Modification of crystalline propylene polymers, Reaction products of unsaturated dicarboxylic acids,anhydrides,esters with degraded poly - alpha - olefin polymers, Aqueous dispersion for coating and coated articles, Process for the grafting of monomers onto polyolefins, Method of obtaining polymeric coating on metal substrate, Modified chlorinated polyolefins, aqueous dispersions thereof and their use in coating compositions, Adhesive blends and composite structures comprising acid or anhydride modified PE + hope + polypropylene, Cross-linkable hot-melt adhesive and method of producing same, Solid coating composition for textile floor coverings, Precross-linked silicone elastomer particles with organopolymer shell as formulation constituent in powder coating materials, Blends containing polyethylene and an unsaturated polycarboxylic acid modified polyolefin, Coating compositions containing a polyoxide and process for preparing this, Filler-containing polypropylene resin composition and process for producing the same, Crosslinkable polymer powder and laminate, Thermosetting powder coating compositions containing flow modifiers, Concentrates suitable for the preparation of functionalized polyolefins and functionalization, Polypropylene resin composition containing filler, Chlorine-free and reduced chlorine content polymer and resin compositions for plastic bonding, Water-based one-pack-type coating composition and coated article, Uv curable non-chlorine adhesion improvers, Adhesion promoter compositions for polyolefin substrates, Water-based paint composition and coated article thereof, Coating composition for polyolefin resin and process for producing the same, Process for preparing finely divided polymers. Powder (80/20 (front/reverse).The fused powder coating of unmodified high density polyethylene (melt index 32) has poor appearance, poor ad-hesion (failed crosshatched cellophane tape test), poor : .flexibility (failed conical mandrel test) and poor impact resistance [Gardner impact strength of ~10/~10 (front/-reverse)]. The Yext Knowledge Tags are successfully installed and will be added to the website. The powder obtained by grinding ; is sieved for 1 hour to obtain the portion that is <140 mesh in size.The <140 mesh powder is electrostatically sprayed, using a Gema AG Electrostatic Powder Spray ~pparatus at a potential of 60 kv., onto unprimed bonderized steel test panels. Maleic anhydri~e (1% based on polymer) is grafted . The global polyolefin powder market is highly fragmented and the major players have used various strategies like new product launches, agreements, expansions, joint ventures, partnerships, acquisitions, and others to increase their footprints in this market. to remove traces of maleic anhydride. Contents. . The powder obtained is then sieved and the portion which passes through a 15Q mesh screen is electrostatically sprayed onto unprimed bonderized steel test panels. In addition to the powder feed air, there is an atomizer which mixes additional air into the powder being conveyed through the hoses and aids in a consistent flow. For example, it has no cratering or orange peel, passes the cross hatched cellophane tape adhesion test, -~ .passes the 1/8-inch conical mandrel bend test, and has a Gardner impact strength of >80/40 in. The shop is the expert and must steer the … .. . The composition comprises a particulate form of a high molecular weight carboxylated polyolefin selected from the group consisting of homopolymers prepared from alpha-olefin monomers containing 3 to 12 carbon atoms; copolymers of such monomers with each other; copolymers of such monomers and ethylene; and poly-ethylene, having a saponification number of about 2 to about 12 and a particle size of less than 20 mesh.In accordance with a further embodiment of -the present teachings, a substrate is provided having thereon an electrostatically deposited coating which comprises a particulate form of less than 20 mesh size of a carboxylated polyolefin which has a saponification number of about 2 to '~ about 12 and has either a melt flow of from about 15 to about 175 g/10 minutes at 230C or a melt index of 5 to 75 at l90~C. Polyolefin powder coatings are widely used for their low cost and ease of application. The main type of pumps used today for powder coatings are Venturi pumps, and pumps are sort of like the heart of your equipment. KOH x N)(ml. Combine … Silicon-Based Powders 3. The fused powc1er coating of unmodi~ied low-density polyethylene (Tenite 1917 polyethylene; melt index 30) has both a poor surface appearance and poor adhesion (~ailed crosshatched cellophane tape test). The graft copolymer may preferably be stabilized ' ,:, against thermal, oxida-tive and ultraviolet radiation de- -gradation by addltion of various polyolefin stabilizers such as, for example: dilauryl thiodipropionate; 2,6-dioctadecyl-p-cresol; 4,~'-butylidene bis(6-t-butyl-m-cresol); ~-dodecyl-oxy-2-hydroxybenzophenone; pentaerythxitol tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)-propionate~; dioctadecyl 3,5-di-t-butyl-4-hydroxybenzyl phosphonate; 4,4'-methylene bis(2,6-di-t-butylphenol); 2-(3,5-di-t-amyl-2-hyclroxyphen~l)benzo-triazole and combinations thereof. The coating may also be quenched to further improve its gloss.In preparing the graft