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.
• 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
• 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.
• 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.
• yield strength and elongation at yield and at break can be measured according to standard test methods.
• compositions used, and the properties ob ⁇ served are set forth in Table 1:
• compositions (parts by weight) A B
• the poly (ethylene terephthalate) can be substituted with poly(1,4- butylene terephthalate).
• the pol ( ethylhydrogen) siloxane can be substituted with a poly(phenylhydrogen) siloxane,
• OMPI OMPI
• An impact improving amount e.g., 5% by weight of a selectively hydrogen ⁇ ated block copolymer of styrene-butadiene-styrene, e.g., Shell's Kraton G, can be included in the composi ⁇ tion. All such obvious variations are within the full intended scope of the appended claims.

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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)

Priority Applications (4)

Applications Claiming Priority (1)

Publications (1)

Family

ID=22175071

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (1)

Citations (2)

• 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

Patent Citations (2)

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