Composition, method of use, and structural barrier system

Abstract

An environmental barrier composition and method of use for forming a structural barrier system to seal structural openings such as doors and windows is provided. The composition includes a liquid rosin that is silyl-terminated polyether, a filler material, and a curing catalyst. The method includes applying the composition to a prepared through-hole in combination with flashing material at least along a bottom surface of the through-hole and installation of a window or door into the prepared through-hole to form a barrier system in which a continuous film can be easily inspected, is waterproof, meet air barrier requirements of ASTM E2178, has elastomeric properties, allows substrate expansion, contraction, and movement, does not shrink or lose volume as it cures, and cures rapidly with sufficient adhesion to transition flashing to incorporate into a designed drainage plane and allow integration of a continuous air barrier system where the barrier is at least semi-vapor-permeable.

1 . A coating composition comprising:
 a liquid resin;   a filler material;   a curing catalyst, wherein the liquid resin is a silyl-terminated polyether.   
   
   
       2 . The coating composition of  claim 1  wherein the silyl-terminated polyether is polypropylene oxide capped at respective termini by a silyl group represented by: —SiR 1   t (OR 2 ) 3-t , wherein, t is 0, 1 or 2, R 1  and R 2  are the same or different and independently an alkyl group. 
   
   
       3 . The coating composition of  claim 2  wherein the silyl group is dimethoxymethylsilyl. 
   
   
       4 . The coating composition of  claim 1  wherein the filler material is calcium carbonate. 
   
   
       5 . The coating composition of  claim 1  wherein the curing catalyst is an organotin compound. 
   
   
       6 . The coating composition of  claim 1 , further comprising one or more light stabilizers. 
   
   
       7 . The coating composition of  claim 6  wherein the one or more light stabilizers are hydroxyphenylbenzotriazole, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, or a combination thereof. 
   
   
       8 . The coating composition of  claim 1 , further comprising an adhesion promoter. 
   
   
       9 . The coating composition of  claim 8  wherein the adhesion promoter is an alkoxysilane. 
   
   
       10 . The coating composition of  claim 1 , further comprising a dehydrator. 
   
   
       11 . The coating composition of  claim 10  wherein the dehydrator is vinyltrimethoxysilane. 
   
   
       12 . The coating composition of  claim 1 , further comprising a plasticizer. 
   
   
       13 . The coating composition of  claim 12  wherein the plasticizer is diisodecyl phthalate. 
   
   
       14 . The coating composition of  claim 1 , further comprising one or more pigments. 
   
   
       15 . A composition, comprising by percent of weight:
 Kaneka 303H, a primary polymer of a cross linked polymer chain of n-(CH—CH 2 O)-n polypropylene oxide, and a functional group (H 3 CO) 2 Si-dimethoxymethylsilyl, modified by up to at least one of 18% DIDP, 50% Duramite, 0.8% Red Iron Oxide, 0.02% Monarch 280, 0.2% Tinuvin 328, 0.2% Tinuvin 765, 1.5% Sul-11a, 1.5% A11-20, and 0.7% A-171.   
   
   
       16 . A composition, comprising by percent of weight:
 Kaneka 303H, a primary polymer of a cross linked polymer chain of n-(CH—CH 2 O)-n polypropylene oxide, and a functional group (H 3 CO) 2 Si-dimethoxymethylsilyl, modified by up to at least one of 15-25% DIDP, 36-60% Duramite, 0.7-5.0% Red Iron Oxide, 0.02-2.0% Monarch 280, 0.15-0.25% Tinuvin 328, 0.15-0.25% Tinuvin 765, 1.0-2.5% Sul-11a, 0.75-2.5% A11-20, and 0.5-1.0% A-171.   
   
   
       17 . A method of forming a structural barrier system for a through-hole in a wall, comprising:
 applying a liquid flashing membrane material to a prepared surface, the material comprising a liquid rosin, a filler material, and a curing catalyst, wherein the liquid rosin is a silyl-terminated polyether; and   applying a sheet of flashing to a selected area in the through-hole and at least partially on the liquid-applied flashing material.   
   
   
       18 . The method of  claim 17 , further comprising installing a window or door unit in the through-hole after the material has cured. 
   
   
       19 . A structural barrier system, comprising:
 a liquid-applied flashing membrane applied to a through-hole formed in a structural member, the liquid-applied flashing material comprising a liquid rosin, a filler material, and a curing catalyst, wherein the liquid rosin is a silyl-terminated polyether;   a sheet of flashing applied partially over the material and to a bottom surface of the through-hole and to extend horizontally on each side of the through-hole on exterior sheathing; and   a window or door unit applied to the through-hole over the flashing and the cured liquid-applied flashing material.   
   
   
       20 . The system of  claim 19  wherein the liquid-applied flashing material is approximately 12 mil thickness. 
   
   
       21 . The system of  claim 20  wherein the liquid-applied flashing material comprises a red iron oxide pigment of sufficient amount to make the liquid-applied flashing material transparent until approximately 12 mil thickness after which it becomes opaque, regardless of its cured or uncured state.