copolymers, the polypropylene which can be in pellet or powder form may be coated with the desired amount of unsaturated dicarboxylic acid component con-taining generally about 0.02-0.2% by weight, based on polymer weiyht/ of dissolved free-radical initiator. Remove from heat, add 5 ml.wa~er, and titrate to a faint pink end point with .10 M KOH in ethyl alcohol.Run a blan~ ln this manner using the same amounts of reagents and the same ; heating times. The coated panels .,; . Email with any questions you may have regarding this website, or anything associated with it. EXAMPLE 4 - Unmodified Polypro_ylene Controls Unmodified polypropylene stabilized with 0.2~~' DLTDP and 0.2~ DOPC and having a melt flow rate of 4.5 and conditioned density of 0.912 is cryogenically ground according to the grinding procedure described in Example 2. Moreover, rising masterbatch for the paints and coatings, cosmetics& personal care industries are significantly driving the global polyolefin powder market during the foreseen trajectory. as determined by AS~M D-1238 of from about 0.1 ~, to about 60Ø Representative technology for preparing such .polypropylene is found, for example, in the disclosures of U.S. of 0.68, and a saponification number of 11.4 (1% combined maleic anhydride). potable water, raw water, …) at operating temperature up to 50 °C; or - conveying waste water at … The coated panels have a poor appearance (s-treaked surface) and the coatings have poor flexibility (polymer coating ruptures and peels away from metal at the bend in the conical mandrel bend test), poor adhesion (polymer adheres to cellophane tape and pulls away from the metal in the crosshatched ``cellophane tape test), and poor impact strength (Gardner impact strength of 30 and <10 in. EXAMPLE 5 - Pre aration of Carboxylated PolYethylene in a p Solution Process in p-Xylene Polyethylene having a melt index of 30 g./10 190C., an IoV~ of 0.67; and a density of 0.925, is maleated in p-xylene using maleic anhydride (5% based on polyethylene) and 2,5-dimethyl-2,5-di(t-butyl peroxy)hexane ; 20 (0.73% based on polyethylene) using the procedure described in Example 1. Both types of powder coating provide excellent wear resistance and outdoor durability. This coating passes the ` crosshatched cellophane tape test and has a Gardner impact ` strength of ~80/20 in. The reaction mixture (partially gel) is then poured into 4000 ml. 3. In one specific aspect, this lnventLon relates to a powder coatlnz c:ompositlon of a carboxylated polyolefin. at 200C. Unique wax additives are available to protect a high gloss powder coating surface from abrasion damage … On the basis of their polymer nature both powder coatings can be included in the same group, although they differ considerably in their performance. Powder coatings present unique challenges to the formulator that require innovative wax additives to meet those requirements. 4. These carboxylated poly-olefins are relatively high melt flow rate (hereinafter M.F.) These compositions also provide good protective coatings for pre-venting rusting of steel members or structures. ~ ;The dried, maleated polypropylene is ground with liquid nitrogen in a Wiley mill using a 0.5-mm. Typical useful pigments include titan-ium dioxide (Ti-Pure R100), calcium carbonate, -talc, Zulu Blue 4849 (Harshaw Chemical Co.), Ultramarine Blue C.I. It has a pencil hardness of less than 6B, passes the crosshatched cellophane tape test, passes the 1/8-inch conical mandrel bend test, and has a Gardner impact strength . Pune, Maharashtra, Jun. When cryogen:ically ground to less than about 20 mesh size powder, these carboxylated materials can be conveniently coated on substrates using a fluidized bedcoating process and, when ground to less than about 100 mesh size powder, can be electrostatically spray coated onto substrates such as metal panels including un primed steel or alumin~, and other such suitable chargeable substrates. After addition of the peroxide ;j 20 solution, the reaction mixture is allowed to reflux for 1 -hour. This reaction mixture is heated to reflux, approximately 140C. No.1290 (Hartman-Leddon Co.), Monastral Red B-742D ~Du Pont), Monastral Green 710D (Du Pont), carbon black and the likeO It is frequently desirable to prepare masterbatches of graft copolymer containing high concentrations, such as 30 to 60%by weight based on total masterbatch composition of pigment, ~-~ filler or the like and then mix the masterbatch with additional graft copolymer in a subsequent operation to provide desired pigment or filler levels, generally 2 to 30%by ~eight based on total, final composition. excess CH3COOH. ~, . , and has a conditioned density as determined by ASTM D-1505 - of at least about 0.90 up to about 0.93 and a melt flow rate ~M.F.) Powder coating suppliers understand powder coating chemistry limitations and performance expectations. coating producing polyolefine substrate polyolefine substrate Prior art date 1984-03-07 Legal status (The legal status is an assumption and is not a legal conclusion. Preferably, about 1 to 15~ of the unsaturated poly- - !~0 carboxylic component, such as unsaturated polycarboxylic acids, anhydrides ~ -or esters thereof, based on ~he weight of the polyolefin, is used in preparing the carboxylated polyolefin used in the invent:Lon.