Graft polymers for use in engineering thermoplastic blends

• US 5,244,971 A
• Filed: 07/22/1991
• Issued: 09/14/1993
• Est. Priority Date: 07/22/1991
• Status: Expired due to Fees

• Current Assignee: Exxon Chemical Patents Inc. (Exxon Mobil Corporation)
• Original Assignee: Exxon Chemical Patents Inc. (Exxon Mobil Corporation)
• Inventors: Jean-Marc, Dekoninck
• Primary Examiner(s): Kight, III, John
• Assistant Examiner(s): Johnson, Rachel
• Application Number:
  US07/733,499
• Time in Patent Office: 785 Days
• Field of Search: 525/64, 525/66, 525/67, 525/68, 525/69, 525/71, 525/72, 525/74
• US Class Current: 525/64
• CPC Class Codes: C08G 81/02 at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
• CPC Class Codes: C08L 101/00 Compositions of unspecified macromolecular compounds
• CPC Class Codes: C08L 25/12 with unsaturated nitriles
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 33/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C08L 35/06 Copolymers with vinyl aromatic monomers
• CPC Class Codes: C08L 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates

Abstract

Graft polymers for use as compatibilizers and/or modifiers for engineering thermoplastic compositions are provided comprising the reaction product of functionalized thermoplastic polymers with styrene-maleic anhydride copolymer. The functionalized thermoplastic polymers are based typically on polyolefin polymers and contain at least one functional group reactive either with styrene-maleic anhydride copolymer, or with direactive linking groups reactive with both of the functionalized thermoplastic polymer and styrene-maleic anhydride copolymer. The engineering thermoplastic compositions to be modified include polar engineering thermoplastics and the non-polar engineering thermoplastics based on styrene.

Claims

1. An engineering thermoplastic composition, said composition excluding those comprising 50 wt % or greater styrene maleic anhydride copolymer as the engineering thermoplastic, comprising :

(a) 5-95 wt % engineering thermoplastic at least partially compatible with styrene maleic anhydride copolymer ;

(b) 0-95 wt % thermoplastic polymer ; and

,

(c) 2-50 wt % graft polymer comprising the reaction product of a functionalized thermoplastic polymer with styrene maleic anhydride copolymer.

2. The composition according to claim 1 wherein said engineering thermoplastic polymer is selected from the group consisting of:

aliphatic or aromatic polycarbonates, polyesters, polyamides, styrene polymers, polyacetal, polyphenylene ether, acrylic ester polymers, methacrylic ester polymers, vinyl chloride polymers, vinylidene chloride polymers, vinyl fluoride polymers, and vinylidene fluoride polymers and mixtures thereof.

3. The composition according to claim 1 wherein said engineering thermoplastic composition comprises 5-50 wt % engineering thermoplastic, 50-95 wt % thermoplastic polymer and 2-25 wt % graft copolymer.

4. The composition according to claim 1 wherein said engineering thermoplastic composition comprises 50-95 wt % engineering thermoplastic, 0-40 wt % thermoplastic and 2-50 wt % graft polymer.

5. The composition according to claim 3 or 4 wherein said functionalized thermoplastic is at least partially compatible with said thermoplastic.

6. The composition according to claim 5 wherein said thermoplastic polymer is polypropylene and said functionalized thermoplastic polymer is polypropylene grafted with carboxylic acid group containing monomers.

7. The composition according to claim 4 wherein said functionalized thermoplastic comprises functionalized ethylene alpha-olefin elastomer and said thermoplastic comprises at least one member of group consisting of ethylene-alpha-olefin elastomer, polyethylene copolymer and ethylene-propylene copolymer.