Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
  • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes

Definitions

• REINFORCED LINEAR POLYESTER This invention is directed to an improved linear polyester composition in intimate admixture with an unsized fibrous reinforcing agent and a small amount of a hydrogen siloxane.
• sizing agents on the fibrous reinforce ⁇ ment or separately added must be absent because these either evoke adhesive bonds between the matrix and fiber, or they prevent reactions between the hydrogen poly ⁇ siloxane and the fiber, or both;
• the polysiloxane used must contain hydro- gen silicon bonds.
• thermoplastic compositions comprising per 100 parts by weight (a) , (b) and (c) , an intimate admixture of:
• R is hydrogen, C,-C, Q alkyl, phenyl or a mixture of any of the foregoing, and n plus m is at least 4, and, for example, up to about 200
• the linear polyesters (a) used in the practice of the present invention are polymeric glycol esters of terephthalic and isophthalic acids. They are available commercially or can be prepared by known techniques such as by the alcoholysis of esters of the phthalic acid with a glycol and subsequent polymerization, by heating glycols with the free acids or with halide derivatives thereof, and similar processes. These are described in U.S. Patent Nos. 2,465,319 and 3,047,539.
• glycol portion of the polyester can contain from two to ten carbon atoms, it is preferred that it contain from two to four carbon atoms in the form of linear methylene chains.
• Preferred polyesters will be of the family con ⁇ sisting of high molecular weight, polymeric glycol tere- phthalates or isophthalates having repeating units of the general formula:
• n is a whole number from two to four, and mixtures of such esters, including copolyesters of terephthalic and isophthalic acids.
• polyesters are poly(ethy ⁇ lene terephthalate) and poly(1,4-butylene terephthalate) .
• component (a) Conventional additives, such as anti-static agents, pigments, mold release agents, thermal stabilizers, and the like can be present in component (a) .
• the fibrous reinforcing agent (b) can vary widely in nature and type, so long as it is "pristine", that is, essentially free of any sizing materials, as mentioned above.
• the length of the filaments should be between about 50 mm and 6 mm, for long fibers and between about 6 mm and 0.05 mm in the case of short fibers.
• Alkali- free aluminum-boron-silicate glass (“E” glass) or alkali containing glass (“C” glass) can be used,as well as others.
• Preferred is a ground short glass fiber.
• any of the hydrogen polysiloxanes known in the art can serve as component .(c) .
• Especially useful are those those set forth by formula in U.S. 3,971,756.
• the patent also cites U.S. 2,445,794; 2,448,756; 2,484,595 and 3,514,424 as showing ways of making such siloxanes. To save unnecessarily detailed description, these are all incorporated herein.by reference.
• Most important members of the family are those in which R is methyl, or phenyl, or a mixture thereof. These are commercially available.
• poly(methyl hydrogen) siloxane a fluid which is available commercially from General Electric Company under the trade designation DF-1040.
• a small amount e.g., up to 10 parts by weight per 100 parts by weight of (a), (b) and (c) combined, of an impact modifier.
• This can compromise a polyacrylate, or a co- polymer of a diene and acrylonitrile and/or vinyl aromatic compound.
• a preferred such modifier is a block ' copolymer, of the linear or radial type, comprising diene rubber center blocks and vinyl aromatic terminal blocks.
• Illustrative dienes are butadiene or isoprene
• illustrative vinyl aromatics are styrene, vinyl toluene, and the like.
• Es ⁇ pecially suitable are selectively hydrogenated such com ⁇ pounds.
• Particularly valuable are the selectively hydro ⁇ genated linear ABA types, made from styrene (A) and buta- diene (B) , and sold by Shell Chemical under the tradename
• the fibrous reinforcing agent will be present in an amount of from about 15 to about 40 parts by weight per 100 parts by weight of (a) , (b) and (c) combined.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Reinforced Plastic Materials (AREA)

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• 1983
  • 1983-05-04 EP EP83901787A patent/EP0140887A1/de not_active Withdrawn
  • 1983-05-04 AU AU16009/83A patent/AU564533B2/en not_active Ceased
  • 1983-05-04 JP JP58501828A patent/JPS60501213A/ja active Pending
  • 1983-05-04 WO PCT/US1983/000636 patent/WO1984004316A1/en not_active Application Discontinuation

Non-Patent Citations (1)

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