Polyolfins, methods of making polyolefins and related plastic additive compositions
OwnerSonya Wolters, Kemper Lake +3inventors
InventorsSonya Wolters, Kemper Lake, Bhavesh Gandhi, Jiang Li, Jiannong Xu
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Abstract
A thermoplastic is disclosed providing: a polyolefin, a nucleating agent, and stearate-containing compounds having fatty acid anionic portions selected from calcium, zinc, sodium, lithium, aluminum, and magnesium. In some applications, calcium stearate and zinc stearate may be combined synergistically in such a thermoplastic. The nucleating agent may be of many forms, including for example a dicarboxylate salt, such as a metal salt of bicyclic[2.2.1]heptane dicarboxylate salt, as one example.
Claims22
A thermoplastic composition comprising:
- (a) a polyolefin,
- (b) a nucleating agent having the structure:
- wherein X and Y are independently:
- C1-18 alkylene, C2-18 alkenylene, C3-18 cycloalkylene, C4-18 cycloalkenylene, or arylene;
- R1 and R2 are independently —H, C1-18 alkyl, or —COR5;
- R3 and R4 together form A-B-C, wherein A and C are independently C═O, —O—, —CR6R7-, or —CR6-;
- and
- B is a single or double bond, or when neither A nor C is —O—, B can be —O—;
- R5 is —OH, —O—C1-18 alkyl, —O-aryl, or —NRR′;
- each R6 and R7 is independently —H, halogen, C1-18 alkyl, C3-18 cycloalkyl, —COR5, —CRR′—COR5, or —NRR′;
- Each R and R′ is independently —H, C1-18 alkyl, C3-18 cycloalkyl, or C1-18 alkyl substituted by one or more —OH, halogen, —COOH, COOC1-18 alkyl, C1-18 alkylene-S-C1-18 alkyl, aryl, or substituted aryl groups, or a salt thereof;
- (c) a first fatty acid salt having a first cationic counter ion, said first cationic counter ion being selected from the group consisting of:
- calcium, sodium, lithium, and barium;
- and
- (d) a second fatty acid salt having a second cationic counter ion, said second cationic counter ion being selected from the group consisting of:
- magnesium, aluminum, and zinc.
A thermoplastic composition comprising:
- (a) a polyolefin,
- (b) a nucleating agent, said nucleating agent comprising a dicarboxylate salt compound;
- (c) a first fatty acid salt having a first cationic counter ion, said first cationic counter ion being selected from the group consisting of:
- calcium, sodium, lithium, and barium;
- (d) a second fatty acid salt having a second cationic counter ion, said second cationic counter ion being selected from the group consisting of:
- magnesium, aluminum, and zinc.
A thermoplastic composition comprising:
- (a) polypropylene;
- (b) a nucleating agent;
- (c) calcium stearate;
- and
- (d) zinc stearate.
A method of forming a clarified polyolefin, said method comprising the steps of:
- (a) providing a polyolefin,
- (b) providing a nucleating agent, said nucleating agent comprising a derivative of a dicarboxylate salt compound;
- (c) providing a first fatty acid salt having a first cationic counter ion, said first cationic counter ion being selected from the group consisting of:
- calcium, sodium, lithium, and barium;
- (d) providing a second fatty acid salt having a second cationic counter ion, said second cationic counter ion being selected from the group consisting of:
- magnesium, aluminum, and zinc;
- (e) melt compounding (a), (b), (c), and (d) to form a clarified polyolefin.
Dependencies are inferred from the claim text.