The invention relates to an adhesive composition having an added component of rubber-epoxy such as XNBR-epoxy adducts. It was found that the new adhesive composition significantly reduces meander formation in the making of automotive parts.

The invention relates to an adhesive composition having an added component of rubber-epoxy such as XNBR-epoxy adducts. It was found that the new adhesive composition significantly reduces meander formation in the making of automotive parts.

The present invention relates to a composition for a pressure-sensitive adhesive comprising 100 parts by mass (non-volatile fraction) of a main agent comprising a mixture of a natural rubber latex and a synthetic rubber latex, 40 to 120 parts by mass of a rosin-based tackifier resin having a softening point of 130 to 135 C. and 1 to 15 parts by mass of low-molecular-weight polyisoprene having a weight-average molecular weight of 15,000 to 40,000.

The disclosed latex system comprises a one-component, closed-cell, semi-foam, mastic sealant using gas-filled, flexible, organic microspheres to create a product that is elastic and compressible under pressure without protruding in an outward direction when compressed, thereby allowing the applied sealant to compress in an enclosed, maximum-filled channel unlike typical mastic sealants (while retaining the ability to rebound). This allows the sealant to function as a gasket, and, once fully cured, to have properties including vibration damping, insulating, and condensation resistance. The sealant can be formulated as an air barrier or a vapor barrier and at various degrees of moisture resistance. It may be applied by different packaging variations including aerosol can (bag in can or bag on valve), airless sprayer, cartridge tubes, foil tubes, squeeze tubes, and buckets to be applied using a brush, trowel, spatula, etc. The disclosed mastic sealant can also be formulated to be smoke-resistant and flame-resistant.

The disclosed latex system comprises a one-component, closed-cell, semi-foam, mastic sealant using gas-filled, flexible, organic microspheres to create a product that is elastic and compressible under pressure without protruding in an outward direction when compressed, thereby allowing the applied sealant to compress in an enclosed, maximum-filled channel unlike typical mastic sealants (while retaining the ability to rebound). This allows the sealant to function as a gasket, and, once fully cured, to have properties including vibration damping, insulating, and condensation resistance. The sealant can be formulated as an air barrier or a vapor barrier and at various degrees of moisture resistance. It may be applied by different packaging variations including aerosol can (bag in can or bag on valve), airless sprayer, cartridge tubes, foil tubes, squeeze tubes, and buckets to be applied using a brush, trowel, spatula, etc. The disclosed mastic sealant can also be formulated to be smoke-resistant and flame-resistant.

The invention relates to an adhesive composition having an added component of rubber-epoxy such as XNBR-epoxy adducts. It was found that the new adhesive composition significantly reduces meander formation in the making of automotive parts.

In certain embodiments, the disclosed sealant comprises a one-component, closed-cell, semi-foam, sealant using gas-filled, flexible, organic microspheres to create a product that is elastic and compressible under pressure without protruding in an outward direction when compressed, thereby allowing the applied sealant to compress in an enclosed, maximum-filled channel unlike typical mastic sealants (while retaining the ability to rebound). This allows the sealant to function as a gasket, and, once fully cured, to have properties including vibration damping, insulating, and condensation resistance. The sealant can be formulated as an air barrier or a vapor barrier and at various degrees of moisture resistance. It may be applied by different packaging variations including aerosol can (bag in can or bag on valve), airless sprayer, cartridge tubes, foil tubes, squeeze tubes, and buckets to be applied using a brush, trowel, spatula, etc. The disclosed sealant can also be formulated to be smoke-resistant and flame-resistant.

In certain embodiments, the disclosed sealant comprises a one-component, closed-cell, semi-foam, sealant using gas-filled, flexible, organic microspheres to create a product that is elastic and compressible under pressure without protruding in an outward direction when compressed, thereby allowing the applied sealant to compress in an enclosed, maximum-filled channel unlike typical mastic sealants (while retaining the ability to rebound). This allows the sealant to function as a gasket, and, once fully cured, to have properties including vibration damping, insulating, and condensation resistance. The sealant can be formulated as an air barrier or a vapor barrier and at various degrees of moisture resistance. It may be applied by different packaging variations including aerosol can (bag in can or bag on valve), airless sprayer, cartridge tubes, foil tubes, squeeze tubes, and buckets to be applied using a brush, trowel, spatula, etc. The disclosed sealant can also be formulated to be smoke-resistant and flame-resistant.

A polymer latex is described for the preparation of an elastomeric film obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising: a) 15 to 99 wt.-% of conjugated dienes; b) 0 to 80 wt.-% of ethylenically unsaturated nitrile compounds; c) 0 to 70 wt.-% of vinyl aromatic monomers; the sum of ethylenically unsaturated nitrile compounds b) and vinyl aromatic monomers c) being 0.95 to 84.95 wt.-% d) 0.05 to 10 wt.-% of ethylenically unsaturated acids wherein the ethylenically unsaturated acids comprise d1) an ethylenically unsaturated acid comprising an acid functional group; and a spacer group separating the ethylenically unsaturated group and the acid functional group by at least 4 atoms; and e) 0 to 65 wt.-% of co-polymerizable ethylenically unsaturated compounds,
wherein monomers a) to e) are as defined.

A polymer latex is described for the preparation of an elastomeric film obtained by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising: a) 15 to 99 wt.-% of conjugated dienes; b) 0 to 80 wt.-% of ethylenically unsaturated nitrile compounds; c) 0 to 70 wt.-% of vinyl aromatic monomers; the sum of ethylenically unsaturated nitrile compounds b) and vinyl aromatic monomers c) being 0.95 to 84.95 wt.-% d) 0.05 to 10 wt.-% of ethylenically unsaturated acids wherein the ethylenically unsaturated acids comprise d1) an ethylenically unsaturated acid comprising an acid functional group; and a spacer group separating the ethylenically unsaturated group and the acid functional group by at least 4 atoms; and e) 0 to 65 wt.-% of co-polymerizable ethylenically unsaturated compounds,
wherein monomers a) to e) are as defined.