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US 12,583,979 B2Granted
Coupled post-consumer recycled polypropylene and process to provide same
AssigneeDow Global Technologies LLC
InventorOlaf Henschke
Life of this patent
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Abstract
The present disclosure provides a process. The process includes (i) providing a post-consumer recycled polypropylene (PCR-PP) having a melt flow rate (MFR I2) equal to, or greater than, 7.0 g/10 min; (ii) adding a 4,4′-oxydibenzenesulfonyl azide (DPO-BSA) to the PCR-PP; (iii) melt blending the PCR-PP with the DPO-BSA; and (iv) forming a DPO-BSA coupled PCR-PP having a melt flow rate (MFR I2) equal to, or less than, 5 g/10 min.
Claims15
A process comprising:
- (i) providing a post-consumer recycled polypropylene (PCR-PP) void of virgin polypropylene and having a melt flow rate (MFR I2) equal to, or greater than, 7.0 g/10 min, and a property selected from the group consisting of (i) a MFR I10/I2 from 12 to 35, (ii) at least two melting points, and (iii) combinations thereof;
- (ii) adding a 4,4′-oxydibenzenesulfonyl azide (DPO-BSA) to the PCR-PP;
- (iii) melt blending the PCR-PP with the DPO-BSA;
- and
- (iv) forming a DPO-BSA coupled PCR-PP having a melt flow rate (MFR I2) equal to, or less than, 5 g/10 min.
2 more elements
A composition comprising:
- a 4,4′-oxydibenzenesulfonyl azide coupled post-consumer recycled polypropylene (DPO-BSA coupled PCR-PP) having
- (i) a melt flow rate (MFR I2) equal to, or less than, 5 g/10 min;
- and
- (ii) from greater than 0 ppm to 350 ppm sulfur,
- wherein the DPO-BSA coupled PCR-PP is void of virgin polypropylene, and the PCR-PP prior to coupling has a property selected from the group consisting of (i) a MFR/I10/I2 from 12 to 35, (ii) at least two melting points, and (iii) combinations thereof.
2 more elements
A molded article comprising
- a first surface layer comprising a polyolefin;
- an inner layer comprising a composition comprising a 4,4′-oxydibenzenesulfonyl azide coupled post-consumer recycled polypropylene (DPO-BSA coupled PCR-PP) void of virgin polypropylene and having a melt flow rate (MFR I2) equal to, or less than, 5 g/10 min wherein the PCR-PP prior to coupling has a property selected from the group consisting of (i) a MFR I10/I2 from 12 to 35, (ii) at least two melting points, and (iii) combinations thereof;
- and
- a second surface layer comprising a propylene-based polymer.
1 more element
Dependencies are inferred from the claim text.