Abstract: plasticizer-containing films based on polyvinyl acetal where the polyvinyl alcohol content of the polyvinyl acetal is less than 20 wt % are useful for production of mirrors for solar thermal power plants which exhibit low creep of the adhesive layer, and low corrosion of the specular surface.

Abstract: The invention relates to polyvinyl acetals obtainable by reacting polyvinyl alcohol with at least one aldehyde with a degree of acetalisation of at least 75 mol %, characterised by an OH blockiness of the polyvinyl acetal, defined as a quotient from the number of methylene groups of two adjacent alcohol sequences (VV) and the sum of the number of methylene groups of adjacent alcohol/acetal sequences and acetal/acetal sequences (VB+BB), of more than 0.151, as well as a process for the preparation thereof.

Abstract: Methods and an apparatuses are provided for sorting particles according to the shape thereof in at least two classification stages in a chronological or spatial sequence.

Abstract: The invention relates to the use of films containing plasticiser and based on polyvinyl acetal with a polyvinyl alcohol content in the polyvinyl acetal of less than 18% by weight and low creep tendency to produce photovoltaic modules.

Abstract: A nonwoven fabric containing a polyvinyl butyral fiber is provided. In particular, continuous fiber nonwoven fabrics, such as a melt-blown nonwoven fabric and a spunbonded nonwoven fabric, are preferred. By laminating a plurality of layers via an adhering layer made of such a nonwoven fabric and then heating, a laminate is obtained by a simple process. In particular, an interior material in which an inorganic fiber layer, a foam layer and a surface material layer are adhered together via the aforementioned type of adhering layers is a desirable embodiment. Such an interior material is excellent in rigidity, sound absorbency and thermal deformation resistance, and therefore is useful as an interior material to be used for cars, railway vehicles, vessels, and the like.

Abstract: Plasticizer-containing films of polyvinyl acetal having a plasticizer content of a maximum of 26% by weight and containing a mixture of at least one high-viscosity polyvinyl acetal having a viscosity of 40-300 mPas and at least one low-viscosity polyvinyl acetal having a viscosity of 5-500 mPas are suitable for the production of photovoltaic modules.

Abstract: Plasticizer-containing films based on polyvinyl acetals having a polyvinyl alcohol content of less than 20% by weight for the production of photovoltaic modules exhibit less water absorption at the edges of the modules. The films preferably have a glass transition temperature Tg of at least 20° C. and/or a plasticizer content of a maximum of 26% by weight.

Abstract: Plasticizer-containing films based on polyvinyl acetal having a glass transition temperature Tg of at least 20° C. are useful for the production of photovoltaic modules. The films preferably have a plasticizer content of a maximum of 26% by weight.

Abstract: Interlayer films useful for laminated glass contain a polyvinyl acetal (A), at least on plasticizer (B), fumed silica (C) and at least one basic compound (D), wherein the difference of refractive index between fumed silica (C) and plasticized polyvinyl acetal (A+B) is 0.015 or less, and the weight ratio of C/(A+B) is 2.7-60/100.

Abstract: An interlayer film for laminated glass with sound-absorbing properties contains at least two individual films, wherein the first individual film comprises a polyvinyl acetal with a portion of polyvinyl acetate groups of 0.1 to 11 mol % and a second individual film comprises a polyvinyl acetal with a portion of polyvinyl acetate groups of between 5 and 8 mol %.

Abstract: The invention relates to a device for adjusting a vehicle seat, the frame structure (4, 5, 6) of which can be adjusted using drive motors (40) having presupported gear units (39), and the vehicle seat is accommodated on two seat rails (1, 2) arranged parallel to each other. The frame structure (4, 5, 6) of the vehicle seat can be adjusted spherically using lifting elements (8, 9, 10) in two planes separated from each other.

Abstract: The invention relates to a method for producing crosslinked polyvinyl acetals, according to which a vinyl alcohol copolymer is reacted with at least one polyaldehyde and is partly esterified.

