A composition includes a reaction product of a mixture of elemental sulfur and at least a first ethylenically unsaturated compound comprising a hydroxyl or carboxyl group.

The present invention concerns the field of binders suitable for wood panel manufacturing. In particular, the invention regards methods for producing bio-based formaldehyde-free binders. In a further aspect the present invention describes bio-based formaldehyde-free binders obtainable from the described methods and their uses. The invention further describes methods for gluing articles and formaldehyde-free products obtainable from the methods of the present invention.

Provided is an elastomer which is suitable for application in actuators or sensors, and which exhibits an appropriately low initial elastic modulus in a low deformation region.

An elastomer composition containing the following components (A) to (D):

component (A): a polyrotaxane;

component (B): a crosslinking agent containing a second linear molecule having a molecular weight of 1,200 to 7,000, and a functional group disposed at both ends of the second linear molecule;

component (C): a double-reactive component having a reactive group at both ends; and

component (D): a single-reactive component having a reactive group at only one end, wherein at least a portion of the functional group in the component (B) is directly or indirectly bonded to the cyclic molecule in the component (A), and the elastomer composition exhibits an initial elastic modulus of 0.6 to 2 MPa.

Provided is an elastomer which is suitable for application in actuators or sensors, and which exhibits an appropriately low initial elastic modulus in a low deformation region.

An elastomer composition containing the following components (A) to (D):

component (A): a polyrotaxane;

component (B): a crosslinking agent containing a second linear molecule having a molecular weight of 1,200 to 7,000, and a functional group disposed at both ends of the second linear molecule;

component (C): a double-reactive component having a reactive group at both ends; and

component (D): a single-reactive component having a reactive group at only one end, wherein at least a portion of the functional group in the component (B) is directly or indirectly bonded to the cyclic molecule in the component (A), and the elastomer composition exhibits an initial elastic modulus of 0.6 to 2 MPa.

The invention relates to a process for preparing a derivatized polysaccharide and stable isocyanate-based dispersions comprising derivatized polysaccharide.

This application provides a fruit extract leather. The fruit extract leather includes a prepolymer material A, a prepolymer material B, and a base fabric. The prepolymer material A includes a fruit powder, and the fruit powder is obtained by grinding a remaining residue material obtained after fruit peels and/or fruit kernels are extracted. This application further provides a method for preparing the fruit extract leather. According to the fruit extract leather and the preparation method thereof provided in this application, polyester and other components in leather are substituted, fruit peels and/or fruit kernels are recycled, and waste and environmental pollution are reduced.

An interpenetrating network (IPN) polymer membrane material includes a soft polyurethane interspersed with a crosslinked conducting polymer. The material can be reversibly “switched” between its oxidized and reduced states by the application of a small voltage, ˜1 to 4 volts, thus modulating its diffusivity.

An interpenetrating network (IPN) polymer membrane material includes a soft polyurethane interspersed with a crosslinked conducting polymer. The material can be reversibly “switched” between its oxidized and reduced states by the application of a small voltage, ˜1 to 4 volts, thus modulating its diffusivity.

Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, a polyethyleneamine mixture having a number average molecular weight of 175 to 450 and an alkali metal, phosphonium or ammonium sulfite. Foams so produced emit low levels of formaldehyde, acetaldehyde, acrolein and propionaldehyde.

Polymers are disclosed that incorporate portions of secondary or tertiary polyamide segments connected with polyisocyanates. These polymers have enhanced matting properties. The enhanced matting properties are from creating an inherently matt surface from the polymer without the use of any separate fine particle size matting additives. Conventional matting agents such as fine particle size silica usually results in loss of physical properties such as haze development and porosity in the coating from the matting agent. Composites and hybrids of these polymers and other polyamides, polyurethane with vinyl polymers (acrylates) are also disclosed and claimed.