Method for preparing a completely covered foam molding

Claim 2

A PROCESS FOR PRODUCING A MOULDED ARTICLE WHICH COMPRISES THE STEPS OF APPLYING A VINYL CHLORIDE POLYMER CONTAINING PLASTICIZER TO THE INTERNAL SURFACES OF A MOULD WHICH IS PREHEATED TO A TEMPERATURE OF FROM 30* TO 150*C., THEREAFTER COMPLETELY FILLING THE MOULD WITH GRANULES OF A THERMOPLASTIC OR ELASTICTHERMOPLASTIC POLYMER CONTAINING A BLOWING AGENT AND HEATING THE MOULD TO A TEMPERATURE OF FROM 150* TO 270*C. UNTIL THE VINYL CHLORIDE POLYMER CONTAINING A PLASTICIZER HAS FORMED A HOMPGENEOUS COVERING LAYER AND THE THERMOPLASTIC OR ELASTIC-THERMOPLASTIC POLYMER HAS FORMED A FOAMED CORE HAVING A UNIFORM DENSITY OF 0.2 TO 0.8 G/CM3 OR HAVING ZONES OF DIFFERENT UNIFORM DENSITIES IN THE RANGE OF FROM 0.2 TO 0.8 G/CM3, SAID CORE COMPRISING

Claim 3

FROM 5 TO 60 PERCENT BY WEIGHT OF A RUBBERY ELASTIC BUTADIENE IS ISOPRENE POLYMER CONTAINING UP TO 50 PERCENT BY WEIGHT OF COPOLYMERIZED STYRENE, ACRYLONITRILE OR A LOWER ALKYL ESTER OF ACRYLIC OR METHACRYLIC ACID OR A POLYALKYL ACRYLATE OR A CIS- OR TRANS-POLYPENTENAMER OR ETHYLENEPROPYLENE TERPOLYMER CONTAINING NOT MORE THAN 10 PERCENT BY WEIGHT OF TER-COMPONENT AND

Claim 4

FROM 5 TO 60 PERCENT BY WEIGHT OF A RUBBERY ELASTIC BUTADIENE IS ISOPRENE POLYMER CONTAINING UP TO 50 PERCENT BY WEIGHT OF COPOLYMERIZED STYRENE, ACRYLONITRILE OR A LOWER ALKYL ESTER OF ACRYLIC OR METHACRYLIC ACID OR A POLYALKYL ACRYLATE OR A CIS- OR TRANS-POLYPENTENAMER OR ETHYLENEPROPYLENE TERPOLYMER CONTAINING NOT MORE THAN 10 PERCENT BY WEIGHT OF TER-COMPONENT AND

Claim 5

FROM 95 TO 40 PERCENT WEIGHT OF POLYMERISED (A) STYRENE, ALKYLSTYRENE, METHYL METHACRYLATE OR MIXTURES THEREOF AND (B) STYRENE, ACRYLONITRILE, ALKYLACRYLONITRILE, METHYL METHACRYLATE OR MIXTURES THEREOF IN A PROPORTION BY WEIGHT OF (A):(B) IN THE RANGE OF FROM 95:5 TO 50:50; IN WHICH THE MONOMERS (2) HAVE BEEN COMPLETELY OR PARTIALLY POLYMERISED IN THE PRESENCE OF POLYMER (1) AND A RESIDUE OF THE MONOMERS (2) HAS BEEN ADDED IN THE FORM OF A SEPARATELY MADE COPOLYMER, AND SAID COVERING LAYER COMPRISING A. FROM 30 TO 85 PERCENT BY WEIGHT OF A VINYL CHLORIDE COPOLYMER CONTAINING UP TO 20 PERCENT BY WEIGHT OF COMONOMERS WITH A K-VALUE ACCORDING TO FIKENTSCHER OF FROM 55 TO 80, WHICH IS SUITABLE FOR THE PREPARATION OF A PLASTISOL; OR A MIXTURE OF FROM 90 TO 30 PERCENT BY WEIGHT, OF A VINYL CHLORIDE POLYMER WHICH HAS A K-VALUE OF FROM 55 TO 80 AND A PARTICLE SIZE OF FROM 0.2 TO 50 U, AND FROM 10 TO 70 PERCENT BY WEIGHT OF A VINYL CHLORIDE POLYMER WHICH HAS A K-VALUE OF FROM 55 TO 80 AND A PARTICLE SIZE OF FROM 50 TO 500U AND B. FROM 70 TO 15 PERCENT BY WEIGHT OF A SATURATED OR UNSATURATED MONOMERIC PLASTICISER OR MIXTURES THEREOF IN WHICH THE VINYL CHLORIDE POLYMERS ARE NOT COMPLETELY SOLUBLE.

