Claims
- 1. The method of preparing a masterbatch for blending with a polyester or polyamide based matrix resin to form a thermoplastic molding composition comprising reacting in a single step in the presence of a free radical initiator less than the full increment of the matrix resin, constituting from about 10 to about 80 percent by weight of the amount of matrix resin in the final composition, with a backbone rubber selected from the group consisting of a rubber component formed by interpolymerization of ethylene, one or more C.sub.3 -C.sub.16 mono-olefins, and a polyene, a copolymer rubber formed by the copolymerization of ethylene and one or more mono-olefins containing 3-16 carbon atoms, and mixtures thereof, and an ester of acrylic or methacrylic acid having an epoxide functionality, said ester being present in an amount within the range of 2-15 parts by weight per 100 parts by weight of said backbone rubber.
- 2. The method as claimed in claim 1, in which the rubber component is formed by the interpolymerization of ethylene, one or more C.sub.3 -C.sub.16 mono-olefins, and a polyene in which the ratio of ethylene to mono-olefin bound in the rubber component is within the range of 10-95 moles of ethylene to 90-5 moles of propylene.
- 3. The method as claimed in claim 2, in which the polyene is 5-ethylidene-2-norbornene present in an amount to provide up to 20 C.dbd.C groups per 1000 carbon atoms.
- 4. The method as claimed in claim 1, in which the copolymer rubber is a copolymer of ethylene and propylene bound in the rubber in the ratio of 10-95 moles ethylene to 90-5 moles propylene.
- 5. The method as claimed in claim 1, in which the ester of methacrylic acid is glycidyl methacrylate present in an amount within the range of 2-15 parts by weight per 100 parts by weight of the backbone rubber.
- 6. The method as claimed in claim 1, in which the reaction is carried out at an elevated temperature within the range of 350-550.degree. F. in the presence of a peroxide catalyst.
- 7. The method as claimed in claim 6, in which the catalyst is present in an amount within the range of about 0.3-3.0 parts by weight per 100 parts by weight of the rubber.
- 8. The method as claimed in claim 1, in which the masterbatch contains 50-80 parts by weight backbone rubber to 50-20 parts by weight polyester resin.
- 9. A masterbatch produced by the method of claim 1.
- 10. A masterbatch produced by the method of claim 7.
Parent Case Info
This is a division of co-pending application Ser. No. 235,315, filed on Aug. 23, 1988, now abandoned,
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
Country |
8540154 |
Mar 1985 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
235315 |
Aug 1988 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
4090 |
Jan 1987 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
183437 |
Apr 1988 |
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