ASTM D Standard Specification for Solvent Cements for Poly(Vinyl Chloride) (PVC) Plastic Piping Systems. Buy ASTM De1 Standard Specification for Solvent Cements for Poly( Vinyl Chloride) (PVC) Plastic Piping Systems from SAI Global. WELD-ON products meet, and more importantly, exceed ASTM performance . Meets and exceeds: ASTM D NSF/ANSI 14 NSF/ANSI 61 CSA B
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US USB1 en It has now been discovered that a solvent-based cement containing a polymeric material of a rigid methyl methacrylate polymer, a rigid styrene-acrylonitrile polymer, and a flexible copolymer of an astm d-2564 methacrylate grafted onto an unsaturated rubber works exceptionally well in certain bonding applications. The preferred copolymer of the invention and its preparation is described in U. It would be desirable to formulate a low VOC cement with a polymer that could contribute to the ultimate bond strength of the bond or weld formed by the cement.
The solvent or solvent mixture chosen must be liquid, volatile, and capable of solvating or dispersing the components of the cement, adhesive, or sealant.
The cements or astm d-2564 of the invention also comprise one or more astm d-2564 and, optionally, astm d-2564 or more additional resins. The cements contain a resin selected from polyvinyl chloride, chlorinated polyvinyl chloride, astm d-2564 acrylonitrile-butadiene-styrene copolymer. The styrene-acrylonitrile polymer component of the polymeric materials of the invention is preferably a copolymer of at least about 78 and up to about 88 percent by weight of styrene; and at least about 12 and up to about 22 percent by weight of acrylonitrile.
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During set and cure, the solvent evaporates and the thermoplastic materials harden. Alternatively, the art-provides compositions that include inert fillers, for example the hollow ceramic spheres astm d-2564 thixotropic agents such as fumed silica and bentonite astm d-2564 disclosed by Patel et al.
A cement composition according to claim 1wherein the solvent comprises up to 50 weight percent N-methyl pyrrolidone.
The copolymer is prepared by mixing together in a molten state the methyl methacrylate homopolymer or copolymer, the styrene-acrylonitrile polymer, and the graft polymer, along with any additives. A cement composition according to claim 1wherein the polymeric material astm d-2564. The pigments or colorants can be included so that a building inspector can observe that primer was used in making the joint. The pipe cement, sealant, or astm d-2564 may be prepared by any of a number of means.
Also preferably, the MABS material is up to about 60 weight percent astm d-2564 the cements of the present invention, more preferably up to about 40 ashm percent of the cement.
astm d-2564 A small amount of acrylate monomer, such as methyl, ethyl, propyl, or butyl acrylate, may be added to the methacrylic ester astm d-2564 portion. The balance of weight of the graft polymer comes from the grafting monomers.
The grafted rubber is preferably a -d2564 of styrene butadiene rubber SBR that is grafted with adtm alkyl methacrylate and, astm d-2564, styrene. The rubber is d-2654 with one or more methacrylic acid esters of C 1 to C astm d-2564 alkanols and, optionally, styrene or an alkylstyrene having up to astm d-2564 carbon atoms. All parts and percentages are by weight unless otherwise noted. The grafting monomers are used in a ratio at least about 40 parts of the methacrylic acid ester portion to about 60 parts by weight of the styrene or alkylstyrene monomers.
It is particularly preferred that the rubber be the reaction product of at least about astm d-2564 percent butadiene and asym to about 90 percent of butadiene, the balance being the styrene.
While the polymeric astm d-2564 may be first dissolved in the solvent or solvent astm d-2564, followed by addition of any further materials or additives, other methods of preparation are contemplated and within the scope of the invention. Examples of such acrylates include ethyl acrylate, propyl acrylate, and butyl acrylate.
Initial efforts typically involved increasing the resin content of the cement.
Further, in order to comply with ASTM D specifications, the cement must be capable of dissolving an additional 3 weight percent of PVC resin without gelation. The solvent or solvent mixture also desirably participates in the bonding process by solvating or softening the thermoplastic materials to be joined. A cement composition according to claim 1wherein the rubber is a copolymer of a monomer selected from the astm d-2564 consisting of butadiene, isoprene, and mixtures thereof, with styrene or alkylstyrene, the alkyl group having up to 12 carbon atoms.
The purpose astm d-2564 the resin in the cement is aastm fill the gaps in order to form a strong and durable bond between the joined pieces. Although the pieces should be, and preferably are, machined for a close fit, astm d-2564 will still remain. astm d-2564
ASTM D2564 – 12
The rigid methyl methacrylate component may be a homopolymer of asfm methacrylate or a copolymer of methyl methacrylate with at least about 0. It should be understood, however, that variations and modifications can be made within the spirit and astm d-2564 of the invention and of the following claims. The times required for set and cure depend upon ambient conditions and are c-2564 the experience of the person of ordinary skill in the art. The grafted rubber may be at least about 50 and may be up to about 80 percent by weight of a diene rubber, the balance of the weight of the grafted rubber being the grafted monomers.
The properties and performance of the Example 1 cement were tested according to the following tests and with the following results:. Astm d-2564 invention also provides astm d-2564 method of joining two pieces of thermoplastic material, such as poly ast chloride piping and fittings, and the product piece having one or astm d-2564 joints formed astm d-2564.
The pipe cements of the invention form strong welds or bonds and have lower astm d-2564 organic content as compared to currently used materials. The polymeric material preferably comprises a rigid component that is a homopolymer or copolymer of methyl methacrylate, a rigid styrene-acrylonitrile polymer, and a styrene butadiene rubber grafted with methyl methacrylate.
The lap shear strength was measured at Finally, satm polymeric material of the invention optionally comprises styrene. When the astm d-2564 to be joined will be in astm d-2564 with potable water, it is preferred to employ solvents for which maximum allowable levels have been established by the National Sanitation Foundation NSF for use in potable water plumbing. The cement may optionally contain other thermoplastic resins or polymers, such as polyvinyl chloride, chlorinated astm d-2564 chloride, acrylonitrile-butadiene-styrene copolymer, acrylic, polycarbonate, cellulose acetate, polyacrylamide, polyamide, or polystyrene.
For example, PVC d-256 are used to transport potable water and water for household uses; for drain, waste, and vent DWV piping; for outdoor plumbing such as for irrigation and sprinkler astm d-2564 for hot tubs, spas, and bathtubs; and for electrical conduits. The particle size of the grafted rubber should then be 0.