Abstract: The invention relates to methods for producing crosslinked polyvinyl acetals, according to which a polyvinyl alcohol (A1) containing carboxyl groups is crosslinked by (i) reacting the polymer (A1) with at least one polyaldehyde of formula R9(CHO)n, and (ii) at least partly esterifying groups of formula (1) and formula (4a) with each other, said steps being performed in any order. The invention further relates to methods for producing crosslinked polyvinyl acetals, according to which a polyvinyl alcohol (A2) is crosslinked by (i) reacting the polymer (A2) with at least one compound of formula (6), (ii) adding at least one compound of formula (4b), (iii) adding a polyaldehyde of formula (5), and (iv) at least partly esterifying groups of formula (1) and structural units derived from the compound of formula (4b) with each other, the radicals R7, R8, R9, R10, and R11, and the index n being defined as indicated in the description.

Abstract: A nonwoven fabric containing a polyvinyl butyral fiber is provided. In particular, continuous fiber nonwoven fabrics, such as a melt-blown nonwoven fabric and a spunbonded nonwoven fabric, are preferred. By laminating a plurality of layers via an adhering layer made of such a nonwoven fabric and then heating, a laminate is obtained by a simple process. In particular, an interior material in which an inorganic fiber layer, a foam layer and a surface material layer are adhered together via the aforementioned type of adhering layers is a desirable embodiment. Such an interior material is excellent in rigidity, sound absorbency and thermal deformation resistance, and therefore is useful as an interior material to be used for cars, railway vehicles, vessels, and the like.

Abstract: The invention relates to a method for the production of a granulate containing at least one polyvinyl acetal, wherein a composition containing a polyvinyl acetal is transformed into molten state and granulated in accordance with the desired grain size. The invention also relates to a granulate produced according to said method and to the utilization of the inventive granulate.

Abstract: The invention relates to high-molecular, crosslinked polyvinyl butyrals, obtainable by (self-) crosslinking polyvinyl butyrals that contain coacetalated, acid-functionalized aldehydes. The invention also relates to a method for producing the same and to the use thereof.

Abstract: The invention relates to a cross-linked polyvinyl acetal which is characterized in that it can be obtained from at least one polyvinylacetal (1) which is obtained by reacting at least one polymer (A), which contains a) 1,0 to 99.9 wt. % structural units of formula (1), b.) 0 to 99.0 wt. % structural units of formula (2), c.) 0 to 70.0 wt. % structural formula (3), d.) 0.0001 to 30.0 wt. % structural units of formula (4) respectively in relation to the overall weight of the polymer (A), with at least one compound (B) of formula (5). Furthermore, the present invention relates to methods for the production of the polyvinyl acetal according to the invention as well as its use.

Abstract: The invention relates to a method for producing crosslinked polyvinyl acetals, according to which a vinyl alcohol copolymer is reacted with at least one polyaldehyde and is partly esterified.

Abstract: The invention relates to ion-conductive thermoplastic compositions consisting of a partially acetalated polyvinyl alcohol, at least one support electrolyte and at least one softener, the partially acetalated polyvinyl alcohol containing two different acetal units. The invention also relates to electrochromic laminated glass systems produced using the ion-conductive compositions and to a method for producing said systems.

Abstract: The invention relates to methods for producing crosslinked polyvinyl acetals, according to which a polyvinyl alcohol (A1) containing carboxyl groups is crosslinked by (i) reacting the polymer (A1) with at least one polyaldehyde of formula R9(CHO)n, and (ii) at least partly esterifying groups of formula (1) and formula (4a) with each other, said steps being performed in any order. The invention further relates to methods for producing crosslinked polyvinyl acetals, according to which a polyvinyl alcohol (A2) is crosslinked by (i) reacting the polymer (A2) with at least one compound of formula (6), (ii) adding at least one compound of formula (4b), (iii) adding a polyaldehyde of formula (5), and (iv) at least partly esterifying groups of formula (1) and structural units derived from the compound of formula (4b) with each other, the radicals R7, R8, R9, R10, and R11, and the index n being defined as indicated in the description.