Claim 6

FROM 95 TO 40 PERCENT WEIGHT OF POLYMERISED (A) STYRENE, ALKYLSTYRENE, METHYL METHACRYLATE OR MIXTURES THEREOF AND (B) STYRENE, ACRYLONITRILE, ALKYLACRYLONITRILE, METHYL METHACRYLATE OR MIXTURES THEREOF IN A PROPORTION BY WEIGHT OF (A):(B) IN THE RANGE OF FROM 95:5 TO 50:50; IN WHICH THE MONOMERS (2) HAVE BEEN COMPLETELY OR PARTIALLY POLYMERISED IN THE PRESENCE OF POLYMER (1) AND A RESIDUE OF THE MONOMERS (2) HAS BEEN ADDED IN THE FORM OF A SEPARATELY MADE COPOLYMER, AND SAID COVERING LAYER COMPRISING A. FROM 30 TO 85 PERCENT BY WEIGHT OF A VINYL CHLORIDE COPOLYMER CONTAINING UP TO 20 PERCENT BY WEIGHT OF COMONOMERS WITH A K-VALUE ACCORDING TO FIKENTSCHER OF FROM 55 TO 80, WHICH IS SUITABLE FOR THE PREPARATION OF A PLASTISOL; OR A MIXTURE OF FROM 90 TO 30 PERCENT BY WEIGHT, OF A VINYL CHLORIDE POLYMER WHICH HAS A K-VALUE OF FROM 55 TO 80 AND A PARTICLE SIZE OF FROM 0.2 TO 50 U, AND FROM 10 TO 70 PERCENT BY WEIGHT OF A VINYL CHLORIDE POLYMER WHICH HAS A K-VALUE OF FROM 55 TO 80 AND A PARTICLE SIZE OF FROM 50 TO 500U AND B. FROM 70 TO 15 PERCENT BY WEIGHT OF A SATURATED OR UNSATURATED MONOMERIC PLASTICISER OR MIXTURES THEREOF IN WHICH THE VINYL CHLORIDE POLYMERS ARE NOT COMPLETELY SOLUBLE.

Claim 7

from 95 to 40 percent by weight of polymerised (a) styrene, alkylstyrene, methyl methacrylate or mixtures thereof and (b) styrene, acrylonitrile, alkylacrylonitrile, methyl methacrylate or mixtures thereof in a proportion by weight of (a):(b) in the range of from 95:5 to 50:50, in which the monomers (2) have been completely or partially polymerised in the presence of polymer (1) and a residue of the monomers (2) has been added in the form of a separately made copolymer, and said covering layer comprising a. from 30 to 85 percent by weight of a vinyl chloride copolymer containing up to 20 percent by weight of comonomers with a K-value according to Fikentscher of from 55 to 80, which is suitable for the preparation of a plastisol; or a mixture of from 90 to 30 percent by weight, of a vinyl chloride polymer which has a K-value of from 55 to 80 and a particle size of from 0.2 to 50 Mu , and from 10 to 70 percent by weight of a vinyl chloride polymer which has a K-value of from 55 to 80 and a particle size of from 50 to 500 Mu and b. from 70 to 15 percent by weight of a saturated or unsaturated monomeric plasticiser or mixtures thereof in which the vinyl chloride polymers are not completely soluble.

Claim 8

from 95 to 40 percent by weight of polymerised (a) styrene, alkylstyrene, methyl methacrylate or mixtures thereof and (b) styrene, acrylonitrile, alkylacrylonitrile, methyl methacrylate or mixtures thereof in a proportion by weight of (a):(b) in the range of from 95:5 to 50:50, in which the monomers (2) have been completely or partially polymerised in the presence of polymer (1) and a residue of the monomers (2) has been added in the form of a separately made copolymer, and said covering layer comprising a. from 30 to 85 percent by weight of a vinyl chloride copolymer containing up to 20 percent by weight of comonomers with a K-value according to Fikentscher of from 55 to 80, which is suitable for the preparation of a plastisol; or a mixture of from 90 to 30 percent by weight, of a vinyl chloride polymer which has a K-value of from 55 to 80 and a particle size of from 0.2 to 50 Mu , and from 10 to 70 percent by weight of a vinyl chloride polymer which has a K-value of from 55 to 80 and a particle size of from 50 to 500 Mu and b. from 70 to 15 percent by weight of a saturated or unsaturated monomeric plasticiser or mixtures thereof in which the vinyl chloride polymers are not completely soluble.

Claim 9

The process as claimed in claim 1 wherein the vinyl chloride polymer containing a plasticiser is applied to the mould by brush coating, trowelling or spraying.

Claim 10

The process as claimed in claim 1, wherein the blowing agent is azodicarbonamide or a sulphohydrazide.

Claim 11

The process as claimed in claim 1, wherein the blowing agent is benzazimide.

Claim 12

The process as claimed in claim 1, wherein the blowing agent is a hydrocarbon or a halogenated hydrocarbon having a boiling point below the second order tansition temperature of the polymer used.