Energy saving, expandable, pumpable, anti-flutter compositions for use in automotive body-in-white (biw) applications
OwnerThanikaivelan Tindivanam Veeraraghavan, Karthikeyan Sengotaiyan +1inventors
InventorsThanikaivelan Tindivanam Veeraraghavan, Karthikeyan Sengotaiyan, Senthilkumar Veeraraghavan
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Abstract
A low temperature curable anti-flutter composition which cures to form a cured product, including: (a) a first copolymer, wherein the first copolymer comprises a rubber having at least one nitrile functional group; and (b) a second copolymer, wherein the second copolymer comprises a rubber having styrene-butadiene functional groups, wherein the composition is a room temperature pumpable sealant which is capable of expanding and curing at temperatures below 140° C. in less than 15 minutes.
Claims21
1-20. (canceled)
A low temperature curable anti-flutter composition, comprising:
- a pre-crosslinked butadiene-acrylonitrile copolymer rubber;
- a PVC homopolymer dispersion resin;
- a PVC homopolymer gelation resin;
- calcium oxide;
- an adhesion promoter;
- a curing accelerator;
- a blowing agent;
- a calcium carbonate filler;
- a precipitated calcium carbonate thixotropic agent;
- a wetting agent;
- conductive carbon black;
- an antioxidant;
- a linear nonyl phthalate plasticizer;
- a high solvating non-phthalate plasticizer;
- a triaryl phosphate plasticizer;
- wherein the composition is pumpable at room temperature;
- and wherein the composition cures at 140° C. in 15 minutes to produce volume expansion.
A method of forming an automotive anti-flutter seal, comprising the steps of:
- providing a composition comprising a pre-crosslinked butadiene-acrylonitrile copolymer rubber, a PVC resin, an organic peroxide curing agent, calcium oxide, an adhesion promoter, a curing accelerator, a blowing agent, calcium carbonate materials, a wetting agent, conductive carbon black, an antioxidant, and plasticizers;
- pumping said composition at room temperature through application equipment;
- and
- curing said composition at 140° C. for 15 minutes to form an expanded seal.
A low temperature curable anti-flutter composition, comprising:
- 1.2 wt % pre-crosslinked butadiene-acrylonitrile copolymer rubber;
- a PVC homopolymer resin totaling at least 30 wt %;
- an organic peroxide curing agent;
- calcium oxide;
- an adhesion promoter;
- a curing accelerator;
- a blowing agent;
- calcium carbonate materials totaling at least 25 wt %;
- a wetting agent;
- conductive carbon black;
- an antioxidant;
- plasticizers totaling at least 15 wt %;
- wherein the composition exhibits 100% cohesive failure when tested according to ASTM D1002 after curing at 140° C. for 15 minutes.
Dependencies are inferred from the claim text.