Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ethylenically unsaturated reactant admixed with a preformed...
Patent
1978-01-23
1979-07-17
DeBenedictis, Thomas
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ethylenically unsaturated reactant admixed with a preformed...
525 71, 525 80, 525 84, 525 87, 525 93, 525 96, 525 99, 525 98, 525901, C08L 5104, C08L 5302
Patent
active
041614720
ABSTRACT:
Polyvinyl chloride (PVC) resin is compounded with a conventional impact modifier referred to herein as a "co-modifier", and a block copolymer "ultra-modifier" which together provide a composition of unexpectedly enhanced impact strength. Irrespective of the characteristic particle size distribution of the co-modifier, which may be normal, bimodal or neither, the combination of ultra-modifier and co-modifier produces a broad distribution of small and large modifier particles. Better impact strength than with either small particles alone, or large particles alone is thus obtained. The ultra-modifier, which synergistically increases the impact strength of conventionally impact-modified vinyl chloride polymer compositions, consists essentially of a block copolymer of a vinyl aromatic compound and a conjugated diene, such as a styrene-diene (SD) diblock copolymer, or styrene-diene-styrene (SDS) block copolymer; the ultra-modifier is a polyblock copolymer, including linear diblock, triblock, tetrablock copolymers, and radial block copolymers including triblock and tetrablock copolymers. The co-modifier may be any elastomer additive, preferably a nucleated rubbery graft copolymer.
REFERENCES:
patent: 3511896 (1970-05-01), Harmer
patent: 3557252 (1971-01-01), Hsieh et al.
patent: 3641206 (1972-02-01), Weitzel et al.
patent: 3652483 (1972-03-01), Tanaka et al.
patent: 3678133 (1972-07-01), Ryan
patent: 3801529 (1974-04-01), Potter
patent: 3825622 (1974-07-01), Robeson
patent: 3992485 (1976-11-01), Kosugi et al.
patent: 4054615 (1977-10-01), Hardt et al.
patent: 4078018 (1978-03-01), Chauvel et al.
Penn PVC Technology, 3rd ed. (Wiley 1972) pp. 231-237, 372-375.
DeBenedictis Thomas
Lindsay James R.
The B. F. Goodrich Company
LandOfFree
Impact modified vinyl chloride polymer composition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Impact modified vinyl chloride polymer composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impact modified vinyl chloride polymer composition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-317181