Patent US8043384 - Method for making fire retardant materials and related products

USOO8043384B2

(12) Ullltfild States Patent (10) Patent No.: US 8,043,384 B2 Gagnon et al. (45) Date of Patent: Oct. 25, 2011 (54) METHOD FOR MAKING FIRE RETARDANT 4,302,488 A 11/1981 Lowi, Jr. MATERIALS AND RELATED PRODUCTS 4,342,669 A 8/1982 Wilson at a1~ 4,370,249 A 1/1983 Bird et al. 4,374,171 A 2/1983 M Cart (75) Inventors: Gerard A. Gagnon, Buckfield, ME 4,386,119 A 5/1983 Drcaganif, (US); Riohard W- Munson, South 4,392,994 A 7/1983 wagehei Bristol, ME (US); Daniel Harold 4,407,697 A 10/1983 Sadler et al. Thompson, J1-_, South BI-15101, ME (US); 4,412,659 A ll/1983 Crawford et al. Michael T1l0I‘Il€ Kelly, Bath, ME (US); A gjgofjov Robert A. HHPPGF, Madison, A 8/1984 Michael A. Bilodeau, Brewer, ME (US); 4,437,365 A 12/1934 gperber Mark A. Paradis, Old Town, ME (US) 4,514,326 A 4/ 1935 Sallay 4,530,468 A 7/1985 Sperber (73) Assignees: Green Comfort Safe, Inc., South Q Isililnstfr Bristol, ME (US); University of Maine 4’648’920 A 3/1987 Spgrber Syotorn Board of Trnstoos, Bangor, ME 438343913 A 5/1989 Aseltine et 61. (US) 5,011,091 A 4/1991 Kopecky 5,352,780 A 10/1994 Webb et al. ( * ) Notice: Subject, to any disclaimer, the term of this Q idagfgyet 31" patent is extended or adjusted under 35 533993375 A 3/1995 Rood U-SC 154(b) by 0 dayo 5,455,065 A 10/1995 ROOC1 5,534,301 A 7/1996 Shutt (21) Appl. No.: 12/984,319 5,593,625 A 1/1997 Riebel et al. _ (Continued) (22) Filed: Jan. 4, 2011 FOREIGN PATENT DOCUMENTS (65) Prior Publication Data W0 W0 97/38164 * 10/1997 US 2011/0117354 A1 May 19,2011 OTHER PUBLICATIONS Related U-s- Application Data Statement of Richard W. Munson to Accompany Information Dis(63) Continuation of application No. 12/910,534, filed on Closufe Statement’ -la“ 25’ 2011’ 4 PP and accompanying °°mPa°i QCL 22, 2010, disk with video referenced in the Statement. (60) Provisional application No. 61/254,114, filed on Oct. Primary Examiner _ Lorna M Douyon 22’ 2009' Assistant Examiner — Amina Khan (51) Int CL (74) ,Att0rney, Agent, or Firm — Verrill Dana, LLP; Chris A. D06M 11/82 (2006.01) Caselro (52) U.S. Cl. ....... .. 8/116.1; 8/115.51; 8/115.6; 252/601; 252/607 (57) ABSTRACT (58) Field Of Classification Search ............... .. 8/115.51, A inotnod for n1a1_<ing firo retardant inatorial inoliiding firo 3/115_6, 116_1, 252/601, 607 retardant cellulosic insulation is described. The method gee apphcation file for COmp1e1e Search 111S1O1~y_ includes an arrangement for adding one or more feedstocks and a fire retardancy chemical compound to a common blend (56) References Cited tank prior to feedstock drying. The one or more feedstocks

U.S. PATENT DOCUMENTS

3,931,027 A 1/1976 Sadler et al.
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4,184,969 A 1/1980 Bhat
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may include at least one virgin pulp stock feed and at least one recycled material stock feed. The amount and type of both the virgin feedstock and the recycled material feedstock is selectable. Old newsprint (ONP) may be one type of recycled material feedstock. Another suitable type of recycled material feedstock is old corrugated containers (OCC). The method further includes retaining the fiber feedstock and the chemical compound together for enough time to ensure adherence or impregnations of enough of the chemical to the fibers after the drying process. Flufling or fiberizing of the treated fibers may be accomplished under less severe conditions than ordinarily employed when making conventional cellulose insulation.

17 Claims, 2 Drawing Sheets

Page2

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